libevas-dev 1.8.6-2.5+b2 / usr / include / evas-1 / Evas_Legacy.h

#ifndef _EVAS_H
# error You shall not include this header directly
#endif

/**
 * @ingroup Evas_Canvas
 *
 * @{
 */
/**
 * Creates a new empty evas.
 *
 * Note that before you can use the evas, you will to at a minimum:
 * @li Set its render method with @ref evas_output_method_set .
 * @li Set its viewport size with @ref evas_output_viewport_set .
 * @li Set its size of the canvas with @ref evas_output_size_set .
 * @li Ensure that the render engine is given the correct settings
 *     with @ref evas_engine_info_set .
 *
 * This function should only fail if the memory allocation fails
 *
 * @note this function is very low level. Instead of using it
 *       directly, consider using the high level functions in
 *       @ref Ecore_Evas_Group such as @c ecore_evas_new(). See
 *       @ref Ecore.
 *
 * @attention it is recommended that one calls evas_init() before
 *       creating new canvas.
 *
 * @return A new uninitialised Evas canvas on success. Otherwise, @c NULL.
 * @ingroup Evas_Canvas
 */
EAPI Evas             *evas_new(void) EINA_WARN_UNUSED_RESULT EINA_MALLOC;

/**
 * Frees the given evas and any objects created on it.
 *
 * Any objects with 'free' callbacks will have those callbacks called
 * in this function.
 *
 * @param   e The given evas.
 *
 * @ingroup Evas_Canvas
 */
EAPI void              evas_free(Evas *e)  EINA_ARG_NONNULL(1);

/**
 * Inform to the evas that it got the focus.
 *
 * @param e The evas to change information.
 * @ingroup Evas_Canvas
 */
EAPI void              evas_focus_in(Evas *e);

/**
 * Inform to the evas that it lost the focus.
 *
 * @param e The evas to change information.
 * @ingroup Evas_Canvas
 */
EAPI void              evas_focus_out(Evas *e);

/**
 * Get the focus state known by the given evas
 *
 * @param e The evas to query information.
 * @return @c EINA_TRUE if it got the focus, @c EINA_FALSE otherwise.
 * @ingroup Evas_Canvas
 */
EAPI Eina_Bool         evas_focus_state_get(const Evas *e);

/**
 * Push the nochange flag up 1
 *
 * This tells evas, that while the nochange flag is greater than 0, do not
 * mark objects as "changed" when making changes.
 *
 * @param e The evas to change information.
 * @ingroup Evas_Canvas
 */
EAPI void              evas_nochange_push(Evas *e);

/**
 * Pop the nochange flag down 1
 *
 * This tells evas, that while the nochange flag is greater than 0, do not
 * mark objects as "changed" when making changes.
 *
 * @param e The evas to change information.
 * @ingroup Evas_Canvas
 */
EAPI void              evas_nochange_pop(Evas *e);

/**
 * Attaches a specific pointer to the evas for fetching later
 *
 * @param e The canvas to attach the pointer to
 * @param data The pointer to attach
 * @ingroup Evas_Canvas
 */
EAPI void              evas_data_attach_set(Evas *e, void *data) EINA_ARG_NONNULL(1);

/**
 * Returns the pointer attached by evas_data_attach_set()
 *
 * @param e The canvas to attach the pointer to
 * @return The pointer attached
 * @ingroup Evas_Canvas
 */
EAPI void             *evas_data_attach_get(const Evas *e) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Add a damage rectangle.
 *
 * @param e The given canvas pointer.
 * @param x The rectangle's left position.
 * @param y The rectangle's top position.
 * @param w The rectangle's width.
 * @param h The rectangle's height.
 *
 * This is the function by which one tells evas that a part of the
 * canvas has to be repainted.
 *
 * @note All newly created Evas rectangles get the default color values of 255 255 255 255 (opaque white).
 *
 * @ingroup Evas_Canvas
 */
EAPI void              evas_damage_rectangle_add(Evas *e, int x, int y, int w, int h) EINA_ARG_NONNULL(1);

/**
 * Add an "obscured region" to an Evas canvas.
 *
 * @param e The given canvas pointer.
 * @param x The rectangle's top left corner's horizontal coordinate.
 * @param y The rectangle's top left corner's vertical coordinate
 * @param w The rectangle's width.
 * @param h The rectangle's height.
 *
 * This is the function by which one tells an Evas canvas that a part
 * of it <b>must not</b> be repainted. The region must be
 * rectangular and its coordinates inside the canvas viewport are
 * passed in the call. After this call, the region specified won't
 * participate in any form in Evas' calculations and actions during
 * its rendering updates, having its displaying content frozen as it
 * was just after this function took place.
 *
 * We call it "obscured region" because the most common use case for
 * this rendering (partial) freeze is something else (most probably
 * other canvas) being on top of the specified rectangular region,
 * thus shading it completely from the user's final scene in a
 * display. To avoid unnecessary processing, one should indicate to the
 * obscured canvas not to bother about the non-important area.
 *
 * The majority of users won't have to worry about this function, as
 * they'll be using just one canvas in their applications, with
 * nothing inset or on top of it in any form.
 *
 * To make this region one that @b has to be repainted again, call the
 * function evas_obscured_clear().
 *
 * @note This is a <b>very low level function</b>, which most of
 * Evas' users wouldn't care about.
 *
 * @note This function does @b not flag the canvas as having its state
 * changed. If you want to re-render it afterwards expecting new
 * contents, you have to add "damage" regions yourself (see
 * evas_damage_rectangle_add()).
 *
 * @see evas_obscured_clear()
 * @see evas_render_updates()
 *
 * Example code follows.
 * @dontinclude evas-events.c
 * @skip add an obscured
 * @until evas_obscured_clear(evas);
 *
 * In that example, pressing the "Ctrl" and "o" keys will impose or
 * remove an obscured region in the middle of the canvas. You'll get
 * the same contents at the time the key was pressed, if toggling it
 * on, until you toggle it off again (make sure the animation is
 * running on to get the idea better). See the full @ref
 * Example_Evas_Events "example".
 *
 * @ingroup Evas_Canvas
 */
EAPI void              evas_obscured_rectangle_add(Evas *e, int x, int y, int w, int h) EINA_ARG_NONNULL(1);

/**
 * Remove all "obscured regions" from an Evas canvas.
 *
 * @param e The given canvas pointer.
 *
 * This function removes all the rectangles from the obscured regions
 * list of the canvas @p e. It takes obscured areas added with
 * evas_obscured_rectangle_add() and make them again a regions that @b
 * have to be repainted on rendering updates.
 *
 * @note This is a <b>very low level function</b>, which most of
 * Evas' users wouldn't care about.
 *
 * @note This function does @b not flag the canvas as having its state
 * changed. If you want to re-render it afterwards expecting new
 * contents, you have to add "damage" regions yourself (see
 * evas_damage_rectangle_add()).
 *
 * @see evas_obscured_rectangle_add() for an example
 * @see evas_render_updates()
 *
 * @ingroup Evas_Canvas
 */
EAPI void              evas_obscured_clear(Evas *e) EINA_ARG_NONNULL(1);

/**
 * Render the given Evas canvas asynchronously.
 *
 * @param e The canvas to render.
 * @param func Optional function to call with the list of updated areas.
 * @param data User data to pass to @p func.
 *
 * @return EINA_TRUE if the canvas will render, EINA_FALSE otherwise.
 *
 * This function only returns EINA_TRUE when a frame will be rendered. If the
 * previous frame is still rendering, EINA_FALSE will be returned so the users
 * know not to wait for the updates callback and just return to their main
 * loop.
 *
 * If a @p func callback is given, a list of updated areas will be generated
 * and the function will be called from the main thread after the rendered
 * frame is flushed to the screen. The resulting list should be freed with
 * @f evas_render_updates_free().
 * The list is given in the @p event_info parameter of the callback function.
 *
 * @ingroup Evas_Canvas
 * @since 1.8
 */
EAPI Eina_Bool         evas_render_async(Evas *e) EINA_ARG_NONNULL(1);

/**
 * Force immediate renderization of the given Evas canvas.
 *
 * @param e The given canvas pointer.
 * @return A newly allocated list of updated rectangles of the canvas
 *        (@c Eina_Rectangle structs). Free this list with
 *        evas_render_updates_free().
 *
 * This function forces an immediate renderization update of the given
 * canvas @p e.
 *
 * @note This is a <b>very low level function</b>, which most of
 * Evas' users wouldn't care about. One would use it, for example, to
 * grab an Evas' canvas update regions and paint them back, using the
 * canvas' pixmap, on a displaying system working below Evas.
 *
 * @note Evas is a stateful canvas. If no operations changing its
 * state took place since the last rendering action, you won't see no
 * changes and this call will be a no-op.
 *
 * Example code follows.
 * @dontinclude evas-events.c
 * @skip add an obscured
 * @until d.obscured = !d.obscured;
 *
 * See the full @ref Example_Evas_Events "example".
 *
 * @ingroup Evas_Canvas
 */
EAPI Eina_List        *evas_render_updates(Evas *e) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Force renderization of the given canvas.
 *
 * @param e The given canvas pointer.
 *
 * @ingroup Evas_Canvas
 */
EAPI void              evas_render(Evas *e) EINA_ARG_NONNULL(1);

/**
 * Update the canvas internal objects but not triggering immediate
 * renderization.
 *
 * @param e The given canvas pointer.
 *
 * This function updates the canvas internal objects not triggering
 * renderization. To force renderization function evas_render() should
 * be used.
 *
 * @see evas_render.
 *
 * @ingroup Evas_Canvas
 */
EAPI void              evas_norender(Evas *e) EINA_ARG_NONNULL(1);

/**
 * Make the canvas discard internally cached data used for rendering.
 *
 * @param e The given canvas pointer.
 *
 * This function flushes the arrays of delete, active and render objects.
 * Other things it may also discard are: shared memory segments,
 * temporary scratch buffers, cached data to avoid re-compute of that data etc.
 *
 * @ingroup Evas_Canvas
 */
EAPI void              evas_render_idle_flush(Evas *e) EINA_ARG_NONNULL(1);

/**
 * Make the canvas discard as much data as possible used by the engine at
 * runtime.
 *
 * @param e The given canvas pointer.
 *
 * This function will unload images, delete textures and much more, where
 * possible. You may also want to call evas_render_idle_flush() immediately
 * prior to this to perhaps discard a little more, though evas_render_dump()
 * should implicitly delete most of what evas_render_idle_flush() might
 * discard too.
 *
 * @ingroup Evas_Canvas
 */
EAPI void              evas_render_dump(Evas *e) EINA_ARG_NONNULL(1);


/**
 * @}
 */


/**
 * @ingroup Evas_Output_Method
 *
 * @{
 */

/**
 * Sets the output engine for the given evas.
 *
 * Once the output engine for an evas is set, any attempt to change it
 * will be ignored.  The value for @p render_method can be found using
 * @ref evas_render_method_lookup .
 *
 * @param   e             The given evas.
 * @param   render_method The numeric engine value to use.
 *
 * @attention it is mandatory that one calls evas_init() before
 *       setting the output method.
 *
 * @ingroup Evas_Output_Method
 */
EAPI void              evas_output_method_set(Evas *e, int render_method) EINA_ARG_NONNULL(1);

/**
 * Retrieves the number of the output engine used for the given evas.
 * @param   e The given evas.
 * @return  The ID number of the output engine being used.  @c 0 is
 *          returned if there is an error.
 * @ingroup Evas_Output_Method
 */
EAPI int               evas_output_method_get(const Evas *e) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Retrieves the current render engine info struct from the given evas.
 *
 * The returned structure is publicly modifiable.  The contents are
 * valid until either @ref evas_engine_info_set or @ref evas_render
 * are called.
 *
 * This structure does not need to be freed by the caller.
 *
 * @param   e The given evas.
 * @return  A pointer to the Engine Info structure.  @c NULL is returned if
 *          an engine has not yet been assigned.
 * @ingroup Evas_Output_Method
 */
EAPI Evas_Engine_Info *evas_engine_info_get(const Evas *e) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Applies the engine settings for the given evas from the given @c
 * Evas_Engine_Info structure.
 *
 * To get the Evas_Engine_Info structure to use, call @ref
 * evas_engine_info_get .  Do not try to obtain a pointer to an
 * @c Evas_Engine_Info structure in any other way.
 *
 * You will need to call this function at least once before you can
 * create objects on an evas or render that evas.  Some engines allow
 * their settings to be changed more than once.
 *
 * Once called, the @p info pointer should be considered invalid.
 *
 * @param   e    The pointer to the Evas Canvas
 * @param   info The pointer to the Engine Info to use
 * @return  @c EINA_TRUE if no error occurred, @c EINA_FALSE otherwise.
 * @ingroup Evas_Output_Method
 */
EAPI Eina_Bool         evas_engine_info_set(Evas *e, Evas_Engine_Info *info) EINA_ARG_NONNULL(1);
/**
 * @}
 */

/**
 * @ingroup Evas_Output_Size
 *
 * @{
 */
/**
 * Sets the output size of the render engine of the given evas.
 *
 * The evas will render to a rectangle of the given size once this
 * function is called.  The output size is independent of the viewport
 * size.  The viewport will be stretched to fill the given rectangle.
 *
 * The units used for @p w and @p h depend on the engine used by the
 * evas.
 *
 * @param   e The given evas.
 * @param   w The width in output units, usually pixels.
 * @param   h The height in output units, usually pixels.
 * @ingroup Evas_Output_Size
 */
EAPI void              evas_output_size_set(Evas *e, int w, int h) EINA_ARG_NONNULL(1);

/**
 * Retrieve the output size of the render engine of the given evas.
 *
 * The output size is given in whatever the output units are for the
 * engine.
 *
 * If either @p w or @p h is @c NULL, then it is ignored.  If @p e is
 * invalid, the returned results are undefined.
 *
 * @param   e The given evas.
 * @param   w The pointer to an integer to store the width in.
 * @param   h The pointer to an integer to store the height in.
 * @ingroup Evas_Output_Size
 */
EAPI void              evas_output_size_get(const Evas *e, int *w, int *h) EINA_ARG_NONNULL(1);

/**
 * Sets the output viewport of the given evas in evas units.
 *
 * The output viewport is the area of the evas that will be visible to
 * the viewer.  The viewport will be stretched to fit the output
 * target of the evas when rendering is performed.
 *
 * @note The coordinate values do not have to map 1-to-1 with the output
 *       target.  However, it is generally advised that it is done for ease
 *       of use.
 *
 * @param   e The given evas.
 * @param   x The top-left corner x value of the viewport.
 * @param   y The top-left corner y value of the viewport.
 * @param   w The width of the viewport.  Must be greater than 0.
 * @param   h The height of the viewport.  Must be greater than 0.
 * @ingroup Evas_Output_Size
 */
EAPI void              evas_output_viewport_set(Evas *e, Evas_Coord x, Evas_Coord y, Evas_Coord w, Evas_Coord h) EINA_ARG_NONNULL(1);

/**
 * Get the render engine's output viewport co-ordinates in canvas units.
 * @param e The pointer to the Evas Canvas
 * @param x The pointer to a x variable to be filled in
 * @param y The pointer to a y variable to be filled in
 * @param w The pointer to a width variable to be filled in
 * @param h The pointer to a height variable to be filled in
 * @ingroup Evas_Output_Size
 *
 * Calling this function writes the current canvas output viewport
 * size and location values into the variables pointed to by @p x, @p
 * y, @p w and @p h.  On success the variables have the output
 * location and size values written to them in canvas units. Any of @p
 * x, @p y, @p w or @p h that are @c NULL will not be written to. If @p e
 * is invalid, the results are undefined.
 *
 * Example:
 * @code
 * extern Evas *evas;
 * Evas_Coord x, y, width, height;
 *
 * evas_output_viewport_get(evas, &x, &y, &w, &h);
 * @endcode
 */
EAPI void              evas_output_viewport_get(const Evas *e, Evas_Coord *x, Evas_Coord *y, Evas_Coord *w, Evas_Coord *h) EINA_ARG_NONNULL(1);

/**
 * Sets the output framespace size of the render engine of the given evas.
 *
 * The framespace size is used in the Wayland engines to denote space where
 * the output is not drawn. This is mainly used in ecore_evas to draw borders
 *
 * The units used for @p w and @p h depend on the engine used by the
 * evas.
 *
 * @param   e The given evas.
 * @param   x The left coordinate in output units, usually pixels.
 * @param   y The top coordinate in output units, usually pixels.
 * @param   w The width in output units, usually pixels.
 * @param   h The height in output units, usually pixels.
 * @ingroup Evas_Output_Size
 * @since 1.1
 */
EAPI void              evas_output_framespace_set(Evas *e, Evas_Coord x, Evas_Coord y, Evas_Coord w, Evas_Coord h);

/**
 * Get the render engine's output framespace co-ordinates in canvas units.
 *
 * @param e The pointer to the Evas Canvas
 * @param x The pointer to a x variable to be filled in
 * @param y The pointer to a y variable to be filled in
 * @param w The pointer to a width variable to be filled in
 * @param h The pointer to a height variable to be filled in
 * @ingroup Evas_Output_Size
 * @since 1.1
 */
EAPI void              evas_output_framespace_get(const Evas *e, Evas_Coord *x, Evas_Coord *y, Evas_Coord *w, Evas_Coord *h);
/**
 * @}
 */

/**
 * Convert/scale an output screen co-ordinate into canvas co-ordinates
 *
 * @param e The pointer to the Evas Canvas
 * @param x The screen/output x co-ordinate
 * @return The screen co-ordinate translated to canvas unit co-ordinates
 * @ingroup Evas_Coord_Mapping_Group
 *
 * This function takes in a horizontal co-ordinate as the @p x
 * parameter and converts it into canvas units, accounting for output
 * size, viewport size and location, returning it as the function
 * return value. If @p e is invalid, the results are undefined.
 *
 * Example:
 * @code
 * extern Evas *evas;
 * extern int screen_x;
 * Evas_Coord canvas_x;
 *
 * canvas_x = evas_coord_screen_x_to_world(evas, screen_x);
 * @endcode
 */
EAPI Evas_Coord        evas_coord_screen_x_to_world(const Evas *e, int x) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Convert/scale an output screen co-ordinate into canvas co-ordinates
 *
 * @param e The pointer to the Evas Canvas
 * @param y The screen/output y co-ordinate
 * @return The screen co-ordinate translated to canvas unit co-ordinates
 * @ingroup Evas_Coord_Mapping_Group
 *
 * This function takes in a vertical co-ordinate as the @p y parameter
 * and converts it into canvas units, accounting for output size,
 * viewport size and location, returning it as the function return
 * value. If @p e is invalid, the results are undefined.
 *
 * Example:
 * @code
 * extern Evas *evas;
 * extern int screen_y;
 * Evas_Coord canvas_y;
 *
 * canvas_y = evas_coord_screen_y_to_world(evas, screen_y);
 * @endcode
 */
EAPI Evas_Coord        evas_coord_screen_y_to_world(const Evas *e, int y) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Convert/scale a canvas co-ordinate into output screen co-ordinates
 *
 * @param e The pointer to the Evas Canvas
 * @param x The canvas x co-ordinate
 * @return The output/screen co-ordinate translated to output co-ordinates
 * @ingroup Evas_Coord_Mapping_Group
 *
 * This function takes in a horizontal co-ordinate as the @p x
 * parameter and converts it into output units, accounting for output
 * size, viewport size and location, returning it as the function
 * return value. If @p e is invalid, the results are undefined.
 *
 * Example:
 * @code
 * extern Evas *evas;
 * int screen_x;
 * extern Evas_Coord canvas_x;
 *
 * screen_x = evas_coord_world_x_to_screen(evas, canvas_x);
 * @endcode
 */
EAPI int               evas_coord_world_x_to_screen(const Evas *e, Evas_Coord x) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Convert/scale a canvas co-ordinate into output screen co-ordinates
 *
 * @param e The pointer to the Evas Canvas
 * @param y The canvas y co-ordinate
 * @return The output/screen co-ordinate translated to output co-ordinates
 * @ingroup Evas_Coord_Mapping_Group
 *
 * This function takes in a vertical co-ordinate as the @p x parameter
 * and converts it into output units, accounting for output size,
 * viewport size and location, returning it as the function return
 * value. If @p e is invalid, the results are undefined.
 *
 * Example:
 * @code
 * extern Evas *evas;
 * int screen_y;
 * extern Evas_Coord canvas_y;
 *
 * screen_y = evas_coord_world_y_to_screen(evas, canvas_y);
 * @endcode
 */
EAPI int               evas_coord_world_y_to_screen(const Evas *e, Evas_Coord y) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * @defgroup Evas_Pointer_Group Pointer (Mouse) Functions
 *
 * Functions that deal with the status of the pointer (mouse cursor).
 *
 * @ingroup Evas_Canvas
 */

/**
 * This function returns the current known pointer co-ordinates
 *
 * @param e The pointer to the Evas Canvas
 * @param x The pointer to an integer to be filled in
 * @param y The pointer to an integer to be filled in
 * @ingroup Evas_Pointer_Group
 *
 * This function returns the current known screen/output co-ordinates
 * of the mouse pointer and sets the contents of the integers pointed
 * to by @p x and @p y to contain these co-ordinates. If @p e is not a
 * valid canvas the results of this function are undefined.
 *
 * Example:
 * @code
 * extern Evas *evas;
 * int mouse_x, mouse_y;
 *
 * evas_pointer_output_xy_get(evas, &mouse_x, &mouse_y);
 * printf("Mouse is at screen position %i, %i\n", mouse_x, mouse_y);
 * @endcode
 */
EAPI void              evas_pointer_output_xy_get(const Evas *e, int *x, int *y) EINA_ARG_NONNULL(1);

/**
 * This function returns the current known pointer co-ordinates
 *
 * @param e The pointer to the Evas Canvas
 * @param x The pointer to a Evas_Coord to be filled in
 * @param y The pointer to a Evas_Coord to be filled in
 * @ingroup Evas_Pointer_Group
 *
 * This function returns the current known canvas unit co-ordinates of
 * the mouse pointer and sets the contents of the Evas_Coords pointed
 * to by @p x and @p y to contain these co-ordinates. If @p e is not a
 * valid canvas the results of this function are undefined.
 *
 * Example:
 * @code
 * extern Evas *evas;
 * Evas_Coord mouse_x, mouse_y;
 *
 * evas_pointer_output_xy_get(evas, &mouse_x, &mouse_y);
 * printf("Mouse is at canvas position %d, %d\n", mouse_x, mouse_y);
 * @endcode
 */
EAPI void              evas_pointer_canvas_xy_get(const Evas *e, Evas_Coord *x, Evas_Coord *y) EINA_ARG_NONNULL(1);

/**
 * Returns a bitmask with the mouse buttons currently pressed, set to 1
 *
 * @param e The pointer to the Evas Canvas
 * @return A bitmask of the currently depressed buttons on the canvas
 * @ingroup Evas_Pointer_Group
 *
 * Calling this function will return a 32-bit integer with the
 * appropriate bits set to 1 that correspond to a mouse button being
 * depressed. This limits Evas to a mouse devices with a maximum of 32
 * buttons, but that is generally in excess of any host system's
 * pointing device abilities.
 *
 * A canvas by default begins with no mouse buttons being pressed and
 * only calls to evas_event_feed_mouse_down(),
 * evas_event_feed_mouse_down_data(), evas_event_feed_mouse_up() and
 * evas_event_feed_mouse_up_data() will alter that.
 *
 * The least significant bit corresponds to the first mouse button
 * (button 1) and the most significant bit corresponds to the last
 * mouse button (button 32).
 *
 * If @p e is not a valid canvas, the return value is undefined.
 *
 * Example:
 * @code
 * extern Evas *evas;
 * int button_mask, i;
 *
 * button_mask = evas_pointer_button_down_mask_get(evas);
 * printf("Buttons currently pressed:\n");
 * for (i = 0; i < 32; i++)
 *   {
 *     if ((button_mask & (1 << i)) != 0) printf("Button %i\n", i + 1);
 *   }
 * @endcode
 */
EAPI int               evas_pointer_button_down_mask_get(const Evas *e) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Returns whether the mouse pointer is logically inside the canvas
 *
 * @param e The pointer to the Evas Canvas
 * @return An integer that is 1 if the mouse is inside the canvas, 0 otherwise
 * @ingroup Evas_Pointer_Group
 *
 * When this function is called it will return a value of either 0 or
 * 1, depending on if evas_event_feed_mouse_in(),
 * evas_event_feed_mouse_in_data(), or evas_event_feed_mouse_out(),
 * evas_event_feed_mouse_out_data() have been called to feed in a
 * mouse enter event into the canvas.
 *
 * A return value of 1 indicates the mouse is logically inside the
 * canvas, and 0 implies it is logically outside the canvas.
 *
 * A canvas begins with the mouse being assumed outside (0).
 *
 * If @p e is not a valid canvas, the return value is undefined.
 *
 * Example:
 * @code
 * extern Evas *evas;
 *
 * if (evas_pointer_inside_get(evas)) printf("Mouse is in!\n");
 * else printf("Mouse is out!\n");
 * @endcode
 */
EAPI Eina_Bool         evas_pointer_inside_get(const Evas *e) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

EAPI void              evas_sync(Evas *e) EINA_ARG_NONNULL(1);

/**
 * @}
 */

/**
 * @ingroup Evas_Canvas_Events
 *
 * @{
 */

/**
 * Add (register) a callback function to a given canvas event.
 *
 * @param e Canvas to attach a callback to
 * @param type The type of event that will trigger the callback
 * @param func The (callback) function to be called when the event is
 *        triggered
 * @param data The data pointer to be passed to @p func
 *
 * This function adds a function callback to the canvas @p e when the
 * event of type @p type occurs on it. The function pointer is @p
 * func.
 *
 * In the event of a memory allocation error during the addition of
 * the callback to the canvas, evas_alloc_error() should be used to
 * determine the nature of the error, if any, and the program should
 * sensibly try and recover.
 *
 * A callback function must have the ::Evas_Event_Cb prototype
 * definition. The first parameter (@p data) in this definition will
 * have the same value passed to evas_event_callback_add() as the @p
 * data parameter, at runtime. The second parameter @p e is the canvas
 * pointer on which the event occurred. The third parameter @p
 * event_info is a pointer to a data structure that may or may not be
 * passed to the callback, depending on the event type that triggered
 * the callback. This is so because some events don't carry extra
 * context with them, but others do.
 *
 * The event type @p type to trigger the function may be one of
 * #EVAS_CALLBACK_RENDER_FLUSH_PRE, #EVAS_CALLBACK_RENDER_FLUSH_POST,
 * #EVAS_CALLBACK_CANVAS_FOCUS_IN, #EVAS_CALLBACK_CANVAS_FOCUS_OUT,
 * #EVAS_CALLBACK_CANVAS_OBJECT_FOCUS_IN and
 * #EVAS_CALLBACK_CANVAS_OBJECT_FOCUS_OUT. This determines the kind of
 * event that will trigger the callback to be called. Only the last
 * two of the event types listed here provide useful event information
 * data -- a pointer to the recently focused Evas object. For the
 * others the @p event_info pointer is going to be @c NULL.
 *
 * Example:
 * @dontinclude evas-events.c
 * @skip evas_event_callback_add(d.canvas, EVAS_CALLBACK_RENDER_FLUSH_PRE
 * @until two canvas event callbacks
 *
 * Looking to the callbacks registered above,
 * @dontinclude evas-events.c
 * @skip called when our rectangle gets focus
 * @until let's have our events back
 *
 * we see that the canvas flushes its rendering pipeline
 * (#EVAS_CALLBACK_RENDER_FLUSH_PRE) whenever the @c _resize_cb
 * routine takes place: it has to redraw that image at a different
 * size. Also, the callback on an object being focused comes just
 * after we focus it explicitly, on code.
 *
 * See the full @ref Example_Evas_Events "example".
 *
 * @note Be careful not to add the same callback multiple times, if
 * that's not what you want, because Evas won't check if a callback
 * existed before exactly as the one being registered (and thus, call
 * it more than once on the event, in this case). This would make
 * sense if you passed different functions and/or callback data, only.
 */
EAPI void  evas_event_callback_add(Evas *e, Evas_Callback_Type type, Evas_Event_Cb func, const void *data) EINA_ARG_NONNULL(1, 3);

/**
 * Add (register) a callback function to a given canvas event with a
 * non-default priority set. Except for the priority field, it's exactly the
 * same as @ref evas_event_callback_add
 *
 * @param e Canvas to attach a callback to
 * @param type The type of event that will trigger the callback
 * @param priority The priority of the callback, lower values called first.
 * @param func The (callback) function to be called when the event is
 *        triggered
 * @param data The data pointer to be passed to @p func
 *
 * @see evas_event_callback_add
 * @since 1.1
 */
EAPI void  evas_event_callback_priority_add(Evas *e, Evas_Callback_Type type, Evas_Callback_Priority priority, Evas_Event_Cb func, const void *data) EINA_ARG_NONNULL(1, 4);

/**
 * Delete a callback function from the canvas.
 *
 * @param e Canvas to remove a callback from
 * @param type The type of event that was triggering the callback
 * @param func The function that was to be called when the event was triggered
 * @return The data pointer that was to be passed to the callback
 *
 * This function removes the most recently added callback from the
 * canvas @p e which was triggered by the event type @p type and was
 * calling the function @p func when triggered. If the removal is
 * successful it will also return the data pointer that was passed to
 * evas_event_callback_add() when the callback was added to the
 * canvas. If not successful @c NULL will be returned.
 *
 * Example:
 * @code
 * extern Evas *e;
 * void *my_data;
 * void focus_in_callback(void *data, Evas *e, void *event_info);
 *
 * my_data = evas_event_callback_del(ebject, EVAS_CALLBACK_CANVAS_FOCUS_IN, focus_in_callback);
 * @endcode
 */
EAPI void *evas_event_callback_del(Evas *e, Evas_Callback_Type type, Evas_Event_Cb func) EINA_ARG_NONNULL(1, 3);

/**
 * Delete (unregister) a callback function registered to a given
 * canvas event.
 *
 * @param e Canvas to remove an event callback from
 * @param type The type of event that was triggering the callback
 * @param func The function that was to be called when the event was
 *        triggered
 * @param data The data pointer that was to be passed to the callback
 * @return The data pointer that was to be passed to the callback
 *
 * This function removes <b>the first</b> added callback from the
 * canvas @p e matching the event type @p type, the registered
 * function pointer @p func and the callback data pointer @p data. If
 * the removal is successful it will also return the data pointer that
 * was passed to evas_event_callback_add() (that will be the same as
 * the parameter) when the callback(s) was(were) added to the
 * canvas. If not successful @c NULL will be returned. A common use
 * would be to remove an exact match of a callback.
 *
 * Example:
 * @dontinclude evas-events.c
 * @skip evas_event_callback_del_full(evas, EVAS_CALLBACK_RENDER_FLUSH_PRE,
 * @until _object_focus_in_cb, NULL);
 *
 * See the full @ref Example_Evas_Events "example".
 *
 * @note For deletion of canvas events callbacks filtering by just
 * type and function pointer, user evas_event_callback_del().
 */
EAPI void *evas_event_callback_del_full(Evas *e, Evas_Callback_Type type, Evas_Event_Cb func, const void *data) EINA_ARG_NONNULL(1, 3);

/**
 * Push a callback on the post-event callback stack
 *
 * @param e Canvas to push the callback on
 * @param func The function that to be called when the stack is unwound
 * @param data The data pointer to be passed to the callback
 *
 * Evas has a stack of callbacks that get called after all the callbacks for
 * an event have triggered (all the objects it triggers on and all the callbacks
 * in each object triggered). When all these have been called, the stack is
 * unwond from most recently to least recently pushed item and removed from the
 * stack calling the callback set for it.
 *
 * This is intended for doing reverse logic-like processing, example - when a
 * child object that happens to get the event later is meant to be able to
 * "steal" functions from a parent and thus on unwind of this stack have its
 * function called first, thus being able to set flags, or return 0 from the
 * post-callback that stops all other post-callbacks in the current stack from
 * being called (thus basically allowing a child to take control, if the event
 * callback prepares information ready for taking action, but the post callback
 * actually does the action).
 *
 */
EAPI void  evas_post_event_callback_push(Evas *e, Evas_Object_Event_Post_Cb func, const void *data);

/**
 * Remove a callback from the post-event callback stack
 *
 * @param e Canvas to push the callback on
 * @param func The function that to be called when the stack is unwound
 *
 * This removes a callback from the stack added with
 * evas_post_event_callback_push(). The first instance of the function in
 * the callback stack is removed from being executed when the stack is
 * unwound. Further instances may still be run on unwind.
 */
EAPI void  evas_post_event_callback_remove(Evas *e, Evas_Object_Event_Post_Cb func);

/**
 * Remove a callback from the post-event callback stack
 *
 * @param e Canvas to push the callback on
 * @param func The function that to be called when the stack is unwound
 * @param data The data pointer to be passed to the callback
 *
 * This removes a callback from the stack added with
 * evas_post_event_callback_push(). The first instance of the function and data
 * in the callback stack is removed from being executed when the stack is
 * unwound. Further instances may still be run on unwind.
 */
EAPI void  evas_post_event_callback_remove_full(Evas *e, Evas_Object_Event_Post_Cb func, const void *data);

/**
 * @}
 */

/**
 * @ingroup Evas_Event_Feeding_Group
 *
 * @{
 */

/**
 * Set the default set of flags an event begins with
 *
 * @param e The canvas to set the default event flags of
 * @param flags The default flags to use
 *
 * Events in evas can have an event_flags member. This starts out with
 * and initial value (no flags). This lets you set the default flags that
 * an event begins with to be @p flags
 *
 * @since 1.2
 */
EAPI void             evas_event_default_flags_set(Evas *e, Evas_Event_Flags flags) EINA_ARG_NONNULL(1);

/**
 * Get the default set of flags an event begins with
 *
 * @param e The canvas to get the default event flags from
 * @return The default event flags for that canvas
 *
 * This gets the default event flags events are produced with when fed in.
 *
 * @see evas_event_default_flags_set()
 * @since 1.2
 */
EAPI Evas_Event_Flags evas_event_default_flags_get(const Evas *e) EINA_ARG_NONNULL(1);

/**
 * Freeze all input events processing.
 *
 * @param e The canvas to freeze input events processing on.
 *
 * This function will indicate to Evas that the canvas @p e is to have
 * all input event processing frozen until a matching
 * evas_event_thaw() function is called on the same canvas. All events
 * of this kind during the freeze will get @b discarded. Every freeze
 * call must be matched by a thaw call in order to completely thaw out
 * a canvas (i.e. these calls may be nested). The most common use is
 * when you don't want the user to interact with your user interface
 * when you're populating a view or changing the layout.
 *
 * Example:
 * @dontinclude evas-events.c
 * @skip freeze input for 3 seconds
 * @until }
 * @dontinclude evas-events.c
 * @skip let's have our events back
 * @until }
 *
 * See the full @ref Example_Evas_Events "example".
 *
 * If you run that example, you'll see the canvas ignoring all input
 * events for 3 seconds, when the "f" key is pressed. In a more
 * realistic code we would be freezing while a toolkit or Edje was
 * doing some UI changes, thawing it back afterwards.
 */
EAPI void             evas_event_freeze(Evas *e) EINA_ARG_NONNULL(1);

/**
 * Thaw a canvas out after freezing (for input events).
 *
 * @param e The canvas to thaw out.
 *
 * This will thaw out a canvas after a matching evas_event_freeze()
 * call. If this call completely thaws out a canvas, i.e., there's no
 * other unbalanced call to evas_event_freeze(), events will start to
 * be processed again, but any "missed" events will @b not be
 * evaluated.
 *
 * See evas_event_freeze() for an example.
 */
EAPI void             evas_event_thaw(Evas *e) EINA_ARG_NONNULL(1);

/**
 * Return the freeze count on input events of a given canvas.
 *
 * @param e The canvas to fetch the freeze count from.
 *
 * This returns the number of times the canvas has been told to freeze
 * input events. It is possible to call evas_event_freeze() multiple
 * times, and these must be matched by evas_event_thaw() calls. This
 * call allows the program to discover just how many times things have
 * been frozen in case it may want to break out of a deep freeze state
 * where the count is high.
 *
 * Example:
 * @code
 * extern Evas *evas;
 *
 * while (evas_event_freeze_get(evas) > 0) evas_event_thaw(evas);
 * @endcode
 *
 */
EAPI int              evas_event_freeze_get(const Evas *e) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * After thaw of a canvas, re-evaluate the state of objects and call callbacks
 *
 * @param e The canvas to evaluate after a thaw
 *
 * This is normally called after evas_event_thaw() to re-evaluate mouse
 * containment and other states and thus also call callbacks for mouse in and
 * out on new objects if the state change demands it.
 */
EAPI void             evas_event_thaw_eval(Evas *e) EINA_ARG_NONNULL(1);
/**
 * @}
 */

/**
 * @ingroup Evas_Event_Feeding_Group
 *
 * @{
 */

/**
 * Get the number of mouse or multi presses currently active
 *
 * @p e The given canvas pointer.
 * @return The number of presses (0 if none active).
 *
 * @since 1.2
 */
EAPI int  evas_event_down_count_get(const Evas *e) EINA_ARG_NONNULL(1);

/**
 * Mouse down event feed.
 *
 * @param e The given canvas pointer.
 * @param b The button number.
 * @param flags The evas button flags.
 * @param timestamp The timestamp of the mouse down event.
 * @param data The data for canvas.
 *
 * This function will set some evas properties that is necessary when
 * the mouse button is pressed. It prepares information to be treated
 * by the callback function.
 *
 */
EAPI void evas_event_feed_mouse_down(Evas *e, int b, Evas_Button_Flags flags, unsigned int timestamp, const void *data) EINA_ARG_NONNULL(1);

/**
 * Mouse up event feed.
 *
 * @param e The given canvas pointer.
 * @param b The button number.
 * @param flags evas button flags.
 * @param timestamp The timestamp of the mouse up event.
 * @param data The data for canvas.
 *
 * This function will set some evas properties that is necessary when
 * the mouse button is released. It prepares information to be treated
 * by the callback function.
 *
 */
EAPI void evas_event_feed_mouse_up(Evas *e, int b, Evas_Button_Flags flags, unsigned int timestamp, const void *data) EINA_ARG_NONNULL(1);

/**
 * Mouse move event feed from input.
 *
 * @param e The given canvas pointer.
 * @param x The horizontal position of the mouse pointer relative to the 0,0 of
 * the window/surface.
 * @param y The vertical position of the mouse pointer relative to the 0,0 of
 * the window/surface.
 * @param timestamp The timestamp of the mouse move event.
 * @param data The data for canvas.
 *
 * Similar to the evas_event_feed_mouse_move(), this function will inform Evas
 * about mouse move events which were received by the input system, relative to
 * the 0,0 of the window, not to the canvas 0,0. It will take care of doing any
 * special transformation like adding the framespace offset to the mouse event.
 *
 * @since 1.8
 * @see evas_event_feed_mouse_move
 */
EAPI void evas_event_input_mouse_move(Evas *e, int x, int y, unsigned int timestamp, const void *data) EINA_ARG_NONNULL(1);

/**
 * Mouse move event feed.
 *
 * @param e The given canvas pointer.
 * @param x The horizontal position of the mouse pointer.
 * @param y The vertical position of the mouse pointer.
 * @param timestamp The timestamp of the mouse up event.
 * @param data The data for canvas.
 *
 * This function will set some evas properties that is necessary when
 * the mouse is moved from its last position. It prepares information
 * to be treated by the callback function.
 *
 */
EAPI void evas_event_feed_mouse_move(Evas *e, int x, int y, unsigned int timestamp, const void *data) EINA_ARG_NONNULL(1);

/**
 * Mouse in event feed.
 *
 * @param e The given canvas pointer.
 * @param timestamp The timestamp of the mouse up event.
 * @param data The data for canvas.
 *
 * This function will set some evas properties that is necessary when
 * the mouse in event happens. It prepares information to be treated
 * by the callback function.
 *
 */
EAPI void evas_event_feed_mouse_in(Evas *e, unsigned int timestamp, const void *data) EINA_ARG_NONNULL(1);

/**
 * Mouse out event feed.
 *
 * @param e The given canvas pointer.
 * @param timestamp Timestamp of the mouse up event.
 * @param data The data for canvas.
 *
 * This function will set some evas properties that is necessary when
 * the mouse out event happens. It prepares information to be treated
 * by the callback function.
 *
 */
EAPI void evas_event_feed_mouse_out(Evas *e, unsigned int timestamp, const void *data) EINA_ARG_NONNULL(1);

EAPI void evas_event_feed_multi_down(Evas *e, int d, int x, int y, double rad, double radx, double rady, double pres, double ang, double fx, double fy, Evas_Button_Flags flags, unsigned int timestamp, const void *data);
EAPI void evas_event_feed_multi_up(Evas *e, int d, int x, int y, double rad, double radx, double rady, double pres, double ang, double fx, double fy, Evas_Button_Flags flags, unsigned int timestamp, const void *data);
EAPI void evas_event_feed_multi_move(Evas *e, int d, int x, int y, double rad, double radx, double rady, double pres, double ang, double fx, double fy, unsigned int timestamp, const void *data);

EAPI void evas_event_input_multi_down(Evas *e, int d, int x, int y, double rad, double radx, double rady, double pres, double ang, double fx, double fy, Evas_Button_Flags flags, unsigned int timestamp, const void *data);
EAPI void evas_event_input_multi_up(Evas *e, int d, int x, int y, double rad, double radx, double rady, double pres, double ang, double fx, double fy, Evas_Button_Flags flags, unsigned int timestamp, const void *data);
EAPI void evas_event_input_multi_move(Evas *e, int d, int x, int y, double rad, double radx, double rady, double pres, double ang, double fx, double fy, unsigned int timestamp, const void *data);
/**
 * Mouse cancel event feed.
 *
 * @param e The given canvas pointer.
 * @param timestamp The timestamp of the mouse up event.
 * @param data The data for canvas.
 *
 * This function will call evas_event_feed_mouse_up() when a
 * mouse cancel event happens.
 *
 */
EAPI void evas_event_feed_mouse_cancel(Evas *e, unsigned int timestamp, const void *data) EINA_ARG_NONNULL(1);

/**
 * Mouse wheel event feed.
 *
 * @param e The given canvas pointer.
 * @param direction The wheel mouse direction.
 * @param z How much mouse wheel was scrolled up or down.
 * @param timestamp The timestamp of the mouse up event.
 * @param data The data for canvas.
 *
 * This function will set some evas properties that is necessary when
 * the mouse wheel is scrolled up or down. It prepares information to
 * be treated by the callback function.
 *
 */
EAPI void evas_event_feed_mouse_wheel(Evas *e, int direction, int z, unsigned int timestamp, const void *data) EINA_ARG_NONNULL(1);

/**
 * Key down event feed
 *
 * @param e The canvas to thaw out
 * @param keyname  Name of the key
 * @param key The key pressed.
 * @param string A String
 * @param compose The compose string
 * @param timestamp Timestamp of the mouse up event
 * @param data Data for canvas.
 *
 * This function will set some evas properties that is necessary when
 * a key is pressed. It prepares information to be treated by the
 * callback function.
 *
 */
EAPI void evas_event_feed_key_down(Evas *e, const char *keyname, const char *key, const char *string, const char *compose, unsigned int timestamp, const void *data) EINA_ARG_NONNULL(1);

/**
 * Key up event feed
 *
 * @param e The canvas to thaw out
 * @param keyname  Name of the key
 * @param key The key released.
 * @param string string
 * @param compose compose
 * @param timestamp Timestamp of the mouse up event
 * @param data Data for canvas.
 *
 * This function will set some evas properties that is necessary when
 * a key is released. It prepares information to be treated by the
 * callback function.
 *
 */
EAPI void evas_event_feed_key_up(Evas *e, const char *keyname, const char *key, const char *string, const char *compose, unsigned int timestamp, const void *data) EINA_ARG_NONNULL(1);

/**
 * Hold event feed
 *
 * @param e The given canvas pointer.
 * @param hold The hold.
 * @param timestamp The timestamp of the mouse up event.
 * @param data The data for canvas.
 *
 * This function makes the object to stop sending events.
 *
 */
EAPI void evas_event_feed_hold(Evas *e, int hold, unsigned int timestamp, const void *data) EINA_ARG_NONNULL(1);

/**
 * Re feed event.
 *
 * @param e The given canvas pointer.
 * @param event_copy the event to refeed
 * @param event_type Event type
 *
 * This function re-feeds the event pointed by event_copy
 *
 * This function call evas_event_feed_* functions, so it can
 * cause havoc if not used wisely. Please use it responsibly.
 */
EAPI void evas_event_refeed_event(Evas *e, void *event_copy, Evas_Callback_Type event_type) EINA_ARG_NONNULL(1);

/**
 * Retrieve a list of Evas objects lying over a given position in
 * a canvas.
 *
 * @param e A handle to the canvas.
 * @param stop An Evas Object where to stop searching.
 * @param x The horizontal coordinate of the position.
 * @param y The vertical coordinate of the position.
 *
 * This function will traverse all the layers of the given canvas,
 * from top to bottom, querying for objects with areas covering the
 * given position. It will enter the smart objects.
 * It will not append to the list pass events as hidden objects.
 * Call eina_list_free on the returned list after usage.
 *
 */
EAPI Eina_List *evas_tree_objects_at_xy_get(Evas *e, Evas_Object *stop, int x, int y) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * @}
 */

/**
 * @ingroup Evas_Image_Group
 *
 * @{
 */

/**
 * Flush the image cache of the canvas.
 *
 * @param e The given evas pointer.
 *
 * This function flushes image cache of canvas.
 *
 */
EAPI void      evas_image_cache_flush(Evas *e) EINA_ARG_NONNULL(1);

/**
 * Reload the image cache
 *
 * @param e The given evas pointer.
 *
 * This function reloads the image cache of canvas.
 *
 */
EAPI void      evas_image_cache_reload(Evas *e) EINA_ARG_NONNULL(1);

/**
 * Set the image cache.
 *
 * @param e The given evas pointer.
 * @param size The cache size.
 *
 * This function sets the image cache of canvas in bytes.
 *
 */
EAPI void      evas_image_cache_set(Evas *e, int size) EINA_ARG_NONNULL(1);

/**
 * Get the image cache
 *
 * @param e The given evas pointer.
 *
 * This function returns the image cache size of canvas in bytes.
 *
 */
EAPI int       evas_image_cache_get(const Evas *e) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Get the maximum image size evas can possibly handle
 *
 * @param e The given evas pointer.
 * @param maxw Pointer to hold the return value in pixels of the maximum width
 * @param maxh Pointer to hold the return value in pixels of the maximum height
 *
 * This function returns the larges image or surface size that evas can handle
 * in pixels, and if there is one, returns @c EINA_TRUE. It returns
 * @c EINA_FALSE if no extra constraint on maximum image size exists. You still
 * should check the return values of @p maxw and @p maxh as there may still be
 * a limit, just a much higher one.
 *
 * @since 1.1
 */
EAPI Eina_Bool evas_image_max_size_get(const Evas *e, int *maxw, int *maxh) EINA_ARG_NONNULL(1);
/**
 * @}
 */

/**
 * @ingroup Evas_Font_Group
 *
 * @{
 */

/**
 * Changes the font hinting for the given evas.
 *
 * @param e The given evas.
 * @param hinting The hinting to use, one of #EVAS_FONT_HINTING_NONE,
 *        #EVAS_FONT_HINTING_AUTO, #EVAS_FONT_HINTING_BYTECODE.
 * @ingroup Evas_Font_Group
 */
EAPI void                    evas_font_hinting_set(Evas *e, Evas_Font_Hinting_Flags hinting) EINA_ARG_NONNULL(1);

/**
 * Retrieves the font hinting used by the given evas.
 *
 * @param e The given evas to query.
 * @return The hinting in use, one of #EVAS_FONT_HINTING_NONE,
 *         #EVAS_FONT_HINTING_AUTO, #EVAS_FONT_HINTING_BYTECODE.
 * @ingroup Evas_Font_Group
 */
EAPI Evas_Font_Hinting_Flags evas_font_hinting_get(const Evas *e) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Checks if the font hinting is supported by the given evas.
 *
 * @param e The given evas to query.
 * @param hinting The hinting to use, one of #EVAS_FONT_HINTING_NONE,
 *        #EVAS_FONT_HINTING_AUTO, #EVAS_FONT_HINTING_BYTECODE.
 * @return @c EINA_TRUE if it is supported, @c EINA_FALSE otherwise.
 * @ingroup Evas_Font_Group
 */
EAPI Eina_Bool               evas_font_hinting_can_hint(const Evas *e, Evas_Font_Hinting_Flags hinting) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Force the given evas and associated engine to flush its font cache.
 *
 * @param e The given evas to flush font cache.
 * @ingroup Evas_Font_Group
 */
EAPI void                    evas_font_cache_flush(Evas *e) EINA_ARG_NONNULL(1);

/**
 * Changes the size of font cache of the given evas.
 *
 * @param e The given evas to flush font cache.
 * @param size The size, in bytes.
 *
 * @ingroup Evas_Font_Group
 */
EAPI void                    evas_font_cache_set(Evas *e, int size) EINA_ARG_NONNULL(1);

/**
 * Changes the size of font cache of the given evas.
 *
 * @param e The given evas to flush font cache.
 * @return The size, in bytes.
 *
 * @ingroup Evas_Font_Group
 */
EAPI int                     evas_font_cache_get(const Evas *e) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * List of available font descriptions known or found by this evas.
 *
 * The list depends on Evas compile time configuration, such as
 * fontconfig support, and the paths provided at runtime as explained
 * in @ref Evas_Font_Path_Group.
 *
 * @param e The evas instance to query.
 * @return a newly allocated list of strings. Do not change the
 *         strings.  Be sure to call evas_font_available_list_free()
 *         after you're done.
 *
 * @ingroup Evas_Font_Group
 */
EAPI Eina_List              *evas_font_available_list(const Evas *e) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Free list of font descriptions returned by evas_font_dir_available_list().
 *
 * @param e The evas instance that returned such list.
 * @param available the list returned by evas_font_dir_available_list().
 *
 * @ingroup Evas_Font_Group
 */
EAPI void                    evas_font_available_list_free(Evas *e, Eina_List *available) EINA_ARG_NONNULL(1);

/**
 * @defgroup Evas_Font_Path_Group Font Path Functions
 *
 * Functions that edit the paths being used to load fonts.
 *
 * @ingroup Evas_Font_Group
 */

/**
 * Removes all font paths loaded into memory for the given evas.
 * @param   e The given evas.
 * @ingroup Evas_Font_Path_Group
 */
EAPI void                    evas_font_path_clear(Evas *e) EINA_ARG_NONNULL(1);

/**
 * Appends a font path to the list of font paths used by the given evas.
 * @param   e    The given evas.
 * @param   path The new font path.
 * @ingroup Evas_Font_Path_Group
 */
EAPI void                    evas_font_path_append(Evas *e, const char *path) EINA_ARG_NONNULL(1, 2);

/**
 * Prepends a font path to the list of font paths used by the given evas.
 * @param   e The given evas.
 * @param   path The new font path.
 * @ingroup Evas_Font_Path_Group
 */
EAPI void                    evas_font_path_prepend(Evas *e, const char *path) EINA_ARG_NONNULL(1, 2);

/**
 * Retrieves the list of font paths used by the given evas.
 * @param   e The given evas.
 * @return  The list of font paths used.
 * @ingroup Evas_Font_Path_Group
 */
EAPI const Eina_List        *evas_font_path_list(const Evas *e) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);
/**
 * @}
 */

/**
 * @ingroup Evas_Object_Group_Basic
 *
 * @{
 */

/**
 * Clip one object to another.
 *
 * @param obj The object to be clipped
 * @param clip The object to clip @p obj by
 *
 * This function will clip the object @p obj to the area occupied by
 * the object @p clip. This means the object @p obj will only be
 * visible within the area occupied by the clipping object (@p clip).
 *
 * The color of the object being clipped will be multiplied by the
 * color of the clipping one, so the resulting color for the former
 * will be <code>RESULT = (OBJ * CLIP) / (255 * 255)</code>, per color
 * element (red, green, blue and alpha).
 *
 * Clipping is recursive, so clipping objects may be clipped by
 * others, and their color will in term be multiplied. You may @b not
 * set up circular clipping lists (i.e. object 1 clips object 2, which
 * clips object 1): the behavior of Evas is undefined in this case.
 *
 * Objects which do not clip others are visible in the canvas as
 * normal; <b>those that clip one or more objects become invisible
 * themselves</b>, only affecting what they clip. If an object ceases
 * to have other objects being clipped by it, it will become visible
 * again.
 *
 * The visibility of an object affects the objects that are clipped by
 * it, so if the object clipping others is not shown (as in
 * evas_object_show()), the objects clipped by it will not be shown
 * either.
 *
 * If @p obj was being clipped by another object when this function is
 * called, it gets implicitly removed from the old clipper's domain
 * and is made now to be clipped by its new clipper.
 *
 * The following figure illustrates some clipping in Evas:
 *
 * @image html clipping.png
 * @image rtf clipping.png
 * @image latex clipping.eps
 *
 * @note At the moment the <b>only objects that can validly be used to
 * clip other objects are rectangle objects</b>. All other object
 * types are invalid and the result of using them is undefined. The
 * clip object @p clip must be a valid object, but can also be @c
 * NULL, in which case the effect of this function is the same as
 * calling evas_object_clip_unset() on the @p obj object.
 *
 * Example:
 * @dontinclude evas-object-manipulation.c
 * @skip solid white clipper (note that it's the default color for a
 * @until evas_object_show(d.clipper);
 *
 * See the full @ref Example_Evas_Object_Manipulation "example".
 */
EAPI void             evas_object_clip_set(Evas_Object *obj, Evas_Object *clip) EINA_ARG_NONNULL(1, 2);

/**
 * Get the object clipping @p obj (if any).
 *
 * @param obj The object to get the clipper from
 *
 * This function returns the object clipping @p obj. If @p obj is
 * not being clipped at all, @c NULL is returned. The object @p obj
 * must be a valid ::Evas_Object.
 *
 * See also evas_object_clip_set(), evas_object_clip_unset() and
 * evas_object_clipees_get().
 *
 * Example:
 * @dontinclude evas-object-manipulation.c
 * @skip if (evas_object_clip_get(d.img) == d.clipper)
 * @until return
 *
 * See the full @ref Example_Evas_Object_Manipulation "example".
 */
EAPI Evas_Object     *evas_object_clip_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Disable/cease clipping on a clipped @p obj object.
 *
 * @param obj The object to cease clipping on
 *
 * This function disables clipping for the object @p obj, if it was
 * already clipped, i.e., its visibility and color get detached from
 * the previous clipper. If it wasn't, this has no effect. The object
 * @p obj must be a valid ::Evas_Object.
 *
 * See also evas_object_clip_set() (for an example),
 * evas_object_clipees_get() and evas_object_clip_get().
 *
 */
EAPI void             evas_object_clip_unset(Evas_Object *obj);

/**
 * Return a list of objects currently clipped by @p obj.
 *
 * @param obj The object to get a list of clippees from
 * @return a list of objects being clipped by @p obj
 *
 * This returns the internal list handle that contains all objects
 * clipped by the object @p obj. If none are clipped by it, the call
 * returns @c NULL. This list is only valid until the clip list is
 * changed and should be fetched again with another call to
 * evas_object_clipees_get() if any objects being clipped by this
 * object are unclipped, clipped by a new object, deleted or get the
 * clipper deleted. These operations will invalidate the list
 * returned, so it should not be used anymore after that point. Any
 * use of the list after this may have undefined results, possibly
 * leading to crashes. The object @p obj must be a valid
 * ::Evas_Object.
 *
 * See also evas_object_clip_set(), evas_object_clip_unset() and
 * evas_object_clip_get().
 *
 * Example:
 * @code
 * extern Evas_Object *obj;
 * Evas_Object *clipper;
 *
 * clipper = evas_object_clip_get(obj);
 * if (clipper)
 *   {
 *     Eina_List *clippees, *l;
 *     Evas_Object *obj_tmp;
 *
 *     clippees = evas_object_clipees_get(clipper);
 *     printf("Clipper clips %i objects\n", eina_list_count(clippees));
 *     EINA_LIST_FOREACH(clippees, l, obj_tmp)
 *       evas_object_show(obj_tmp);
 *   }
 * @endcode
 */
EAPI const Eina_List *evas_object_clipees_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Test if any object is clipped by @p obj.
 *
 * @param obj The object to get a list of clippees from
 * @return EINA_TRUE if @p obj clip any object.
 * @since 1.8
 */
EAPI Eina_Bool evas_object_clipees_has(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Sets or unsets a given object as the currently focused one on its
 * canvas.
 *
 * @param obj The object to be focused or unfocused.
 * @param focus @c EINA_TRUE, to set it as focused or @c EINA_FALSE,
 * to take away the focus from it.
 *
 * Changing focus only affects where (key) input events go. There can
 * be only one object focused at any time. If @p focus is @c EINA_TRUE,
 * @p obj will be set as the currently focused object and it will
 * receive all keyboard events that are not exclusive key grabs on
 * other objects.
 *
 * Example:
 * @dontinclude evas-events.c
 * @skip evas_object_focus_set
 * @until evas_object_focus_set
 *
 * See the full example @ref Example_Evas_Events "here".
 *
 * @see evas_object_focus_get
 * @see evas_focus_get
 * @see evas_object_key_grab
 * @see evas_object_key_ungrab
 */
EAPI void             evas_object_focus_set(Evas_Object *obj, Eina_Bool focus) EINA_ARG_NONNULL(1);

/**
 * Retrieve whether an object has the focus.
 *
 * @param obj The object to retrieve focus information from.
 * @return @c EINA_TRUE if the object has the focus, @c EINA_FALSE otherwise.
 *
 * If the passed object is the currently focused one, @c EINA_TRUE is
 * returned. @c EINA_FALSE is returned, otherwise.
 *
 * Example:
 * @dontinclude evas-events.c
 * @skip And again
 * @until something is bad
 *
 * See the full example @ref Example_Evas_Events "here".
 *
 * @see evas_object_focus_set
 * @see evas_focus_get
 * @see evas_object_key_grab
 * @see evas_object_key_ungrab
 */
EAPI Eina_Bool        evas_object_focus_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Sets the layer of its canvas that the given object will be part of.
 *
 * @param   obj The given Evas object.
 * @param   l   The number of the layer to place the object on.
 *          Must be between #EVAS_LAYER_MIN and #EVAS_LAYER_MAX.
 *
 * If you don't use this function, you'll be dealing with an @b unique
 * layer of objects, the default one. Additional layers are handy when
 * you don't want a set of objects to interfere with another set with
 * regard to @b stacking. Two layers are completely disjoint in that
 * matter.
 *
 * This is a low-level function, which you'd be using when something
 * should be always on top, for example.
 *
 * @warning Be careful, it doesn't make sense to change the layer of
 * smart objects' children. Smart objects have a layer of their own,
 * which should contain all their children objects.
 *
 * @see evas_object_layer_get()
 */
EAPI void             evas_object_layer_set(Evas_Object *obj, short l) EINA_ARG_NONNULL(1);

/**
 * Retrieves the layer of its canvas that the given object is part of.
 *
 * @param   obj The given Evas object to query layer from
 * @return  Number of its layer
 *
 * @see evas_object_layer_set()
 */
EAPI short            evas_object_layer_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Sets the name of the given Evas object to the given name.
 *
 * @param   obj  The given object.
 * @param   name The given name.
 *
 * There might be occasions where one would like to name his/her
 * objects.
 *
 * Example:
 * @dontinclude evas-events.c
 * @skip d.bg = evas_object_rectangle_add(d.canvas);
 * @until evas_object_name_set(d.bg, "our dear rectangle");
 *
 * See the full @ref Example_Evas_Events "example".
 */
EAPI void             evas_object_name_set(Evas_Object *obj, const char *name) EINA_ARG_NONNULL(1);

/**
 * Retrieves the name of the given Evas object.
 *
 * @param   obj The given object.
 * @return  The name of the object or @c NULL, if no name has been given
 *          to it.
 *
 * Example:
 * @dontinclude evas-events.c
 * @skip fprintf(stdout, "An object got focused: %s\n",
 * @until evas_focus_get
 *
 * See the full @ref Example_Evas_Events "example".
 */
EAPI const char      *evas_object_name_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Increments object reference count to defer its deletion.
 *
 * @param obj The given Evas object to reference
 *
 * This increments the reference count of an object, which if greater
 * than 0 will defer deletion by evas_object_del() until all
 * references are released back (counter back to 0). References cannot
 * go below 0 and unreferencing past that will result in the reference
 * count being limited to 0. References are limited to <c>2^32 - 1</c>
 * for an object. Referencing it more than this will result in it
 * being limited to this value.
 *
 * @see evas_object_unref()
 * @see evas_object_del()
 *
 * @note This is a <b>very simple</b> reference counting mechanism! For
 * instance, Evas is not ready to check for pending references on a
 * canvas deletion, or things like that. This is useful on scenarios
 * where, inside a code block, callbacks exist which would possibly
 * delete an object we are operating on afterwards. Then, one would
 * evas_object_ref() it on the beginning of the block and
 * evas_object_unref() it on the end. It would then be deleted at this
 * point, if it should be.
 *
 * Example:
 * @code
 *  evas_object_ref(obj);
 *
 *  // action here...
 *  evas_object_smart_callback_call(obj, SIG_SELECTED, NULL);
 *  // more action here...
 *  evas_object_unref(obj);
 * @endcode
 *
 * @ingroup Evas_Object_Group_Basic
 * @since 1.1
 */
EAPI void             evas_object_ref(Evas_Object *obj);

/**
 * Decrements object reference count.
 *
 * @param obj The given Evas object to unreference
 *
 * This decrements the reference count of an object. If the object has
 * had evas_object_del() called on it while references were more than
 * 0, it will be deleted at the time this function is called and puts
 * the counter back to 0. See evas_object_ref() for more information.
 *
 * @see evas_object_ref() (for an example)
 * @see evas_object_del()
 *
 * @ingroup Evas_Object_Group_Basic
 * @since 1.1
 */
EAPI void             evas_object_unref(Evas_Object *obj);

/**
 * Get the object reference count.
 *
 * @param obj The given Evas object to query
 *
 * This gets the reference count for an object (normally 0 until it is
 * referenced). Values of 1 or greater mean that someone is holding a
 * reference to this object that needs to be unreffed before it can be
 * deleted.
 *
 * @see evas_object_ref()
 * @see evas_object_unref()
 * @see evas_object_del()
 *
 * @ingroup Evas_Object_Group_Basic
 * @since 1.2
 */
EAPI int              evas_object_ref_get(const Evas_Object *obj);

/**
 * Marks the given Evas object for deletion (when Evas will free its
 * memory).
 *
 * @param obj The given Evas object.
 *
 * This call will mark @p obj for deletion, which will take place
 * whenever it has no more references to it (see evas_object_ref() and
 * evas_object_unref()).
 *
 * At actual deletion time, which may or may not be just after this
 * call, ::EVAS_CALLBACK_DEL and ::EVAS_CALLBACK_FREE callbacks will
 * be called. If the object currently had the focus, its
 * ::EVAS_CALLBACK_FOCUS_OUT callback will also be called.
 *
 * @see evas_object_ref()
 * @see evas_object_unref()
 *
 * @ingroup Evas_Object_Group_Basic
 */
EAPI void             evas_object_del(Evas_Object *obj) EINA_ARG_NONNULL(1);

/**
 * Move the given Evas object to the given location inside its
 * canvas' viewport.
 *
 * @param obj The given Evas object.
 * @param x   X position to move the object to, in canvas units.
 * @param y   Y position to move the object to, in canvas units.
 *
 * Besides being moved, the object's ::EVAS_CALLBACK_MOVE callback
 * will be called.
 *
 * @note Naturally, newly created objects are placed at the canvas'
 * origin: <code>0, 0</code>.
 *
 * Example:
 * @dontinclude evas-object-manipulation.c
 * @skip evas_object_image_border_set(d.clipper_border, 3, 3, 3, 3);
 * @until evas_object_show
 *
 * See the full @ref Example_Evas_Object_Manipulation "example".
 *
 * @ingroup Evas_Object_Group_Basic
 */
EAPI void             evas_object_move(Evas_Object *obj, Evas_Coord x, Evas_Coord y) EINA_ARG_NONNULL(1);

/**
 * Changes the size of the given Evas object.
 *
 * @param obj The given Evas object.
 * @param w   The new width of the Evas object.
 * @param h   The new height of the Evas object.
 *
 * Besides being resized, the object's ::EVAS_CALLBACK_RESIZE callback
 * will be called.
 *
 * @note Newly created objects have zeroed dimensions. Then, you most
 * probably want to use evas_object_resize() on them after they are
 * created.
 *
 * @note Be aware that resizing an object changes its drawing area,
 * but that does imply the object is rescaled! For instance, images
 * are filled inside their drawing area using the specifications of
 * evas_object_image_fill_set(). Thus to scale the image to match
 * exactly your drawing area, you need to change the
 * evas_object_image_fill_set() as well.
 *
 * @note This is more evident in images, but text, textblock, lines
 * and polygons will behave similarly. Check their specific APIs to
 * know how to achieve your desired behavior. Consider the following
 * example:
 *
 * @code
 * // rescale image to fill exactly its area without tiling:
 * evas_object_resize(img, w, h);
 * evas_object_image_fill_set(img, 0, 0, w, h);
 * @endcode
 *
 * @ingroup Evas_Object_Group_Basic
 */
EAPI void             evas_object_resize(Evas_Object *obj, Evas_Coord w, Evas_Coord h) EINA_ARG_NONNULL(1);

/**
 * Retrieves the position and (rectangular) size of the given Evas
 * object.
 *
 * @param obj The given Evas object.
 * @param x Pointer to an integer in which to store the X coordinate
 *          of the object.
 * @param y Pointer to an integer in which to store the Y coordinate
 *          of the object.
 * @param w Pointer to an integer in which to store the width of the
 *          object.
 * @param h Pointer to an integer in which to store the height of the
 *          object.
 *
 * The position, naturally, will be relative to the top left corner of
 * the canvas' viewport.
 *
 * @note Use @c NULL pointers on the geometry components you're not
 * interested in: they'll be ignored by the function.
 *
 * Example:
 * @dontinclude evas-events.c
 * @skip int w, h, cw, ch;
 * @until return
 *
 * See the full @ref Example_Evas_Events "example".
 *
 * @ingroup Evas_Object_Group_Basic
 */
EAPI void             evas_object_geometry_get(const Evas_Object *obj, Evas_Coord *x, Evas_Coord *y, Evas_Coord *w, Evas_Coord *h) EINA_ARG_NONNULL(1);

/**
 * Set the position and (rectangular) size of the given Evas object.
 *
 * @param obj The given Evas object.
 * @param x   X position to move the object to, in canvas units.
 * @param y   Y position to move the object to, in canvas units.
 * @param w   The new width of the Evas object.
 * @param h   The new height of the Evas object.
 *
 * The position, naturally, will be relative to the top left corner of
 * the canvas' viewport.
 *
 * If the object get moved, the object's ::EVAS_CALLBACK_MOVE callback
 * will be called.
 *
 * If the object get resized, the object's ::EVAS_CALLBACK_RESIZE callback
 * will be called.
 *
 * @see evas_object_move()
 * @see evas_object_resize()
 * @see evas_object_geometry_get
 *
 * @since 1.8
 * @ingroup Evas_Object_Group_Basic
 */
EAPI void             evas_object_geometry_set(Evas_Object *obj, Evas_Coord x, Evas_Coord y, Evas_Coord w, Evas_Coord h) EINA_ARG_NONNULL(1);


/**
 * Makes the given Evas object visible.
 *
 * @param obj The given Evas object.
 *
 * Besides becoming visible, the object's ::EVAS_CALLBACK_SHOW
 * callback will be called.
 *
 * @see evas_object_hide() for more on object visibility.
 * @see evas_object_visible_get()
 *
 * @ingroup Evas_Object_Group_Basic
 */
EAPI void             evas_object_show(Evas_Object *obj) EINA_ARG_NONNULL(1);

/**
 * Makes the given Evas object invisible.
 *
 * @param obj The given Evas object.
 *
 * Hidden objects, besides not being shown at all in your canvas,
 * won't be checked for changes on the canvas rendering
 * process. Furthermore, they will not catch input events. Thus, they
 * are much ligher (in processing needs) than an object that is
 * invisible due to indirect causes, such as being clipped or out of
 * the canvas' viewport.
 *
 * Besides becoming hidden, @p obj object's ::EVAS_CALLBACK_SHOW
 * callback will be called.
 *
 * @note All objects are created in the hidden state! If you want them
 * shown, use evas_object_show() after their creation.
 *
 * @see evas_object_show()
 * @see evas_object_visible_get()
 *
 * Example:
 * @dontinclude evas-object-manipulation.c
 * @skip if (evas_object_visible_get(d.clipper))
 * @until return
 *
 * See the full @ref Example_Evas_Object_Manipulation "example".
 *
 * @ingroup Evas_Object_Group_Basic
 */
EAPI void             evas_object_hide(Evas_Object *obj) EINA_ARG_NONNULL(1);

/**
 * Retrieves whether or not the given Evas object is visible.
 *
 * @param   obj The given Evas object.
 * @return @c EINA_TRUE if the object is visible, @c EINA_FALSE
 * otherwise.
 *
 * This retrieves an object's visibility as the one enforced by
 * evas_object_show() and evas_object_hide().
 *
 * @note The value returned isn't, by any means, influenced by
 * clippers covering @p obj, it being out of its canvas' viewport or
 * stacked below other object.
 *
 * @see evas_object_show()
 * @see evas_object_hide() (for an example)
 *
 * @ingroup Evas_Object_Group_Basic
 */
EAPI Eina_Bool        evas_object_visible_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Sets the general/main color of the given Evas object to the given
 * one.
 *
 * @param obj The given Evas object.
 * @param r   The red component of the given color.
 * @param g   The green component of the given color.
 * @param b   The blue component of the given color.
 * @param a   The alpha component of the given color.
 *
 * @see evas_object_color_get() (for an example)
 * @note These color values are expected to be premultiplied by @p a.
 *
 * @ingroup Evas_Object_Group_Basic
 */
EAPI void             evas_object_color_set(Evas_Object *obj, int r, int g, int b, int a) EINA_ARG_NONNULL(1);

/**
 * Retrieves the general/main color of the given Evas object.
 *
 * @param obj The given Evas object to retrieve color from.
 * @param r Pointer to an integer in which to store the red component
 *          of the color.
 * @param g Pointer to an integer in which to store the green
 *          component of the color.
 * @param b Pointer to an integer in which to store the blue component
 *          of the color.
 * @param a Pointer to an integer in which to store the alpha
 *          component of the color.
 *
 * Retrieves the “main” color's RGB component (and alpha channel)
 * values, <b>which range from 0 to 255</b>. For the alpha channel,
 * which defines the object's transparency level, 0 means totally
 * transparent, while 255 means opaque. These color values are
 * premultiplied by the alpha value.
 *
 * Usually you’ll use this attribute for text and rectangle objects,
 * where the “main” color is their unique one. If set for objects
 * which themselves have colors, like the images one, those colors get
 * modulated by this one.
 *
 * @note All newly created Evas rectangles get the default color
 * values of <code>255 255 255 255</code> (opaque white).
 *
 * @note Use @c NULL pointers on the components you're not interested
 * in: they'll be ignored by the function.
 *
 * Example:
 * @dontinclude evas-object-manipulation.c
 * @skip int alpha, r, g, b;
 * @until return
 *
 * See the full @ref Example_Evas_Object_Manipulation "example".
 *
 * @ingroup Evas_Object_Group_Basic
 */
EAPI void             evas_object_color_get(const Evas_Object *obj, int *r, int *g, int *b, int *a) EINA_ARG_NONNULL(1);

/**
 * Retrieves the Evas canvas that the given object lives on.
 *
 * @param   obj The given Evas object.
 * @return  A pointer to the canvas where the object is on.
 *
 * This function is most useful at code contexts where you need to
 * operate on the canvas but have only the object pointer.
 *
 * @ingroup Evas_Object_Group_Basic
 */
EAPI Evas            *evas_object_evas_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Retrieves the type of the given Evas object.
 *
 * @param obj The given object.
 * @return The type of the object.
 *
 * For Evas' builtin types, the return strings will be one of:
 *   - <c>"rectangle"</c>,
 *   - <c>"line"</c>,
 *   - <c>"polygon"</c>,
 *   - <c>"text"</c>,
 *   - <c>"textblock"</c> and
 *   - <c>"image"</c>.
 *
 * For Evas smart objects (see @ref Evas_Smart_Group), the name of the
 * smart class itself is returned on this call. For the built-in smart
 * objects, these names are:
 *   - <c>"EvasObjectSmartClipped"</c>, for the clipped smart object
 *   - <c>"Evas_Object_Box"</c>, for the box object and
 *   - <c>"Evas_Object_Table"</c>, for the table object.
 *
 * Example:
 * @dontinclude evas-object-manipulation.c
 * @skip d.img = evas_object_image_filled_add(d.canvas);
 * @until border on the
 *
 * See the full @ref Example_Evas_Object_Manipulation "example".
 */
EAPI const char      *evas_object_type_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Raise @p obj to the top of its layer.
 *
 * @param obj the object to raise
 *
 * @p obj will, then, be the highest one in the layer it belongs
 * to. Object on other layers won't get touched.
 *
 * @see evas_object_stack_above()
 * @see evas_object_stack_below()
 * @see evas_object_lower()
 */
EAPI void             evas_object_raise(Evas_Object *obj) EINA_ARG_NONNULL(1);

/**
 * Lower @p obj to the bottom of its layer.
 *
 * @param obj the object to lower
 *
 * @p obj will, then, be the lowest one in the layer it belongs
 * to. Objects on other layers won't get touched.
 *
 * @see evas_object_stack_above()
 * @see evas_object_stack_below()
 * @see evas_object_raise()
 */
EAPI void             evas_object_lower(Evas_Object *obj) EINA_ARG_NONNULL(1);

/**
 * Stack @p obj immediately above @p above
 *
 * @param obj the object to stack
 * @param above the object above which to stack
 *
 * Objects, in a given canvas, are stacked in the order they get added
 * to it.  This means that, if they overlap, the highest ones will
 * cover the lowest ones, in that order. This function is a way to
 * change the stacking order for the objects.
 *
 * This function is intended to be used with <b>objects belonging to
 * the same layer</b> in a given canvas, otherwise it will fail (and
 * accomplish nothing).
 *
 * If you have smart objects on your canvas and @p obj is a member of
 * one of them, then @p above must also be a member of the same
 * smart object.
 *
 * Similarly, if @p obj is not a member of a smart object, @p above
 * must not be either.
 *
 * @see evas_object_layer_get()
 * @see evas_object_layer_set()
 * @see evas_object_stack_below()
 */
EAPI void             evas_object_stack_above(Evas_Object *obj, Evas_Object *above) EINA_ARG_NONNULL(1, 2);

/**
 * Stack @p obj immediately below @p below
 *
 * @param obj the object to stack
 * @param below the object below which to stack
 *
 * Objects, in a given canvas, are stacked in the order they get added
 * to it.  This means that, if they overlap, the highest ones will
 * cover the lowest ones, in that order. This function is a way to
 * change the stacking order for the objects.
 *
 * This function is intended to be used with <b>objects belonging to
 * the same layer</b> in a given canvas, otherwise it will fail (and
 * accomplish nothing).
 *
 * If you have smart objects on your canvas and @p obj is a member of
 * one of them, then @p below must also be a member of the same
 * smart object.
 *
 * Similarly, if @p obj is not a member of a smart object, @p below
 * must not be either.
 *
 * @see evas_object_layer_get()
 * @see evas_object_layer_set()
 * @see evas_object_stack_below()
 */
EAPI void             evas_object_stack_below(Evas_Object *obj, Evas_Object *below) EINA_ARG_NONNULL(1, 2);

/**
 * Get the Evas object stacked right above @p obj
 *
 * @param obj an #Evas_Object
 * @return the #Evas_Object directly above @p obj, if any, or @c NULL,
 * if none
 *
 * This function will traverse layers in its search, if there are
 * objects on layers above the one @p obj is placed at.
 *
 * @see evas_object_layer_get()
 * @see evas_object_layer_set()
 * @see evas_object_below_get()
 *
 */
EAPI Evas_Object     *evas_object_above_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Get the Evas object stacked right below @p obj
 *
 * @param obj an #Evas_Object
 * @return the #Evas_Object directly below @p obj, if any, or @c NULL,
 * if none
 *
 * This function will traverse layers in its search, if there are
 * objects on layers below the one @p obj is placed at.
 *
 * @see evas_object_layer_get()
 * @see evas_object_layer_set()
 * @see evas_object_below_get()
 */
EAPI Evas_Object     *evas_object_below_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);
/**
 * @}
 */

/**
 * @ingroup Evas_Object_Group_Events
 *
 * @{
 */

/**
 * Add (register) a callback function to a given Evas object event.
 *
 * @param obj Object to attach a callback to
 * @param type The type of event that will trigger the callback
 * @param func The function to be called when the event is triggered
 * @param data The data pointer to be passed to @p func
 *
 * This function adds a function callback to an object when the event
 * of type @p type occurs on object @p obj. The function is @p func.
 *
 * In the event of a memory allocation error during addition of the
 * callback to the object, evas_alloc_error() should be used to
 * determine the nature of the error, if any, and the program should
 * sensibly try and recover.
 *
 * A callback function must have the ::Evas_Object_Event_Cb prototype
 * definition. The first parameter (@p data) in this definition will
 * have the same value passed to evas_object_event_callback_add() as
 * the @p data parameter, at runtime. The second parameter @p e is the
 * canvas pointer on which the event occurred. The third parameter is
 * a pointer to the object on which event occurred. Finally, the
 * fourth parameter @p event_info is a pointer to a data structure
 * that may or may not be passed to the callback, depending on the
 * event type that triggered the callback. This is so because some
 * events don't carry extra context with them, but others do.
 *
 * The event type @p type to trigger the function may be one of
 * #EVAS_CALLBACK_MOUSE_IN, #EVAS_CALLBACK_MOUSE_OUT,
 * #EVAS_CALLBACK_MOUSE_DOWN, #EVAS_CALLBACK_MOUSE_UP,
 * #EVAS_CALLBACK_MOUSE_MOVE, #EVAS_CALLBACK_MOUSE_WHEEL,
 * #EVAS_CALLBACK_MULTI_DOWN, #EVAS_CALLBACK_MULTI_UP,
 * #EVAS_CALLBACK_MULTI_MOVE, #EVAS_CALLBACK_FREE,
 * #EVAS_CALLBACK_KEY_DOWN, #EVAS_CALLBACK_KEY_UP,
 * #EVAS_CALLBACK_FOCUS_IN, #EVAS_CALLBACK_FOCUS_OUT,
 * #EVAS_CALLBACK_SHOW, #EVAS_CALLBACK_HIDE, #EVAS_CALLBACK_MOVE,
 * #EVAS_CALLBACK_RESIZE, #EVAS_CALLBACK_RESTACK, #EVAS_CALLBACK_DEL,
 * #EVAS_CALLBACK_HOLD, #EVAS_CALLBACK_CHANGED_SIZE_HINTS,
 * #EVAS_CALLBACK_IMAGE_PRELOADED or #EVAS_CALLBACK_IMAGE_UNLOADED.
 *
 * This determines the kind of event that will trigger the callback.
 * What follows is a list explaining better the nature of each type of
 * event, along with their associated @p event_info pointers:
 *
 * - #EVAS_CALLBACK_MOUSE_IN: @p event_info is a pointer to an
 *   #Evas_Event_Mouse_In struct\n\n
 *   This event is triggered when the mouse pointer enters the area
 *   (not shaded by other objects) of the object @p obj. This may
 *   occur by the mouse pointer being moved by
 *   evas_event_feed_mouse_move() calls, or by the object being shown,
 *   raised, moved, resized, or other objects being moved out of the
 *   way, hidden or lowered, whatever may cause the mouse pointer to
 *   get on top of @p obj, having been on top of another object
 *   previously.
 *
 * - #EVAS_CALLBACK_MOUSE_OUT: @p event_info is a pointer to an
 *   #Evas_Event_Mouse_Out struct\n\n
 *   This event is triggered exactly like #EVAS_CALLBACK_MOUSE_IN is,
 *   but it occurs when the mouse pointer exits an object's area. Note
 *   that no mouse out events will be reported if the mouse pointer is
 *   implicitly grabbed to an object (mouse buttons are down, having
 *   been pressed while the pointer was over that object). In these
 *   cases, mouse out events will be reported once all buttons are
 *   released, if the mouse pointer has left the object's area. The
 *   indirect ways of taking off the mouse pointer from an object,
 *   like cited above, for #EVAS_CALLBACK_MOUSE_IN, also apply here,
 *   naturally.
 *
 * - #EVAS_CALLBACK_MOUSE_DOWN: @p event_info is a pointer to an
 *   #Evas_Event_Mouse_Down struct\n\n
 *   This event is triggered by a mouse button being pressed while the
 *   mouse pointer is over an object. If the pointer mode for Evas is
 *   #EVAS_OBJECT_POINTER_MODE_AUTOGRAB (default), this causes this
 *   object to <b>passively grab the mouse</b> until all mouse buttons
 *   have been released: all future mouse events will be reported to
 *   only this object until no buttons are down. That includes mouse
 *   move events, mouse in and mouse out events, and further button
 *   presses. When all buttons are released, event propagation will
 *   occur as normal (see #Evas_Object_Pointer_Mode).
 *
 * - #EVAS_CALLBACK_MOUSE_UP: @p event_info is a pointer to an
 *   #Evas_Event_Mouse_Up struct\n\n
 *   This event is triggered by a mouse button being released while
 *   the mouse pointer is over an object's area (or when passively
 *   grabbed to an object).
 *
 * - #EVAS_CALLBACK_MOUSE_MOVE: @p event_info is a pointer to an
 *   #Evas_Event_Mouse_Move struct\n\n
 *   This event is triggered by the mouse pointer being moved while
 *   over an object's area (or while passively grabbed to an object).
 *
 * - #EVAS_CALLBACK_MOUSE_WHEEL: @p event_info is a pointer to an
 *   #Evas_Event_Mouse_Wheel struct\n\n
 *   This event is triggered by the mouse wheel being rolled while the
 *   mouse pointer is over an object (or passively grabbed to an
 *   object).
 *
 * - #EVAS_CALLBACK_MULTI_DOWN: @p event_info is a pointer to an
 *   #Evas_Event_Multi_Down struct
 *
 * - #EVAS_CALLBACK_MULTI_UP: @p event_info is a pointer to an
 *   #Evas_Event_Multi_Up struct
 *
 * - #EVAS_CALLBACK_MULTI_MOVE: @p event_info is a pointer to an
 *   #Evas_Event_Multi_Move struct
 *
 * - #EVAS_CALLBACK_FREE: @p event_info is @c NULL \n\n
 *   This event is triggered just before Evas is about to free all
 *   memory used by an object and remove all references to it. This is
 *   useful for programs to use if they attached data to an object and
 *   want to free it when the object is deleted. The object is still
 *   valid when this callback is called, but after it returns, there
 *   is no guarantee on the object's validity.
 *
 * - #EVAS_CALLBACK_KEY_DOWN: @p event_info is a pointer to an
 *   #Evas_Event_Key_Down struct\n\n
 *   This callback is called when a key is pressed and the focus is on
 *   the object, or a key has been grabbed to a particular object
 *   which wants to intercept the key press regardless of what object
 *   has the focus.
 *
 * - #EVAS_CALLBACK_KEY_UP: @p event_info is a pointer to an
 *   #Evas_Event_Key_Up struct \n\n
 *   This callback is called when a key is released and the focus is
 *   on the object, or a key has been grabbed to a particular object
 *   which wants to intercept the key release regardless of what
 *   object has the focus.
 *
 * - #EVAS_CALLBACK_FOCUS_IN: @p event_info is @c NULL \n\n
 *   This event is called when an object gains the focus. When it is
 *   called the object has already gained the focus.
 *
 * - #EVAS_CALLBACK_FOCUS_OUT: @p event_info is @c NULL \n\n
 *   This event is triggered when an object loses the focus. When it
 *   is called the object has already lost the focus.
 *
 * - #EVAS_CALLBACK_SHOW: @p event_info is @c NULL \n\n
 *   This event is triggered by the object being shown by
 *   evas_object_show().
 *
 * - #EVAS_CALLBACK_HIDE: @p event_info is @c NULL \n\n
 *   This event is triggered by an object being hidden by
 *   evas_object_hide().
 *
 * - #EVAS_CALLBACK_MOVE: @p event_info is @c NULL \n\n
 *   This event is triggered by an object being
 *   moved. evas_object_move() can trigger this, as can any
 *   object-specific manipulations that would mean the object's origin
 *   could move.
 *
 * - #EVAS_CALLBACK_RESIZE: @p event_info is @c NULL \n\n
 *   This event is triggered by an object being resized. Resizes can
 *   be triggered by evas_object_resize() or by any object-specific
 *   calls that may cause the object to resize.
 *
 * - #EVAS_CALLBACK_RESTACK: @p event_info is @c NULL \n\n
 *   This event is triggered by an object being re-stacked. Stacking
 *   changes can be triggered by
 *   evas_object_stack_below()/evas_object_stack_above() and others.
 *
 * - #EVAS_CALLBACK_DEL: @p event_info is @c NULL.
 *
 * - #EVAS_CALLBACK_HOLD: @p event_info is a pointer to an
 *   #Evas_Event_Hold struct
 *
 * - #EVAS_CALLBACK_CHANGED_SIZE_HINTS: @p event_info is @c NULL.
 *
 * - #EVAS_CALLBACK_IMAGE_PRELOADED: @p event_info is @c NULL.
 *
 * - #EVAS_CALLBACK_IMAGE_UNLOADED: @p event_info is @c NULL.
 *
 * @note Be careful not to add the same callback multiple times, if
 * that's not what you want, because Evas won't check if a callback
 * existed before exactly as the one being registered (and thus, call
 * it more than once on the event, in this case). This would make
 * sense if you passed different functions and/or callback data, only.
 *
 * Example:
 * @dontinclude evas-events.c
 * @skip evas_object_event_callback_add(
 * @until }
 *
 * See the full example @ref Example_Evas_Events "here".
 *
 */
EAPI void      evas_object_event_callback_add(Evas_Object *obj, Evas_Callback_Type type, Evas_Object_Event_Cb func, const void *data) EINA_ARG_NONNULL(1, 3);

/**
 * Add (register) a callback function to a given Evas object event with a
 * non-default priority set. Except for the priority field, it's exactly the
 * same as @ref evas_object_event_callback_add
 *
 * @param obj Object to attach a callback to
 * @param type The type of event that will trigger the callback
 * @param priority The priority of the callback, lower values called first.
 * @param func The function to be called when the event is triggered
 * @param data The data pointer to be passed to @p func
 *
 * @see evas_object_event_callback_add
 * @since 1.1
 */
EAPI void      evas_object_event_callback_priority_add(Evas_Object *obj, Evas_Callback_Type type, Evas_Callback_Priority priority, Evas_Object_Event_Cb func, const void *data) EINA_ARG_NONNULL(1, 4);

/**
 * Delete a callback function from an object
 *
 * @param obj Object to remove a callback from
 * @param type The type of event that was triggering the callback
 * @param func The function that was to be called when the event was triggered
 * @return The data pointer that was to be passed to the callback
 *
 * This function removes the most recently added callback from the
 * object @p obj which was triggered by the event type @p type and was
 * calling the function @p func when triggered. If the removal is
 * successful it will also return the data pointer that was passed to
 * evas_object_event_callback_add() when the callback was added to the
 * object. If not successful @c NULL will be returned.
 *
 * Example:
 * @code
 * extern Evas_Object *object;
 * void *my_data;
 * void up_callback(void *data, Evas *e, Evas_Object *obj, void *event_info);
 *
 * my_data = evas_object_event_callback_del(object, EVAS_CALLBACK_MOUSE_UP, up_callback);
 * @endcode
 */
EAPI void     *evas_object_event_callback_del(Evas_Object *obj, Evas_Callback_Type type, Evas_Object_Event_Cb func) EINA_ARG_NONNULL(1, 3);

/**
 * Delete (unregister) a callback function registered to a given
 * Evas object event.
 *
 * @param obj Object to remove a callback from
 * @param type The type of event that was triggering the callback
 * @param func The function that was to be called when the event was
 * triggered
 * @param data The data pointer that was to be passed to the callback
 * @return The data pointer that was to be passed to the callback
 *
 * This function removes the most recently added callback from the
 * object @p obj, which was triggered by the event type @p type and was
 * calling the function @p func with data @p data, when triggered. If
 * the removal is successful it will also return the data pointer that
 * was passed to evas_object_event_callback_add() (that will be the
 * same as the parameter) when the callback was added to the
 * object. In errors, @c NULL will be returned.
 *
 * @note For deletion of Evas object events callbacks filtering by
 * just type and function pointer, user
 * evas_object_event_callback_del().
 *
 * Example:
 * @code
 * extern Evas_Object *object;
 * void *my_data;
 * void up_callback(void *data, Evas *e, Evas_Object *obj, void *event_info);
 *
 * my_data = evas_object_event_callback_del_full(object, EVAS_CALLBACK_MOUSE_UP, up_callback, data);
 * @endcode
 */
EAPI void     *evas_object_event_callback_del_full(Evas_Object *obj, Evas_Callback_Type type, Evas_Object_Event_Cb func, const void *data) EINA_ARG_NONNULL(1, 3);

/**
 * Set whether an Evas object is to pass (ignore) events.
 *
 * @param obj the Evas object to operate on
 * @param pass whether @p obj is to pass events (@c EINA_TRUE) or not
 * (@c EINA_FALSE)
 *
 * If @p pass is @c EINA_TRUE, it will make events on @p obj to be @b
 * ignored. They will be triggered on the @b next lower object (that
 * is not set to pass events), instead (see evas_object_below_get()).
 *
 * If @p pass is @c EINA_FALSE, events will be processed on that
 * object as normal.
 *
 * @see evas_object_pass_events_get() for an example
 * @see evas_object_repeat_events_set()
 * @see evas_object_propagate_events_set()
 * @see evas_object_freeze_events_set()
 */
EAPI void      evas_object_pass_events_set(Evas_Object *obj, Eina_Bool pass) EINA_ARG_NONNULL(1);

/**
 * Determine whether an object is set to pass (ignore) events.
 *
 * @param obj the Evas object to get information from.
 * @return pass whether @p obj is set to pass events (@c EINA_TRUE) or not
 * (@c EINA_FALSE)
 *
 * Example:
 * @dontinclude evas-stacking.c
 * @skip if (strcmp(ev->key, "p") == 0)
 * @until }
 *
 * See the full @ref Example_Evas_Stacking "example".
 *
 * @see evas_object_pass_events_set()
 * @see evas_object_repeat_events_get()
 * @see evas_object_propagate_events_get()
 * @see evas_object_freeze_events_get()
 */
EAPI Eina_Bool evas_object_pass_events_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Set whether an Evas object is to repeat events.
 *
 * @param obj the Evas object to operate on
 * @param repeat whether @p obj is to repeat events (@c EINA_TRUE) or not
 * (@c EINA_FALSE)
 *
 * If @p repeat is @c EINA_TRUE, it will make events on @p obj to also
 * be repeated for the @b next lower object in the objects' stack (see
 * see evas_object_below_get()).
 *
 * If @p repeat is @c EINA_FALSE, events occurring on @p obj will be
 * processed only on it.
 *
 * Example:
 * @dontinclude evas-stacking.c
 * @skip if (strcmp(ev->key, "r") == 0)
 * @until }
 *
 * See the full @ref Example_Evas_Stacking "example".
 *
 * @see evas_object_repeat_events_get()
 * @see evas_object_pass_events_set()
 * @see evas_object_propagate_events_set()
 * @see evas_object_freeze_events_set()
 */
EAPI void      evas_object_repeat_events_set(Evas_Object *obj, Eina_Bool repeat) EINA_ARG_NONNULL(1);

/**
 * Determine whether an object is set to repeat events.
 *
 * @param obj the given Evas object pointer
 * @return whether @p obj is set to repeat events (@c EINA_TRUE)
 * or not (@c EINA_FALSE)
 *
 * @see evas_object_repeat_events_set() for an example
 * @see evas_object_pass_events_get()
 * @see evas_object_propagate_events_get()
 * @see evas_object_freeze_events_get()
 */
EAPI Eina_Bool evas_object_repeat_events_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Set whether events on a smart object's member should get propagated
 * up to its parent.
 *
 * @param obj the smart object's child to operate on
 * @param prop whether to propagate events (@c EINA_TRUE) or not
 * (@c EINA_FALSE)
 *
 * This function has @b no effect if @p obj is not a member of a smart
 * object.
 *
 * If @p prop is @c EINA_TRUE, events occurring on this object will be
 * propagated on to the smart object of which @p obj is a member.  If
 * @p prop is @c EINA_FALSE, events occurring on this object will @b
 * not be propagated on to the smart object of which @p obj is a
 * member.  The default value is @c EINA_TRUE.
 *
 * @see evas_object_propagate_events_get()
 * @see evas_object_repeat_events_set()
 * @see evas_object_pass_events_set()
 * @see evas_object_freeze_events_set()
 */
EAPI void      evas_object_propagate_events_set(Evas_Object *obj, Eina_Bool prop) EINA_ARG_NONNULL(1);

/**
 * Retrieve whether an Evas object is set to propagate events.
 *
 * @param obj the given Evas object pointer
 * @return whether @p obj is set to propagate events (@c EINA_TRUE)
 * or not (@c EINA_FALSE)
 *
 * @see evas_object_propagate_events_set()
 * @see evas_object_repeat_events_get()
 * @see evas_object_pass_events_get()
 * @see evas_object_freeze_events_get()
 */
EAPI Eina_Bool evas_object_propagate_events_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Set whether an Evas object is to freeze (discard) events.
 *
 * @param obj the Evas object to operate on
 * @param freeze pass whether @p obj is to freeze events (@c EINA_TRUE) or not
 * (@c EINA_FALSE)
 *
 * If @p freeze is @c EINA_TRUE, it will make events on @p obj to be @b
 * discarded. Unlike evas_object_pass_events_set(), events will not be
 * passed to @b next lower object. This API can be used for blocking
 * events while @p obj is on transiting.
 *
 * If @p freeze is @c EINA_FALSE, events will be processed on that
 * object as normal.
 *
 * @see evas_object_freeze_events_get()
 * @see evas_object_pass_events_set()
 * @see evas_object_repeat_events_set()
 * @see evas_object_propagate_events_set()
 * @since 1.1
 */
EAPI void      evas_object_freeze_events_set(Evas_Object *obj, Eina_Bool freeze) EINA_ARG_NONNULL(1);

/**
 * Determine whether an object is set to freeze (discard) events.
 *
 * @param obj the Evas object to get information from.
 * @return freeze whether @p obj is set to freeze events (@c EINA_TRUE) or
 * not (@c EINA_FALSE)
 *
 * @see evas_object_freeze_events_set()
 * @see evas_object_pass_events_get()
 * @see evas_object_repeat_events_get()
 * @see evas_object_propagate_events_get()
 * @since 1.1
 */
EAPI Eina_Bool evas_object_freeze_events_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);
/**
 * @}
 */

/**
 * @ingroup Evas_Object_Group_Map
 *
 * @{
 */

/**
 * Enable or disable the map that is set.
 *
 * Enable or disable the use of map for the object @p obj.
 * On enable, the object geometry will be saved, and the new geometry will
 * change (position and size) to reflect the map geometry set.
 *
 * If the object doesn't have a map set (with evas_object_map_set()), the
 * initial geometry will be undefined. It is advised to always set a map
 * to the object first, and then call this function to enable its use.
 *
 * @param obj object to enable the map on
 * @param enabled enabled state
 */
EAPI void            evas_object_map_enable_set(Evas_Object *obj, Eina_Bool enabled);

/**
 * Get the map enabled state
 *
 * This returns the currently enabled state of the map on the object indicated.
 * The default map enable state is off. You can enable and disable it with
 * evas_object_map_enable_set().
 *
 * @param obj object to get the map enabled state from
 * @return the map enabled state
 */
EAPI Eina_Bool       evas_object_map_enable_get(const Evas_Object *obj);

/**
 * Set current object transformation map.
 *
 * This sets the map on a given object. It is copied from the @p map pointer,
 * so there is no need to keep the @p map object if you don't need it anymore.
 *
 * A map is a set of 4 points which have canvas x, y coordinates per point,
 * with an optional z point value as a hint for perspective correction, if it
 * is available. As well each point has u and v coordinates. These are like
 * "texture coordinates" in OpenGL in that they define a point in the source
 * image that is mapped to that map vertex/point. The u corresponds to the x
 * coordinate of this mapped point and v, the y coordinate. Note that these
 * coordinates describe a bounding region to sample. If you have a 200x100
 * source image and want to display it at 200x100 with proper pixel
 * precision, then do:
 *
 * @code
 * Evas_Map *m = evas_map_new(4);
 * evas_map_point_coord_set(m, 0,   0,   0, 0);
 * evas_map_point_coord_set(m, 1, 200,   0, 0);
 * evas_map_point_coord_set(m, 2, 200, 100, 0);
 * evas_map_point_coord_set(m, 3,   0, 100, 0);
 * evas_map_point_image_uv_set(m, 0,   0,   0);
 * evas_map_point_image_uv_set(m, 1, 200,   0);
 * evas_map_point_image_uv_set(m, 2, 200, 100);
 * evas_map_point_image_uv_set(m, 3,   0, 100);
 * evas_object_map_set(obj, m);
 * evas_map_free(m);
 * @endcode
 *
 * Note that the map points a uv coordinates match the image geometry. If
 * the @p map parameter is NULL, the stored map will be freed and geometry
 * prior to enabling/setting a map will be restored.
 *
 * @param obj object to change transformation map
 * @param map new map to use
 *
 * @see evas_map_new()
 */
EAPI void            evas_object_map_set(Evas_Object *obj, const Evas_Map *map);

/**
 * Get current object transformation map.
 *
 * This returns the current internal map set on the indicated object. It is
 * intended for read-only access and is only valid as long as the object is
 * not deleted or the map on the object is not changed. If you wish to modify
 * the map and set it back do the following:
 *
 * @code
 * const Evas_Map *m = evas_object_map_get(obj);
 * Evas_Map *m2 = evas_map_dup(m);
 * evas_map_util_rotate(m2, 30.0, 0, 0);
 * evas_object_map_set(obj, m2);
 * evas_map_free(m2);
 * @endcode
 *
 * @param obj object to query transformation map.
 * @return map reference to map in use. This is an internal data structure, so
 * do not modify it.
 *
 * @see evas_object_map_set()
 */
EAPI const Evas_Map *evas_object_map_get(const Evas_Object *obj);
/**
 * @}
 */

/**
 * @ingroup Evas_Object_Group_Size_Hints
 *
 * @{
 */

/**
 * Retrieves the hints for an object's minimum size.
 *
 * @param obj The given Evas object to query hints from.
 * @param w Pointer to an integer in which to store the minimum width.
 * @param h Pointer to an integer in which to store the minimum height.
 *
 * These are hints on the minimum sizes @p obj should have. This is
 * not a size enforcement in any way, it's just a hint that should be
 * used whenever appropriate.
 *
 * @note Use @c NULL pointers on the hint components you're not
 * interested in: they'll be ignored by the function.
 *
 * @see evas_object_size_hint_min_set() for an example
 */
EAPI void evas_object_size_hint_min_get(const Evas_Object *obj, Evas_Coord *w, Evas_Coord *h) EINA_ARG_NONNULL(1);

/**
 * Sets the hints for an object's minimum size.
 *
 * @param obj The given Evas object to query hints from.
 * @param w Integer to use as the minimum width hint.
 * @param h Integer to use as the minimum height hint.
 *
 * This is not a size enforcement in any way, it's just a hint that
 * should be used whenever appropriate.
 *
 * Values @c 0 will be treated as unset hint components, when queried
 * by managers.
 *
 * Example:
 * @dontinclude evas-hints.c
 * @skip evas_object_size_hint_min_set
 * @until return
 *
 * In this example the minimum size hints change the behavior of an
 * Evas box when layouting its children. See the full @ref
 * Example_Evas_Size_Hints "example".
 *
 * @see evas_object_size_hint_min_get()
 */
EAPI void evas_object_size_hint_min_set(Evas_Object *obj, Evas_Coord w, Evas_Coord h) EINA_ARG_NONNULL(1);

/**
 * Retrieves the hints for an object's maximum size.
 *
 * @param obj The given Evas object to query hints from.
 * @param w Pointer to an integer in which to store the maximum width.
 * @param h Pointer to an integer in which to store the maximum height.
 *
 * These are hints on the maximum sizes @p obj should have. This is
 * not a size enforcement in any way, it's just a hint that should be
 * used whenever appropriate.
 *
 * @note Use @c NULL pointers on the hint components you're not
 * interested in: they'll be ignored by the function.
 *
 * @see evas_object_size_hint_max_set()
 */
EAPI void evas_object_size_hint_max_get(const Evas_Object *obj, Evas_Coord *w, Evas_Coord *h) EINA_ARG_NONNULL(1);

/**
 * Sets the hints for an object's maximum size.
 *
 * @param obj The given Evas object to query hints from.
 * @param w Integer to use as the maximum width hint.
 * @param h Integer to use as the maximum height hint.
 *
 * This is not a size enforcement in any way, it's just a hint that
 * should be used whenever appropriate.
 *
 * Values @c -1 will be treated as unset hint components, when queried
 * by managers.
 *
 * Example:
 * @dontinclude evas-hints.c
 * @skip evas_object_size_hint_max_set
 * @until return
 *
 * In this example the maximum size hints change the behavior of an
 * Evas box when layouting its children. See the full @ref
 * Example_Evas_Size_Hints "example".
 *
 * @see evas_object_size_hint_max_get()
 */
EAPI void evas_object_size_hint_max_set(Evas_Object *obj, Evas_Coord w, Evas_Coord h) EINA_ARG_NONNULL(1);

/**
 * Retrieves the hints for an object's display mode
 *
 * @param obj The given Evas object to query hints from.
 *
 * These are hints on the display mode @p obj. This is
 * not a size enforcement in any way, it's just a hint that can be
 * used whenever appropriate.
 * This mode can be used object's display mode like commpress or expand
 *
 * @see evas_object_size_hint_display_mode_set()
 */
EAPI Evas_Display_Mode evas_object_size_hint_display_mode_get(const Evas_Object *obj) EINA_ARG_NONNULL(1);

/**
 * Sets the hints for an object's disply mode
 *
 * @param obj The given Evas object to query hints from.
 * @param dispmode to use as the display mode hint.
 *
 * This is not a size enforcement in any way, it's just a hint that
 * can be used whenever appropriate.
 *
 * @see evas_object_size_hint_display_mode_get()
 */
EAPI void evas_object_size_hint_display_mode_set(Evas_Object *obj, Evas_Display_Mode dispmode) EINA_ARG_NONNULL(1);

/**
 * Retrieves the hints for an object's optimum size.
 *
 * @param obj The given Evas object to query hints from.
 * @param w Pointer to an integer in which to store the requested width.
 * @param h Pointer to an integer in which to store the requested height.
 *
 * These are hints on the optimum sizes @p obj should have. This is
 * not a size enforcement in any way, it's just a hint that should be
 * used whenever appropriate.
 *
 * @note Use @c NULL pointers on the hint components you're not
 * interested in: they'll be ignored by the function.
 *
 * @see evas_object_size_hint_request_set()
 */
EAPI void evas_object_size_hint_request_get(const Evas_Object *obj, Evas_Coord *w, Evas_Coord *h) EINA_ARG_NONNULL(1);

/**
 * Sets the hints for an object's optimum size.
 *
 * @param obj The given Evas object to query hints from.
 * @param w Integer to use as the preferred width hint.
 * @param h Integer to use as the preferred height hint.
 *
 * This is not a size enforcement in any way, it's just a hint that
 * should be used whenever appropriate.
 *
 * Values @c 0 will be treated as unset hint components, when queried
 * by managers.
 *
 * @see evas_object_size_hint_request_get()
 */
EAPI void evas_object_size_hint_request_set(Evas_Object *obj, Evas_Coord w, Evas_Coord h) EINA_ARG_NONNULL(1);

/**
 * Retrieves the hints for an object's aspect ratio.
 *
 * @param obj The given Evas object to query hints from.
 * @param aspect Returns the policy/type of aspect ratio applied to @p obj.
 * @param w Pointer to an integer in which to store the aspect's width
 * ratio term.
 * @param h Pointer to an integer in which to store the aspect's
 * height ratio term.
 *
 * The different aspect ratio policies are documented in the
 * #Evas_Aspect_Control type. A container respecting these size hints
 * would @b resize its children accordingly to those policies.
 *
 * For any policy, if any of the given aspect ratio terms are @c 0,
 * the object's container should ignore the aspect and scale @p obj to
 * occupy the whole available area. If they are both positive
 * integers, that proportion will be respected, under each scaling
 * policy.
 *
 * These images illustrate some of the #Evas_Aspect_Control policies:
 *
 * @image html any-policy.png
 * @image rtf any-policy.png
 * @image latex any-policy.eps
 *
 * @image html aspect-control-none-neither.png
 * @image rtf aspect-control-none-neither.png
 * @image latex aspect-control-none-neither.eps
 *
 * @image html aspect-control-both.png
 * @image rtf aspect-control-both.png
 * @image latex aspect-control-both.eps
 *
 * @image html aspect-control-horizontal.png
 * @image rtf aspect-control-horizontal.png
 * @image latex aspect-control-horizontal.eps
 *
 * This is not a size enforcement in any way, it's just a hint that
 * should be used whenever appropriate.
 *
 * @note Use @c NULL pointers on the hint components you're not
 * interested in: they'll be ignored by the function.
 *
 * Example:
 * @dontinclude evas-aspect-hints.c
 * @skip if (strcmp(ev->key, "c") == 0)
 * @until }
 *
 * See the full @ref Example_Evas_Aspect_Hints "example".
 *
 * @see evas_object_size_hint_aspect_set()
 */
EAPI void evas_object_size_hint_aspect_get(const Evas_Object *obj, Evas_Aspect_Control *aspect, Evas_Coord *w, Evas_Coord *h) EINA_ARG_NONNULL(1);

/**
 * Sets the hints for an object's aspect ratio.
 *
 * @param obj The given Evas object to query hints from.
 * @param aspect The policy/type of aspect ratio to apply to @p obj.
 * @param w Integer to use as aspect width ratio term.
 * @param h Integer to use as aspect height ratio term.
 *
 * This is not a size enforcement in any way, it's just a hint that should
 * be used whenever appropriate.
 *
 * If any of the given aspect ratio terms are @c 0,
 * the object's container will ignore the aspect and scale @p obj to
 * occupy the whole available area, for any given policy.
 *
 * @see evas_object_size_hint_aspect_get() for more information.
 */
EAPI void evas_object_size_hint_aspect_set(Evas_Object *obj, Evas_Aspect_Control aspect, Evas_Coord w, Evas_Coord h) EINA_ARG_NONNULL(1);

/**
 * Retrieves the hints for on object's alignment.
 *
 * @param obj The given Evas object to query hints from.
 * @param x Pointer to a double in which to store the horizontal
 * alignment hint.
 * @param y Pointer to a double in which to store the vertical
 * alignment hint.
 *
 * This is not a size enforcement in any way, it's just a hint that
 * should be used whenever appropriate.
 *
 * @note Use @c NULL pointers on the hint components you're not
 * interested in: they'll be ignored by the function.
 * @note If @c obj is invalid, then the hint components will be set with 0.5
 *
 * @see evas_object_size_hint_align_set() for more information
 */
EAPI void evas_object_size_hint_align_get(const Evas_Object *obj, double *x, double *y) EINA_ARG_NONNULL(1);

/**
 * Sets the hints for an object's alignment.
 *
 * @param obj The given Evas object to query hints from.
 * @param x Double, ranging from @c 0.0 to @c 1.0 or with the
 * special value #EVAS_HINT_FILL, to use as horizontal alignment hint.
 * @param y Double, ranging from @c 0.0 to @c 1.0 or with the
 * special value #EVAS_HINT_FILL, to use as vertical alignment hint.
 *
 * These are hints on how to align an object <b>inside the boundaries
 * of a container/manager</b>. Accepted values are in the @c 0.0 to @c
 * 1.0 range, with the special value #EVAS_HINT_FILL used to specify
 * "justify" or "fill" by some users. In this case, maximum size hints
 * should be enforced with higher priority, if they are set. Also, any
 * padding hint set on objects should add up to the alignment space on
 * the final scene composition.
 *
 * See documentation of possible users: in Evas, they are the @ref
 * Evas_Object_Box "box" and @ref Evas_Object_Table "table" smart
 * objects.
 *
 * For the horizontal component, @c 0.0 means to the left, @c 1.0
 * means to the right. Analogously, for the vertical component, @c 0.0
 * to the top, @c 1.0 means to the bottom.
 *
 * See the following figure:
 *
 * @image html alignment-hints.png
 * @image rtf alignment-hints.png
 * @image latex alignment-hints.eps
 *
 * This is not a size enforcement in any way, it's just a hint that
 * should be used whenever appropriate.
 *
 * @note Default alignment hint values are 0.5, for both axis.
 *
 * Example:
 * @dontinclude evas-hints.c
 * @skip evas_object_size_hint_align_set
 * @until return
 *
 * In this example the alignment hints change the behavior of an Evas
 * box when layouting its children. See the full @ref
 * Example_Evas_Size_Hints "example".
 *
 * @see evas_object_size_hint_align_get()
 * @see evas_object_size_hint_max_set()
 * @see evas_object_size_hint_padding_set()
 */
EAPI void evas_object_size_hint_align_set(Evas_Object *obj, double x, double y) EINA_ARG_NONNULL(1);

/**
 * Retrieves the hints for an object's weight.
 *
 * @param obj The given Evas object to query hints from.
 * @param x Pointer to a double in which to store the horizontal weight.
 * @param y Pointer to a double in which to store the vertical weight.
 *
 * Accepted values are zero or positive values. Some users might use
 * this hint as a boolean, but some might consider it as a @b
 * proportion, see documentation of possible users, which in Evas are
 * the @ref Evas_Object_Box "box" and @ref Evas_Object_Table "table"
 * smart objects.
 *
 * This is not a size enforcement in any way, it's just a hint that
 * should be used whenever appropriate.
 *
 * @note Use @c NULL pointers on the hint components you're not
 * interested in: they'll be ignored by the function.
 * @note If @c obj is invalid, then the hint components will be set with 0.0
 *
 * @see evas_object_size_hint_weight_set() for an example
 */
EAPI void evas_object_size_hint_weight_get(const Evas_Object *obj, double *x, double *y) EINA_ARG_NONNULL(1);

/**
 * Sets the hints for an object's weight.
 *
 * @param obj The given Evas object to query hints from.
 * @param x Nonnegative double value to use as horizontal weight hint.
 * @param y Nonnegative double value to use as vertical weight hint.
 *
 * This is not a size enforcement in any way, it's just a hint that
 * should be used whenever appropriate.
 *
 * This is a hint on how a container object should @b resize a given
 * child within its area. Containers may adhere to the simpler logic
 * of just expanding the child object's dimensions to fit its own (see
 * the #EVAS_HINT_EXPAND helper weight macro) or the complete one of
 * taking each child's weight hint as real @b weights to how much of
 * its size to allocate for them in each axis. A container is supposed
 * to, after @b normalizing the weights of its children (with weight
 * hints), distribute the space it has to layout them by those factors
 * -- most weighted children get larger in this process than the least
 * ones.
 *
 * Example:
 * @dontinclude evas-hints.c
 * @skip evas_object_size_hint_weight_set
 * @until return
 *
 * In this example the weight hints change the behavior of an Evas box
 * when layouting its children. See the full @ref
 * Example_Evas_Size_Hints "example".
 *
 * @note Default weight hint values are 0.0, for both axis.
 *
 * @see evas_object_size_hint_weight_get() for more information
 */
EAPI void evas_object_size_hint_weight_set(Evas_Object *obj, double x, double y) EINA_ARG_NONNULL(1);

/**
 * Retrieves the hints for an object's padding space.
 *
 * @param obj The given Evas object to query hints from.
 * @param l Pointer to an integer in which to store left padding.
 * @param r Pointer to an integer in which to store right padding.
 * @param t Pointer to an integer in which to store top padding.
 * @param b Pointer to an integer in which to store bottom padding.
 *
 * Padding is extra space an object takes on each of its delimiting
 * rectangle sides, in canvas units. This space will be rendered
 * transparent, naturally, as in the following figure:
 *
 * @image html padding-hints.png
 * @image rtf padding-hints.png
 * @image latex padding-hints.eps
 *
 * This is not a size enforcement in any way, it's just a hint that
 * should be used whenever appropriate.
 *
 * @note Use @c NULL pointers on the hint components you're not
 * interested in: they'll be ignored by the function.
 *
 * Example:
 * @dontinclude evas-hints.c
 * @skip evas_object_size_hint_padding_set
 * @until return
 *
 * In this example the padding hints change the behavior of an Evas box
 * when layouting its children. See the full @ref
 * Example_Evas_Size_Hints "example".
 *
 * @see evas_object_size_hint_padding_set()
 */
EAPI void evas_object_size_hint_padding_get(const Evas_Object *obj, Evas_Coord *l, Evas_Coord *r, Evas_Coord *t, Evas_Coord *b) EINA_ARG_NONNULL(1);

/**
 * Sets the hints for an object's padding space.
 *
 * @param obj The given Evas object to query hints from.
 * @param l Integer to specify left padding.
 * @param r Integer to specify right padding.
 * @param t Integer to specify top padding.
 * @param b Integer to specify bottom padding.
 *
 * This is not a size enforcement in any way, it's just a hint that
 * should be used whenever appropriate.
 *
 * @see evas_object_size_hint_padding_get() for more information
 */
EAPI void evas_object_size_hint_padding_set(Evas_Object *obj, Evas_Coord l, Evas_Coord r, Evas_Coord t, Evas_Coord b) EINA_ARG_NONNULL(1);
/**
 * @}
 */

/**
 * @ingroup Evas_Object_Group_Extras
 *
 * @{
 */

/**
 * Set an attached data pointer to an object with a given string key.
 *
 * @param obj The object to attach the data pointer to
 * @param key The string key for the data to access it
 * @param data The pointer to the data to be attached
 *
 * This attaches the pointer @p data to the object @p obj, given the
 * access string @p key. This pointer will stay "hooked" to the object
 * until a new pointer with the same string key is attached with
 * evas_object_data_set() or it is deleted with
 * evas_object_data_del(). On deletion of the object @p obj, the
 * pointers will not be accessible from the object anymore.
 *
 * You can find the pointer attached under a string key using
 * evas_object_data_get(). It is the job of the calling application to
 * free any data pointed to by @p data when it is no longer required.
 *
 * If @p data is @c NULL, the old value stored at @p key will be
 * removed but no new value will be stored. This is synonymous with
 * calling evas_object_data_del() with @p obj and @p key.
 *
 * @note This function is very handy when you have data associated
 * specifically to an Evas object, being of use only when dealing with
 * it. Than you don't have the burden to a pointer to it elsewhere,
 * using this family of functions.
 *
 * Example:
 *
 * @code
 * int *my_data;
 * extern Evas_Object *obj;
 *
 * my_data = malloc(500);
 * evas_object_data_set(obj, "name_of_data", my_data);
 * printf("The data that was attached was %p\n", evas_object_data_get(obj, "name_of_data"));
 * @endcode
 */
EAPI void                     evas_object_data_set(Evas_Object *obj, const char *key, const void *data) EINA_ARG_NONNULL(1, 2);

/**
 * Return an attached data pointer on an Evas object by its given
 * string key.
 *
 * @param obj The object to which the data was attached
 * @param key The string key the data was stored under
 * @return The data pointer stored, or @c NULL if none was stored
 *
 * This function will return the data pointer attached to the object
 * @p obj, stored using the string key @p key. If the object is valid
 * and a data pointer was stored under the given key, that pointer
 * will be returned. If this is not the case, @c NULL will be
 * returned, signifying an invalid object or a non-existent key. It is
 * possible that a @c NULL pointer was stored given that key, but this
 * situation is non-sensical and thus can be considered an error as
 * well. @c NULL pointers are never stored as this is the return value
 * if an error occurs.
 *
 * Example:
 *
 * @code
 * int *my_data;
 * extern Evas_Object *obj;
 *
 * my_data = evas_object_data_get(obj, "name_of_my_data");
 * if (my_data) printf("Data stored was %p\n", my_data);
 * else printf("No data was stored on the object\n");
 * @endcode
 */
EAPI void                    *evas_object_data_get(const Evas_Object *obj, const char *key) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1, 2);

/**
 * Delete an attached data pointer from an object.
 *
 * @param obj The object to delete the data pointer from
 * @param key The string key the data was stored under
 * @return The original data pointer stored at @p key on @p obj
 *
 * This will remove the stored data pointer from @p obj stored under
 * @p key and return this same pointer, if actually there was data
 * there, or @c NULL, if nothing was stored under that key.
 *
 * Example:
 *
 * @code
 * int *my_data;
 * extern Evas_Object *obj;
 *
 * my_data = evas_object_data_del(obj, "name_of_my_data");
 * @endcode
 */
EAPI void                    *evas_object_data_del(Evas_Object *obj, const char *key) EINA_ARG_NONNULL(1, 2);

/**
 * Set pointer behavior.
 *
 * @param obj
 * @param setting desired behavior.
 *
 * This function has direct effect on event callbacks related to
 * mouse.
 *
 * If @p setting is EVAS_OBJECT_POINTER_MODE_AUTOGRAB, then when mouse
 * is down at this object, events will be restricted to it as source,
 * mouse moves, for example, will be emitted even if outside this
 * object area.
 *
 * If @p setting is EVAS_OBJECT_POINTER_MODE_NOGRAB, then events will
 * be emitted just when inside this object area.
 *
 * The default value is EVAS_OBJECT_POINTER_MODE_AUTOGRAB.
 *
 * @ingroup Evas_Object_Group_Extras
 */
EAPI void                     evas_object_pointer_mode_set(Evas_Object *obj, Evas_Object_Pointer_Mode setting) EINA_ARG_NONNULL(1);

/**
 * Determine how pointer will behave.
 * @param obj
 * @return pointer behavior.
 * @ingroup Evas_Object_Group_Extras
 */
EAPI Evas_Object_Pointer_Mode evas_object_pointer_mode_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Sets whether or not the given Evas object is to be drawn anti-aliased.
 *
 * @param   obj The given Evas object.
 * @param   antialias 1 if the object is to be anti_aliased, 0 otherwise.
 * @ingroup Evas_Object_Group_Extras
 */
EAPI void                     evas_object_anti_alias_set(Evas_Object *obj, Eina_Bool antialias) EINA_ARG_NONNULL(1);

/**
 * Retrieves whether or not the given Evas object is to be drawn anti_aliased.
 * @param   obj The given Evas object.
 * @return  @c 1 if the object is to be anti_aliased.  @c 0 otherwise.
 * @ingroup Evas_Object_Group_Extras
 */
EAPI Eina_Bool                evas_object_anti_alias_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Sets the scaling factor for an Evas object. Does not affect all
 * objects.
 *
 * @param obj The given Evas object.
 * @param scale The scaling factor. <c>1.0</c> means no scaling,
 *        default size.
 *
 * This will multiply the object's dimension by the given factor, thus
 * altering its geometry (width and height). Useful when you want
 * scalable UI elements, possibly at run time.
 *
 * @note Only text and textblock objects have scaling change
 * handlers. Other objects won't change visually on this call.
 *
 * @see evas_object_scale_get()
 *
 * @ingroup Evas_Object_Group_Extras
 */
EAPI void                     evas_object_scale_set(Evas_Object *obj, double scale) EINA_ARG_NONNULL(1);

/**
 * Retrieves the scaling factor for the given Evas object.
 *
 * @param   obj The given Evas object.
 * @return  The scaling factor.
 *
 * @ingroup Evas_Object_Group_Extras
 *
 * @see evas_object_scale_set()
 */
EAPI double                   evas_object_scale_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Sets the render_op to be used for rendering the Evas object.
 * @param   obj The given Evas object.
 * @param   op one of the Evas_Render_Op values.
 * @ingroup Evas_Object_Group_Extras
 */
EAPI void                     evas_object_render_op_set(Evas_Object *obj, Evas_Render_Op op) EINA_ARG_NONNULL(1);

/**
 * Retrieves the current value of the operation used for rendering the Evas object.
 * @param   obj The given Evas object.
 * @return  one of the enumerated values in Evas_Render_Op.
 * @ingroup Evas_Object_Group_Extras
 */
EAPI Evas_Render_Op           evas_object_render_op_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Set whether to use precise (usually expensive) point collision
 * detection for a given Evas object.
 *
 * @param obj The given object.
 * @param precise Whether to use precise point collision detection or
 * not. The default value is false.
 *
 * Use this function to make Evas treat objects' transparent areas as
 * @b not belonging to it with regard to mouse pointer events. By
 * default, all of the object's boundary rectangle will be taken in
 * account for them.
 *
 * @warning By using precise point collision detection you'll be
 * making Evas more resource intensive.
 *
 * Example code follows.
 * @dontinclude evas-events.c
 * @skip if (strcmp(ev->key, "p") == 0)
 * @until }
 *
 * See the full example @ref Example_Evas_Events "here".
 *
 * @see evas_object_precise_is_inside_get()
 * @ingroup Evas_Object_Group_Extras
 */
EAPI void                     evas_object_precise_is_inside_set(Evas_Object *obj, Eina_Bool precise) EINA_ARG_NONNULL(1);

/**
 * Determine whether an object is set to use precise point collision
 * detection.
 *
 * @param obj The given object.
 * @return whether @p obj is set to use precise point collision
 * detection or not The default value is false.
 *
 * @see evas_object_precise_is_inside_set() for an example
 *
 * @ingroup Evas_Object_Group_Extras
 */
EAPI Eina_Bool                evas_object_precise_is_inside_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Set a hint flag on the given Evas object that it's used as a "static
 * clipper".
 *
 * @param obj The given object.
 * @param is_static_clip @c EINA_TRUE if it's to be used as a static
 * clipper, @c EINA_FALSE otherwise.
 *
 * This is a hint to Evas that this object is used as a big static
 * clipper and shouldn't be moved with children and otherwise
 * considered specially. The default value for new objects is
 * @c EINA_FALSE.
 *
 * @see evas_object_static_clip_get()
 *
 * @ingroup Evas_Object_Group_Extras
 */
EAPI void                     evas_object_static_clip_set(Evas_Object *obj, Eina_Bool is_static_clip) EINA_ARG_NONNULL(1);

/**
 * Get the "static clipper" hint flag for a given Evas object.
 *
 * @param obj The given object.
 * @return @c EINA_TRUE if it's set as a static clipper,
 * @c EINA_FALSE otherwise.
 *
 * @see evas_object_static_clip_set() for more details
 *
 * @ingroup Evas_Object_Group_Extras
 */
EAPI Eina_Bool                evas_object_static_clip_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);
/**
 * @}
 */

/**
 * @ingroup Evas_Object_Group_Find
 *
 * @{
 */

/**
 * Retrieve the object that currently has focus.
 *
 * @param e The Evas canvas to query for focused object on.
 * @return The object that has focus or @c NULL if there is not one.
 *
 * Evas can have (at most) one of its objects focused at a time.
 * Focused objects will be the ones having <b>key events</b> delivered
 * to, which the programmer can act upon by means of
 * evas_object_event_callback_add() usage.
 *
 * @note Most users wouldn't be dealing directly with Evas' focused
 * objects. Instead, they would be using a higher level library for
 * that (like a toolkit, as Elementary) to handle focus and who's
 * receiving input for them.
 *
 * This call returns the object that currently has focus on the canvas
 * @p e or @c NULL, if none.
 *
 * @see evas_object_focus_set
 * @see evas_object_focus_get
 * @see evas_object_key_grab
 * @see evas_object_key_ungrab
 *
 * Example:
 * @dontinclude evas-events.c
 * @skip evas_event_callback_add(d.canvas, EVAS_CALLBACK_CANVAS_OBJECT_FOCUS_IN,
 * @until evas_object_focus_set(d.bg, EINA_TRUE);
 * @dontinclude evas-events.c
 * @skip called when our rectangle gets focus
 * @until }
 *
 * In this example the @c event_info is exactly a pointer to that
 * focused rectangle. See the full @ref Example_Evas_Events "example".
 *
 * @ingroup Evas_Object_Group_Find
 */
EAPI Evas_Object *evas_focus_get(const Evas *e) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Retrieves the object on the given evas with the given name.
 * @param   e    The given evas.
 * @param   name The given name.
 * @return  If successful, the Evas object with the given name.  Otherwise,
 *          @c NULL.
 *
 * This looks for the evas object given a name by evas_object_name_set(). If
 * the name is not unique canvas-wide, then which one of the many objects
 * with that name is returned is undefined, so only use this if you can ensure
 * the object name is unique.
 *
 * @ingroup Evas_Object_Group_Find
 */
EAPI Evas_Object *evas_object_name_find(const Evas *e, const char *name) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Retrieves the object from children of the given object with the given name.
 * @param   obj  The parent (smart) object whose children to search.
 * @param   name The given name.
 * @param   recurse Set to the number of child levels to recurse (0 == don't recurse, 1 == only look at the children of @p obj or their immediate children, but no further etc.).
 * @return  If successful, the Evas object with the given name.  Otherwise,
 *          @c NULL.
 *
 * This looks for the evas object given a name by evas_object_name_set(), but
 * it ONLY looks at the children of the object *p obj, and will only recurse
 * into those children if @p recurse is greater than 0. If the name is not
 * unique within immediate children (or the whole child tree) then it is not
 * defined which child object will be returned. If @p recurse is set to -1 then
 * it will recurse without limit.
 *
 * @since 1.2
 *
 * @ingroup Evas_Object_Group_Find
 */
EAPI Evas_Object *evas_object_name_child_find(const Evas_Object *obj, const char *name, int recurse) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Retrieve the Evas object stacked at the top of a given position in
 * a canvas
 *
 * @param   e A handle to the canvas.
 * @param   x The horizontal coordinate of the position
 * @param   y The vertical coordinate of the position
 * @param   include_pass_events_objects Boolean flag to include or not
 * objects which pass events in this calculation
 * @param   include_hidden_objects Boolean flag to include or not hidden
 * objects in this calculation
 * @return  The Evas object that is over all other objects at the given
 * position.
 *
 * This function will traverse all the layers of the given canvas,
 * from top to bottom, querying for objects with areas covering the
 * given position. The user can remove from the query
 * objects which are hidden and/or which are set to pass events.
 *
 * @warning This function will @b skip objects parented by smart
 * objects, acting only on the ones at the "top level", with regard to
 * object parenting.
 */
EAPI Evas_Object *evas_object_top_at_xy_get(const Evas *e, Evas_Coord x, Evas_Coord y, Eina_Bool include_pass_events_objects, Eina_Bool include_hidden_objects) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Retrieve the Evas object stacked at the top at the position of the
 * mouse cursor, over a given canvas
 *
 * @param   e A handle to the canvas.
 * @return  The Evas object that is over all other objects at the mouse
 * pointer's position
 *
 * This function will traverse all the layers of the given canvas,
 * from top to bottom, querying for objects with areas covering the
 * mouse pointer's position, over @p e.
 *
 * @warning This function will @b skip objects parented by smart
 * objects, acting only on the ones at the "top level", with regard to
 * object parenting.
 */
EAPI Evas_Object *evas_object_top_at_pointer_get(const Evas *e) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Retrieve the Evas object stacked at the top of a given rectangular
 * region in a canvas
 *
 * @param   e A handle to the canvas.
 * @param   x The top left corner's horizontal coordinate for the
 * rectangular region
 * @param   y The top left corner's vertical coordinate for the
 * rectangular region
 * @param   w The width of the rectangular region
 * @param   h The height of the rectangular region
 * @param   include_pass_events_objects Boolean flag to include or not
 * objects which pass events in this calculation
 * @param   include_hidden_objects Boolean flag to include or not hidden
 * objects in this calculation
 * @return  The Evas object that is over all other objects at the given
 * rectangular region.
 *
 * This function will traverse all the layers of the given canvas,
 * from top to bottom, querying for objects with areas overlapping
 * with the given rectangular region inside @p e. The user can remove
 * from the query objects which are hidden and/or which are set to
 * pass events.
 *
 * @warning This function will @b skip objects parented by smart
 * objects, acting only on the ones at the "top level", with regard to
 * object parenting.
 */
EAPI Evas_Object *evas_object_top_in_rectangle_get(const Evas *e, Evas_Coord x, Evas_Coord y, Evas_Coord w, Evas_Coord h, Eina_Bool include_pass_events_objects, Eina_Bool include_hidden_objects) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Retrieve a list of Evas objects lying over a given position in
 * a canvas
 *
 * @param   e A handle to the canvas.
 * @param   x The horizontal coordinate of the position
 * @param   y The vertical coordinate of the position
 * @param   include_pass_events_objects Boolean flag to include or not
 * objects which pass events in this calculation
 * @param   include_hidden_objects Boolean flag to include or not hidden
 * objects in this calculation
 * @return  The list of Evas objects that are over the given position
 * in @p e
 *
 * This function will traverse all the layers of the given canvas,
 * from top to bottom, querying for objects with areas covering the
 * given position. The user can remove from query
 * objects which are hidden and/or which are set to pass events.
 *
 * @warning This function will @b skip objects parented by smart
 * objects, acting only on the ones at the "top level", with regard to
 * object parenting.
 */
EAPI Eina_List   *evas_objects_at_xy_get(const Evas *e, Evas_Coord x, Evas_Coord y, Eina_Bool include_pass_events_objects, Eina_Bool include_hidden_objects) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);
EAPI Eina_List   *evas_objects_in_rectangle_get(const Evas *e, Evas_Coord x, Evas_Coord y, Evas_Coord w, Evas_Coord h, Eina_Bool include_pass_events_objects, Eina_Bool include_hidden_objects) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Get the lowest (stacked) Evas object on the canvas @p e.
 *
 * @param e a valid canvas pointer
 * @return a pointer to the lowest object on it, if any, or @c NULL,
 * otherwise
 *
 * This function will take all populated layers in the canvas into
 * account, getting the lowest object for the lowest layer, naturally.
 *
 * @see evas_object_layer_get()
 * @see evas_object_layer_set()
 * @see evas_object_below_get()
 * @see evas_object_above_get()
 *
 * @warning This function will @b skip objects parented by smart
 * objects, acting only on the ones at the "top level", with regard to
 * object parenting.
 */
EAPI Evas_Object *evas_object_bottom_get(const Evas *e) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Get the highest (stacked) Evas object on the canvas @p e.
 *
 * @param e a valid canvas pointer
 * @return a pointer to the highest object on it, if any, or @c NULL,
 * otherwise
 *
 * This function will take all populated layers in the canvas into
 * account, getting the highest object for the highest layer,
 * naturally.
 *
 * @see evas_object_layer_get()
 * @see evas_object_layer_set()
 * @see evas_object_below_get()
 * @see evas_object_above_get()
 *
 * @warning This function will @b skip objects parented by smart
 * objects, acting only on the ones at the "top level", with regard to
 * object parenting.
 */
EAPI Evas_Object *evas_object_top_get(const Evas *e) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);
/**
 * @}
 */

/**
 * @ingroup Evas_Object_Group_Interceptors
 *
 * @{
 */

/**
 * Set the callback function that intercepts a show event of a object.
 *
 * @param obj The given canvas object pointer.
 * @param func The given function to be the callback function.
 * @param data The data passed to the callback function.
 *
 * This function sets a callback function to intercepts a show event
 * of a canvas object.
 *
 * @see evas_object_intercept_show_callback_del().
 *
 */
EAPI void  evas_object_intercept_show_callback_add(Evas_Object *obj, Evas_Object_Intercept_Show_Cb func, const void *data) EINA_ARG_NONNULL(1, 2);

/**
 * Unset the callback function that intercepts a show event of a
 * object.
 *
 * @param obj The given canvas object pointer.
 * @param func The given callback function.
 *
 * This function sets a callback function to intercepts a show event
 * of a canvas object.
 *
 * @see evas_object_intercept_show_callback_add().
 *
 */
EAPI void *evas_object_intercept_show_callback_del(Evas_Object *obj, Evas_Object_Intercept_Show_Cb func) EINA_ARG_NONNULL(1, 2);

/**
 * Set the callback function that intercepts a hide event of a object.
 *
 * @param obj The given canvas object pointer.
 * @param func The given function to be the callback function.
 * @param data The data passed to the callback function.
 *
 * This function sets a callback function to intercepts a hide event
 * of a canvas object.
 *
 * @see evas_object_intercept_hide_callback_del().
 *
 */
EAPI void  evas_object_intercept_hide_callback_add(Evas_Object *obj, Evas_Object_Intercept_Hide_Cb func, const void *data) EINA_ARG_NONNULL(1, 2);

/**
 * Unset the callback function that intercepts a hide event of a
 * object.
 *
 * @param obj The given canvas object pointer.
 * @param func The given callback function.
 *
 * This function sets a callback function to intercepts a hide event
 * of a canvas object.
 *
 * @see evas_object_intercept_hide_callback_add().
 *
 */
EAPI void *evas_object_intercept_hide_callback_del(Evas_Object *obj, Evas_Object_Intercept_Hide_Cb func) EINA_ARG_NONNULL(1, 2);

/**
 * Set the callback function that intercepts a move event of a object.
 *
 * @param obj The given canvas object pointer.
 * @param func The given function to be the callback function.
 * @param data The data passed to the callback function.
 *
 * This function sets a callback function to intercepts a move event
 * of a canvas object.
 *
 * @see evas_object_intercept_move_callback_del().
 *
 */
EAPI void  evas_object_intercept_move_callback_add(Evas_Object *obj, Evas_Object_Intercept_Move_Cb func, const void *data) EINA_ARG_NONNULL(1, 2);

/**
 * Unset the callback function that intercepts a move event of a
 * object.
 *
 * @param obj The given canvas object pointer.
 * @param func The given callback function.
 *
 * This function sets a callback function to intercepts a move event
 * of a canvas object.
 *
 * @see evas_object_intercept_move_callback_add().
 *
 */
EAPI void *evas_object_intercept_move_callback_del(Evas_Object *obj, Evas_Object_Intercept_Move_Cb func) EINA_ARG_NONNULL(1, 2);

EAPI void  evas_object_intercept_resize_callback_add(Evas_Object *obj, Evas_Object_Intercept_Resize_Cb func, const void *data) EINA_ARG_NONNULL(1, 2);
EAPI void *evas_object_intercept_resize_callback_del(Evas_Object *obj, Evas_Object_Intercept_Resize_Cb func) EINA_ARG_NONNULL(1, 2);
EAPI void  evas_object_intercept_raise_callback_add(Evas_Object *obj, Evas_Object_Intercept_Raise_Cb func, const void *data) EINA_ARG_NONNULL(1, 2);
EAPI void *evas_object_intercept_raise_callback_del(Evas_Object *obj, Evas_Object_Intercept_Raise_Cb func) EINA_ARG_NONNULL(1, 2);
EAPI void  evas_object_intercept_lower_callback_add(Evas_Object *obj, Evas_Object_Intercept_Lower_Cb func, const void *data) EINA_ARG_NONNULL(1, 2);
EAPI void *evas_object_intercept_lower_callback_del(Evas_Object *obj, Evas_Object_Intercept_Lower_Cb func) EINA_ARG_NONNULL(1, 2);
EAPI void  evas_object_intercept_stack_above_callback_add(Evas_Object *obj, Evas_Object_Intercept_Stack_Above_Cb func, const void *data) EINA_ARG_NONNULL(1, 2);
EAPI void *evas_object_intercept_stack_above_callback_del(Evas_Object *obj, Evas_Object_Intercept_Stack_Above_Cb func) EINA_ARG_NONNULL(1, 2);
EAPI void  evas_object_intercept_stack_below_callback_add(Evas_Object *obj, Evas_Object_Intercept_Stack_Below_Cb func, const void *data) EINA_ARG_NONNULL(1, 2);
EAPI void *evas_object_intercept_stack_below_callback_del(Evas_Object *obj, Evas_Object_Intercept_Stack_Below_Cb func) EINA_ARG_NONNULL(1, 2);
EAPI void  evas_object_intercept_layer_set_callback_add(Evas_Object *obj, Evas_Object_Intercept_Layer_Set_Cb func, const void *data) EINA_ARG_NONNULL(1, 2);
EAPI void *evas_object_intercept_layer_set_callback_del(Evas_Object *obj, Evas_Object_Intercept_Layer_Set_Cb func) EINA_ARG_NONNULL(1, 2);
EAPI void  evas_object_intercept_color_set_callback_add(Evas_Object *obj, Evas_Object_Intercept_Color_Set_Cb func, const void *data) EINA_ARG_NONNULL(1, 2);
EAPI void *evas_object_intercept_color_set_callback_del(Evas_Object *obj, Evas_Object_Intercept_Color_Set_Cb func) EINA_ARG_NONNULL(1, 2);
EAPI void  evas_object_intercept_clip_set_callback_add(Evas_Object *obj, Evas_Object_Intercept_Clip_Set_Cb func, const void *data) EINA_ARG_NONNULL(1, 2);
EAPI void *evas_object_intercept_clip_set_callback_del(Evas_Object *obj, Evas_Object_Intercept_Clip_Set_Cb func) EINA_ARG_NONNULL(1, 2);
EAPI void  evas_object_intercept_clip_unset_callback_add(Evas_Object *obj, Evas_Object_Intercept_Clip_Unset_Cb func, const void *data) EINA_ARG_NONNULL(1, 2);
EAPI void *evas_object_intercept_clip_unset_callback_del(Evas_Object *obj, Evas_Object_Intercept_Clip_Unset_Cb func) EINA_ARG_NONNULL(1, 2);
EAPI void  evas_object_intercept_focus_set_callback_add(Evas_Object *obj, Evas_Object_Intercept_Focus_Set_Cb func, const void *data) EINA_ARG_NONNULL(1, 2);
EAPI void *evas_object_intercept_focus_set_callback_del(Evas_Object *obj, Evas_Object_Intercept_Focus_Set_Cb func) EINA_ARG_NONNULL(1, 2);

/**
 * @}
 */

/**
 * @ingroup Evas_Object_Rectangle
 *
 * @{
 */

/**
 * Adds a rectangle to the given evas.
 * @param   e The given evas.
 * @return  The new rectangle object.
 *
 * @ingroup Evas_Object_Rectangle
 */
EAPI Evas_Object *evas_object_rectangle_add(Evas *e) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1) EINA_MALLOC;

/**
 * @}
 */

/**
 * @ingroup Evas_Object_Image
 *
 * @{
 */
/**
 * Creates a new image object on the given Evas @p e canvas.
 *
 * @param e The given canvas.
 * @return The created image object handle.
 *
 * @note If you intend to @b display an image somehow in a GUI,
 * besides binding it to a real image file/source (with
 * evas_object_image_file_set(), for example), you'll have to tell
 * this image object how to fill its space with the pixels it can get
 * from the source. See evas_object_image_filled_add(), for a helper
 * on the common case of scaling up an image source to the whole area
 * of the image object.
 *
 * @see evas_object_image_fill_set()
 *
 * Example:
 * @code
 * img = evas_object_image_add(canvas);
 * evas_object_image_file_set(img, "/path/to/img", NULL);
 * @endcode
 */
EAPI Evas_Object                  *evas_object_image_add(Evas *e) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1) EINA_MALLOC;

/**
 * Creates a new image object that @b automatically scales its bound
 * image to the object's area, on both axis.
 *
 * @param e The given canvas.
 * @return The created image object handle.
 *
 * This is a helper function around evas_object_image_add() and
 * evas_object_image_filled_set(). It has the same effect of applying
 * those functions in sequence, which is a very common use case.
 *
 * @note Whenever this object gets resized, the bound image will be
 * rescaled, too.
 *
 * @see evas_object_image_add()
 * @see evas_object_image_filled_set()
 * @see evas_object_image_fill_set()
 */
EAPI Evas_Object                  *evas_object_image_filled_add(Evas *e) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1) EINA_MALLOC;

/**
 * Sets the data for an image from memory to be loaded
 *
 * This is the same as evas_object_image_file_set() but the file to be loaded
 * may exist at an address in memory (the data for the file, not the filename
 * itself). The @p data at the address is copied and stored for future use, so
 * no @p data needs to be kept after this call is made. It will be managed and
 * freed for you when no longer needed. The @p size is limited to 2 gigabytes
 * in size, and must be greater than 0. A @c NULL @p data pointer is also
 * invalid. Set the filename to @c NULL to reset to empty state and have the
 * image file data freed from memory using evas_object_image_file_set().
 *
 * The @p format is optional (pass @c NULL if you don't need/use it). It is
 * used to help Evas guess better which loader to use for the data. It may
 * simply be the "extension" of the file as it would normally be on disk
 * such as "jpg" or "png" or "gif" etc.
 *
 * @param obj The given image object.
 * @param data The image file data address
 * @param size The size of the image file data in bytes
 * @param format The format of the file (optional), or @c NULL if not needed
 * @param key The image key in file, or @c NULL.
 */
EAPI void                          evas_object_image_memfile_set(Evas_Object *obj, void *data, int size, char *format, char *key) EINA_ARG_NONNULL(1, 2);

/**
 * Set the source file from where an image object must fetch the real
 * image data (it may be an Eet file, besides pure image ones).
 *
 * @param obj The given image object.
 * @param file The image file path.
 * @param key The image key in @p file (if its an Eet one), or @c
 * NULL, otherwise.
 *
 * If the file supports multiple data stored in it (as Eet files do),
 * you can specify the key to be used as the index of the image in
 * this file.
 *
 * Example:
 * @code
 * img = evas_object_image_add(canvas);
 * evas_object_image_file_set(img, "/path/to/img", NULL);
 * err = evas_object_image_load_error_get(img);
 * if (err != EVAS_LOAD_ERROR_NONE)
 *   {
 *      fprintf(stderr, "could not load image '%s'. error string is \"%s\"\n",
 *              valid_path, evas_load_error_str(err));
 *   }
 * else
 *   {
 *      evas_object_image_fill_set(img, 0, 0, w, h);
 *      evas_object_resize(img, w, h);
 *      evas_object_show(img);
 *   }
 * @endcode
 */
EAPI void                          evas_object_image_file_set(Evas_Object *obj, const char *file, const char *key) EINA_ARG_NONNULL(1);

/**
 * Set the source mmaped file from where an image object must fetch the real
 * image data (it must be an Eina_File).
 *
 * @param obj The given image object.
 * @param f The mmaped file
 * @param key The image key in @p file (if its an Eet one), or @c
 * NULL, otherwise.
 *
 * If the file supports multiple data stored in it (as Eet files do),
 * you can specify the key to be used as the index of the image in
 * this file.
 *
 * @since 1.8
 */
EAPI void                          evas_object_image_mmap_set(Evas_Object *obj, const Eina_File *f, const char *key);

/**
 * Retrieve the source file from where an image object is to fetch the
 * real image data (it may be an Eet file, besides pure image ones).
 *
 * @param obj The given image object.
 * @param file Location to store the image file path.
 * @param key Location to store the image key (if @p file is an Eet
 * one).
 *
 * You must @b not modify the strings on the returned pointers.
 *
 * @note Use @c NULL pointers on the file components you're not
 * interested in: they'll be ignored by the function.
 */
EAPI void                          evas_object_image_file_get(const Evas_Object *obj, const char **file, const char **key) EINA_ARG_NONNULL(1, 2);

/**
 * Set the dimensions for an image object's border, a region which @b
 * won't ever be scaled together with its center.
 *
 * @param obj The given image object.
 * @param l The border's left width.
 * @param r The border's right width.
 * @param t The border's top width.
 * @param b The border's bottom width.
 *
 * When Evas is rendering, an image source may be scaled to fit the
 * size of its image object. This function sets an area from the
 * borders of the image inwards which is @b not to be scaled. This
 * function is useful for making frames and for widget theming, where,
 * for example, buttons may be of varying sizes, but their border size
 * must remain constant.
 *
 * The units used for @p l, @p r, @p t and @p b are canvas units.
 *
 * @note The border region itself @b may be scaled by the
 * evas_object_image_border_scale_set() function.
 *
 * @note By default, image objects have no borders set, i. e. @c l, @c
 * r, @c t and @c b start as @c 0.
 *
 * See the following figures for visual explanation:\n
 * @htmlonly
 * <img src="image-borders.png" style="max-width: 100%;" />
 * <a href="image-borders.png">Full-size</a>
 * @endhtmlonly
 * @image rtf image-borders.png
 * @image latex image-borders.eps width=\textwidth
 * @htmlonly
 * <img src="border-effect.png" style="max-width: 100%;" />
 * <a href="border-effect.png">Full-size</a>
 * @endhtmlonly
 * @image rtf border-effect.png
 * @image latex border-effect.eps width=\textwidth
 *
 * @see evas_object_image_border_get()
 * @see evas_object_image_border_center_fill_set()
 */
EAPI void                          evas_object_image_border_set(Evas_Object *obj, int l, int r, int t, int b) EINA_ARG_NONNULL(1);

/**
 * Retrieve the dimensions for an image object's border, a region
 * which @b won't ever be scaled together with its center.
 *
 * @param obj The given image object.
 * @param l Location to store the border's left width in.
 * @param r Location to store the border's right width in.
 * @param t Location to store the border's top width in.
 * @param b Location to store the border's bottom width in.
 *
 * @note Use @c NULL pointers on the border components you're not
 * interested in: they'll be ignored by the function.
 *
 * See @ref evas_object_image_border_set() for more details.
 */
EAPI void                          evas_object_image_border_get(const Evas_Object *obj, int *l, int *r, int *t, int *b) EINA_ARG_NONNULL(1);

/**
 * Sets @b how the center part of the given image object (not the
 * borders) should be drawn when Evas is rendering it.
 *
 * @param obj The given image object.
 * @param fill Fill mode of the center region of @p obj (a value in
 * #Evas_Border_Fill_Mode).
 *
 * This function sets how the center part of the image object's source
 * image is to be drawn, which must be one of the values in
 * #Evas_Border_Fill_Mode. By center we mean the complementary part of
 * that defined by evas_object_image_border_set(). This one is very
 * useful for making frames and decorations. You would most probably
 * also be using a filled image (as in evas_object_image_filled_set())
 * to use as a frame.
 *
 * @see evas_object_image_border_center_fill_get()
 */
EAPI void                          evas_object_image_border_center_fill_set(Evas_Object *obj, Evas_Border_Fill_Mode fill) EINA_ARG_NONNULL(1);

/**
 * Retrieves @b how the center part of the given image object (not the
 * borders) is to be drawn when Evas is rendering it.
 *
 * @param obj The given image object.
 * @return fill Fill mode of the center region of @p obj (a value in
 * #Evas_Border_Fill_Mode).
 *
 * See @ref evas_object_image_fill_set() for more details.
 */
EAPI Evas_Border_Fill_Mode         evas_object_image_border_center_fill_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Set whether the image object's fill property should track the
 * object's size.
 *
 * @param obj The given image object.
 * @param setting @c EINA_TRUE, to make the fill property follow
 *        object size or @c EINA_FALSE, otherwise.
 *
 * If @p setting is @c EINA_TRUE, then every evas_object_resize() will
 * @b automatically trigger a call to evas_object_image_fill_set()
 * with the that new size (and @c 0, @c 0 as source image's origin),
 * so the bound image will fill the whole object's area.
 *
 * @see evas_object_image_filled_add()
 * @see evas_object_image_fill_get()
 */
EAPI void                          evas_object_image_filled_set(Evas_Object *obj, Eina_Bool setting) EINA_ARG_NONNULL(1);

/**
 * Retrieve whether the image object's fill property should track the
 * object's size.
 *
 * @param obj The given image object.
 * @return @c EINA_TRUE if it is tracking, @c EINA_FALSE, if not (and
 *         evas_object_fill_set() must be called manually).
 *
 * @see evas_object_image_filled_set() for more information
 */
EAPI Eina_Bool                     evas_object_image_filled_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Sets the scaling factor (multiplier) for the borders of an image
 * object.
 *
 * @param obj The given image object.
 * @param scale The scale factor (default is @c 1.0 - i.e. no scaling)
 *
 * @see evas_object_image_border_set()
 * @see evas_object_image_border_scale_get()
 */
EAPI void                          evas_object_image_border_scale_set(Evas_Object *obj, double scale);

/**
 * Retrieves the scaling factor (multiplier) for the borders of an
 * image object.
 *
 * @param obj The given image object.
 * @return The scale factor set for its borders
 *
 * @see evas_object_image_border_set()
 * @see evas_object_image_border_scale_set()
 */
EAPI double                        evas_object_image_border_scale_get(const Evas_Object *obj);

/**
 * Set how to fill an image object's drawing rectangle given the
 * (real) image bound to it.
 *
 * @param obj The given image object to operate on.
 * @param x The x coordinate (from the top left corner of the bound
 *          image) to start drawing from.
 * @param y The y coordinate (from the top left corner of the bound
 *          image) to start drawing from.
 * @param w The width the bound image will be displayed at.
 * @param h The height the bound image will be displayed at.
 *
 * Note that if @p w or @p h are smaller than the dimensions of
 * @p obj, the displayed image will be @b tiled around the object's
 * area. To have only one copy of the bound image drawn, @p x and @p y
 * must be 0 and @p w and @p h need to be the exact width and height
 * of the image object itself, respectively.
 *
 * See the following image to better understand the effects of this
 * call. On this diagram, both image object and original image source
 * have @c a x @c a dimensions and the image itself is a circle, with
 * empty space around it:
 *
 * @image html image-fill.png
 * @image rtf image-fill.png
 * @image latex image-fill.eps
 *
 * @warning The default values for the fill parameters are @p x = 0,
 * @p y = 0, @p w = 0 and @p h = 0. Thus, if you're not using the
 * evas_object_image_filled_add() helper and want your image
 * displayed, you'll have to set valid values with this function on
 * your object.
 *
 * @note evas_object_image_filled_set() is a helper function which
 * will @b override the values set here automatically, for you, in a
 * given way.
 */
EAPI void                          evas_object_image_fill_set(Evas_Object *obj, Evas_Coord x, Evas_Coord y, Evas_Coord w, Evas_Coord h) EINA_ARG_NONNULL(1);

/**
 * Retrieve how an image object is to fill its drawing rectangle,
 * given the (real) image bound to it.
 *
 * @param obj The given image object.
 * @param x Location to store the x coordinate (from the top left
 *          corner of the bound image) to start drawing from.
 * @param y Location to store the y coordinate (from the top left
 *          corner of the bound image) to start drawing from.
 * @param w Location to store the width the bound image is to be
 *          displayed at.
 * @param h Location to store the height the bound image is to be
 *          displayed at.
 *
 * @note Use @c NULL pointers on the fill components you're not
 * interested in: they'll be ignored by the function.
 *
 * See @ref evas_object_image_fill_set() for more details.
 */
EAPI void                          evas_object_image_fill_get(const Evas_Object *obj, Evas_Coord *x, Evas_Coord *y, Evas_Coord *w, Evas_Coord *h) EINA_ARG_NONNULL(1);

/**
 * Sets the tiling mode for the given evas image object's fill.
 * @param   obj   The given evas image object.
 * @param   spread One of EVAS_TEXTURE_REFLECT, EVAS_TEXTURE_REPEAT,
 * EVAS_TEXTURE_RESTRICT, or EVAS_TEXTURE_PAD.
 */
EAPI void                          evas_object_image_fill_spread_set(Evas_Object *obj, Evas_Fill_Spread spread) EINA_ARG_NONNULL(1);

/**
 * Retrieves the spread (tiling mode) for the given image object's
 * fill.
 *
 * @param   obj The given evas image object.
 * @return  The current spread mode of the image object.
 */
EAPI Evas_Fill_Spread              evas_object_image_fill_spread_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Sets the size of the given image object.
 *
 * @param obj The given image object.
 * @param w The new width of the image.
 * @param h The new height of the image.
 *
 * This function will scale down or crop the image so that it is
 * treated as if it were at the given size. If the size given is
 * smaller than the image, it will be cropped. If the size given is
 * larger, then the image will be treated as if it were in the upper
 * left hand corner of a larger image that is otherwise transparent.
 */
EAPI void                          evas_object_image_size_set(Evas_Object *obj, int w, int h) EINA_ARG_NONNULL(1);

/**
 * Retrieves the size of the given image object.
 *
 * @param obj The given image object.
 * @param w Location to store the width of the image in, or @c NULL.
 * @param h Location to store the height of the image in, or @c NULL.
 *
 * See @ref evas_object_image_size_set() for more details.
 */
EAPI void                          evas_object_image_size_get(const Evas_Object *obj, int *w, int *h) EINA_ARG_NONNULL(1);

/**
 * Retrieves the row stride of the given image object.
 *
 * @param obj The given image object.
 * @return The stride of the image (<b>in bytes</b>).
 *
 * The row stride is the number of bytes between the start of a row
 * and the start of the next row for image data.
 */
EAPI int                           evas_object_image_stride_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Retrieves a number representing any error that occurred during the
 * last loading of the given image object's source image.
 *
 * @param obj The given image object.
 * @return A value giving the last error that occurred. It should be
 *         one of the #Evas_Load_Error values. #EVAS_LOAD_ERROR_NONE
 *         is returned if there was no error.
 */
EAPI Evas_Load_Error               evas_object_image_load_error_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Sets the raw image data of the given image object.
 *
 * @param obj The given image object.
 * @param data The raw data, or @c NULL.
 *
 * Note that the raw data must be of the same size (see
 * evas_object_image_size_set(), which has to be called @b before this
 * one) and colorspace (see evas_object_image_colorspace_set()) of the
 * image. If data is @c NULL, the current image data will be
 * freed. Naturally, if one does not set an image object's data
 * manually, it will still have one, allocated by Evas.
 *
 * @see evas_object_image_data_get()
 */
EAPI void                          evas_object_image_data_set(Evas_Object *obj, void *data) EINA_ARG_NONNULL(1);

/**
 * Get a pointer to the raw image data of the given image object.
 *
 * @param obj The given image object.
 * @param for_writing Whether the data being retrieved will be
 *        modified (@c EINA_TRUE) or not (@c EINA_FALSE).
 * @return The raw image data.
 *
 * This function returns a pointer to an image object's internal pixel
 * buffer, for reading only or read/write. If you request it for
 * writing, the image will be marked dirty so that it gets redrawn at
 * the next update.
 *
 * Each time you call this function on an image object, its data
 * buffer will have an internal reference counter
 * incremented. Decrement it back by using
 * evas_object_image_data_set().
 *
 * This is best suited for when you want to modify an existing image,
 * without changing its dimensions.
 *
 * @note The contents' format returned by it depend on the color
 * space of the given image object.
 *
 * @note You may want to use evas_object_image_data_update_add() to
 * inform data changes, if you did any.
 *
 * @see evas_object_image_data_set()
 */
EAPI void                         *evas_object_image_data_get(const Evas_Object *obj, Eina_Bool for_writing) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Converts the raw image data of the given image object to the
 * specified colorspace.
 *
 * Note that this function does not modify the raw image data.  If the
 * requested colorspace is the same as the image colorspace nothing is
 * done and @c NULL is returned. You should use
 * evas_object_image_colorspace_get() to check the current image
 * colorspace.
 *
 * See @ref evas_object_image_colorspace_get.
 *
 * @param obj The given image object.
 * @param to_cspace The colorspace to which the image raw data will be converted.
 * @return data A newly allocated data in the format specified by to_cspace.
 */
EAPI void                         *evas_object_image_data_convert(Evas_Object *obj, Evas_Colorspace to_cspace) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Replaces the raw image data of the given image object.
 *
 * @param obj The given image object.
 * @param data The raw data to replace.
 *
 * This function lets the application replace an image object's
 * internal pixel buffer with an user-allocated one. For best results,
 * you should generally first call evas_object_image_size_set() with
 * the width and height for the new buffer.
 *
 * This call is best suited for when you will be using image data with
 * different dimensions than the existing image data, if any. If you
 * only need to modify the existing image in some fashion, then using
 * evas_object_image_data_get() is probably what you are after.
 *
 * Note that the caller is responsible for freeing the buffer when
 * finished with it, as user-set image data will not be automatically
 * freed when the image object is deleted.
 *
 * See @ref evas_object_image_data_get() for more details.
 *
 */
EAPI void                          evas_object_image_data_copy_set(Evas_Object *obj, void *data) EINA_ARG_NONNULL(1);

/**
 * Mark a sub-region of the given image object to be redrawn.
 *
 * @param obj The given image object.
 * @param x X-offset of the region to be updated.
 * @param y Y-offset of the region to be updated.
 * @param w Width of the region to be updated.
 * @param h Height of the region to be updated.
 *
 * This function schedules a particular rectangular region of an image
 * object to be updated (redrawn) at the next rendering cycle.
 */
EAPI void                          evas_object_image_data_update_add(Evas_Object *obj, int x, int y, int w, int h) EINA_ARG_NONNULL(1);

/**
 * Enable or disable alpha channel usage on the given image object.
 *
 * @param obj The given image object.
 * @param has_alpha Whether to use alpha channel (@c EINA_TRUE) data
 * or not (@c EINA_FALSE).
 *
 * This function sets a flag on an image object indicating whether or
 * not to use alpha channel data. A value of @c EINA_TRUE makes it use
 * alpha channel data, and @c EINA_FALSE makes it ignore that
 * data. Note that this has nothing to do with an object's color as
 * manipulated by evas_object_color_set().
 *
 * @see evas_object_image_alpha_get()
 */
EAPI void                          evas_object_image_alpha_set(Evas_Object *obj, Eina_Bool has_alpha) EINA_ARG_NONNULL(1);

/**
 * Retrieve whether alpha channel data is being used on the given
 * image object.
 *
 * @param obj The given image object.
 * @return Whether the alpha channel data is being used (@c EINA_TRUE)
 * or not (@c EINA_FALSE).
 *
 * This function returns @c EINA_TRUE if the image object's alpha
 * channel is being used, or @c EINA_FALSE otherwise.
 *
 * See @ref evas_object_image_alpha_set() for more details.
 */
EAPI Eina_Bool                     evas_object_image_alpha_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Sets whether to use high-quality image scaling algorithm on the
 * given image object.
 *
 * @param obj The given image object.
 * @param smooth_scale Whether to use smooth scale or not.
 *
 * When enabled, a higher quality image scaling algorithm is used when
 * scaling images to sizes other than the source image's original
 * one. This gives better results but is more computationally
 * expensive.
 *
 * @note Image objects get created originally with smooth scaling @b
 * on.
 *
 * @see evas_object_image_smooth_scale_get()
 */
EAPI void                          evas_object_image_smooth_scale_set(Evas_Object *obj, Eina_Bool smooth_scale) EINA_ARG_NONNULL(1);

/**
 * Retrieves whether the given image object is using high-quality
 * image scaling algorithm.
 *
 * @param obj The given image object.
 * @return Whether smooth scale is being used.
 *
 * See @ref evas_object_image_smooth_scale_set() for more details.
 */
EAPI Eina_Bool                     evas_object_image_smooth_scale_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Preload an image object's image data in the background
 *
 * @param obj The given image object.
 * @param cancel @c EINA_FALSE will add it the preloading work queue,
 *               @c EINA_TRUE will remove it (if it was issued before).
 *
 * This function requests the preload of the data image in the
 * background. The work is queued before being processed (because
 * there might be other pending requests of this type).
 *
 * Whenever the image data gets loaded, Evas will call
 * #EVAS_CALLBACK_IMAGE_PRELOADED registered callbacks on @p obj (what
 * may be immediately, if the data was already preloaded before).
 *
 * Use @c EINA_TRUE for @p cancel on scenarios where you don't need
 * the image data preloaded anymore.
 *
 * @note Any evas_object_show() call after evas_object_image_preload()
 * will make the latter to be @b cancelled, with the loading process
 * now taking place @b synchronously (and, thus, blocking the return
 * of the former until the image is loaded). It is highly advisable,
 * then, that the user preload an image with it being @b hidden, just
 * to be shown on the #EVAS_CALLBACK_IMAGE_PRELOADED event's callback.
 */
EAPI void                          evas_object_image_preload(Evas_Object *obj, Eina_Bool cancel) EINA_ARG_NONNULL(1);

/**
 * Reload an image object's image data.
 *
 * @param obj The given image object pointer.
 *
 * This function reloads the image data bound to image object @p obj.
 */
EAPI void                          evas_object_image_reload(Evas_Object *obj) EINA_ARG_NONNULL(1);

/**
 * Save the given image object's contents to an (image) file.
 *
 * @param obj The given image object.
 * @param file The filename to be used to save the image (extension
 *        obligatory).
 * @param key The image key in the file (if an Eet one), or @c NULL,
 *        otherwise.
 * @param flags String containing the flags to be used (@c NULL for
 *        none).
 *
 * The extension suffix on @p file will determine which <b>saver
 * module</b> Evas is to use when saving, thus the final file's
 * format. If the file supports multiple data stored in it (Eet ones),
 * you can specify the key to be used as the index of the image in it.
 *
 * You can specify some flags when saving the image.  Currently
 * acceptable flags are @c quality and @c compress. Eg.: @c
 * "quality=100 compress=9"
 */
EAPI Eina_Bool                     evas_object_image_save(const Evas_Object *obj, const char *file, const char *key, const char *flags)  EINA_ARG_NONNULL(1, 2);

/**
 * Import pixels from given source to a given canvas image object.
 *
 * @param obj The given canvas object.
 * @param pixels The pixel's source to be imported.
 *
 * This function imports pixels from a given source to a given canvas image.
 *
 */
EAPI Eina_Bool                     evas_object_image_pixels_import(Evas_Object *obj, Evas_Pixel_Import_Source *pixels) EINA_ARG_NONNULL(1, 2);

/**
 * Set the callback function to get pixels from a canvas' image.
 *
 * @param obj The given canvas pointer.
 * @param func The callback function.
 * @param data The data pointer to be passed to @a func.
 *
 * This functions sets a function to be the callback function that get
 * pixels from a image of the canvas.
 *
 */
EAPI void                          evas_object_image_pixels_get_callback_set(Evas_Object *obj, Evas_Object_Image_Pixels_Get_Cb func, void *data) EINA_ARG_NONNULL(1, 2);

/**
 * Mark whether the given image object is dirty and needs to request its pixels.
 *
 * @param obj The given image object.
 * @param dirty Whether the image is dirty.
 *
 * This function will only properly work if a pixels get callback has been set.
 *
 * @warning use this function if you really know what you are doing.
 *
 * @see evas_object_image_pixels_get_callback_set()
 */
EAPI void                          evas_object_image_pixels_dirty_set(Evas_Object *obj, Eina_Bool dirty) EINA_ARG_NONNULL(1);

/**
 * Retrieves whether the given image object is dirty (needs to be redrawn).
 *
 * @param obj The given image object.
 * @return Whether the image is dirty.
 */
EAPI Eina_Bool                     evas_object_image_pixels_dirty_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Set the DPI resolution of an image object's source image.
 *
 * @param obj The given canvas pointer.
 * @param dpi The new DPI resolution.
 *
 * This function sets the DPI resolution of a given loaded canvas
 * image. Most useful for the SVG image loader.
 *
 * @see evas_object_image_load_dpi_get()
 */
EAPI void                          evas_object_image_load_dpi_set(Evas_Object *obj, double dpi) EINA_ARG_NONNULL(1);

/**
 * Get the DPI resolution of a loaded image object in the canvas.
 *
 * @param obj The given canvas pointer.
 * @return The DPI resolution of the given canvas image.
 *
 * This function returns the DPI resolution of the given canvas image.
 *
 * @see evas_object_image_load_dpi_set() for more details
 */
EAPI double                        evas_object_image_load_dpi_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Set the size of a given image object's source image, when loading
 * it.
 *
 * @param obj The given canvas object.
 * @param w The new width of the image's load size.
 * @param h The new height of the image's load size.
 *
 * This function sets a new (loading) size for the given canvas
 * image.
 *
 * @see evas_object_image_load_size_get()
 */
EAPI void                          evas_object_image_load_size_set(Evas_Object *obj, int w, int h) EINA_ARG_NONNULL(1);

/**
 * Get the size of a given image object's source image, when loading
 * it.
 *
 * @param obj The given image object.
 * @param w Where to store the new width of the image's load size.
 * @param h Where to store the new height of the image's load size.
 *
 * @note Use @c NULL pointers on the size components you're not
 * interested in: they'll be ignored by the function.
 *
 * @see evas_object_image_load_size_set() for more details
 */
EAPI void                          evas_object_image_load_size_get(const Evas_Object *obj, int *w, int *h) EINA_ARG_NONNULL(1);

/**
 * Set the scale down factor of a given image object's source image,
 * when loading it.
 *
 * @param obj The given image object pointer.
 * @param scale_down The scale down factor.
 *
 * This function sets the scale down factor of a given canvas
 * image. Most useful for the SVG image loader.
 *
 * @see evas_object_image_load_scale_down_get()
 */
EAPI void                          evas_object_image_load_scale_down_set(Evas_Object *obj, int scale_down) EINA_ARG_NONNULL(1);

/**
 * get the scale down factor of a given image object's source image,
 * when loading it.
 *
 * @param obj The given image object pointer.
 *
 * @see evas_object_image_load_scale_down_set() for more details
 */
EAPI int                           evas_object_image_load_scale_down_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Inform a given image object to load a selective region of its
 * source image.
 *
 * @param obj The given image object pointer.
 * @param x X-offset of the region to be loaded.
 * @param y Y-offset of the region to be loaded.
 * @param w Width of the region to be loaded.
 * @param h Height of the region to be loaded.
 *
 * This function is useful when one is not showing all of an image's
 * area on its image object.
 *
 * @note The image loader for the image format in question has to
 * support selective region loading in order to this function to take
 * effect.
 *
 * @see evas_object_image_load_region_get()
 */
EAPI void                          evas_object_image_load_region_set(Evas_Object *obj, int x, int y, int w, int h) EINA_ARG_NONNULL(1);

/**
 * Retrieve the coordinates of a given image object's selective
 * (source image) load region.
 *
 * @param obj The given image object pointer.
 * @param x Where to store the X-offset of the region to be loaded.
 * @param y Where to store the Y-offset of the region to be loaded.
 * @param w Where to store the width of the region to be loaded.
 * @param h Where to store the height of the region to be loaded.
 *
 * @note Use @c NULL pointers on the coordinates you're not interested
 * in: they'll be ignored by the function.
 *
 * @see evas_object_image_load_region_get()
 */
EAPI void                          evas_object_image_load_region_get(const Evas_Object *obj, int *x, int *y, int *w, int *h) EINA_ARG_NONNULL(1);

/**
 * Define if the orientation information in the image file should be honored.
 *
 * @param obj The given image object pointer.
 * @param enable @c EINA_TRUE means that it should honor the orientation information
 * @since 1.1
 */
EAPI void                          evas_object_image_load_orientation_set(Evas_Object *obj, Eina_Bool enable) EINA_ARG_NONNULL(1);

/**
 * Get if the orientation information in the image file should be honored.
 *
 * @param obj The given image object pointer.
 * @since 1.1
 */
EAPI Eina_Bool                     evas_object_image_load_orientation_get(const Evas_Object *obj) EINA_ARG_NONNULL(1);

/**
 * Set the colorspace of a given image of the canvas.
 *
 * @param obj The given image object pointer.
 * @param cspace The new color space.
 *
 * This function sets the colorspace of given canvas image.
 *
 */
EAPI void                          evas_object_image_colorspace_set(Evas_Object *obj, Evas_Colorspace cspace) EINA_ARG_NONNULL(1);

/**
 * Get the colorspace of a given image of the canvas.
 *
 * @param obj The given image object pointer.
 * @return The colorspace of the image.
 *
 * This function returns the colorspace of given canvas image.
 *
 */
EAPI Evas_Colorspace               evas_object_image_colorspace_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Get the support state of a given image
 *
 * @param obj The given image object pointer
 * @return The region support state
 * @since 1.2
 *
 * This function returns the state of the region support of given image
 */
EAPI Eina_Bool                     evas_object_image_region_support_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Set the native surface of a given image of the canvas
 *
 * @param obj The given canvas pointer.
 * @param surf The new native surface.
 *
 * This function sets a native surface of a given canvas image.
 *
 */
EAPI void                          evas_object_image_native_surface_set(Evas_Object *obj, Evas_Native_Surface *surf) EINA_ARG_NONNULL(1, 2);

/**
 * Get the native surface of a given image of the canvas
 *
 * @param obj The given canvas pointer.
 * @return The native surface of the given canvas image.
 *
 * This function returns the native surface of a given canvas image.
 *
 */
EAPI Evas_Native_Surface          *evas_object_image_native_surface_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Set the video surface linked to a given image of the canvas
 *
 * @param obj The given canvas pointer.
 * @param surf The new video surface.
 * @since 1.1
 *
 * This function links a video surface to a given canvas image.
 *
 */
EAPI void                          evas_object_image_video_surface_set(Evas_Object *obj, Evas_Video_Surface *surf) EINA_ARG_NONNULL(1);

/**
 * Get the video surface linekd to a given image of the canvas
 *
 * @param obj The given canvas pointer.
 * @return The video surface of the given canvas image.
 * @since 1.1
 *
 * This function returns the video surface linked to a given canvas image.
 *
 */
EAPI const Evas_Video_Surface     *evas_object_image_video_surface_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

EAPI void evas_object_image_video_surface_caps_set(Evas_Object *obj, unsigned int caps) EINA_ARG_NONNULL(1);
EAPI unsigned int evas_object_image_video_surface_caps_get(const Evas_Object *obj) EINA_ARG_NONNULL(1);

/**
 * Set the scale hint of a given image of the canvas.
 *
 * @param obj The given image object pointer.
 * @param hint The scale hint, a value in
 * #Evas_Image_Scale_Hint.
 *
 * This function sets the scale hint value of the given image object
 * in the canvas, which will affect how Evas is to cache scaled
 * versions of its original source image.
 *
 * @see evas_object_image_scale_hint_get()
 */
EAPI void                          evas_object_image_scale_hint_set(Evas_Object *obj, Evas_Image_Scale_Hint hint) EINA_ARG_NONNULL(1);

/**
 * Get the scale hint of a given image of the canvas.
 *
 * @param obj The given image object pointer.
 * @return The scale hint value set on @p obj, a value in
 * #Evas_Image_Scale_Hint.
 *
 * This function returns the scale hint value of the given image
 * object of the canvas.
 *
 * @see evas_object_image_scale_hint_set() for more details.
 */
EAPI Evas_Image_Scale_Hint         evas_object_image_scale_hint_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Set the content hint setting of a given image object of the canvas.
 *
 * @param obj The given canvas pointer.
 * @param hint The content hint value, one of the
 * #Evas_Image_Content_Hint ones.
 *
 * This function sets the content hint value of the given image of the
 * canvas. For example, if you're on the GL engine and your driver
 * implementation supports it, setting this hint to
 * #EVAS_IMAGE_CONTENT_HINT_DYNAMIC will make it need @b zero copies
 * at texture upload time, which is an "expensive" operation.
 *
 * @see evas_object_image_content_hint_get()
 */
EAPI void                          evas_object_image_content_hint_set(Evas_Object *obj, Evas_Image_Content_Hint hint) EINA_ARG_NONNULL(1);

/**
 * Get the content hint setting of a given image object of the canvas.
 *
 * @param obj The given canvas pointer.
 * @return hint The content hint value set on it, one of the
 * #Evas_Image_Content_Hint ones (#EVAS_IMAGE_CONTENT_HINT_NONE means
 * an error).
 *
 * This function returns the content hint value of the given image of
 * the canvas.
 *
 * @see evas_object_image_content_hint_set()
 */
EAPI Evas_Image_Content_Hint       evas_object_image_content_hint_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Enable an image to be used as an alpha mask.
 *
 * This will set any flags, and discard any excess image data not used as an
 * alpha mask.
 *
 * Note there is little point in using a image as alpha mask unless it has an
 * alpha channel.
 *
 * @param obj Object to use as an alpha mask.
 * @param ismask Use image as alphamask, must be true.
 */
EAPI void                          evas_object_image_alpha_mask_set(Evas_Object *obj, Eina_Bool ismask) EINA_ARG_NONNULL(1);

/**
 * Set the source object on an image object to used as a @b proxy.
 *
 * @param obj Proxy (image) object.
 * @param src Source object to use for the proxy.
 * @return @c EINA_TRUE on success, @c EINA_FALSE on error.
 *
 * If an image object is set to behave as a @b proxy, it will mirror
 * the rendering contents of a given @b source object in its drawing
 * region, without affecting that source in any way. The source must
 * be another valid Evas object. Other effects may be applied to the
 * proxy, such as a map (see evas_object_map_set()) to create a
 * reflection of the original object (for example).
 *
 * Any existing source object on @p obj will be removed after this
 * call. Setting @p src to @c NULL clears the proxy object (not in
 * "proxy state" anymore).
 *
 * @warning You cannot set a proxy as another proxy's source.
 *
 * @see evas_object_image_source_get()
 * @see evas_object_image_source_unset()
 * @see evas_object_image_source_visible_set()
 */
EAPI Eina_Bool                     evas_object_image_source_set(Evas_Object *obj, Evas_Object *src) EINA_ARG_NONNULL(1);

/**
 * Get the current source object of an image object.
 *
 * @param obj Image object
 * @return Source object (if any), or @c NULL, if not in "proxy mode"
 * (or on errors).
 *
 * @see evas_object_image_source_set() for more details
 */
EAPI Evas_Object                  *evas_object_image_source_get(const Evas_Object *obj) EINA_ARG_NONNULL(1);

/**
 * Clear the source object on a proxy image object.
 *
 * @param obj Image object to clear source of.
 * @return @c EINA_TRUE on success, @c EINA_FALSE on error.
 *
 * This is equivalent to calling evas_object_image_source_set() with a
 * @c NULL source.
 */
EAPI Eina_Bool                     evas_object_image_source_unset(Evas_Object *obj) EINA_ARG_NONNULL(1);

/**
 * Set the source object to be visible or not.
 *
 * @param obj Proxy (image) object.
 * @param visible @c EINA_TRUE is source object to be shown, @c EINA_FALSE 
 * otherwise.
 *
 * If the @p visible set to @c EINA_FALSE, the source object of the proxy(@p obj
 * ) will be invisible.
 *
 * This API works differently to evas_object_show() and evas_object_hide().
 * Once source object is hidden by evas_object_hide() then the proxy object will
 * be hidden as well. Actually in this case both objects are excluded from the
 * Evas internal update circle.
 *
 * By this API, instead, one can toggle the visibility of a proxy's source
 * object remaining the proxy visibility untouched.
 *
 * @warning If the all of proxies are deleted, then the source visibility of the
 * source object will be cancelled.
 *
 * @see evas_object_image_source_visible_get()
 * @see evas_object_image_source_set()
 * @see evas_object_show()
 * @see evas_object_hide()
 * @since 1.8
 */
EAPI void                          evas_object_image_source_visible_set(Evas_Object *obj, Eina_Bool visible) EINA_ARG_NONNULL(1);

/**
 * Get the state of the source object visibility.
 *
 * @param obj Proxy (image) object.
 * @return @c EINA_TRUE if source object is visible, @c EINA_FALSE otherwise.
 *
 * @see evas_object_image_source_visible_set()
 * @see evas_object_image_source_set()
 * @see evas_object_show()
 * @see evas_object_hide()
 * @since 1.8
 */
EAPI Eina_Bool                     evas_object_image_source_visible_get(const Evas_Object *obj) EINA_ARG_NONNULL(1);

/**
 * Set whether an Evas object is to source events.
 *
 * @param obj Proxy (image) object.
 * @param source whether @p obj is to pass events (@c EINA_TRUE) or not
 * (@c EINA_FALSE)
 *
 * Set whether an Evas object is to repeat events to source.
 *
 * If @p source is @c EINA_TRUE, it will make events on @p obj to also be
 * repeated for the source object (see evas_object_image_source_set()). Even the
 * @p obj and source geometries are different, the event position will be
 * transformed to the source object's space.
 *
 * If @p source is @c EINA_FALSE, events occurring on @p obj will be
 * processed only on it.
 *
 * @see evas_object_image_source_get()
 * @see evas_object_image_source_visible_set()
 * @see evas_object_image_source_events_get()
 * @since 1.8
 */
EAPI void evas_object_image_source_events_set(Evas_Object *obj, Eina_Bool source) EINA_ARG_NONNULL(1);

/**
 * Determine whether an object is set to source events.
 *
 * @param obj Proxy (image) object.
 * @return @c EINA_TRUE if source object has events, @c EINA_FALSE otherwise.
 *
 * @see evas_object_image_source_set()
 * @see evas_object_image_source_visible_set()
 * @see evas_object_image_source_events_set()
 * @since 1.8
 */
EAPI Eina_Bool evas_object_image_source_events_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Clip the proxy object with the source object's clipper.
 *
 * @param obj Proxy (image) object.
 * @param source_clip whether @p obj is clipped by the source clipper.
 * (@c EINA_TRUE) or not (@c EINA_FALSE)
 *
 * @see evas_object_clip_set()
 * @see evas_object_image_source_set()
 * @since 1.8
 */
EAPI void evas_object_image_source_clip_set(Evas_Object *obj, Eina_Bool source_clip) EINA_ARG_NONNULL(1);

/**
 * Determine whether an object is clipped by source object's clipper.
 *
 * @param obj Proxy (image) object.
 * @return @c EINA_TRUE if source clip is enabled, @c EINA_FALSE otherwise.
 *
 * @see evas_object_clip_set()
 * @see evas_object_image_source_set()
 * @see evas_object_image_source_clip_set()
 * @since 1.8
 */
EAPI Eina_Bool evas_object_image_source_clip_get(const Evas_Object *obj) EINA_ARG_NONNULL(1);

/**
 * Check if an image object can be animated (have multiple frames)
 *
 * @param obj Image object
 * @return whether obj support animation
 *
 * This returns if the image file of an image object is capable of animation
 * such as an animated gif file might. This is only useful to be called once
 * the image object file has been set.
 *
 * Example:
 * @code
 * extern Evas_Object *obj;
 *
 * if (evas_object_image_animated_get(obj))
 *   {
 *     int frame_count;
 *     int loop_count;
 *     Evas_Image_Animated_Loop_Hint loop_type;
 *     double duration;
 *
 *     frame_count = evas_object_image_animated_frame_count_get(obj);
 *     printf("This image has %d frames\n",frame_count);
 *
 *     duration = evas_object_image_animated_frame_duration_get(obj,1,0);
 *     printf("Frame 1's duration is %f. You had better set object's frame to 2 after this duration using timer\n");
 *
 *     loop_count = evas_object_image_animated_loop_count_get(obj);
 *     printf("loop count is %d. You had better run loop %d times\n",loop_count,loop_count);
 *
 *     loop_type = evas_object_image_animated_loop_type_get(obj);
 *     if (loop_type == EVAS_IMAGE_ANIMATED_HINT_LOOP)
 *       printf("You had better set frame like 1->2->3->1->2->3...\n");
 *     else if (loop_type == EVAS_IMAGE_ANIMATED_HINT_PINGPONG)
 *       printf("You had better set frame like 1->2->3->2->1->2...\n");
 *     else
 *       printf("Unknown loop type\n");
 *
 *     evas_object_image_animated_frame_set(obj,1);
 *     printf("You set image object's frame to 1. You can see frame 1\n");
 *   }
 * @endcode
 *
 * @see evas_object_image_animated_get()
 * @see evas_object_image_animated_frame_count_get()
 * @see evas_object_image_animated_loop_type_get()
 * @see evas_object_image_animated_loop_count_get()
 * @see evas_object_image_animated_frame_duration_get()
 * @see evas_object_image_animated_frame_set()
 * @since 1.1
 */
EAPI Eina_Bool                     evas_object_image_animated_get(const Evas_Object *obj);

/**
 * Get the total number of frames of the image object.
 *
 * @param obj Image object
 * @return The number of frames
 *
 * This returns total number of frames the image object supports (if animated)
 *
 * @see evas_object_image_animated_get()
 * @see evas_object_image_animated_frame_count_get()
 * @see evas_object_image_animated_loop_type_get()
 * @see evas_object_image_animated_loop_count_get()
 * @see evas_object_image_animated_frame_duration_get()
 * @see evas_object_image_animated_frame_set()
 * @since 1.1
 */
EAPI int                           evas_object_image_animated_frame_count_get(const Evas_Object *obj);

/**
 * Get the kind of looping the image object does.
 *
 * @param obj Image object
 * @return Loop type of the image object
 *
 * This returns the kind of looping the image object wants to do.
 *
 * If it returns EVAS_IMAGE_ANIMATED_HINT_LOOP, you should display frames in a sequence like:
 * 1->2->3->1->2->3->1...
 * If it returns EVAS_IMAGE_ANIMATED_HINT_PINGPONG, it is better to
 * display frames in a sequence like: 1->2->3->2->1->2->3->1...
 *
 * The default type is EVAS_IMAGE_ANIMATED_HINT_LOOP.
 *
 * @see evas_object_image_animated_get()
 * @see evas_object_image_animated_frame_count_get()
 * @see evas_object_image_animated_loop_type_get()
 * @see evas_object_image_animated_loop_count_get()
 * @see evas_object_image_animated_frame_duration_get()
 * @see evas_object_image_animated_frame_set()
 * @since 1.1
 */
EAPI Evas_Image_Animated_Loop_Hint evas_object_image_animated_loop_type_get(const Evas_Object *obj);

/**
 * Get the number times the animation of the object loops.
 *
 * @param obj Image object
 * @return The number of loop of an animated image object
 *
 * This returns loop count of image. The loop count is the number of times
 * the animation will play fully from first to last frame until the animation
 * should stop (at the final frame).
 *
 * If 0 is returned, then looping should happen indefinitely (no limit to
 * the number of times it loops).
 *
 * @see evas_object_image_animated_get()
 * @see evas_object_image_animated_frame_count_get()
 * @see evas_object_image_animated_loop_type_get()
 * @see evas_object_image_animated_loop_count_get()
 * @see evas_object_image_animated_frame_duration_get()
 * @see evas_object_image_animated_frame_set()
 * @since 1.1
 */
EAPI int                           evas_object_image_animated_loop_count_get(const Evas_Object *obj);

/**
 * Get the duration of a sequence of frames.
 *
 * @param obj Image object
 * @param start_frame The first frame
 * @param fram_num Number of frames in the sequence
 *
 * This returns total duration that the specified sequence of frames should
 * take in seconds.
 *
 * If you set start_frame to 1 and frame_num 0, you get frame 1's duration
 * If you set start_frame to 1 and frame_num 1, you get frame 1's duration +
 * frame2's duration
 *
 * @see evas_object_image_animated_get()
 * @see evas_object_image_animated_frame_count_get()
 * @see evas_object_image_animated_loop_type_get()
 * @see evas_object_image_animated_loop_count_get()
 * @see evas_object_image_animated_frame_duration_get()
 * @see evas_object_image_animated_frame_set()
 * @since 1.1
 */
EAPI double                        evas_object_image_animated_frame_duration_get(const Evas_Object *obj, int start_frame, int fram_num);

/**
 * Set the frame to current frame of an image object
 *
 * @param obj The given image object.
 * @param frame_num The index of current frame
 *
 * This set image object's current frame to frame_num with 1 being the first
 * frame.
 *
 * @see evas_object_image_animated_get()
 * @see evas_object_image_animated_frame_count_get()
 * @see evas_object_image_animated_loop_type_get()
 * @see evas_object_image_animated_loop_count_get()
 * @see evas_object_image_animated_frame_duration_get()
 * @see evas_object_image_animated_frame_set()
 * @since 1.1
 */
EAPI void                          evas_object_image_animated_frame_set(Evas_Object *obj, int frame_num);
/**
 * @}
 */

/**
 * @ingroup Evas_Object_Text
 *
 * @{
 */

/**
 * Creates a new text object on the provided canvas.
 *
 * @param e The canvas to create the text object on.
 * @return @c NULL on error, a pointer to a new text object on
 * success.
 *
 * Text objects are for simple, single line text elements. If you want
 * more elaborated text blocks, see @ref Evas_Object_Textblock.
 *
 * @see evas_object_text_font_source_set()
 * @see evas_object_text_font_set()
 * @see evas_object_text_text_set()
 */
EAPI Evas_Object         *evas_object_text_add(Evas *e) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1) EINA_MALLOC;

/**
 * Set the font (source) file to be used on a given text object.
 *
 * @param obj The text object to set font for.
 * @param font The font file's path.
 *
 * This function allows the font file to be explicitly set for a given
 * text object, overriding system lookup, which will first occur in
 * the given file's contents.
 *
 * @see evas_object_text_font_get()
 */
EAPI void                 evas_object_text_font_source_set(Evas_Object *obj, const char *font) EINA_ARG_NONNULL(1);

/**
 * Get the font file's path which is being used on a given text
 * object.
 *
 * @param obj The text object to set font for.
 * @return The font file's path.
 *
 * @see evas_object_text_font_get() for more details
 */
EAPI const char          *evas_object_text_font_source_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Set the font family or filename, and size on a given text object.
 *
 * @param obj The text object to set font for.
 * @param font The font family name or filename.
 * @param size The font size, in points.
 *
 * This function allows the font name and size of a text object to be
 * set. The @p font string has to follow fontconfig's convention on
 * naming fonts, as it's the underlying library used to query system
 * fonts by Evas (see the @c fc-list command's output, on your system,
 * to get an idea). Alternatively, one can use a full path to a font file.
 *
 * @see evas_object_text_font_get()
 * @see evas_object_text_font_source_set()
 */
EAPI void                 evas_object_text_font_set(Evas_Object *obj, const char *font, Evas_Font_Size size) EINA_ARG_NONNULL(1);

/**
 * Retrieve the font family and size in use on a given text object.
 *
 * @param obj The evas text object to query for font information.
 * @param font A pointer to the location to store the font name in.
 * @param size A pointer to the location to store the font size in.
 *
 * This function allows the font name and size of a text object to be
 * queried. Be aware that the font name string is still owned by Evas
 * and should @b not have free() called on it by the caller of the
 * function.
 *
 * @see evas_object_text_font_set()
 */
EAPI void                 evas_object_text_font_get(const Evas_Object *obj, const char **font, Evas_Font_Size *size) EINA_ARG_NONNULL(1);

/**
 * Sets the text string to be displayed by the given text object.
 *
 * @param obj The text object to set text string on.
 * @param text Text string to display on it.
 *
 * @see evas_object_text_text_get()
 */
EAPI void                 evas_object_text_text_set(Evas_Object *obj, const char *text) EINA_ARG_NONNULL(1);

/**
 * Retrieves the text string currently being displayed by the given
 * text object.
 *
 * @param  obj The given text object.
 * @return The text string currently being displayed on it.
 *
 * @note Do not free() the return value.
 *
 * @see evas_object_text_text_set()
 */
EAPI const char          *evas_object_text_text_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * @brief Sets the BiDi delimiters used in the textblock.
 *
 * BiDi delimiters are use for in-paragraph separation of bidi segments. This
 * is useful for example in recipients fields of e-mail clients where bidi
 * oddities can occur when mixing RTL and LTR.
 *
 * @param obj The given text object.
 * @param delim A null terminated string of delimiters, e.g ",|".
 * @since 1.1
 */
EAPI void                 evas_object_text_bidi_delimiters_set(Evas_Object *obj, const char *delim);

/**
 * @brief Gets the BiDi delimiters used in the textblock.
 *
 * BiDi delimiters are use for in-paragraph separation of bidi segments. This
 * is useful for example in recipients fields of e-mail clients where bidi
 * oddities can occur when mixing RTL and LTR.
 *
 * @param obj The given text object.
 * @return A null terminated string of delimiters, e.g ",|". If empty, returns NULL.
 * @since 1.1
 */
EAPI const char          *evas_object_text_bidi_delimiters_get(const Evas_Object *obj);

/**
 * @brief Sets the ellipsis that should be used for the text object.
 *
 * This is a value between 0.0 and 1.0 indicating the position of the text
 * to be shown. 0.0 means the start will be shown and the end trimmed, 1.0
 * means the beginning will be trimmed and the end will be shown, and any value
 * in between will cause ellipsis to be added in both end of the text and the
 * requested part to be shown.
 * -1.0 means ellipsis is turned off.
 *
 * @param obj The given text object.
 * @param ellipsis the ellipsis.
 * @since 1.8
 */
EAPI void                 evas_object_text_ellipsis_set(Evas_Object *obj, double ellipsis);

/**
 * @brief Gets the ellipsis currently set on the text object.
 *
 * @param obj The given text object.
 * @return The ellipsis set on the text object.
 * @see evas_object_text_ellipsis_set.
 * @since 1.8
 */
EAPI double               evas_object_text_ellipsis_get(const Evas_Object *obj);

EAPI Evas_Coord           evas_object_text_ascent_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);
EAPI Evas_Coord           evas_object_text_descent_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);
EAPI Evas_Coord           evas_object_text_max_ascent_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);
EAPI Evas_Coord           evas_object_text_max_descent_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);
EAPI Evas_Coord           evas_object_text_horiz_advance_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);
EAPI Evas_Coord           evas_object_text_vert_advance_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);
EAPI Evas_Coord           evas_object_text_inset_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Retrieve position and dimension information of a character within a text @c Evas_Object.
 *
 * This function is used to obtain the X, Y, width and height of the character
 * located at @p pos within the @c Evas_Object @p obj. @p obj must be a text object
 * as created with evas_object_text_add(). Any of the @c Evas_Coord parameters (@p cx,
 * @p cy, @p cw, @p ch) may be @c NULL in which case no value will be assigned to that
 * parameter.
 *
 * @param obj	The text object to retrieve position information for.
 * @param pos	The character position to request co-ordinates for.
 * @param cx	A pointer to an @c Evas_Coord to store the X value in (can be NULL).
 * @param cy	A pointer to an @c Evas_Coord to store the Y value in (can be NULL).
 * @param cw	A pointer to an @c Evas_Coord to store the Width value in (can be NULL).
 * @param ch	A pointer to an @c Evas_Coord to store the Height value in (can be NULL).
 *
 * @return @c EINA_FALSE on success, @c EINA_TRUE on error.
 */
EAPI Eina_Bool            evas_object_text_char_pos_get(const Evas_Object *obj, int pos, Evas_Coord *cx, Evas_Coord *cy, Evas_Coord *cw, Evas_Coord *ch) EINA_ARG_NONNULL(1);
EAPI int                  evas_object_text_char_coords_get(const Evas_Object *obj, Evas_Coord x, Evas_Coord y, Evas_Coord *cx, Evas_Coord *cy, Evas_Coord *cw, Evas_Coord *ch) EINA_ARG_NONNULL(1);

/**
 * Returns the logical position of the last char in the text
 * up to the pos given. This is NOT the position of the last char
 * because of the possibility of RTL in the text.
 */
EAPI int                  evas_object_text_last_up_to_pos(const Evas_Object *obj, Evas_Coord x, Evas_Coord y) EINA_ARG_NONNULL(1);

/**
 * Retrieves the style on use on the given text object.
 *
 * @param obj the given text object to set style on.
 * @return the style type in use.
 *
 * @see evas_object_text_style_set() for more details.
 */
EAPI Evas_Text_Style_Type evas_object_text_style_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Sets the style to apply on the given text object.
 *
 * @param obj the given text object to set style on.
 * @param type a style type.
 *
 * Text object styles are one of the values in
 * #Evas_Text_Style_Type. Some of those values are combinations of
 * more than one style, and some account for the direction of the
 * rendering of shadow effects.
 *
 * @note One may use the helper macros #EVAS_TEXT_STYLE_BASIC_SET and
 * #EVAS_TEXT_STYLE_SHADOW_DIRECTION_SET to assemble a style value.
 *
 * The following figure illustrates the text styles:
 *
 * @image html text-styles.png
 * @image rtf text-styles.png
 * @image latex text-styles.eps
 *
 * @see evas_object_text_style_get()
 * @see evas_object_text_shadow_color_set()
 * @see evas_object_text_outline_color_set()
 * @see evas_object_text_glow_color_set()
 * @see evas_object_text_glow2_color_set()
 */
EAPI void                 evas_object_text_style_set(Evas_Object *obj, Evas_Text_Style_Type type) EINA_ARG_NONNULL(1);

/**
 * Sets the shadow color for the given text object.
 *
 * @param obj The given Evas text object.
 * @param r The red component of the given color.
 * @param g The green component of the given color.
 * @param b The blue component of the given color.
 * @param a The alpha component of the given color.
 *
 * Shadow effects, which are fading colors decorating the text
 * underneath it, will just be shown if the object is set to one of
 * the following styles:
 *
 * - #EVAS_TEXT_STYLE_SHADOW
 * - #EVAS_TEXT_STYLE_OUTLINE_SHADOW
 * - #EVAS_TEXT_STYLE_FAR_SHADOW
 * - #EVAS_TEXT_STYLE_OUTLINE_SOFT_SHADOW
 * - #EVAS_TEXT_STYLE_SOFT_SHADOW
 * - #EVAS_TEXT_STYLE_FAR_SOFT_SHADOW
 *
 * One can also change the direction where the shadow grows to, with
 * evas_object_text_style_set().
 *
 * @see evas_object_text_shadow_color_get()
 */
EAPI void                 evas_object_text_shadow_color_set(Evas_Object *obj, int r, int g, int b, int a) EINA_ARG_NONNULL(1);

/**
 * Retrieves the shadow color for the given text object.
 *
 * @param obj The given Evas text object.
 * @param r Pointer to variable to hold the red component of the given
 * color.
 * @param g Pointer to variable to hold the green component of the
 * given color.
 * @param b Pointer to variable to hold the blue component of the
 * given color.
 * @param a Pointer to variable to hold the alpha component of the
 * given color.
 *
 * @note Use @c NULL pointers on the color components you're not
 * interested in: they'll be ignored by the function.
 *
 * @see evas_object_text_shadow_color_set() for more details.
 */
EAPI void                 evas_object_text_shadow_color_get(const Evas_Object *obj, int *r, int *g, int *b, int *a) EINA_ARG_NONNULL(1);

/**
 * Sets the glow color for the given text object.
 *
 * @param obj The given Evas text object.
 * @param r The red component of the given color.
 * @param g The green component of the given color.
 * @param b The blue component of the given color.
 * @param a The alpha component of the given color.
 *
 * Glow effects, which are glowing colors decorating the text's
 * surroundings, will just be shown if the object is set to the
 * #EVAS_TEXT_STYLE_GLOW style.
 *
 * @note Glow effects are placed from a short distance of the text
 * itself, but no touching it. For glowing effects right on the
 * borders of the glyphs, see 'glow 2' effects
 * (evas_object_text_glow2_color_set()).
 *
 * @see evas_object_text_glow_color_get()
 */
EAPI void                 evas_object_text_glow_color_set(Evas_Object *obj, int r, int g, int b, int a) EINA_ARG_NONNULL(1);

/**
 * Retrieves the glow color for the given text object.
 *
 * @param obj The given Evas text object.
 * @param r Pointer to variable to hold the red component of the given
 * color.
 * @param g Pointer to variable to hold the green component of the
 * given color.
 * @param b Pointer to variable to hold the blue component of the
 * given color.
 * @param a Pointer to variable to hold the alpha component of the
 * given color.
 *
 * @note Use @c NULL pointers on the color components you're not
 * interested in: they'll be ignored by the function.
 *
 * @see evas_object_text_glow_color_set() for more details.
 */
EAPI void                 evas_object_text_glow_color_get(const Evas_Object *obj, int *r, int *g, int *b, int *a) EINA_ARG_NONNULL(1);

/**
 * Sets the 'glow 2' color for the given text object.
 *
 * @param obj The given Evas text object.
 * @param r The red component of the given color.
 * @param g The green component of the given color.
 * @param b The blue component of the given color.
 * @param a The alpha component of the given color.
 *
 * 'Glow 2' effects, which are glowing colors decorating the text's
 * (immediate) surroundings, will just be shown if the object is set
 * to the #EVAS_TEXT_STYLE_GLOW style. See also
 * evas_object_text_glow_color_set().
 *
 * @see evas_object_text_glow2_color_get()
 */
EAPI void                 evas_object_text_glow2_color_set(Evas_Object *obj, int r, int g, int b, int a) EINA_ARG_NONNULL(1);

/**
 * Retrieves the 'glow 2' color for the given text object.
 *
 * @param obj The given Evas text object.
 * @param r Pointer to variable to hold the red component of the given
 * color.
 * @param g Pointer to variable to hold the green component of the
 * given color.
 * @param b Pointer to variable to hold the blue component of the
 * given color.
 * @param a Pointer to variable to hold the alpha component of the
 * given color.
 *
 * @note Use @c NULL pointers on the color components you're not
 * interested in: they'll be ignored by the function.
 *
 * @see evas_object_text_glow2_color_set() for more details.
 */
EAPI void                 evas_object_text_glow2_color_get(const Evas_Object *obj, int *r, int *g, int *b, int *a) EINA_ARG_NONNULL(1);

/**
 * Sets the outline color for the given text object.
 *
 * @param obj The given Evas text object.
 * @param r The red component of the given color.
 * @param g The green component of the given color.
 * @param b The blue component of the given color.
 * @param a The alpha component of the given color.
 *
 * Outline effects (colored lines around text glyphs) will just be
 * shown if the object is set to one of the following styles:
 * - #EVAS_TEXT_STYLE_OUTLINE
 * - #EVAS_TEXT_STYLE_SOFT_OUTLINE
 * - #EVAS_TEXT_STYLE_OUTLINE_SHADOW
 * - #EVAS_TEXT_STYLE_OUTLINE_SOFT_SHADOW
 *
 * @see evas_object_text_outline_color_get()
 */
EAPI void                 evas_object_text_outline_color_set(Evas_Object *obj, int r, int g, int b, int a) EINA_ARG_NONNULL(1);

/**
 * Retrieves the outline color for the given text object.
 *
 * @param obj The given Evas text object.
 * @param r Pointer to variable to hold the red component of the given
 * color.
 * @param g Pointer to variable to hold the green component of the
 * given color.
 * @param b Pointer to variable to hold the blue component of the
 * given color.
 * @param a Pointer to variable to hold the alpha component of the
 * given color.
 *
 * @note Use @c NULL pointers on the color components you're not
 * interested in: they'll be ignored by the function.
 *
 * @see evas_object_text_outline_color_set() for more details.
 */
EAPI void                 evas_object_text_outline_color_get(const Evas_Object *obj, int *r, int *g, int *b, int *a) EINA_ARG_NONNULL(1);

/**
 * Gets the text style pad of a text object.
 *
 * @param obj The given text object.
 * @param l The left pad (or @c NULL).
 * @param r The right pad (or @c NULL).
 * @param t The top pad (or @c NULL).
 * @param b The bottom pad (or @c NULL).
 *
 */
EAPI void                 evas_object_text_style_pad_get(const Evas_Object *obj, int *l, int *r, int *t, int *b) EINA_ARG_NONNULL(1);

/**
 * Retrieves the direction of the text currently being displayed in the
 * text object.
 * @param  obj The given evas text object.
 * @return the direction of the text
 */
EAPI Evas_BiDi_Direction  evas_object_text_direction_get(const Evas_Object *obj) EINA_ARG_NONNULL(1) EINA_WARN_UNUSED_RESULT;
/**
 * @}
 */

/**
 * @ingroup Evas_Object_Textblock
 *
 * @{
 */

/**
 * Adds a textblock to the given evas.
 * @param   e The given evas.
 * @return  The new textblock object.
 */
EAPI Evas_Object                             *evas_object_textblock_add(Evas *e) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1) EINA_MALLOC;

/**
 * Return the plain version of the markup.
 *
 * Works as if you set the markup to a textblock and then retrieve the plain
 * version of the text. i.e: <br> and <\n> will be replaced with \n, &...; with
 * the actual char and etc.
 *
 * @param obj The textblock object to work with. (if @c NULL, tries the
 * default).
 * @param text The markup text (if @c NULL, return @c NULL).
 * @return An allocated plain text version of the markup.
 * @since 1.2
 */
EAPI char                                    *evas_textblock_text_markup_to_utf8(const Evas_Object *obj, const char *text) EINA_WARN_UNUSED_RESULT EINA_MALLOC;

/**
 * Return the markup version of the plain text.
 *
 * Replaces \\n -\> \<br/\> \\t -\> \<tab/\> and etc. Generally needed before you pass
 * plain text to be set in a textblock.
 *
 * @param obj the textblock object to work with (if @c NULL, it just does the
 * default behaviour, i.e with no extra object information).
 * @param text The markup text (if @c NULL, return @c NULL).
 * @return An allocated plain text version of the markup.
 * @since 1.2
 */
EAPI char                                    *evas_textblock_text_utf8_to_markup(const Evas_Object *obj, const char *text) EINA_WARN_UNUSED_RESULT EINA_MALLOC;

/**
 * Set the objects style to ts.
 * @param obj the Evas object to set the style to.
 * @param ts  the style to set.
 * @return Returns no value.
 */
EAPI void                                     evas_object_textblock_style_set(Evas_Object *obj, const Evas_Textblock_Style *ts) EINA_ARG_NONNULL(1);

/**
 * Return the style of an object.
 * @param obj  the object to get the style from.
 * @return the style of the object.
 */
EAPI const Evas_Textblock_Style              *evas_object_textblock_style_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Push ts to the top of the user style stack.
 *
 * FIXME: API is solid but currently only supports 1 style in the stack.
 *
 * The user style overrides the corresponding elements of the regular style.
 * This is the proper way to do theme overrides in code.
 * @param obj the Evas object to set the style to.
 * @param ts  the style to set.
 * @return Returns no value.
 * @see evas_object_textblock_style_set
 * @since 1.2
 */
EAPI void                                     evas_object_textblock_style_user_push(Evas_Object *obj, Evas_Textblock_Style *ts) EINA_ARG_NONNULL(1);

/**
 * Del the from the top of the user style stack.
 *
 * @param obj  the object to get the style from.
 * @see evas_object_textblock_style_get
 * @since 1.2
 */
EAPI void                                     evas_object_textblock_style_user_pop(Evas_Object *obj) EINA_ARG_NONNULL(1);

/**
 * Get (don't remove) the style at the top of the user style stack.
 *
 * @param obj  the object to get the style from.
 * @return the style of the object.
 * @see evas_object_textblock_style_get
 * @since 1.2
 */
EAPI const Evas_Textblock_Style              *evas_object_textblock_style_user_peek(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * @brief Set the "replacement character" to use for the given textblock object.
 *
 * @param obj The given textblock object.
 * @param ch The charset name.
 */
EAPI void                                     evas_object_textblock_replace_char_set(Evas_Object *obj, const char *ch) EINA_ARG_NONNULL(1);

/**
 * @brief Get the "replacement character" for given textblock object. Returns
 * @c NULL if no replacement character is in use.
 *
 * @param obj The given textblock object
 * @return Replacement character or @c NULL.
 */
EAPI const char                              *evas_object_textblock_replace_char_get(Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * @brief Sets the vertical alignment of text within the textblock object
 * as a whole.
 *
 * Normally alignment is 0.0 (top of object). Values given should be
 * between 0.0 and 1.0 (1.0 bottom of object, 0.5 being vertically centered
 * etc.).
 *
 * @param obj The given textblock object.
 * @param align A value between @c 0.0 and @c 1.0.
 * @since 1.1
 */
EAPI void                                     evas_object_textblock_valign_set(Evas_Object *obj, double align);

/**
 * @brief Gets the vertical alignment of a textblock
 *
 * @param obj The given textblock object.
 * @return The alignment set for the object.
 * @since 1.1
 */
EAPI double                                   evas_object_textblock_valign_get(const Evas_Object *obj);

/**
 * @brief Sets the BiDi delimiters used in the textblock.
 *
 * BiDi delimiters are use for in-paragraph separation of bidi segments. This
 * is useful for example in recipients fields of e-mail clients where bidi
 * oddities can occur when mixing RTL and LTR.
 *
 * @param obj The given textblock object.
 * @param delim A null terminated string of delimiters, e.g ",|".
 * @since 1.1
 */
EAPI void                                     evas_object_textblock_bidi_delimiters_set(Evas_Object *obj, const char *delim);

/**
 * @brief Gets the BiDi delimiters used in the textblock.
 *
 * BiDi delimiters are use for in-paragraph separation of bidi segments. This
 * is useful for example in recipients fields of e-mail clients where bidi
 * oddities can occur when mixing RTL and LTR.
 *
 * @param obj The given textblock object.
 * @return A null terminated string of delimiters, e.g ",|". If empty, returns
 * @c NULL.
 * @since 1.1
 */
EAPI const char                              *evas_object_textblock_bidi_delimiters_get(const Evas_Object *obj);

/**
 * @brief Sets newline mode. When true, newline character will behave
 * as a paragraph separator.
 *
 * @param obj The given textblock object.
 * @param mode @c EINA_TRUE for legacy mode, @c EINA_FALSE otherwise.
 * @since 1.1
 */
EAPI void                                     evas_object_textblock_legacy_newline_set(Evas_Object *obj, Eina_Bool mode) EINA_ARG_NONNULL(1);

/**
 * @brief Gets newline mode. When true, newline character behaves
 * as a paragraph separator.
 *
 * @param obj The given textblock object.
 * @return @c EINA_TRUE if in legacy mode, @c EINA_FALSE otherwise.
 * @since 1.1
 */
EAPI Eina_Bool                                evas_object_textblock_legacy_newline_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Sets the tetxblock's text to the markup text.
 *
 * @note assumes text does not include the unicode object replacement char (0xFFFC)
 *
 * @param obj  the textblock object.
 * @param text the markup text to use.
 * @return Return no value.
 */
EAPI void                                     evas_object_textblock_text_markup_set(Evas_Object *obj, const char *text) EINA_ARG_NONNULL(1);

/**
 * Return the markup of the object.
 *
 * @param obj the Evas object.
 * @return the markup text of the object.
 */
EAPI const char                              *evas_object_textblock_text_markup_get(const Evas_Object *obj) EINA_ARG_NONNULL(1);

/**
 * Return the object's main cursor.
 *
 * @param obj the object.
 * @return The @p obj's main cursor.
 */
EAPI Evas_Textblock_Cursor                   *evas_object_textblock_cursor_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Create a new cursor, associate it to the obj and init it to point
 * to the start of the textblock. Association to the object means the cursor
 * will be updated when the object will change.
 *
 * @note if you need speed and you know what you are doing, it's slightly faster to just allocate the cursor yourself and not associate it. (only people developing the actual object, and not users of the object).
 *
 * @param obj the object to associate to.
 * @return the new cursor.
 */
EAPI Evas_Textblock_Cursor                   *evas_object_textblock_cursor_new(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1) EINA_MALLOC;

/**
 * Returns the
 *
 * @param obj The evas, must not be @c NULL.
 * @param anchor the anchor name to get
 * @return Returns the list format node corresponding to the anchor, may be null if there are none.
 */
EAPI const Eina_List                         *evas_textblock_node_format_list_get(const Evas_Object *obj, const char *anchor) EINA_ARG_NONNULL(1, 2);

/**
 * Returns the first format node.
 *
 * @param obj The evas, must not be @c NULL.
 * @return Returns the first format node, may be null if there are none.
 */
EAPI const Evas_Object_Textblock_Node_Format *evas_textblock_node_format_first_get(const Evas_Object *obj) EINA_ARG_NONNULL(1);

/**
 * Returns the last format node.
 *
 * @param obj The evas textblock, must not be NULL.
 * @return Returns the first format node, may be null if there are none.
 */
EAPI const Evas_Object_Textblock_Node_Format *evas_textblock_node_format_last_get(const Evas_Object *obj) EINA_ARG_NONNULL(1);

/**
 * Remove a format node and it's match. i.e, removes a \<tag\> \</tag\> pair.
 * Assumes the node is the first part of \<tag\> i.e, this won't work if
 * n is a closing tag.
 *
 * @param obj the Evas object of the textblock - not null.
 * @param n the current format node - not null.
 */
EAPI void                                     evas_textblock_node_format_remove_pair(Evas_Object *obj, Evas_Object_Textblock_Node_Format *n) EINA_ARG_NONNULL(1, 2);

/**
 * Get the geometry of a line number.
 *
 * @param obj the object.
 * @param line the line number.
 * @param cx x coord of the line.
 * @param cy y coord of the line.
 * @param cw w coord of the line.
 * @param ch h coord of the line.
 * @return @c EINA_TRUE on success, @c EINA_FALSE otherwise.
 */
EAPI Eina_Bool                                evas_object_textblock_line_number_geometry_get(const Evas_Object *obj, int line, Evas_Coord *cx, Evas_Coord *cy, Evas_Coord *cw, Evas_Coord *ch) EINA_ARG_NONNULL(1);

/**
 * Clear the textblock object.
 * @note Does *NOT* free the Evas object itself.
 *
 * @param obj the object to clear.
 * @return nothing.
 */
EAPI void                                     evas_object_textblock_clear(Evas_Object *obj) EINA_ARG_NONNULL(1);

/**
 * Get the formatted width and height. This calculates the actual size after restricting
 * the textblock to the current size of the object.
 * The main difference between this and @ref evas_object_textblock_size_native_get
 * is that the "native" function does not wrapping into account
 * it just calculates the real width of the object if it was placed on an
 * infinite canvas, while this function gives the size after wrapping
 * according to the size restrictions of the object.
 *
 * For example for a textblock containing the text: "You shall not pass!"
 * with no margins or padding and assuming a monospace font and a size of
 * 7x10 char widths (for simplicity) has a native size of 19x1
 * and a formatted size of 5x4.
 *
 *
 * @param obj the Evas object.
 * @param w the width of the object.
 * @param h the height of the object
 * @return Returns no value.
 * @see evas_object_textblock_size_native_get
 */
EAPI void                                     evas_object_textblock_size_formatted_get(const Evas_Object *obj, Evas_Coord *w, Evas_Coord *h) EINA_ARG_NONNULL(1);

/**
 * Get the native width and height. This calculates the actual size without taking account
 * the current size of the object.
 * The main difference between this and @ref evas_object_textblock_size_formatted_get
 * is that the "native" function does not take wrapping into account
 * it just calculates the real width of the object if it was placed on an
 * infinite canvas, while the "formatted" function gives the size after
 * wrapping text according to the size restrictions of the object.
 *
 * For example for a textblock containing the text: "You shall not pass!"
 * with no margins or padding and assuming a monospace font and a size of
 * 7x10 char widths (for simplicity) has a native size of 19x1
 * and a formatted size of 5x4.
 *
 * @param obj the Evas object of the textblock
 * @param w the width returned
 * @param h the height returned
 * @return Returns no value.
 */
EAPI void                                     evas_object_textblock_size_native_get(const Evas_Object *obj, Evas_Coord *w, Evas_Coord *h) EINA_ARG_NONNULL(1);
EAPI void                                     evas_object_textblock_style_insets_get(const Evas_Object *obj, Evas_Coord *l, Evas_Coord *r, Evas_Coord *t, Evas_Coord *b) EINA_ARG_NONNULL(1);
/**
 * @}
 */

/**
 * @ingroup Evas_Object_Grid
 *
 * @{
 */
/**
 * @brief Add a textgrid to the given Evas.
 *
 * @param e The given evas.
 * @return The new textgrid object.
 *
 * This function adds a new textgrid object to the Evas @p e and returns the object.
 *
 * @since 1.7
 */
EAPI Evas_Object *evas_object_textgrid_add(Evas *e);

/**
 * @brief Set the size of the textgrid object.
 *
 * @param obj The textgrid object.
 * @param w The number of columns (width in cells) of the grid.
 * @param h The number of rows (height in cells) of the grid.
 *
 * This function sets the number of lines @p h and the number
 * of columns @p w to the textgrid object @p obj. If
 * @p w or @p h are less or equal than 0, this
 * functiond does nothing.
 *
 * @since 1.7
 */
EAPI void evas_object_textgrid_size_set(Evas_Object *obj, int w, int h);

/**
 * @brief Get the size of the textgrid object.
 *
 * @param obj The textgrid object.
 * @param w The number of columns of the grid.
 * @param h The number of rows of the grid.
 *
 * This function retrieves the number of lines in the buffer @p
 * h and the number of columns in the buffer @p w of
 * the textgrid object @p obj. @p w or @p h can be
 * @c NULL. On error, their value is 0.
 *
 * @since 1.7
 */
EAPI void evas_object_textgrid_size_get(const Evas_Object *obj, int *w, int *h);

/**
 * @brief Set the font (source) file to be used on a given textgrid object.
 *
 * @param obj The textgrid object to set font for.
 * @param font_source The font file's path.
 *
 * This function allows the font file @p font_source to be explicitly
 * set for the textgrid object @p obj, overriding system lookup, which
 * will first occur in the given file's contents. If @p font_source is
 * @c NULL or is an empty string, or the same font_source has already
 * been set, or on error, this function does nothing.
 *
 * @see evas_object_textgrid_font_get()
 * @see evas_object_textgrid_font_set()
 * @see evas_object_textgrid_font_source_get()
 *
 * @since 1.7
 */
EAPI void evas_object_textgrid_font_source_set(Evas_Object *obj, const char *font_source);

/**
 * @brief Get the font file's path which is being used on a given textgrid object.
 *
 * @param obj The textgrid object to set font for.
 * @return The font file's path.
 *
 * This function returns the font source path of the textgrid object
 * @p obj. If the font source path has not been set, or on error,
 * @c NULL is returned.
 *
 * @see evas_object_textgrid_font_get()
 * @see evas_object_textgrid_font_set()
 * @see evas_object_textgrid_font_source_set()
 *
 * @since 1.7
 */
EAPI const char *evas_object_textgrid_font_source_get(const Evas_Object *obj);

/**
 * @brief Set the font family and size on a given textgrid object.
 *
 * @param obj The textgrid object to set font for.
 * @param font_name The font (family) name.
 * @param font_size The font size, in points.
 *
 * This function allows the font name @p font_name and size
 * @p font_size of the textgrid object @p obj to be set. The @p font_name
 * string has to follow fontconfig's convention on naming fonts, as
 * it's the underlying library used to query system fonts by Evas (see
 * the @c fc-list command's output, on your system, to get an
 * idea). It also has to be a monospace font. If @p font_name is
 * @c NULL, or if it is an empty string, or if @p font_size is less or
 * equal than 0, or on error, this function does nothing.
 *
 * @see evas_object_textgrid_font_get()
 * @see evas_object_textgrid_font_source_set()
 * @see evas_object_textgrid_font_source_get()
 *
 * @since 1.7
 */
EAPI void evas_object_textgrid_font_set(Evas_Object *obj, const char *font_name, Evas_Font_Size font_size);

/**
 * @brief Retrieve the font family and size in use on a given textgrid object.
 *
 * @param obj The textgrid object to query for font information.
 * @param font_name A pointer to the location to store the font name in.
 * @param font_size A pointer to the location to store the font size in.
 *
 * This function allows the font name and size of a textgrid object
 * @p obj to be queried and stored respectively in the buffers
 * @p font_name and @p font_size. Be aware that the font name string is
 * still owned by Evas and should @b not have free() called on it by
 * the caller of the function. On error, the font name is the empty
 * string and the font size is 0. @p font_name and @p font_source can
 * be @c NULL.
 *
 * @see evas_object_textgrid_font_set()
 * @see evas_object_textgrid_font_source_set()
 * @see evas_object_textgrid_font_source_get()
 *
 * @since 1.7
 */
EAPI void evas_object_textgrid_font_get(const Evas_Object *obj, const char **font_name, Evas_Font_Size *font_size);

/**
 * @brief Retrieve the size of a cell of the given textgrid object in pixels.
 *
 * @param obj The textgrid object to query for font information.
 * @param w A pointer to the location to store the width in pixels of a cell.
 * @param h A pointer to the location to store the height in
 * pixels of a cell.
 *
 * This functions retrieves the width and height, in pixels, of a cell
 * of the textgrid object @p obj and store them respectively in the
 * buffers @p width and @p height. Their value depends on the
 * monospace font used for the textgrid object, as well as the
 * style. @p width and @p height can be @c NULL. On error, they are
 * set to 0.
 *
 * @see evas_object_textgrid_font_set()
 * @see evas_object_textgrid_supported_font_styles_set()
 *
 * @since 1.7
 */
EAPI void evas_object_textgrid_cell_size_get(const Evas_Object *obj, Evas_Coord *w, Evas_Coord *h);

/**
 * @brief The set color to the given palette at the given index of the given textgrid object.
 *
 * @param obj The textgrid object to query for font information.
 * @param pal The type of the palette to set the color.
 * @param idx The index of the paletter to which the color is stored.
 * @param r The red component of the color.
 * @param g The green component of the color.
 * @param b The blue component of the color.
 * @param a The alpha component of the color.
 *
 * This function sets the color for the palette of type @p pal at the
 * index @p idx of the textgrid object @p obj. The ARGB components are
 * given by @p r, @p g, @p b and @p a. This color can be used when
 * setting the #Evas_Textgrid_Cell structure. The components must set
 * a pre-multiplied color. If pal is #EVAS_TEXTGRID_PALETTE_NONE or
 * #EVAS_TEXTGRID_PALETTE_LAST, or if @p idx is not between 0 and 255,
 * or on error, this function does nothing. The color components are
 * clamped between 0 and 255. If @p idx is greater than the latest set
 * color, the colors between this last index and @p idx - 1 are set to
 * black (0, 0, 0, 0).
 *
 * @see evas_object_textgrid_palette_get()
 *
 * @since 1.7
 */
EAPI void evas_object_textgrid_palette_set(Evas_Object *obj, Evas_Textgrid_Palette pal, int idx, int r, int g, int b, int a);

/**
 * @brief The retrieve color to the given palette at the given index of the given textgrid object.
 *
 * @param obj The textgrid object to query for font information.
 * @param pal The type of the palette to set the color.
 * @param idx The index of the palette to which the color is stored.
 * @param r A pointer to the red component of the color.
 * @param g A pointer to the green component of the color.
 * @param b A pointer to the blue component of the color.
 * @param a A pointer to the alpha component of the color.
 *
 * This function retrieves the color for the palette of type @p pal at the
 * index @p idx of the textgrid object @p obj. The ARGB components are
 * stored in the buffers @p r, @p g, @p b and @p a. If @p idx is not
 * between 0 and the index of the latest set color, or if @p pal is
 * #EVAS_TEXTGRID_PALETTE_NONE or #EVAS_TEXTGRID_PALETTE_LAST, the
 * values of the components are 0. @p r, @p g, @p b and @p a can be
 * @c NULL.
 *
 * @see evas_object_textgrid_palette_set()
 *
 * @since 1.7
 */
EAPI void evas_object_textgrid_palette_get(const Evas_Object *obj, Evas_Textgrid_Palette pal, int idx, int *r, int *g, int *b, int *a);

EAPI void evas_object_textgrid_supported_font_styles_set(Evas_Object *obj, Evas_Textgrid_Font_Style styles);
EAPI Evas_Textgrid_Font_Style evas_object_textgrid_supported_font_styles_get(const Evas_Object *obj);

/**
 * @brief Set the string at the given row of the given textgrid object.
 *
 * @param obj The textgrid object to query for font information.
 * @param y The row index of the grid.
 * @param row The string as a sequence of #Evas_Textgrid_Cell.
 *
 * This function returns cells to the textgrid taken by
 * evas_object_textgrid_cellrow_get(). The row pointer @p row should be the
 * same row pointer returned by evas_object_textgrid_cellrow_get() for the
 * same row @p y.
 *
 * @see evas_object_textgrid_cellrow_get()
 * @see evas_object_textgrid_size_set()
 * @see evas_object_textgrid_update_add()
 *
 * @since 1.7
 */
EAPI void evas_object_textgrid_cellrow_set(Evas_Object *obj, int y, const Evas_Textgrid_Cell *row);

/**
 * @brief Get the string at the given row of the given textgrid object.
 *
 * @param obj The textgrid object to query for font information.
 * @param y The row index of the grid.
 * @return A pointer to the first cell of the given row.
 *
 * This function returns a pointer to the first cell of the line @p y
 * of the textgrid object @p obj. If @p y is not between 0 and the
 * number of lines of the grid - 1, or on error, this function return @c NULL.
 *
 * @see evas_object_textgrid_cellrow_set()
 * @see evas_object_textgrid_size_set()
 * @see evas_object_textgrid_update_add()
 *
 * @since 1.7
 */
EAPI Evas_Textgrid_Cell *evas_object_textgrid_cellrow_get(const Evas_Object *obj, int y);

/**
 * @brief Indicate for evas that part of a textgrid region (cells) has been updated.
 *
 * @param obj The textgrid object.
 * @param x The rect region of cells top-left x (column)
 * @param y The rect region of cells top-left y (row)
 * @param w The rect region size in number of cells (columns)
 * @param h The rect region size in number of cells (rows)
 *
 * This function declares to evas that a region of cells was updated by
 * code and needs refreshing. An application should modify cells like this
 * as an example:
 * 
 * @code
 * Evas_Textgrid_Cell *cells;
 * int i;
 * 
 * cells = evas_object_textgrid_cellrow_get(obj, row);
 * for (i = 0; i < width; i++) cells[i].codepoint = 'E';
 * evas_object_textgrid_cellrow_set(obj, row, cells);
 * evas_object_textgrid_update_add(obj, 0, row, width, 1);
 * @endcode
 *
 * @see evas_object_textgrid_cellrow_set()
 * @see evas_object_textgrid_cellrow_get()
 * @see evas_object_textgrid_size_set()
 *
 * @since 1.7
 */
EAPI void evas_object_textgrid_update_add(Evas_Object *obj, int x, int y, int w, int h);

/**
 * @}
 */

/**
 * @ingroup Evas_Object_Line
 *
 * @{
 */
/**
 * Adds a new evas line object to the given evas.
 * @param   e The given evas.
 * @return  The new evas line object.
 */
EAPI Evas_Object *evas_object_line_add(Evas *e) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1) EINA_MALLOC;

/**
 * Sets the coordinates of the end points of the given evas line object.
 * @param   obj The given evas line object.
 * @param   x1  The X coordinate of the first point.
 * @param   y1  The Y coordinate of the first point.
 * @param   x2  The X coordinate of the second point.
 * @param   y2  The Y coordinate of the second point.
 */
EAPI void         evas_object_line_xy_set(Evas_Object *obj, Evas_Coord x1, Evas_Coord y1, Evas_Coord x2, Evas_Coord y2);

/**
 * Retrieves the coordinates of the end points of the given evas line object.
 * @param obj The given line object.
 * @param x1  Pointer to an integer in which to store the X coordinate of the
 *            first end point.
 * @param y1  Pointer to an integer in which to store the Y coordinate of the
 *            first end point.
 * @param x2  Pointer to an integer in which to store the X coordinate of the
 *            second end point.
 * @param y2  Pointer to an integer in which to store the Y coordinate of the
 *            second end point.
 */
EAPI void         evas_object_line_xy_get(const Evas_Object *obj, Evas_Coord *x1, Evas_Coord *y1, Evas_Coord *x2, Evas_Coord *y2);
/**
 * @}
 */

/**
 * @ingroup Evas_Object_Polygon
 *
 * @{
 */
/**
 * Adds a new evas polygon object to the given evas.
 * @param   e The given evas.
 * @return  A new evas polygon object.
 */
EAPI Evas_Object *evas_object_polygon_add(Evas *e) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1) EINA_MALLOC;

/**
 * Adds the given point to the given evas polygon object.
 * @param obj The given evas polygon object.
 * @param x   The X coordinate of the given point.
 * @param y   The Y coordinate of the given point.
 * @ingroup Evas_Polygon_Group
 */
EAPI void         evas_object_polygon_point_add(Evas_Object *obj, Evas_Coord x, Evas_Coord y) EINA_ARG_NONNULL(1);

/**
 * Removes all of the points from the given evas polygon object.
 * @param   obj The given polygon object.
 */
EAPI void         evas_object_polygon_points_clear(Evas_Object *obj) EINA_ARG_NONNULL(1);
/**
 * @}
 */

/* @since 1.2 */
EAPI void         evas_object_is_frame_object_set(Evas_Object *obj, Eina_Bool is_frame);

/* @since 1.2 */
EAPI Eina_Bool    evas_object_is_frame_object_get(Evas_Object *obj);

/**
 * @}
 */

/**
 * @ingroup Evas_Group_Smart
 *
 * @{
 */

/**
 * @}
 */

/**
 * @ingroup Evas_Smart_Object_Group
 *
 * @{
 */
/**
 * Instantiates a new smart object described by @p s.
 *
 * @param e the canvas on which to add the object
 * @param s the #Evas_Smart describing the smart object
 * @return a new #Evas_Object handle
 *
 * This is the function one should use when defining the public
 * function @b adding an instance of the new smart object to a given
 * canvas. It will take care of setting all of its internals to work
 * as they should, if the user set things properly, as seem on the
 * #EVAS_SMART_SUBCLASS_NEW, for example.
 *
 * @ingroup Evas_Smart_Object_Group
 */
EAPI Evas_Object *evas_object_smart_add(Evas *e, Evas_Smart *s) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1, 2) EINA_MALLOC;

/**
 * Set an Evas object as a member of a given smart object.
 *
 * @param obj The member object
 * @param smart_obj The smart object
 *
 * Members will automatically be stacked and layered together with the
 * smart object. The various stacking functions will operate on
 * members relative to the other members instead of the entire canvas,
 * since they now live on an exclusive layer (see
 * evas_object_stack_above(), for more details).
 *
 * Any @p smart_obj object's specific implementation of the @c
 * member_add() smart function will take place too, naturally.
 *
 * @see evas_object_smart_member_del()
 * @see evas_object_smart_members_get()
 *
 * @ingroup Evas_Smart_Object_Group
 */
EAPI void         evas_object_smart_member_add(Evas_Object *obj, Evas_Object *smart_obj) EINA_ARG_NONNULL(1, 2);

/**
 * Removes a member object from a given smart object.
 *
 * @param obj the member object
 * @ingroup Evas_Smart_Object_Group
 *
 * This removes a member object from a smart object, if it was added
 * to any. The object will still be on the canvas, but no longer
 * associated with whichever smart object it was associated with.
 *
 * @see evas_object_smart_member_add() for more details
 * @see evas_object_smart_members_get()
 */
EAPI void         evas_object_smart_member_del(Evas_Object *obj) EINA_ARG_NONNULL(1);

/**
 * Retrieves the list of the member objects of a given Evas smart
 * object
 *
 * @param obj the smart object to get members from
 * @return Returns the list of the member objects of @p obj.
 *
 * The returned list should be freed with @c eina_list_free() when you
 * no longer need it.
 *
 * @since 1.7 This function will return @c NULL when a non-smart object is passed.
 *
 * @see evas_object_smart_member_add()
 * @see evas_object_smart_member_del()
 * @see evas_object_smart_iterator_new()
 */
EAPI Eina_List   *evas_object_smart_members_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Retrieves an iterator of the member objects of a given Evas smart
 * object
 *
 * @param obj the smart object to get members from
 * @return Returns the iterator of the member objects of @p obj.
 *
 * @since 1.8
 *
 * @see evas_object_smart_member_add()
 * @see evas_object_smart_member_del()
 * @see evas_object_smart_members_get()
 */
EAPI Eina_Iterator   *evas_object_smart_iterator_new(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Gets the parent smart object of a given Evas object, if it has one.
 *
 * @param obj the Evas object you want to get the parent smart object
 * from
 * @return Returns the parent smart object of @a obj or @c NULL, if @a
 * obj is not a smart member of any
 *
 * @ingroup Evas_Smart_Object_Group
 */
EAPI Evas_Object *evas_object_smart_parent_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Checks whether a given smart object or any of its smart object
 * parents is of a given smart class.
 *
 * @param obj An Evas smart object to check the type of
 * @param type The @b name (type) of the smart class to check for
 * @return @c EINA_TRUE, if @a obj or any of its parents is of type @a
 * type, @c EINA_FALSE otherwise
 *
 * If @p obj is not a smart object, this call will fail
 * immediately.
 *
 * This function supports Eo and legacy inheritance mechanisms. However,
 * it is recommended to use eo_isa instead if your object is using Eo from
 * top to bottom.
 *
 * The checks use smart classes names and <b>string
 * comparison</b>. There is a version of this same check using
 * <b>pointer comparison</b>, since a smart class' name is a single
 * string in Evas.
 *
 * @see evas_object_smart_type_check_ptr()
 * @see eo_isa
 *
 * @ingroup Evas_Smart_Object_Group
 */
EAPI Eina_Bool    evas_object_smart_type_check(const Evas_Object *obj, const char *type) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1, 2);

/**
 * Checks whether a given smart object or any of its smart object
 * parents is of a given smart class, <b>using pointer comparison</b>.
 *
 * @param obj An Evas smart object to check the type of
 * @param type The type (name string) to check for. Must be the name
 * @return @c EINA_TRUE, if @a obj or any of its parents is of type @a
 * type, @c EINA_FALSE otherwise
 *
 * @see evas_object_smart_type_check() for more details
 * @see eo_isa
 *
 * @ingroup Evas_Smart_Object_Group
 */
EAPI Eina_Bool    evas_object_smart_type_check_ptr(const Evas_Object *obj, const char *type) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1, 2);

/**
 * Get the #Evas_Smart from which @p obj smart object was created.
 *
 * @param obj a smart object
 * @return the #Evas_Smart handle or @c NULL, on errors
 *
 * @ingroup Evas_Smart_Object_Group
 */
EAPI Evas_Smart  *evas_object_smart_smart_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Retrieve user data stored on a given smart object.
 *
 * @param obj The smart object's handle
 * @return A pointer to data stored using
 *         evas_object_smart_data_set(), or @c NULL, if none has been
 *         set.
 *
 * @see evas_object_smart_data_set()
 *
 * @ingroup Evas_Smart_Object_Group
 */
EAPI void        *evas_object_smart_data_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Store a pointer to user data for a given smart object.
 *
 * @param obj The smart object's handle
 * @param data A pointer to user data
 *
 * This data is stored @b independently of the one set by
 * evas_object_data_set(), naturally.
 *
 * @see evas_object_smart_data_get()
 *
 * @ingroup Evas_Smart_Object_Group
 */
EAPI void         evas_object_smart_data_set(Evas_Object *obj, void *data) EINA_ARG_NONNULL(1);

/**
 * Add (register) a callback function to the smart event specified by
 * @p event on the smart object @p obj.
 *
 * @param obj a smart object
 * @param event the event's name string
 * @param func the callback function
 * @param data user data to be passed to the callback function
 *
 * Smart callbacks look very similar to Evas callbacks, but are
 * implemented as smart object's custom ones.
 *
 * This function adds a function callback to an smart object when the
 * event named @p event occurs in it. The function is @p func.
 *
 * In the event of a memory allocation error during addition of the
 * callback to the object, evas_alloc_error() should be used to
 * determine the nature of the error, if any, and the program should
 * sensibly try and recover.
 *
 * A smart callback function must have the ::Evas_Smart_Cb prototype
 * definition. The first parameter (@p data) in this definition will
 * have the same value passed to evas_object_smart_callback_add() as
 * the @p data parameter, at runtime. The second parameter @p obj is a
 * handle to the object on which the event occurred. The third
 * parameter, @p event_info, is a pointer to data which is totally
 * dependent on the smart object's implementation and semantic for the
 * given event.
 *
 * There is an infrastructure for introspection on smart objects'
 * events (see evas_smart_callbacks_descriptions_get()), but no
 * internal smart objects on Evas implement them yet.
 *
 * @see @ref Evas_Smart_Object_Group_Callbacks for more details.
 *
 * @see evas_object_smart_callback_del()
 * @ingroup Evas_Smart_Object_Group
 */
EAPI void         evas_object_smart_callback_add(Evas_Object *obj, const char *event, Evas_Smart_Cb func, const void *data) EINA_ARG_NONNULL(1, 2, 3);

/**
 * Add (register) a callback function to the smart event specified by
 * @p event on the smart object @p obj. Except for the priority field,
 * it's exactly the same as @ref evas_object_smart_callback_add
 *
 * @param obj a smart object
 * @param event the event's name string
 * @param priority The priority of the callback, lower values called first.
 * @param func the callback function
 * @param data user data to be passed to the callback function
 *
 * @see evas_object_smart_callback_add
 * @since 1.1
 * @ingroup Evas_Smart_Object_Group
 */
EAPI void         evas_object_smart_callback_priority_add(Evas_Object *obj, const char *event, Evas_Callback_Priority priority, Evas_Smart_Cb func, const void *data);

/**
 * Delete (unregister) a callback function from the smart event
 * specified by @p event on the smart object @p obj.
 *
 * @param obj a smart object
 * @param event the event's name string
 * @param func the callback function
 * @return the data pointer
 *
 * This function removes <b>the first</b> added smart callback on the
 * object @p obj matching the event name @p event and the registered
 * function pointer @p func. If the removal is successful it will also
 * return the data pointer that was passed to
 * evas_object_smart_callback_add() (that will be the same as the
 * parameter) when the callback(s) was(were) added to the canvas. If
 * not successful @c NULL will be returned.
 *
 * @see evas_object_smart_callback_add() for more details.
 *
 * @ingroup Evas_Smart_Object_Group
 */
EAPI void        *evas_object_smart_callback_del(Evas_Object *obj, const char *event, Evas_Smart_Cb func) EINA_ARG_NONNULL(1, 2, 3);

/**
 * Delete (unregister) a callback function from the smart event
 * specified by @p event on the smart object @p obj.
 *
 * @param obj a smart object
 * @param event the event's name string
 * @param func the callback function
 * @param data the data pointer that was passed to the callback
 * @return the data pointer
 *
 * This function removes <b>the first</b> added smart callback on the
 * object @p obj matching the event name @p event, the registered
 * function pointer @p func and the callback data pointer @p data. If
 * the removal is successful it will also return the data pointer that
 * was passed to evas_object_smart_callback_add() (that will be the same
 * as the parameter) when the callback(s) was(were) added to the canvas.
 * If not successful @c NULL will be returned. A common use would be to
 * remove an exact match of a callback
 *
 * @see evas_object_smart_callback_add() for more details.
 * @since 1.2
 * @ingroup Evas_Smart_Object_Group
 *
 * @note To delete all smart event callbacks which match @p type and @p func,
 * use evas_object_smart_callback_del().
 */
EAPI void        *evas_object_smart_callback_del_full(Evas_Object *obj, const char *event, Evas_Smart_Cb func, const void *data) EINA_ARG_NONNULL(1, 2, 3);

/**
 * Call a given smart callback on the smart object @p obj.
 *
 * @param obj the smart object
 * @param event the event's name string
 * @param event_info pointer to an event specific struct or information to
 * pass to the callback functions registered on this smart event
 *
 * This should be called @b internally, from the smart object's own
 * code, when some specific event has occurred and the implementor
 * wants is to pertain to the object's events API (see @ref
 * Evas_Smart_Object_Group_Callbacks). The documentation for the smart
 * object should include a list of possible events and what type of @p
 * event_info to expect for each of them. Also, when defining an
 * #Evas_Smart_Class, smart object implementors are strongly
 * encouraged to properly set the Evas_Smart_Class::callbacks
 * callbacks description array, so that the users of the smart object
 * can have introspection on its events API <b>at run time</b>.
 *
 * @ingroup Evas_Smart_Object_Group
 */
EAPI void         evas_object_smart_callback_call(Evas_Object *obj, const char *event, void *event_info) EINA_ARG_NONNULL(1, 2);

/**
 * Set an smart object @b instance's smart callbacks descriptions.
 *
 * @param obj A smart object
 * @param descriptions @c NULL terminated array with
 * #Evas_Smart_Cb_Description descriptions. Array elements won't be
 * modified at run time, but references to them and their contents
 * will be made, so this array should be kept alive during the whole
 * object's lifetime.
 * @return @c EINA_TRUE on success, @c EINA_FALSE on failure.
 *
 * These descriptions are hints to be used by introspection and are
 * not enforced in any way.
 *
 * It will not be checked if instance callbacks descriptions have the
 * same name as respective possibly registered in the smart object
 * @b class. Both are kept in different arrays and users of
 * evas_object_smart_callbacks_descriptions_get() should handle this
 * case as they wish.
 *
 * @note Becase @p descriptions must be @c NULL terminated, and
 *        because a @c NULL name makes little sense, too,
 *        Evas_Smart_Cb_Description::name must @b not be @c NULL.
 *
 * @note While instance callbacks descriptions are possible, they are
 *       @b not recommended. Use @b class callbacks descriptions
 *       instead as they make you smart object user's life simpler and
 *       will use less memory, as descriptions and arrays will be
 *       shared among all instances.
 *
 * @ingroup Evas_Smart_Object_Group
 */
EAPI Eina_Bool    evas_object_smart_callbacks_descriptions_set(Evas_Object *obj, const Evas_Smart_Cb_Description *descriptions) EINA_ARG_NONNULL(1);

/**
 * Retrieve an smart object's know smart callback descriptions (both
 * instance and class ones).
 *
 * @param obj The smart object to get callback descriptions from.
 * @param class_descriptions Where to store class callbacks
 *        descriptions array, if any is known. If no descriptions are
 *        known, @c NULL is returned
 * @param class_count Returns how many class callbacks descriptions
 *        are known.
 * @param instance_descriptions Where to store instance callbacks
 *        descriptions array, if any is known. If no descriptions are
 *        known, @c NULL is returned.
 * @param instance_count Returns how many instance callbacks
 *        descriptions are known.
 *
 * This call searches for registered callback descriptions for both
 * instance and class of the given smart object. These arrays will be
 * sorted by Evas_Smart_Cb_Description::name and also @c NULL
 * terminated, so both @a class_count and @a instance_count can be
 * ignored, if the caller wishes so. The terminator @c NULL is not
 * counted in these values.
 *
 * @note If just class descriptions are of interest, try
 *       evas_smart_callbacks_descriptions_get() instead.
 *
 * @note Use @c NULL pointers on the descriptions/counters you're not
 * interested in: they'll be ignored by the function.
 *
 * @see evas_smart_callbacks_descriptions_get()
 *
 * @ingroup Evas_Smart_Object_Group
 */
EAPI void         evas_object_smart_callbacks_descriptions_get(const Evas_Object *obj, const Evas_Smart_Cb_Description ***class_descriptions, unsigned int *class_count, const Evas_Smart_Cb_Description ***instance_descriptions, unsigned int *instance_count) EINA_ARG_NONNULL(1);

/**
 * Find callback description for callback called @a name.
 *
 * @param obj the smart object.
 * @param name name of desired callback, must @b not be @c NULL.  The
 *        search have a special case for @a name being the same
 *        pointer as registered with Evas_Smart_Cb_Description, one
 *        can use it to avoid excessive use of strcmp().
 * @param class_description pointer to return class description or
 *        @c NULL if not found. If parameter is @c NULL, no search will
 *        be done on class descriptions.
 * @param instance_description pointer to return instance description
 *        or @c NULL if not found. If parameter is @c NULL, no search
 *        will be done on instance descriptions.
 * @return reference to description if found, @c NULL if not found.
 */
EAPI void         evas_object_smart_callback_description_find(const Evas_Object *obj, const char *name, const Evas_Smart_Cb_Description **class_description, const Evas_Smart_Cb_Description **instance_description) EINA_ARG_NONNULL(1, 2);

/**
 * Retrieve an Evas smart object's interface, by name string pointer.
 *
 * @param obj An Evas smart object.
 * @param name Name string of the desired interface, which must be the
 *             same pointer used at the interface's declarion, when
 *             creating the smart object @a obj.
 *
 * @since 1.7
 *
 * @return The interface's handle pointer, if found, @c NULL
 * otherwise.
 */
const void       *evas_object_smart_interface_get(const Evas_Object *obj, const char *name);

/**
 * Retrieve an Evas smart object interface's <b>private data</b>.
 *
 * @param obj An Evas smart object.
 * @param iface The given object's interface handle.
 *
 * @since 1.7
 *
 * @return The object interface's private data blob pointer, if found,
 * @c NULL otherwise.
 */
void             *evas_object_smart_interface_data_get(const Evas_Object *obj, const Evas_Smart_Interface *iface);

/**
 * Mark smart object as changed, dirty.
 *
 * @param obj The given Evas smart object
 *
 * This will flag the given object as needing recalculation,
 * forcefully. As an effect, on the next rendering cycle its @b
 * calculate() (see #Evas_Smart_Class) smart function will be called.
 *
 * @see evas_object_smart_need_recalculate_set().
 * @see evas_object_smart_calculate().
 *
 * @ingroup Evas_Smart_Object_Group
 */
EAPI void         evas_object_smart_changed(Evas_Object *obj) EINA_ARG_NONNULL(1);

/**
 * Set or unset the flag signalling that a given smart object needs to
 * get recalculated.
 *
 * @param obj the smart object
 * @param value whether one wants to set (@c EINA_TRUE) or to unset
 * (@c EINA_FALSE) the flag.
 *
 * If this flag is set, then the @c calculate() smart function of @p
 * obj will be called, if one is provided, during rendering phase of
 * Evas (see evas_render()), after which this flag will be
 * automatically unset.
 *
 * If that smart function is not provided for the given object, this
 * flag will be left unchanged.
 *
 * @note just setting this flag will not make the canvas' whole scene
 *       dirty, by itself, and evas_render() will have no effect. To
 *       force that, use evas_object_smart_changed(), that will also
 *       call this function automatically, with @c EINA_TRUE as parameter.
 *
 * @see evas_object_smart_need_recalculate_get()
 * @see evas_object_smart_calculate()
 * @see evas_smart_objects_calculate()
 *
 * @ingroup Evas_Smart_Object_Group
 */
EAPI void         evas_object_smart_need_recalculate_set(Evas_Object *obj, Eina_Bool value) EINA_ARG_NONNULL(1);

/**
 * Get the value of the flag signalling that a given smart object needs to
 * get recalculated.
 *
 * @param obj the smart object
 * @return if flag is set or not.
 *
 * @note this flag will be unset during the rendering phase, when the
 *       @c calculate() smart function is called, if one is provided.
 *       If it's not provided, then the flag will be left unchanged
 *       after the rendering phase.
 *
 * @see evas_object_smart_need_recalculate_set(), for more details
 *
 * @ingroup Evas_Smart_Object_Group
 */
EAPI Eina_Bool    evas_object_smart_need_recalculate_get(const Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Call the @b calculate() smart function immediately on a given smart
 * object.
 *
 * @param obj the smart object's handle
 *
 * This will force immediate calculations (see #Evas_Smart_Class)
 * needed for renderization of this object and, besides, unset the
 * flag on it telling it needs recalculation for the next rendering
 * phase.
 *
 * @see evas_object_smart_need_recalculate_set()
 *
 * @ingroup Evas_Smart_Object_Group
 */
EAPI void         evas_object_smart_calculate(Evas_Object *obj) EINA_ARG_NONNULL(1);

/**
 * Call user-provided @c calculate() smart functions and unset the
 * flag signalling that the object needs to get recalculated to @b all
 * smart objects in the canvas.
 *
 * @param e The canvas to calculate all smart objects in
 *
 * @see evas_object_smart_need_recalculate_set()
 *
 * @ingroup Evas_Smart_Object_Group
 */
EAPI void         evas_smart_objects_calculate(Evas *e);

/**
 * This gets the internal counter that counts the number of smart calculations
 *
 * @param e The canvas to get the calculate counter from
 *
 * Whenever evas performs smart object calculations on the whole canvas
 * it increments a counter by 1. This is the smart object calculate counter
 * that this function returns the value of. It starts at the value of 0 and
 * will increase (and eventually wrap around to negative values and so on) by
 * 1 every time objects are calculated. You can use this counter to ensure
 * you don't re-do calculations withint the same calculation generation/run
 * if the calculations maybe cause self-feeding effects.
 *
 * @ingroup Evas_Smart_Object_Group
 * @since 1.1
 */
EAPI int          evas_smart_objects_calculate_count_get(const Evas *e);

/**
 * Moves all children objects of a given smart object relative to a
 * given offset.
 *
 * @param obj the smart object.
 * @param dx horizontal offset (delta).
 * @param dy vertical offset (delta).
 *
 * This will make each of @p obj object's children to move, from where
 * they before, with those delta values (offsets) on both directions.
 *
 * @note This is most useful on custom smart @c move() functions.
 *
 * @note Clipped smart objects already make use of this function on
 * their @c move() smart function definition.
 */
EAPI void         evas_object_smart_move_children_relative(Evas_Object *obj, Evas_Coord dx, Evas_Coord dy) EINA_ARG_NONNULL(1);
/**
 * @}
 */

/**
 * @ingroup Evas_Smart_Object_Clipped
 *
 * @{
 */
/**
 * Get the clipper object for the given clipped smart object.
 *
 * @param obj the clipped smart object to retrieve associated clipper
 * from.
 * @return the clipper object.
 *
 * Use this function if you want to change any of this clipper's
 * properties, like colors.
 *
 * @see evas_object_smart_clipped_smart_add()
 */
EAPI Evas_Object            *evas_object_smart_clipped_clipper_get(Evas_Object *obj) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * @}
 */

/**
 * @ingroup Evas_Object_Box
 *
 * @{
 */
/**
 * Set a new layouting function to a given box object
 *
 * @param o The box object to operate on.
 * @param cb The new layout function to set on @p o.
 * @param data Data pointer to be passed to @p cb.
 * @param free_data Function to free @p data, if need be.
 *
 * A box layout function affects how a box object displays child
 * elements within its area. The list of pre-defined box layouts
 * available in Evas is:
 * - evas_object_box_layout_horizontal()
 * - evas_object_box_layout_vertical()
 * - evas_object_box_layout_homogeneous_horizontal()
 * - evas_object_box_layout_homogeneous_vertical()
 * - evas_object_box_layout_homogeneous_max_size_horizontal()
 * - evas_object_box_layout_homogeneous_max_size_vertical()
 * - evas_object_box_layout_flow_horizontal()
 * - evas_object_box_layout_flow_vertical()
 * - evas_object_box_layout_stack()
 *
 * Refer to each of their documentation texts for details on them.
 *
 * @note A box layouting function will be triggered by the @c
 * 'calculate' smart callback of the box's smart class.
 */
EAPI void                       evas_object_box_layout_set(Evas_Object *o, Evas_Object_Box_Layout cb, const void *data, void (*free_data)(void *data)) EINA_ARG_NONNULL(1, 2);

/**
 * Add a new box object on the provided canvas.
 *
 * @param evas The canvas to create the box object on.
 * @return @c NULL on error, a pointer to a new box object on
 * success.
 *
 * After instantiation, if a box object hasn't its layout function
 * set, via evas_object_box_layout_set(), it will have it by default
 * set to evas_object_box_layout_horizontal(). The remaining
 * properties of the box must be set/retrieved via
 * <c>evas_object_box_{h,v}_{align,padding}_{get,set)()</c>.
 */
EAPI Evas_Object               *evas_object_box_add(Evas *evas) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1) EINA_MALLOC;

/**
 * Add a new box as a @b child of a given smart object.
 *
 * @param parent The parent smart object to put the new box in.
 * @return @c NULL on error, a pointer to a new box object on
 * success.
 *
 * This is a helper function that has the same effect of putting a new
 * box object into @p parent by use of evas_object_smart_member_add().
 *
 * @see evas_object_box_add()
 */
EAPI Evas_Object               *evas_object_box_add_to(Evas_Object *parent) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1) EINA_MALLOC;

/**
 * Layout function which sets the box @a o to a (basic) horizontal box
 *
 * @param o The box object in question
 * @param priv The smart data of the @p o
 * @param data The data pointer passed on
 * evas_object_box_layout_set(), if any
 *
 * In this layout, the box object's overall behavior is controlled by
 * its padding/alignment properties, which are set by the
 * <c>evas_object_box_{h,v}_{align,padding}_set()</c> family of
 * functions. The size hints of the elements in the box -- set by the
 * <c>evas_object_size_hint_{align,padding,weight}_set()</c> functions
 * -- also control the way this function works.
 *
 * \par Box's properties:
 * @c align_h controls the horizontal alignment of the child objects
 * relative to the containing box. When set to @c 0.0, children are
 * aligned to the left. A value of @c 1.0 makes them aligned to the
 * right border. Values in between align them proportionally. Note
 * that if the size required by the children, which is given by their
 * widths and the @c padding_h property of the box, is bigger than the
 * their container's width, the children will be displayed out of the
 * box's bounds. A negative value of @c align_h makes the box to
 * @b justify its children. The padding between them, in this case, is
 * corrected so that the leftmost one touches the left border and the
 * rightmost one touches the right border (even if they must
 * overlap). The @c align_v and @c padding_v properties of the box
 * @b don't contribute to its behaviour when this layout is chosen.
 *
 * \par Child element's properties:
 * @c align_x does @b not influence the box's behavior. @c padding_l
 * and @c padding_r sum up to the container's horizontal padding
 * between elements. The child's @c padding_t, @c padding_b and
 * @c align_y properties apply for padding/alignment relative to the
 * overall height of the box. Finally, there is the @c weight_x
 * property, which, if set to a non-zero value, tells the container
 * that the child width is @b not pre-defined. If the container can't
 * accommodate all its children, it sets the widths of the ones
 * <b>with weights</b> to sizes as small as they can all fit into
 * it. If the size required by the children is less than the
 * available, the box increases its childrens' (which have weights)
 * widths as to fit the remaining space. The @c weight_x property,
 * besides telling the element is resizable, gives a @b weight for the
 * resizing process.  The parent box will try to distribute (or take
 * off) widths accordingly to the @b normalized list of weights: most
 * weighted children remain/get larger in this process than the least
 * ones. @c weight_y does not influence the layout.
 *
 * If one desires that, besides having weights, child elements must be
 * resized bounded to a minimum or maximum size, those size hints must
 * be set, by the <c>evas_object_size_hint_{min,max}_set()</c>
 * functions.
 */
EAPI void                       evas_object_box_layout_horizontal(Evas_Object *o, Evas_Object_Box_Data *priv, void *data) EINA_ARG_NONNULL(1, 2);

/**
 * Layout function which sets the box @a o to a (basic) vertical box
 *
 * This function behaves analogously to
 * evas_object_box_layout_horizontal(). The description of its
 * behaviour can be derived from that function's documentation.
 */
EAPI void                       evas_object_box_layout_vertical(Evas_Object *o, Evas_Object_Box_Data *priv, void *data) EINA_ARG_NONNULL(1, 2);

/**
 * Layout function which sets the box @a o to a @b homogeneous
 * vertical box
 *
 * This function behaves analogously to
 * evas_object_box_layout_homogeneous_horizontal().  The description
 * of its behaviour can be derived from that function's documentation.
 */
EAPI void                       evas_object_box_layout_homogeneous_vertical(Evas_Object *o, Evas_Object_Box_Data *priv, void *data) EINA_ARG_NONNULL(1, 2);

/**
 * Layout function which sets the box @a o to a @b homogeneous
 * horizontal box
 *
 * @param o The box object in question
 * @param priv The smart data of the @p o
 * @param data The data pointer passed on
 * evas_object_box_layout_set(), if any
 *
 * In a homogeneous horizontal box, its width is divided @b equally
 * between the contained objects. The box's overall behavior is
 * controlled by its padding/alignment properties, which are set by
 * the <c>evas_object_box_{h,v}_{align,padding}_set()</c> family of
 * functions.  The size hints the elements in the box -- set by the
 * <c>evas_object_size_hint_{align,padding,weight}_set()</c> functions
 * -- also control the way this function works.
 *
 * \par Box's properties:
 * @c align_h has no influence on the box for this layout.
 * @c padding_h tells the box to draw empty spaces of that size, in
 * pixels, between the (equal) child objects' cells. The @c align_v
 * and @c padding_v properties of the box don't contribute to its
 * behaviour when this layout is chosen.
 *
 * \par Child element's properties:
 * @c padding_l and @c padding_r sum up to the required width of the
 * child element. The @c align_x property tells the relative position
 * of this overall child width in its allocated cell (@c 0.0 to
 * extreme left, @c 1.0 to extreme right). A value of @c -1.0 to
 * @c align_x makes the box try to resize this child element to the exact
 * width of its cell (respecting the minimum and maximum size hints on
 * the child's width and accounting for its horizontal padding
 * hints). The child's @c padding_t, @c padding_b and @c align_y
 * properties apply for padding/alignment relative to the overall
 * height of the box. A value of @c -1.0 to @c align_y makes the box
 * try to resize this child element to the exact height of its parent
 * (respecting the maximum size hint on the child's height).
 */
EAPI void                       evas_object_box_layout_homogeneous_horizontal(Evas_Object *o, Evas_Object_Box_Data *priv, void *data) EINA_ARG_NONNULL(1, 2);

/**
 * Layout function which sets the box @a o to a <b>maximum size,
 * homogeneous</b> horizontal box
 *
 * @param o The box object in question
 * @param priv The smart data of the @p o
 * @param data The data pointer passed on
 * evas_object_box_layout_set(), if any
 *
 * In a maximum size, homogeneous horizontal box, besides having cells
 * of <b>equal size</b> reserved for the child objects, this size will
 * be defined by the size of the @b largest child in the box (in
 * width). The box's overall behavior is controlled by its properties,
 * which are set by the
 * <c>evas_object_box_{h,v}_{align,padding}_set()</c> family of
 * functions.  The size hints of the elements in the box -- set by the
 * <c>evas_object_size_hint_{align,padding,weight}_set()</c> functions
 * -- also control the way this function works.
 *
 * \par Box's properties:
 * @c padding_h tells the box to draw empty spaces of that size, in
 * pixels, between the child objects' cells. @c align_h controls the
 * horizontal alignment of the child objects, relative to the
 * containing box. When set to @c 0.0, children are aligned to the
 * left. A value of @c 1.0 lets them aligned to the right
 * border. Values in between align them proportionally. A negative
 * value of @c align_h makes the box to @b justify its children
 * cells. The padding between them, in this case, is corrected so that
 * the leftmost one touches the left border and the rightmost one
 * touches the right border (even if they must overlap). The
 * @c align_v and @c padding_v properties of the box don't contribute to
 * its behaviour when this layout is chosen.
 *
 * \par Child element's properties:
 * @c padding_l and @c padding_r sum up to the required width of the
 * child element. The @c align_x property tells the relative position
 * of this overall child width in its allocated cell (@c 0.0 to
 * extreme left, @c 1.0 to extreme right). A value of @c -1.0 to
 * @c align_x makes the box try to resize this child element to the exact
 * width of its cell (respecting the minimum and maximum size hints on
 * the child's width and accounting for its horizontal padding
 * hints). The child's @c padding_t, @c padding_b and @c align_y
 * properties apply for padding/alignment relative to the overall
 * height of the box. A value of @c -1.0 to @c align_y makes the box
 * try to resize this child element to the exact height of its parent
 * (respecting the max hint on the child's height).
 */
EAPI void                       evas_object_box_layout_homogeneous_max_size_horizontal(Evas_Object *o, Evas_Object_Box_Data *priv, void *data) EINA_ARG_NONNULL(1, 2);

/**
 * Layout function which sets the box @a o to a <b>maximum size,
 * homogeneous</b> vertical box
 *
 * This function behaves analogously to
 * evas_object_box_layout_homogeneous_max_size_horizontal(). The
 * description of its behaviour can be derived from that function's
 * documentation.
 */
EAPI void                       evas_object_box_layout_homogeneous_max_size_vertical(Evas_Object *o, Evas_Object_Box_Data *priv, void *data) EINA_ARG_NONNULL(1, 2);

/**
 * Layout function which sets the box @a o to a @b flow horizontal
 * box.
 *
 * @param o The box object in question
 * @param priv The smart data of the @p o
 * @param data The data pointer passed on
 * evas_object_box_layout_set(), if any
 *
 * In a flow horizontal box, the box's child elements are placed in
 * @b rows (think of text as an analogy). A row has as much elements as
 * can fit into the box's width. The box's overall behavior is
 * controlled by its properties, which are set by the
 * <c>evas_object_box_{h,v}_{align,padding}_set()</c> family of
 * functions.  The size hints of the elements in the box -- set by the
 * <c>evas_object_size_hint_{align,padding,weight}_set()</c> functions
 * -- also control the way this function works.
 *
 * \par Box's properties:
 * @c padding_h tells the box to draw empty spaces of that size, in
 * pixels, between the child objects' cells. @c align_h dictates the
 * horizontal alignment of the rows (@c 0.0 to left align them, @c 1.0
 * to right align). A value of @c -1.0 to @c align_h lets the rows
 * @b justified horizontally. @c align_v controls the vertical alignment
 * of the entire set of rows (@c 0.0 to top, @c 1.0 to bottom). A
 * value of @c -1.0 to @c align_v makes the box to @b justify the rows
 * vertically. The padding between them, in this case, is corrected so
 * that the first row touches the top border and the last one touches
 * the bottom border (even if they must overlap). @c padding_v has no
 * influence on the layout.
 *
 * \par Child element's properties:
 * @c padding_l and @c padding_r sum up to the required width of the
 * child element. The @c align_x property has no influence on the
 * layout. The child's @c padding_t and @c padding_b sum up to the
 * required height of the child element and is the only means (besides
 * row justifying) of setting space between rows. Note, however, that
 * @c align_y dictates positioning relative to the <b>largest
 * height</b> required by a child object in the actual row.
 */
EAPI void                       evas_object_box_layout_flow_horizontal(Evas_Object *o, Evas_Object_Box_Data *priv, void *data) EINA_ARG_NONNULL(1, 2);

/**
 * Layout function which sets the box @a o to a @b flow vertical box.
 *
 * This function behaves analogously to
 * evas_object_box_layout_flow_horizontal(). The description of its
 * behaviour can be derived from that function's documentation.
 */
EAPI void                       evas_object_box_layout_flow_vertical(Evas_Object *o, Evas_Object_Box_Data *priv, void *data) EINA_ARG_NONNULL(1, 2);

/**
 * Layout function which sets the box @a o to a @b stacking box
 *
 * @param o The box object in question
 * @param priv The smart data of the @p o
 * @param data The data pointer passed on
 * evas_object_box_layout_set(), if any
 *
 * In a stacking box, all children will be given the same size -- the
 * box's own size -- and they will be stacked one above the other, so
 * that the first object in @p o's internal list of child elements
 * will be the bottommost in the stack.
 *
 * \par Box's properties:
 * No box properties are used.
 *
 * \par Child element's properties:
 * @c padding_l and @c padding_r sum up to the required width of the
 * child element. The @c align_x property tells the relative position
 * of this overall child width in its allocated cell (@c 0.0 to
 * extreme left, @c 1.0 to extreme right). A value of @c -1.0 to @c
 * align_x makes the box try to resize this child element to the exact
 * width of its cell (respecting the min and max hints on the child's
 * width and accounting for its horizontal padding properties). The
 * same applies to the vertical axis.
 */
EAPI void                       evas_object_box_layout_stack(Evas_Object *o, Evas_Object_Box_Data *priv, void *data) EINA_ARG_NONNULL(1, 2);

/**
 * Set the alignment of the whole bounding box of contents, for a
 * given box object.
 *
 * @param o The given box object to set alignment from
 * @param horizontal The horizontal alignment, in pixels
 * @param vertical the vertical alignment, in pixels
 *
 * This will influence how a box object is to align its bounding box
 * of contents within its own area. The values @b must be in the range
 * @c 0.0 - @c 1.0, or undefined behavior is expected. For horizontal
 * alignment, @c 0.0 means to the left, with @c 1.0 meaning to the
 * right. For vertical alignment, @c 0.0 means to the top, with @c 1.0
 * meaning to the bottom.
 *
 * @note The default values for both alignments is @c 0.5.
 *
 * @see evas_object_box_align_get()
 */
EAPI void                       evas_object_box_align_set(Evas_Object *o, double horizontal, double vertical) EINA_ARG_NONNULL(1);

/**
 * Get the alignment of the whole bounding box of contents, for a
 * given box object.
 *
 * @param o The given box object to get alignment from
 * @param horizontal Pointer to a variable where to store the
 * horizontal alignment
 * @param vertical Pointer to a variable where to store the vertical
 * alignment
 *
 * @see evas_object_box_align_set() for more information
 */
EAPI void                       evas_object_box_align_get(const Evas_Object *o, double *horizontal, double *vertical) EINA_ARG_NONNULL(1);

/**
 * Set the (space) padding between cells set for a given box object.
 *
 * @param o The given box object to set padding from
 * @param horizontal The horizontal padding, in pixels
 * @param vertical the vertical padding, in pixels
 *
 * @note The default values for both padding components is @c 0.
 *
 * @see evas_object_box_padding_get()
 */
EAPI void                       evas_object_box_padding_set(Evas_Object *o, Evas_Coord horizontal, Evas_Coord vertical) EINA_ARG_NONNULL(1);

/**
 * Get the (space) padding between cells set for a given box object.
 *
 * @param o The given box object to get padding from
 * @param horizontal Pointer to a variable where to store the
 * horizontal padding
 * @param vertical Pointer to a variable where to store the vertical
 * padding
 *
 * @see evas_object_box_padding_set()
 */
EAPI void                       evas_object_box_padding_get(const Evas_Object *o, Evas_Coord *horizontal, Evas_Coord *vertical) EINA_ARG_NONNULL(1);

/**
 * Append a new @a child object to the given box object @a o.
 *
 * @param o The given box object
 * @param child A child Evas object to be made a member of @p o
 * @return A box option bound to the recently added box item or @c
 * NULL, on errors
 *
 * On success, the @c "child,added" smart event will take place.
 *
 * @note The actual placing of the item relative to @p o's area will
 * depend on the layout set to it. For example, on horizontal layouts
 * an item in the end of the box's list of children will appear on its
 * right.
 *
 * @note This call will trigger the box's _Evas_Object_Box_Api::append
 * smart function.
 */
EAPI Evas_Object_Box_Option    *evas_object_box_append(Evas_Object *o, Evas_Object *child) EINA_ARG_NONNULL(1, 2);

/**
 * Prepend a new @a child object to the given box object @a o.
 *
 * @param o The given box object
 * @param child A child Evas object to be made a member of @p o
 * @return A box option bound to the recently added box item or @c
 * NULL, on errors
 *
 * On success, the @c "child,added" smart event will take place.
 *
 * @note The actual placing of the item relative to @p o's area will
 * depend on the layout set to it. For example, on horizontal layouts
 * an item in the beginning of the box's list of children will appear
 * on its left.
 *
 * @note This call will trigger the box's
 * _Evas_Object_Box_Api::prepend smart function.
 */
EAPI Evas_Object_Box_Option    *evas_object_box_prepend(Evas_Object *o, Evas_Object *child) EINA_ARG_NONNULL(1, 2);

/**
 * Insert a new @a child object <b>before another existing one</b>, in
 * a given box object @a o.
 *
 * @param o The given box object
 * @param child A child Evas object to be made a member of @p o
 * @param reference The child object to place this new one before
 * @return A box option bound to the recently added box item or @c
 * NULL, on errors
 *
 * On success, the @c "child,added" smart event will take place.
 *
 * @note This function will fail if @p reference is not a member of @p
 * o.
 *
 * @note The actual placing of the item relative to @p o's area will
 * depend on the layout set to it.
 *
 * @note This call will trigger the box's
 * _Evas_Object_Box_Api::insert_before smart function.
 */
EAPI Evas_Object_Box_Option    *evas_object_box_insert_before(Evas_Object *o, Evas_Object *child, const Evas_Object *reference) EINA_ARG_NONNULL(1, 2, 3);

/**
 * Insert a new @a child object <b>after another existing one</b>, in
 * a given box object @a o.
 *
 * @param o The given box object
 * @param child A child Evas object to be made a member of @p o
 * @param reference The child object to place this new one after
 * @return A box option bound to the recently added box item or @c
 * NULL, on errors
 *
 * On success, the @c "child,added" smart event will take place.
 *
 * @note This function will fail if @p reference is not a member of @p
 * o.
 *
 * @note The actual placing of the item relative to @p o's area will
 * depend on the layout set to it.
 *
 * @note This call will trigger the box's
 * _Evas_Object_Box_Api::insert_after smart function.
 */
EAPI Evas_Object_Box_Option    *evas_object_box_insert_after(Evas_Object *o, Evas_Object *child, const Evas_Object *reference) EINA_ARG_NONNULL(1, 2, 3);

/**
 * Insert a new @a child object <b>at a given position</b>, in a given
 * box object @a o.
 *
 * @param o The given box object
 * @param child A child Evas object to be made a member of @p o
 * @param pos The numeric position (starting from @c 0) to place the
 * new child object at
 * @return A box option bound to the recently added box item or @c
 * NULL, on errors
 *
 * On success, the @c "child,added" smart event will take place.
 *
 * @note This function will fail if the given position is invalid,
 * given @p o's internal list of elements.
 *
 * @note The actual placing of the item relative to @p o's area will
 * depend on the layout set to it.
 *
 * @note This call will trigger the box's
 * _Evas_Object_Box_Api::insert_at smart function.
 */
EAPI Evas_Object_Box_Option    *evas_object_box_insert_at(Evas_Object *o, Evas_Object *child, unsigned int pos) EINA_ARG_NONNULL(1, 2);

/**
 * Remove a given object from a box object, unparenting it again.
 *
 * @param o The box object to remove a child object from
 * @param child The handle to the child object to be removed
 * @return @c EINA_TRUE, on success, @c EINA_FALSE otherwise
 *
 * On removal, you'll get an unparented object again, just as it was
 * before you inserted it in the box. The
 * _Evas_Object_Box_Api::option_free box smart callback will be called
 * automatically for you and, also, the @c "child,removed" smart event
 * will take place.
 *
 * @note This call will trigger the box's _Evas_Object_Box_Api::remove
 * smart function.
 */
EAPI Eina_Bool                  evas_object_box_remove(Evas_Object *o, Evas_Object *child) EINA_ARG_NONNULL(1, 2);

/**
 * Remove an object, <b>bound to a given position</b> in a box object,
 * unparenting it again.
 *
 * @param o The box object to remove a child object from
 * @param pos The numeric position (starting from @c 0) of the child
 * object to be removed
 * @return @c EINA_TRUE, on success, @c EINA_FALSE otherwise
 *
 * On removal, you'll get an unparented object again, just as it was
 * before you inserted it in the box. The @c option_free() box smart
 * callback will be called automatically for you and, also, the
 * @c "child,removed" smart event will take place.
 *
 * @note This function will fail if the given position is invalid,
 * given @p o's internal list of elements.
 *
 * @note This call will trigger the box's
 * _Evas_Object_Box_Api::remove_at smart function.
 */
EAPI Eina_Bool                  evas_object_box_remove_at(Evas_Object *o, unsigned int pos) EINA_ARG_NONNULL(1);

/**
 * Remove @b all child objects from a box object, unparenting them
 * again.
 *
 * @param o The box object to remove a child object from
 * @param clear if true, it will delete just removed children.
 * @return @c EINA_TRUE, on success, @c EINA_FALSE otherwise
 *
 * This has the same effect of calling evas_object_box_remove() on
 * each of @p o's child objects, in sequence. If, and only if, all
 * those calls succeed, so does this one.
 */
EAPI Eina_Bool                  evas_object_box_remove_all(Evas_Object *o, Eina_Bool clear) EINA_ARG_NONNULL(1);

/**
 * Get an iterator to walk the list of children of a given box object.
 *
 * @param o The box to retrieve an items iterator from
 * @return An iterator on @p o's child objects, on success, or @c NULL,
 * on errors
 *
 * @note Do @b not remove or delete objects while walking the list.
 */
EAPI Eina_Iterator             *evas_object_box_iterator_new(const Evas_Object *o) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1) EINA_MALLOC;

/**
 * Get an accessor (a structure providing random items access) to the
 * list of children of a given box object.
 *
 * @param o The box to retrieve an items iterator from
 * @return An accessor on @p o's child objects, on success, or @c NULL,
 * on errors
 *
 * @note Do not remove or delete objects while walking the list.
 */
EAPI Eina_Accessor             *evas_object_box_accessor_new(const Evas_Object *o) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1) EINA_MALLOC;

/**
 * Get the list of children objects in a given box object.
 *
 * @param o The box to retrieve an items list from
 * @return A list of @p o's child objects, on success, or @c NULL,
 * on errors (or if it has no child objects)
 *
 * The returned list should be freed with @c eina_list_free() when you
 * no longer need it.
 *
 * @note This is a duplicate of the list kept by the box internally.
 *       It's up to the user to destroy it when it no longer needs it.
 *       It's possible to remove objects from the box when walking
 *       this list, but these removals won't be reflected on it.
 */
EAPI Eina_List                 *evas_object_box_children_get(const Evas_Object *o) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1) EINA_MALLOC;

/**
 * Get the name of the property of the child elements of the box @a o
 * which have @a id as identifier
 *
 * @param o The box to search child options from
 * @param property The numerical identifier of the option being searched,
 * for its name
 * @return The name of the given property or @c NULL, on errors.
 *
 * @note This call won't do anything for a canonical Evas box. Only
 * users which have @b subclassed it, setting custom box items options
 * (see #Evas_Object_Box_Option) on it, would benefit from this
 * function. They'd have to implement it and set it to be the
 * _Evas_Object_Box_Api::property_name_get smart class function of the
 * box, which is originally set to @c NULL.
 */
EAPI const char                *evas_object_box_option_property_name_get(const Evas_Object *o, int property) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Get the numerical identifier of the property of the child elements
 * of the box @a o which have @a name as name string
 *
 * @param o The box to search child options from
 * @param name The name string of the option being searched, for
 * its ID
 * @return The numerical ID of the given property or @c -1, on
 * errors.
 *
 * @note This call won't do anything for a canonical Evas box. Only
 * users which have @b subclassed it, setting custom box items options
 * (see #Evas_Object_Box_Option) on it, would benefit from this
 * function. They'd have to implement it and set it to be the
 * _Evas_Object_Box_Api::property_id_get smart class function of the
 * box, which is originally set to @c NULL.
 */
EAPI int                        evas_object_box_option_property_id_get(const Evas_Object *o, const char *name) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1, 2);

/**
 * Set a property value (by its given numerical identifier), on a
 * given box child element
 *
 * @param o The box parenting the child element
 * @param opt The box option structure bound to the child box element
 * to set a property on
 * @param property The numerical ID of the given property
 * @param ... (List of) actual value(s) to be set for this
 * property. It (they) @b must be of the same type the user has
 * defined for it (them).
 * @return @c EINA_TRUE on success, @c EINA_FALSE on failure.
 *
 * @note This call won't do anything for a canonical Evas box. Only
 * users which have @b subclassed it, setting custom box items options
 * (see #Evas_Object_Box_Option) on it, would benefit from this
 * function. They'd have to implement it and set it to be the
 * _Evas_Object_Box_Api::property_set smart class function of the box,
 * which is originally set to @c NULL.
 *
 * @note This function will internally create a variable argument
 * list, with the values passed after @p property, and call
 * evas_object_box_option_property_vset() with this list and the same
 * previous arguments.
 */
EAPI Eina_Bool                  evas_object_box_option_property_set(Evas_Object *o, Evas_Object_Box_Option *opt, int property, ...) EINA_ARG_NONNULL(1, 2);

/**
 * Set a property value (by its given numerical identifier), on a
 * given box child element -- by a variable argument list
 *
 * @param o The box parenting the child element
 * @param opt The box option structure bound to the child box element
 * to set a property on
 * @param property The numerical ID of the given property
 * @param args The variable argument list implementing the value to
 * be set for this property. It @b must be of the same type the user has
 * defined for it.
 * @return @c EINA_TRUE on success, @c EINA_FALSE on failure.
 *
 * This is a variable argument list variant of the
 * evas_object_box_option_property_set(). See its documentation for
 * more details.
 */
EAPI Eina_Bool                  evas_object_box_option_property_vset(Evas_Object *o, Evas_Object_Box_Option *opt, int property, va_list args) EINA_ARG_NONNULL(1, 2);

/**
 * Get a property's value (by its given numerical identifier), on a
 * given box child element
 *
 * @param o The box parenting the child element
 * @param opt The box option structure bound to the child box element
 * to get a property from
 * @param property The numerical ID of the given property
 * @param ... (List of) pointer(s) where to store the value(s) set for
 * this property. It (they) @b must point to variable(s) of the same
 * type the user has defined for it (them).
 * @return @c EINA_TRUE on success, @c EINA_FALSE on failure.
 *
 * @note This call won't do anything for a canonical Evas box. Only
 * users which have @b subclassed it, getting custom box items options
 * (see #Evas_Object_Box_Option) on it, would benefit from this
 * function. They'd have to implement it and get it to be the
 * _Evas_Object_Box_Api::property_get smart class function of the
 * box, which is originally get to @c NULL.
 *
 * @note This function will internally create a variable argument
 * list, with the values passed after @p property, and call
 * evas_object_box_option_property_vget() with this list and the same
 * previous arguments.
 */
EAPI Eina_Bool                  evas_object_box_option_property_get(const Evas_Object *o, Evas_Object_Box_Option *opt, int property, ...) EINA_ARG_NONNULL(1, 2);

/**
 * Get a property's value (by its given numerical identifier), on a
 * given box child element -- by a variable argument list
 *
 * @param o The box parenting the child element
 * @param opt The box option structure bound to the child box element
 * to get a property from
 * @param property The numerical ID of the given property
 * @param args The variable argument list with pointers to where to
 * store the values of this property. They @b must point to variables
 * of the same type the user has defined for them.
 * @return @c EINA_TRUE on success, @c EINA_FALSE on failure.
 *
 * This is a variable argument list variant of the
 * evas_object_box_option_property_get(). See its documentation for
 * more details.
 */
EAPI Eina_Bool                  evas_object_box_option_property_vget(const Evas_Object *o, Evas_Object_Box_Option *opt, int property, va_list args) EINA_ARG_NONNULL(1, 2);

/**
 * @}
 */

/**
 * @ingroup Evas_Object_Table
 *
 * @{
 */
/**
 * @brief Create a new table.
 *
 * @param evas Canvas in which table will be added.
 */
EAPI Evas_Object                       *evas_object_table_add(Evas *evas) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1) EINA_MALLOC;

/**
 * @brief Create a table that is child of a given element @a parent.
 *
 * @see evas_object_table_add()
 */
EAPI Evas_Object                       *evas_object_table_add_to(Evas_Object *parent) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1) EINA_MALLOC;

/**
 * @brief Set how this table should layout children.
 *
 * @todo consider aspect hint and respect it.
 *
 * @par EVAS_OBJECT_TABLE_HOMOGENEOUS_NONE
 * If table does not use homogeneous mode then columns and rows will
 * be calculated based on hints of individual cells. This operation
 * mode is more flexible, but more complex and heavy to calculate as
 * well. @b Weight properties are handled as a boolean expand. Negative
 * alignment will be considered as 0.5. This is the default.
 *
 * @todo @c EVAS_OBJECT_TABLE_HOMOGENEOUS_NONE should balance weight.
 *
 * @par EVAS_OBJECT_TABLE_HOMOGENEOUS_TABLE
 * When homogeneous is relative to table the own table size is divided
 * equally among children, filling the whole table area. That is, if
 * table has @c WIDTH and @c COLUMNS, each cell will get <tt>WIDTH /
 * COLUMNS</tt> pixels. If children have minimum size that is larger
 * than this amount (including padding), then it will overflow and be
 * aligned respecting the alignment hint, possible overlapping sibling
 * cells. @b Weight hint is used as a boolean, if greater than zero it
 * will make the child expand in that axis, taking as much space as
 * possible (bounded to maximum size hint). Negative alignment will be
 * considered as 0.5.
 *
 * @par EVAS_OBJECT_TABLE_HOMOGENEOUS_ITEM
 * When homogeneous is relative to item it means the greatest minimum
 * cell size will be used. That is, if no element is set to expand,
 * the table will have its contents to a minimum size, the bounding
 * box of all these children will be aligned relatively to the table
 * object using evas_object_table_align_get(). If the table area is
 * too small to hold this minimum bounding box, then the objects will
 * keep their size and the bounding box will overflow the box area,
 * still respecting the alignment. @b Weight hint is used as a
 * boolean, if greater than zero it will make that cell expand in that
 * axis, toggling the <b>expand mode</b>, which makes the table behave
 * much like @b EVAS_OBJECT_TABLE_HOMOGENEOUS_TABLE, except that the
 * bounding box will overflow and items will not overlap siblings. If
 * no minimum size is provided at all then the table will fallback to
 * expand mode as well.
 */
EAPI void                               evas_object_table_homogeneous_set(Evas_Object *o, Evas_Object_Table_Homogeneous_Mode homogeneous) EINA_ARG_NONNULL(1);

/**
 * Get the current layout homogeneous mode.
 *
 * @see evas_object_table_homogeneous_set()
 */
EAPI Evas_Object_Table_Homogeneous_Mode evas_object_table_homogeneous_get(const Evas_Object *o) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Set padding between cells.
 */
EAPI void                               evas_object_table_padding_set(Evas_Object *o, Evas_Coord horizontal, Evas_Coord vertical) EINA_ARG_NONNULL(1);

/**
 * Get padding between cells.
 */
EAPI void                               evas_object_table_padding_get(const Evas_Object *o, Evas_Coord *horizontal, Evas_Coord *vertical) EINA_ARG_NONNULL(1);

/**
 * Set the alignment of the whole bounding box of contents.
 */
EAPI void                               evas_object_table_align_set(Evas_Object *o, double horizontal, double vertical) EINA_ARG_NONNULL(1);

/**
 * Get alignment of the whole bounding box of contents.
 */
EAPI void                               evas_object_table_align_get(const Evas_Object *o, double *horizontal, double *vertical) EINA_ARG_NONNULL(1);

/**
 * Sets the mirrored mode of the table. In mirrored mode the table items go
 * from right to left instead of left to right. That is, 1,1 is top right, not
 * top left.
 *
 * @param o The table object.
 * @param mirrored the mirrored mode to set
 * @since 1.1
 */
EAPI void                               evas_object_table_mirrored_set(Evas_Object *o, Eina_Bool mirrored) EINA_ARG_NONNULL(1);

/**
 * Gets the mirrored mode of the table.
 *
 * @param o The table object.
 * @return @c EINA_TRUE if it's a mirrored table, @c EINA_FALSE otherwise.
 * @since 1.1
 * @see evas_object_table_mirrored_set()
 */
EAPI Eina_Bool                          evas_object_table_mirrored_get(const Evas_Object *o) EINA_ARG_NONNULL(1);

/**
 * Get packing location of a child of table
 *
 * @param o The given table object.
 * @param child The child object to add.
 * @param col pointer to store relative-horizontal position to place child.
 * @param row pointer to store relative-vertical position to place child.
 * @param colspan pointer to store how many relative-horizontal position to use for this child.
 * @param rowspan pointer to store how many relative-vertical position to use for this child.
 *
 * @return 1 on success, 0 on failure.
 * @since 1.1
 */
EAPI Eina_Bool                          evas_object_table_pack_get(const Evas_Object *o, Evas_Object *child, unsigned short *col, unsigned short *row, unsigned short *colspan, unsigned short *rowspan);

/**
 * Add a new child to a table object or set its current packing.
 *
 * @param o The given table object.
 * @param child The child object to add.
 * @param col relative-horizontal position to place child.
 * @param row relative-vertical position to place child.
 * @param colspan how many relative-horizontal position to use for this child.
 * @param rowspan how many relative-vertical position to use for this child.
 * 
 * Note that columns and rows only guarantee 16bit unsigned values at best.
 * That means that col + colspan AND row + rowspan must fit inside 16bit
 * unsigned values cleanly. You will be warned once values exceed 15bit
 * storage, and attempting to use values not able to fit in 16bits will
 * result in failure.
 *
 * @return 1 on success, 0 on failure.
 */
EAPI Eina_Bool                          evas_object_table_pack(Evas_Object *o, Evas_Object *child, unsigned short col, unsigned short row, unsigned short colspan, unsigned short rowspan) EINA_ARG_NONNULL(1, 2);

/**
 * Remove child from table.
 *
 * @note removing a child will immediately call a walk over children in order
 *       to recalculate numbers of columns and rows. If you plan to remove
 *       all children, use evas_object_table_clear() instead.
 *
 * @return 1 on success, 0 on failure.
 */
EAPI Eina_Bool                          evas_object_table_unpack(Evas_Object *o, Evas_Object *child) EINA_ARG_NONNULL(1, 2);

/**
 * Faster way to remove all child objects from a table object.
 *
 * @param o The given table object.
 * @param clear if true, it will delete just removed children.
 */
EAPI void                               evas_object_table_clear(Evas_Object *o, Eina_Bool clear) EINA_ARG_NONNULL(1);

/**
 * Get the number of columns and rows this table takes.
 *
 * @note columns and rows are virtual entities, one can specify a table
 *       with a single object that takes 4 columns and 5 rows. The only
 *       difference for a single cell table is that paddings will be
 *       accounted proportionally.
 */
EAPI void                               evas_object_table_col_row_size_get(const Evas_Object *o, int *cols, int *rows) EINA_ARG_NONNULL(1);

/**
 * Get an iterator to walk the list of children for the table.
 *
 * @note Do not remove or delete objects while walking the list.
 */
EAPI Eina_Iterator                     *evas_object_table_iterator_new(const Evas_Object *o) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1) EINA_MALLOC;

/**
 * Get an accessor to get random access to the list of children for the table.
 *
 * @note Do not remove or delete objects while walking the list.
 */
EAPI Eina_Accessor                     *evas_object_table_accessor_new(const Evas_Object *o) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1) EINA_MALLOC;

/**
 * Get the list of children for the table.
 *
 * @note This is a duplicate of the list kept by the table internally.
 *       It's up to the user to destroy it when it no longer needs it.
 *       It's possible to remove objects from the table when walking this
 *       list, but these removals won't be reflected on it.
 */
EAPI Eina_List                         *evas_object_table_children_get(const Evas_Object *o) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1) EINA_MALLOC;

/**
 * Get the child of the table at the given coordinates
 *
 * @note This does not take into account col/row spanning
 */
EAPI Evas_Object                       *evas_object_table_child_get(const Evas_Object *o, unsigned short col, unsigned short row) EINA_ARG_NONNULL(1);

/**
 * @}
 */

/**
 * @ingroup Evas_Object_Grid
 *
 * @{
 */
/**
 * Create a new grid.
 *
 * It's set to a virtual size of 1x1 by default and add children with
 * evas_object_grid_pack().
 * @since 1.1
 */
EAPI Evas_Object   *evas_object_grid_add(Evas *evas) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1) EINA_MALLOC;

/**
 * Create a grid that is child of a given element @a parent.
 *
 * @see evas_object_grid_add()
 * @since 1.1
 */
EAPI Evas_Object   *evas_object_grid_add_to(Evas_Object *parent) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1) EINA_MALLOC;

/**
 * Set the virtual resolution for the grid
 *
 * @param o The grid object to modify
 * @param w The virtual horizontal size (resolution) in integer units
 * @param h The virtual vertical size (resolution) in integer units
 * @since 1.1
 */
EAPI void           evas_object_grid_size_set(Evas_Object *o, int w, int h) EINA_ARG_NONNULL(1);

/**
 * Get the current virtual resolution
 *
 * @param o The grid object to query
 * @param w A pointer to an integer to store the virtual width
 * @param h A pointer to an integer to store the virtual height
 * @see evas_object_grid_size_set()
 * @since 1.1
 */
EAPI void           evas_object_grid_size_get(const Evas_Object *o, int *w, int *h) EINA_ARG_NONNULL(1);

/**
 * Sets the mirrored mode of the grid. In mirrored mode the grid items go
 * from right to left instead of left to right. That is, 0,0 is top right, not
 * to left.
 *
 * @param o The grid object.
 * @param mirrored the mirrored mode to set
 * @since 1.1
 */
EAPI void           evas_object_grid_mirrored_set(Evas_Object *o, Eina_Bool mirrored) EINA_ARG_NONNULL(1);

/**
 * Gets the mirrored mode of the grid.
 *
 * @param o The grid object.
 * @return @c EINA_TRUE if it's a mirrored grid, @c EINA_FALSE otherwise.
 * @see evas_object_grid_mirrored_set()
 * @since 1.1
 */
EAPI Eina_Bool      evas_object_grid_mirrored_get(const Evas_Object *o) EINA_ARG_NONNULL(1);

/**
 * Add a new child to a grid object.
 *
 * @param o The given grid object.
 * @param child The child object to add.
 * @param x The virtual x coordinate of the child
 * @param y The virtual y coordinate of the child
 * @param w The virtual width of the child
 * @param h The virtual height of the child
 * @return 1 on success, 0 on failure.
 * @since 1.1
 */
EAPI Eina_Bool      evas_object_grid_pack(Evas_Object *o, Evas_Object *child, int x, int y, int w, int h) EINA_ARG_NONNULL(1, 2);

/**
 * Remove child from grid.
 *
 * @note removing a child will immediately call a walk over children in order
 *       to recalculate numbers of columns and rows. If you plan to remove
 *       all children, use evas_object_grid_clear() instead.
 *
 * @return 1 on success, 0 on failure.
 * @since 1.1
 */
EAPI Eina_Bool      evas_object_grid_unpack(Evas_Object *o, Evas_Object *child) EINA_ARG_NONNULL(1, 2);

/**
 * Faster way to remove all child objects from a grid object.
 *
 * @param o The given grid object.
 * @param clear if true, it will delete just removed children.
 * @since 1.1
 */
EAPI void           evas_object_grid_clear(Evas_Object *o, Eina_Bool clear) EINA_ARG_NONNULL(1);

/**
 * Get the pack options for a grid child
 *
 * Get the pack x, y, width and height in virtual coordinates set by
 * evas_object_grid_pack()
 * @param o The grid object
 * @param child The grid child to query for coordinates
 * @param x The pointer to where the x coordinate will be returned
 * @param y The pointer to where the y coordinate will be returned
 * @param w The pointer to where the width will be returned
 * @param h The pointer to where the height will be returned
 * @return 1 on success, 0 on failure.
 * @since 1.1
 */
EAPI Eina_Bool      evas_object_grid_pack_get(const Evas_Object *o, Evas_Object *child, int *x, int *y, int *w, int *h);

/**
 * Get an iterator to walk the list of children for the grid.
 *
 * @note Do not remove or delete objects while walking the list.
 * @since 1.1
 */
EAPI Eina_Iterator *evas_object_grid_iterator_new(const Evas_Object *o) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1) EINA_MALLOC;

/**
 * Get an accessor to get random access to the list of children for the grid.
 *
 * @note Do not remove or delete objects while walking the list.
 * @since 1.1
 */
EAPI Eina_Accessor *evas_object_grid_accessor_new(const Evas_Object *o) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1) EINA_MALLOC;

/**
 * Get the list of children for the grid.
 *
 * @note This is a duplicate of the list kept by the grid internally.
 *       It's up to the user to destroy it when it no longer needs it.
 *       It's possible to remove objects from the grid when walking this
 *       list, but these removals won't be reflected on it.
 * @since 1.1
 */
EAPI Eina_List     *evas_object_grid_children_get(const Evas_Object *o) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1) EINA_MALLOC;

/**
 * @}
 */

/**
 * @ingroup Evas_Keys
 *
 * @{
 */
/**
 * Returns a handle to the list of modifier keys registered in the
 * canvas @p e. This is required to check for which modifiers are set
 * at a given time with the evas_key_modifier_is_set() function.
 *
 * @param e The pointer to the Evas canvas
 *
 * @see evas_key_modifier_add
 * @see evas_key_modifier_del
 * @see evas_key_modifier_on
 * @see evas_key_modifier_off
 * @see evas_key_modifier_is_set
 *
 * @return An ::Evas_Modifier handle to query Evas' keys subsystem
 *	with evas_key_modifier_is_set(), or @c NULL on error.
 */
EAPI const Evas_Modifier *evas_key_modifier_get(const Evas *e) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Returns a handle to the list of lock keys registered in the canvas
 * @p e. This is required to check for which locks are set at a given
 * time with the evas_key_lock_is_set() function.
 *
 * @param e The pointer to the Evas canvas
 *
 * @see evas_key_lock_add
 * @see evas_key_lock_del
 * @see evas_key_lock_on
 * @see evas_key_lock_off
 * @see evas_key_lock_is_set
 *
 * @return An ::Evas_Lock handle to query Evas' keys subsystem with
 *	evas_key_lock_is_set(), or @c NULL on error.
 */
EAPI const Evas_Lock     *evas_key_lock_get(const Evas *e) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1);

/**
 * Adds the @p keyname key to the current list of modifier keys.
 *
 * @param e The pointer to the Evas canvas
 * @param keyname The name of the modifier key to add to the list of
 *        Evas modifiers.
 *
 * Modifiers are keys like shift, alt and ctrl, i.e., keys which are
 * meant to be pressed together with others, altering the behavior of
 * the secondly pressed keys somehow. Evas is so that these keys can
 * be user defined.
 *
 * This call allows custom modifiers to be added to the Evas system at
 * run time. It is then possible to set and unset modifier keys
 * programmatically for other parts of the program to check and act
 * on. Programmers using Evas would check for modifier keys on key
 * event callbacks using evas_key_modifier_is_set().
 *
 * @see evas_key_modifier_del
 * @see evas_key_modifier_get
 * @see evas_key_modifier_on
 * @see evas_key_modifier_off
 * @see evas_key_modifier_is_set
 *
 * @note If the programmer instantiates the canvas by means of the
 *       ecore_evas_new() family of helper functions, Ecore will take
 *       care of registering on it all standard modifiers: "Shift",
 *       "Control", "Alt", "Meta", "Hyper", "Super".
 */
EAPI void                 evas_key_modifier_add(Evas *e, const char *keyname) EINA_ARG_NONNULL(1, 2);

/**
 * Removes the @p keyname key from the current list of modifier keys
 * on canvas @p e.
 *
 * @param e The pointer to the Evas canvas
 * @param keyname The name of the key to remove from the modifiers list.
 *
 * @see evas_key_modifier_add
 * @see evas_key_modifier_get
 * @see evas_key_modifier_on
 * @see evas_key_modifier_off
 * @see evas_key_modifier_is_set
 */
EAPI void                 evas_key_modifier_del(Evas *e, const char *keyname) EINA_ARG_NONNULL(1, 2);

/**
 * Adds the @p keyname key to the current list of lock keys.
 *
 * @param e The pointer to the Evas canvas
 * @param keyname The name of the key to add to the locks list.
 *
 * Locks are keys like caps lock, num lock or scroll lock, i.e., keys
 * which are meant to be pressed once -- toggling a binary state which
 * is bound to it -- and thus altering the behavior of all
 * subsequently pressed keys somehow, depending on its state. Evas is
 * so that these keys can be defined by the user.
 *
 * This allows custom locks to be added to the evas system at run
 * time. It is then possible to set and unset lock keys
 * programmatically for other parts of the program to check and act
 * on. Programmers using Evas would check for lock keys on key event
 * callbacks using evas_key_lock_is_set().
 *
 * @see evas_key_lock_get
 * @see evas_key_lock_del
 * @see evas_key_lock_on
 * @see evas_key_lock_off
 * @see evas_key_lock_is_set
 *
 * @note If the programmer instantiates the canvas by means of the
 *       ecore_evas_new() family of helper functions, Ecore will take
 *       care of registering on it all standard lock keys: "Caps_Lock",
 *       "Num_Lock", "Scroll_Lock".
 */
EAPI void                 evas_key_lock_add(Evas *e, const char *keyname) EINA_ARG_NONNULL(1, 2);

/**
 * Removes the @p keyname key from the current list of lock keys on
 * canvas @p e.
 *
 * @param e The pointer to the Evas canvas
 * @param keyname The name of the key to remove from the locks list.
 *
 * @see evas_key_lock_get
 * @see evas_key_lock_add
 * @see evas_key_lock_on
 * @see evas_key_lock_off
 */
EAPI void                 evas_key_lock_del(Evas *e, const char *keyname) EINA_ARG_NONNULL(1, 2);

/**
 * Enables or turns on programmatically the modifier key with name @p
 * keyname.
 *
 * @param e The pointer to the Evas canvas
 * @param keyname The name of the modifier to enable.
 *
 * The effect will be as if the key was pressed for the whole time
 * between this call and a matching evas_key_modifier_off().
 *
 * @see evas_key_modifier_add
 * @see evas_key_modifier_get
 * @see evas_key_modifier_off
 * @see evas_key_modifier_is_set
 */
EAPI void                 evas_key_modifier_on(Evas *e, const char *keyname) EINA_ARG_NONNULL(1, 2);

/**
 * Disables or turns off programmatically the modifier key with name
 * @p keyname.
 *
 * @param e The pointer to the Evas canvas
 * @param keyname The name of the modifier to disable.
 *
 * @see evas_key_modifier_add
 * @see evas_key_modifier_get
 * @see evas_key_modifier_on
 * @see evas_key_modifier_is_set
 */
EAPI void                 evas_key_modifier_off(Evas *e, const char *keyname) EINA_ARG_NONNULL(1, 2);

/**
 * Enables or turns on programmatically the lock key with name @p
 * keyname.
 *
 * @param e The pointer to the Evas canvas
 * @param keyname The name of the lock to enable.
 *
 * The effect will be as if the key was put on its active state after
 * this call.
 *
 * @see evas_key_lock_get
 * @see evas_key_lock_add
 * @see evas_key_lock_del
 * @see evas_key_lock_off
 */
EAPI void                 evas_key_lock_on(Evas *e, const char *keyname) EINA_ARG_NONNULL(1, 2);

/**
 * Disables or turns off programmatically the lock key with name @p
 * keyname.
 *
 * @param e The pointer to the Evas canvas
 * @param keyname The name of the lock to disable.
 *
 * The effect will be as if the key was put on its inactive state
 * after this call.
 *
 * @see evas_key_lock_get
 * @see evas_key_lock_add
 * @see evas_key_lock_del
 * @see evas_key_lock_on
 */
EAPI void                 evas_key_lock_off(Evas *e, const char *keyname) EINA_ARG_NONNULL(1, 2);

/**
 * Creates a bit mask from the @p keyname @b modifier key. Values
 * returned from different calls to it may be ORed together,
 * naturally.
 *
 * @param e The canvas whom to query the bit mask from.
 * @param keyname The name of the modifier key to create the mask for.
 *
 * @returns the bit mask or 0 if the @p keyname key wasn't registered as a
 *          modifier for canvas @p e.
 *
 * This function is meant to be using in conjunction with
 * evas_object_key_grab()/evas_object_key_ungrab(). Go check their
 * documentation for more information.
 *
 * @see evas_key_modifier_add
 * @see evas_key_modifier_get
 * @see evas_key_modifier_on
 * @see evas_key_modifier_off
 * @see evas_key_modifier_is_set
 * @see evas_object_key_grab
 * @see evas_object_key_ungrab
 */
EAPI Evas_Modifier_Mask   evas_key_modifier_mask_get(const Evas *e, const char *keyname) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1, 2);

/**
 * Requests @p keyname key events be directed to @p obj.
 *
 * @param obj the object to direct @p keyname events to.
 * @param keyname the key to request events for.
 * @param modifiers a mask of modifiers that must be present to
 * trigger the event.
 * @param not_modifiers a mask of modifiers that must @b not be present
 * to trigger the event.
 * @param exclusive request that the @p obj is the only object
 * receiving the @p keyname events.
 * @return @c EINA_TRUE, if the call succeeded, @c EINA_FALSE otherwise.
 *
 * Key grabs allow one or more objects to receive key events for
 * specific key strokes even if other objects have focus. Whenever a
 * key is grabbed, only the objects grabbing it will get the events
 * for the given keys.
 *
 * @p keyname is a platform dependent symbolic name for the key
 * pressed (see @ref Evas_Keys for more information).
 *
 * @p modifiers and @p not_modifiers are bit masks of all the
 * modifiers that must and mustn't, respectively, be pressed along
 * with @p keyname key in order to trigger this new key
 * grab. Modifiers can be things such as Shift and Ctrl as well as
 * user defined types via evas_key_modifier_add(). Retrieve them with
 * evas_key_modifier_mask_get() or use @c 0 for empty masks.
 *
 * @p exclusive will make the given object the only one permitted to
 * grab the given key. If given @c EINA_TRUE, subsequent calls on this
 * function with different @p obj arguments will fail, unless the key
 * is ungrabbed again.
 *
 * Example code follows.
 * @dontinclude evas-events.c
 * @skip if (d.focus)
 * @until else
 *
 * See the full example @ref Example_Evas_Events "here".
 *
 * @warning Providing impossible modifier sets creates undefined behavior
 *
 * @see evas_object_key_ungrab
 * @see evas_object_focus_set
 * @see evas_object_focus_get
 * @see evas_focus_get
 * @see evas_key_modifier_add
 */
EAPI Eina_Bool            evas_object_key_grab(Evas_Object *obj, const char *keyname, Evas_Modifier_Mask modifiers, Evas_Modifier_Mask not_modifiers, Eina_Bool exclusive) EINA_WARN_UNUSED_RESULT EINA_ARG_NONNULL(1, 2);

/**
 * Removes the grab on @p keyname key events by @p obj.
 *
 * @param obj the object that has an existing key grab.
 * @param keyname the key the grab is set for.
 * @param modifiers a mask of modifiers that must be present to
 * trigger the event.
 * @param not_modifiers a mask of modifiers that must not not be
 * present to trigger the event.
 *
 * Removes a key grab on @p obj if @p keyname, @p modifiers, and @p
 * not_modifiers match.
 *
 * Example code follows.
 * @dontinclude evas-events.c
 * @skip got here by key grabs
 * @until }
 *
 * See the full example @ref Example_Evas_Events "here".
 *
 * @see evas_object_key_grab
 * @see evas_object_focus_set
 * @see evas_object_focus_get
 * @see evas_focus_get
 */
EAPI void                 evas_object_key_ungrab(Evas_Object *obj, const char *keyname, Evas_Modifier_Mask modifiers, Evas_Modifier_Mask not_modifiers) EINA_ARG_NONNULL(1, 2);
/**
 * @}
 */

/**
 * @ingroup Evas_Touch_Point_List
 *
 * @{
 */
/**
 * Get the number of touched point in the evas.
 *
 * @param e The pointer to the Evas canvas.
 * @return The number of touched point on the evas.
 *
 * New touched point is added to the list whenever touching the evas
 * and point is removed whenever removing touched point from the evas.
 *
 * Example:
 * @code
 * extern Evas *evas;
 * int count;
 *
 * count = evas_touch_point_list_count(evas);
 * printf("The count of touch points: %i\n", count);
 * @endcode
 *
 * @see evas_touch_point_list_nth_xy_get()
 * @see evas_touch_point_list_nth_id_get()
 * @see evas_touch_point_list_nth_state_get()
 */
EAPI unsigned int           evas_touch_point_list_count(Evas *e) EINA_ARG_NONNULL(1);

/**
 * This function returns the nth touch point's co-ordinates.
 *
 * @param e The pointer to the Evas canvas.
 * @param n The number of the touched point (0 being the first).
 * @param x The pointer to a Evas_Coord to be filled in.
 * @param y The pointer to a Evas_Coord to be filled in.
 *
 * Touch point's co-ordinates is updated whenever moving that point
 * on the canvas.
 *
 * Example:
 * @code
 * extern Evas *evas;
 * Evas_Coord x, y;
 *
 * if (evas_touch_point_list_count(evas))
 *   {
 *      evas_touch_point_nth_xy_get(evas, 0, &x, &y);
 *      printf("The first touch point's co-ordinate: (%i, %i)\n", x, y);
 *   }
 * @endcode
 *
 * @see evas_touch_point_list_count()
 * @see evas_touch_point_list_nth_id_get()
 * @see evas_touch_point_list_nth_state_get()
 */
EAPI void                   evas_touch_point_list_nth_xy_get(Evas *e, unsigned int n, Evas_Coord *x, Evas_Coord *y) EINA_ARG_NONNULL(1);

/**
 * This function returns the @p id of nth touch point.
 *
 * @param e The pointer to the Evas canvas.
 * @param n The number of the touched point (0 being the first).
 * @return id of nth touch point, if the call succeeded, -1 otherwise.
 *
 * The point which comes from Mouse Event has @p id 0 and The point
 * which comes from Multi Event has @p id that is same as Multi
 * Event's device id.
 *
 * Example:
 * @code
 * extern Evas *evas;
 * int id;
 *
 * if (evas_touch_point_list_count(evas))
 *   {
 *      id = evas_touch_point_nth_id_get(evas, 0);
 *      printf("The first touch point's id: %i\n", id);
 *   }
 * @endcode
 *
 * @see evas_touch_point_list_count()
 * @see evas_touch_point_list_nth_xy_get()
 * @see evas_touch_point_list_nth_state_get()
 */
EAPI int                    evas_touch_point_list_nth_id_get(Evas *e, unsigned int n) EINA_ARG_NONNULL(1);

/**
 * This function returns the @p state of nth touch point.
 *
 * @param e The pointer to the Evas canvas.
 * @param n The number of the touched point (0 being the first).
 * @return @p state of nth touch point, if the call succeeded,
 *         EVAS_TOUCH_POINT_CANCEL otherwise.
 *
 * The point's @p state is EVAS_TOUCH_POINT_DOWN when pressed,
 * EVAS_TOUCH_POINT_STILL when the point is not moved after pressed,
 * EVAS_TOUCH_POINT_MOVE when moved at least once after pressed and
 * EVAS_TOUCH_POINT_UP when released.
 *
 * Example:
 * @code
 * extern Evas *evas;
 * Evas_Touch_Point_State state;
 *
 * if (evas_touch_point_list_count(evas))
 *   {
 *      state = evas_touch_point_nth_state_get(evas, 0);
 *      printf("The first touch point's state: %i\n", state);
 *   }
 * @endcode
 *
 * @see evas_touch_point_list_count()
 * @see evas_touch_point_list_nth_xy_get()
 * @see evas_touch_point_list_nth_id_get()
 */
EAPI Evas_Touch_Point_State evas_touch_point_list_nth_state_get(Evas *e, unsigned int n) EINA_ARG_NONNULL(1);

/**
 * @}
 */

/**
 * @since 1.8
 *
 * Adds an output to the canvas
 * 
 * @parem e The canvas to add the output to
 * @return The output
 *
 * @see evas_out_engine_info_set
 * @see evas_output_viewport_set
 * @see evas_output_size_set
 */
EAPI Evas_Out *evas_out_add(Evas *e);

/**
 * @since 1.8
 *
 * Deletes an output
 * 
 * @parem evo The output object
 *
 * @see evas_out_add
 */
EAPI void evas_output_del(Evas_Out *evo);

/**
 * @since 1.8
 *
 * Sets the viewport region of the canvas that the output displays
 * 
 * This sets both the viewport region in the canvas that displays on the
 * given output, but also the viewport size will match the output
 * resolution 1:1.
 *
 * @parem evo The output object
 * @param x The X coordinate of the viewport
 * @param y The Y coordinate of the viewport
 * @param w The Width of the viewport
 * @param h The Height of the viewport
 *
 * @see evas_out_engine_info_set
 * @see evas_output_viewport_set
 * @see evas_output_size_set
 */
EAPI void evas_output_view_set(Evas_Out *evo, Evas_Coord x, Evas_Coord y, Evas_Coord w, Evas_Coord h);

/**
 * @since 1.8
 *
 * Gets the viewport region of the canvas that the output displays
 *
 * @parem evo The output object
 * @param x Pointer to X return value
 * @param y Pointer to Y return value
 * @param w Pointer to Width return value
 * @param h Pointer to Height return value
 *
 * @see evas_out_engine_info_get
 * @see evas_out_view_set
 * @see evas_output_viewport_get
 * @see evas_output_size_get
 */
EAPI void evas_output_view_get(const Evas_Out *evo, Evas_Coord *x, Evas_Coord *y, Evas_Coord *w, Evas_Coord *h);

/**
 * @since 1.8
 *
 * Sets the engine specific output parameters for a given output.
 *
 * @parem evo The output object
 * @param info The engine parameters
 * @return EINA_TRUE for success.
 *
 * @see evas_out_engine_info_get
 * @see evas_output_viewport_set
 * @see evas_output_size_set
 */
EAPI Eina_Bool evas_output_engine_info_set(Evas_Out *evo, Evas_Engine_Info *info);

/**
 * @since 1.8
 *
 * Gets the engine specific output parameters for a given output.
 *
 * @param evo The output object
 * @return info The engine parameters return (NULL on failure)
 *
 * @see evas_out_engine_info_set
 * @see evas_output_viewport_get
 * @see evas_output_size_get
 */
EAPI Evas_Engine_Info *evas_output_engine_info_get(const Evas_Out *evo);

/*
 * XXX: need output add/del events on evas
 * XXX: need output name/id, label, data
 */