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<h2><span class="refentrytitle"><a name="GocItem.top_of_page"></a>GocItem</span></h2>
<p>GocItem — Base canvas item.</p>
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<div class="refsynopsisdiv">
<a name="GocItem.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis"> <a class="link" href="GocItem.html#GocItem-struct" title="GocItem">GocItem</a>;
struct <a class="link" href="GocItem.html#GocItemClass" title="struct GocItemClass">GocItemClass</a>;
<span class="returnvalue">void</span> <a class="link" href="GocItem.html#goc-item-bounds-changed" title="goc_item_bounds_changed ()">goc_item_bounds_changed</a> (<em class="parameter"><code><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a> *item</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GocItem.html#goc-item-destroy" title="goc_item_destroy ()">goc_item_destroy</a> (<em class="parameter"><code><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a> *item</code></em>);
<span class="returnvalue">double</span> <a class="link" href="GocItem.html#goc-item-distance" title="goc_item_distance ()">goc_item_distance</a> (<em class="parameter"><code><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a> *item</code></em>,
<em class="parameter"><code><span class="type">double</span> x</code></em>,
<em class="parameter"><code><span class="type">double</span> y</code></em>,
<em class="parameter"><code><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a> **near_item</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GocItem.html#goc-item-draw" title="goc_item_draw ()">goc_item_draw</a> (<em class="parameter"><code><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a> const *item</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/cairo/cairo-cairo-t.html#cairo-t"><span class="type">cairo_t</span></a> *cr</code></em>);
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> <a class="link" href="GocItem.html#goc-item-draw-region" title="goc_item_draw_region ()">goc_item_draw_region</a> (<em class="parameter"><code><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a> const *item</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/cairo/cairo-cairo-t.html#cairo-t"><span class="type">cairo_t</span></a> *cr</code></em>,
<em class="parameter"><code><span class="type">double</span> x0</code></em>,
<em class="parameter"><code><span class="type">double</span> y0</code></em>,
<em class="parameter"><code><span class="type">double</span> x1</code></em>,
<em class="parameter"><code><span class="type">double</span> y1</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GocItem.html#goc-item-get-bounds" title="goc_item_get_bounds ()">goc_item_get_bounds</a> (<em class="parameter"><code><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a> const *item</code></em>,
<em class="parameter"><code><span class="type">double</span> *x0</code></em>,
<em class="parameter"><code><span class="type">double</span> *y0</code></em>,
<em class="parameter"><code><span class="type">double</span> *x1</code></em>,
<em class="parameter"><code><span class="type">double</span> *y1</code></em>);
<a href="/usr/share/gtk-doc/html/cairo/cairo-cairo-t.html#cairo-operator-t"><span class="returnvalue">cairo_operator_t</span></a> <a class="link" href="GocItem.html#goc-item-get-operator" title="goc_item_get_operator ()">goc_item_get_operator</a> (<em class="parameter"><code><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a> *item</code></em>);
<a class="link" href="GocGroup.html" title="GocGroup"><span class="returnvalue">GocGroup</span></a> * <a class="link" href="GocItem.html#goc-item-get-parent" title="goc_item_get_parent ()">goc_item_get_parent</a> (<em class="parameter"><code><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a> *item</code></em>);
<a href="/usr/share/gtk-doc/html/gtk3/GtkStyleContext.html"><span class="returnvalue">GtkStyleContext</span></a> * <a class="link" href="GocItem.html#goc-item-get-style-context" title="goc_item_get_style_context ()">goc_item_get_style_context</a> (<em class="parameter"><code>const <a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a> *item</code></em>);
<a href="/usr/share/gtk-doc/html/gdk3/gdk3-Windows.html#GdkWindow"><span class="returnvalue">GdkWindow</span></a> * <a class="link" href="GocItem.html#goc-item-get-window" title="goc_item_get_window ()">goc_item_get_window</a> (<em class="parameter"><code><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a> *item</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GocItem.html#goc-item-grab" title="goc_item_grab ()">goc_item_grab</a> (<em class="parameter"><code><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a> *item</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GocItem.html#goc-item-hide" title="goc_item_hide ()">goc_item_hide</a> (<em class="parameter"><code><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a> *item</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GocItem.html#goc-item-invalidate" title="goc_item_invalidate ()">goc_item_invalidate</a> (<em class="parameter"><code><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a> *item</code></em>);
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> <a class="link" href="GocItem.html#goc-item-is-visible" title="goc_item_is_visible ()">goc_item_is_visible</a> (<em class="parameter"><code><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a> *item</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GocItem.html#goc-item-lower" title="goc_item_lower ()">goc_item_lower</a> (<em class="parameter"><code><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a> *item</code></em>,
<em class="parameter"><code><span class="type">int</span> n</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GocItem.html#goc-item-lower-to-bottom" title="goc_item_lower_to_bottom ()">goc_item_lower_to_bottom</a> (<em class="parameter"><code><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a> *item</code></em>);
<a class="link" href="GocItem.html" title="GocItem"><span class="returnvalue">GocItem</span></a> * <a class="link" href="GocItem.html#goc-item-new" title="goc_item_new ()">goc_item_new</a> (<em class="parameter"><code><a class="link" href="GocGroup.html" title="GocGroup"><span class="type">GocGroup</span></a> *parent</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gobject/gobject-Type-Information.html#GType"><span class="type">GType</span></a> type</code></em>,
<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *first_arg_name</code></em>,
<em class="parameter"><code>...</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GocItem.html#goc-item-raise" title="goc_item_raise ()">goc_item_raise</a> (<em class="parameter"><code><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a> *item</code></em>,
<em class="parameter"><code><span class="type">int</span> n</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GocItem.html#goc-item-raise-to-top" title="goc_item_raise_to_top ()">goc_item_raise_to_top</a> (<em class="parameter"><code><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a> *item</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GocItem.html#goc-item-set" title="goc_item_set ()">goc_item_set</a> (<em class="parameter"><code><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a> *item</code></em>,
<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *first_arg_name</code></em>,
<em class="parameter"><code>...</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GocItem.html#goc-item-set-operator" title="goc_item_set_operator ()">goc_item_set_operator</a> (<em class="parameter"><code><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a> *item</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/cairo/cairo-cairo-t.html#cairo-operator-t"><span class="type">cairo_operator_t</span></a> op</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GocItem.html#goc-item-set-transform" title="goc_item_set_transform ()">goc_item_set_transform</a> (<em class="parameter"><code><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a> *item</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/cairo/cairo-cairo-matrix-t.html#cairo-matrix-t"><span class="type">cairo_matrix_t</span></a> *m</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GocItem.html#goc-item-set-visible" title="goc_item_set_visible ()">goc_item_set_visible</a> (<em class="parameter"><code><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a> *item</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> visible</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GocItem.html#goc-item-show" title="goc_item_show ()">goc_item_show</a> (<em class="parameter"><code><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a> *item</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GocItem.html#goc-item-ungrab" title="goc_item_ungrab ()">goc_item_ungrab</a> (<em class="parameter"><code><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a> *item</code></em>);
</pre>
</div>
<div class="refsect1">
<a name="GocItem.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="synopsis">
<a href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GObject">GObject</a>
+----GocItem
+----<a class="link" href="GocStyledItem.html" title="GocStyledItem">GocStyledItem</a>
+----GocComponent
+----<a class="link" href="GocGraph.html" title="GocGraph">GocGraph</a>
+----<a class="link" href="GocGroup.html" title="GocGroup">GocGroup</a>
+----GocImage
+----<a class="link" href="GocPixbuf.html" title="GocPixbuf">GocPixbuf</a>
+----<a class="link" href="GocWidget.html" title="GocWidget">GocWidget</a>
</pre>
</div>
<div class="refsect1">
<a name="GocItem.properties"></a><h2>Properties</h2>
<pre class="synopsis">
"<a class="link" href="GocItem.html#GocItem--canvas" title='The "canvas" property'>canvas</a>" <a class="link" href="GocCanvas.html" title="GocCanvas"><span class="type">GocCanvas</span></a>* : Read
"<a class="link" href="GocItem.html#GocItem--parent" title='The "parent" property'>parent</a>" <a class="link" href="GocGroup.html" title="GocGroup"><span class="type">GocGroup</span></a>* : Read
</pre>
</div>
<div class="refsect1">
<a name="GocItem.description"></a><h2>Description</h2>
<p>
<a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a> is the virtual base object for canvas items.
</p>
</div>
<div class="refsect1">
<a name="GocItem.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="GocItem-struct"></a><h3>GocItem</h3>
<pre class="programlisting">typedef struct _GocItem GocItem;</pre>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="GocItemClass"></a><h3>struct GocItemClass</h3>
<pre class="programlisting">struct GocItemClass {
GObjectClass base;
double (*distance) (GocItem *item,
double x, double y, GocItem **near_item);
void (*draw) (GocItem const *item, cairo_t *cr);
gboolean (*draw_region) (GocItem const *item, cairo_t *cr,
double x0, double y0, double x1, double y1);
void (*update_bounds) (GocItem *item);
/* events related functions */
gboolean (*button_pressed) (GocItem *item, int button, double x, double y);
gboolean (*button2_pressed) (GocItem *item, int button, double x, double y);
gboolean (*button_released) (GocItem *item, int button, double x, double y);
gboolean (*motion) (GocItem *item, double x, double y);
gboolean (*enter_notify) (GocItem *item, double x, double y);
gboolean (*leave_notify) (GocItem *item, double x, double y);
void (*realize) (GocItem *item);
void (*unrealize) (GocItem *item);
void (*notify_scrolled) (GocItem *item);
#ifdef GOFFICE_WITH_GTK
gboolean (*key_pressed) (GocItem *item, GdkEventKey* ev);
gboolean (*key_released) (GocItem *item, GdkEventKey* ev);
GdkWindow* (*get_window) (GocItem *item);
#endif
};
</pre>
<p>
The base class for all canvas items.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><a href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GObjectClass"><span class="type">GObjectClass</span></a> <em class="structfield"><code><a name="GocItemClass.base"></a>base</code></em>;</span></p></td>
<td>the parent class</td>
</tr>
<tr>
<td><p><span class="term"><em class="structfield"><code><a name="GocItemClass.distance"></a>distance</code></em> ()</span></p></td>
<td>returns the distance between the item and the point defined by
<em class="parameter"><code>x</code></em> and <em class="parameter"><code>y</code></em>. When the distance is larger than a few pixels, the result is not
relevant, so an approximate value or even G_MAXDOUBLE might be returned.</td>
</tr>
<tr>
<td><p><span class="term"><em class="structfield"><code><a name="GocItemClass.draw"></a>draw</code></em> ()</span></p></td>
<td>draws the item to the cairo context.</td>
</tr>
<tr>
<td><p><span class="term"><em class="structfield"><code><a name="GocItemClass.draw-region"></a>draw_region</code></em> ()</span></p></td>
<td>draws the item in the region defined by <em class="parameter"><code>x0</code></em>, <em class="parameter"><code>y0</code></em>, <em class="parameter"><code>x1</code></em> and <em class="parameter"><code>y1</code></em>.
Should return TRUE when successfull. If FALSE is returned, <em class="parameter"><code>draw</code></em> will be
called. There is no need to implement both methods for an item. Large items
should implement <em class="parameter"><code>draw_region</code></em>.</td>
</tr>
<tr>
<td><p><span class="term"><em class="structfield"><code><a name="GocItemClass.update-bounds"></a>update_bounds</code></em> ()</span></p></td>
<td>updates the bounds stored in <a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a> as fields <span class="type">x0</span>, <span class="type">y0</span>,
<span class="type">x1</span>,and <span class="type">y1</span>.</td>
</tr>
<tr>
<td><p><span class="term"><em class="structfield"><code><a name="GocItemClass.button-pressed"></a>button_pressed</code></em> ()</span></p></td>
<td>callback for a button press event.</td>
</tr>
<tr>
<td><p><span class="term"><em class="structfield"><code><a name="GocItemClass.button2-pressed"></a>button2_pressed</code></em> ()</span></p></td>
<td>callback for a double click event.</td>
</tr>
<tr>
<td><p><span class="term"><em class="structfield"><code><a name="GocItemClass.button-released"></a>button_released</code></em> ()</span></p></td>
<td>callback for a button release event.</td>
</tr>
<tr>
<td><p><span class="term"><em class="structfield"><code><a name="GocItemClass.motion"></a>motion</code></em> ()</span></p></td>
<td>callback for a motion event.</td>
</tr>
<tr>
<td><p><span class="term"><em class="structfield"><code><a name="GocItemClass.enter-notify"></a>enter_notify</code></em> ()</span></p></td>
<td>callback for an enter notify event.</td>
</tr>
<tr>
<td><p><span class="term"><em class="structfield"><code><a name="GocItemClass.leave-notify"></a>leave_notify</code></em> ()</span></p></td>
<td>callback for a leave notify event.</td>
</tr>
<tr>
<td><p><span class="term"><em class="structfield"><code><a name="GocItemClass.realize"></a>realize</code></em> ()</span></p></td>
<td>callback for a realizes event.</td>
</tr>
<tr>
<td><p><span class="term"><em class="structfield"><code><a name="GocItemClass.unrealize"></a>unrealize</code></em> ()</span></p></td>
<td>callback for an unrealize event.</td>
</tr>
<tr>
<td><p><span class="term"><em class="structfield"><code><a name="GocItemClass.notify-scrolled"></a>notify_scrolled</code></em> ()</span></p></td>
<td>callback for a notify scrolled event. This is useful to
reposition children of the GtkLayout parent of the canvas to their new
position.</td>
</tr>
<tr>
<td><p><span class="term"><em class="structfield"><code><a name="GocItemClass.key-pressed"></a>key_pressed</code></em> ()</span></p></td>
<td>callback for a key press event.</td>
</tr>
<tr>
<td><p><span class="term"><em class="structfield"><code><a name="GocItemClass.key-released"></a>key_released</code></em> ()</span></p></td>
<td>callback for a key release event.</td>
</tr>
<tr>
<td><p><span class="term"><em class="structfield"><code><a name="GocItemClass.get-window"></a>get_window</code></em> ()</span></p></td>
<td>returns the<a href="/usr/share/gtk-doc/html/gdk3/gdk3-Windows.html#GdkWindow"><span class="type">GdkWindow</span></a> for the item if any.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="goc-item-bounds-changed"></a><h3>goc_item_bounds_changed ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> goc_item_bounds_changed (<em class="parameter"><code><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a> *item</code></em>);</pre>
<p>
This function needs to be called each time the bounds of <em class="parameter"><code>item</code></em> change. It
is normally called from inside the implementation of items derived classes.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>item</code></em> :</span></p></td>
<td><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a></td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="goc-item-destroy"></a><h3>goc_item_destroy ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> goc_item_destroy (<em class="parameter"><code><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a> *item</code></em>);</pre>
<p>
Destroys <em class="parameter"><code>item</code></em>, removes it from its parent group and updates the canvas
accordingly.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>item</code></em> :</span></p></td>
<td><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a></td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="goc-item-distance"></a><h3>goc_item_distance ()</h3>
<pre class="programlisting"><span class="returnvalue">double</span> goc_item_distance (<em class="parameter"><code><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a> *item</code></em>,
<em class="parameter"><code><span class="type">double</span> x</code></em>,
<em class="parameter"><code><span class="type">double</span> y</code></em>,
<em class="parameter"><code><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a> **near_item</code></em>);</pre>
<p>
Evaluates the distance between the point with canvas coordinates <em class="parameter"><code>x</code></em>,<em class="parameter"><code>y</code></em>
and the nearest point of <em class="parameter"><code>item</code></em>. <em class="parameter"><code>near_item</code></em> is set with either <em class="parameter"><code>item</code></em> or
its appropriate child.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>item</code></em> :</span></p></td>
<td><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a></td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>x</code></em> :</span></p></td>
<td>horizontal position</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>y</code></em> :</span></p></td>
<td>vertical position</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>near_item</code></em> :</span></p></td>
<td>where to store the nearest item</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the evaluated distance.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="goc-item-draw"></a><h3>goc_item_draw ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> goc_item_draw (<em class="parameter"><code><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a> const *item</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/cairo/cairo-cairo-t.html#cairo-t"><span class="type">cairo_t</span></a> *cr</code></em>);</pre>
<p>
Renders <em class="parameter"><code>item</code></em> using <em class="parameter"><code>cr</code></em>. There is no need to call this function directly.
Invalidating the item is the way to go.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>item</code></em> :</span></p></td>
<td><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a></td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>cr</code></em> :</span></p></td>
<td><a href="/usr/share/gtk-doc/html/cairo/cairo-cairo-t.html#cairo-t"><span class="type">cairo_t</span></a></td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="goc-item-draw-region"></a><h3>goc_item_draw_region ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> goc_item_draw_region (<em class="parameter"><code><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a> const *item</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/cairo/cairo-cairo-t.html#cairo-t"><span class="type">cairo_t</span></a> *cr</code></em>,
<em class="parameter"><code><span class="type">double</span> x0</code></em>,
<em class="parameter"><code><span class="type">double</span> y0</code></em>,
<em class="parameter"><code><span class="type">double</span> x1</code></em>,
<em class="parameter"><code><span class="type">double</span> y1</code></em>);</pre>
<p>
Renders <em class="parameter"><code>item</code></em> using <em class="parameter"><code>cr</code></em>, limiting all drawings to the region limited by
<em class="parameter"><code>x0</code></em>, <em class="parameter"><code>y0</code></em>, <em class="parameter"><code>x1</code></em>, and <em class="parameter"><code>y1</code></em>. If this function returns <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a>, <a class="link" href="GocItem.html#goc-item-draw" title="goc_item_draw ()"><span class="type">goc_item_draw</span></a>
should be called. There is no need to call this function directly.
Invalidating the item is the way to go.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>item</code></em> :</span></p></td>
<td><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a></td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>cr</code></em> :</span></p></td>
<td><a href="/usr/share/gtk-doc/html/cairo/cairo-cairo-t.html#cairo-t"><span class="type">cairo_t</span></a></td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>x0</code></em> :</span></p></td>
<td>the lowest horizontal bound of the region to draw</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>y0</code></em> :</span></p></td>
<td>the lowest vertical bound of the region to draw</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>x1</code></em> :</span></p></td>
<td>the highest horizontal bound of the region to draw</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>y1</code></em> :</span></p></td>
<td>the highest vertical bound of the region to draw</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if successful.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="goc-item-get-bounds"></a><h3>goc_item_get_bounds ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> goc_item_get_bounds (<em class="parameter"><code><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a> const *item</code></em>,
<em class="parameter"><code><span class="type">double</span> *x0</code></em>,
<em class="parameter"><code><span class="type">double</span> *y0</code></em>,
<em class="parameter"><code><span class="type">double</span> *x1</code></em>,
<em class="parameter"><code><span class="type">double</span> *y1</code></em>);</pre>
<p>
Retrieves the bounds of <em class="parameter"><code>item</code></em> in canvas coordinates.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>item</code></em> :</span></p></td>
<td><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a></td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>x0</code></em> :</span></p></td>
<td>where to store the lowest horizontal bound</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>y0</code></em> :</span></p></td>
<td>where to store the lowest vertical bound</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>x1</code></em> :</span></p></td>
<td>where to store the highest horizontal bound</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>y1</code></em> :</span></p></td>
<td>where to store the highest vertical bound</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="goc-item-get-operator"></a><h3>goc_item_get_operator ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/cairo/cairo-cairo-t.html#cairo-operator-t"><span class="returnvalue">cairo_operator_t</span></a> goc_item_get_operator (<em class="parameter"><code><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a> *item</code></em>);</pre>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>item</code></em> :</span></p></td>
<td><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a></td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the operator used when drawing the item.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="goc-item-get-parent"></a><h3>goc_item_get_parent ()</h3>
<pre class="programlisting"><a class="link" href="GocGroup.html" title="GocGroup"><span class="returnvalue">GocGroup</span></a> * goc_item_get_parent (<em class="parameter"><code><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a> *item</code></em>);</pre>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>item</code></em> :</span></p></td>
<td><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a></td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The item parent <a class="link" href="GocGroup.html" title="GocGroup"><span class="type">GocGroup</span></a>. <span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="goc-item-get-style-context"></a><h3>goc_item_get_style_context ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/gtk3/GtkStyleContext.html"><span class="returnvalue">GtkStyleContext</span></a> * goc_item_get_style_context (<em class="parameter"><code>const <a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a> *item</code></em>);</pre>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>item</code></em> :</span></p></td>
<td><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a></td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The style context to use for the item. <span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="goc-item-get-window"></a><h3>goc_item_get_window ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/gdk3/gdk3-Windows.html#GdkWindow"><span class="returnvalue">GdkWindow</span></a> * goc_item_get_window (<em class="parameter"><code><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a> *item</code></em>);</pre>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>item</code></em> :</span></p></td>
<td><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a></td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The <a href="/usr/share/gtk-doc/html/gdk3/gdk3-Windows.html#GdkWindow"><span class="type">GdkWindow</span></a> associated with the item if any or
NULL. Only <a class="link" href="GocWidget.html" title="GocWidget"><span class="type">GocWidget</span></a> owns a <a href="/usr/share/gtk-doc/html/gdk3/gdk3-Windows.html#GdkWindow"><span class="type">GdkWindow</span></a>. <span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="goc-item-grab"></a><h3>goc_item_grab ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> goc_item_grab (<em class="parameter"><code><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a> *item</code></em>);</pre>
<p>
Grabs the item. This function will fail if another item is grabbed.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>item</code></em> :</span></p></td>
<td><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a></td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="goc-item-hide"></a><h3>goc_item_hide ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> goc_item_hide (<em class="parameter"><code><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a> *item</code></em>);</pre>
<p>
Hides <em class="parameter"><code>item</code></em>.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>item</code></em> :</span></p></td>
<td><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a></td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="goc-item-invalidate"></a><h3>goc_item_invalidate ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> goc_item_invalidate (<em class="parameter"><code><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a> *item</code></em>);</pre>
<p>
Force a redraw of <em class="parameter"><code>item</code></em> bounding region.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>item</code></em> :</span></p></td>
<td><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a></td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="goc-item-is-visible"></a><h3>goc_item_is_visible ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> goc_item_is_visible (<em class="parameter"><code><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a> *item</code></em>);</pre>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>item</code></em> :</span></p></td>
<td><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a></td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if <em class="parameter"><code>item</code></em> is visible.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="goc-item-lower"></a><h3>goc_item_lower ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> goc_item_lower (<em class="parameter"><code><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a> *item</code></em>,
<em class="parameter"><code><span class="type">int</span> n</code></em>);</pre>
<p>
Lowers <em class="parameter"><code>item</code></em> by <em class="parameter"><code>n</code></em> steps inside its parent <a class="link" href="GocGroup.html" title="GocGroup"><span class="type">GocGroup</span></a> (or less if the list
is too short) in the item list so that it is displayed more deeply in the
items stack.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>item</code></em> :</span></p></td>
<td><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a></td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>n</code></em> :</span></p></td>
<td>the rank change</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="goc-item-lower-to-bottom"></a><h3>goc_item_lower_to_bottom ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> goc_item_lower_to_bottom (<em class="parameter"><code><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a> *item</code></em>);</pre>
<p>
Lowers <em class="parameter"><code>item</code></em> to bottom inside its parent <a class="link" href="GocGroup.html" title="GocGroup"><span class="type">GocGroup</span></a> so that it will be at
least partly hidden by any overlapping item.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>item</code></em> :</span></p></td>
<td><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a></td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="goc-item-new"></a><h3>goc_item_new ()</h3>
<pre class="programlisting"><a class="link" href="GocItem.html" title="GocItem"><span class="returnvalue">GocItem</span></a> * goc_item_new (<em class="parameter"><code><a class="link" href="GocGroup.html" title="GocGroup"><span class="type">GocGroup</span></a> *parent</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gobject/gobject-Type-Information.html#GType"><span class="type">GType</span></a> type</code></em>,
<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *first_arg_name</code></em>,
<em class="parameter"><code>...</code></em>);</pre>
<p>
Creates a new item of type <em class="parameter"><code>type</code></em> in group <em class="parameter"><code>group</code></em>. Properties can be
set just the same way they are in <a href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#g-object-new"><span class="type">g_object_new</span></a>.
</p>
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<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>parent</code></em> :</span></p></td>
<td>parent <a class="link" href="GocGroup.html" title="GocGroup"><span class="type">GocGroup</span></a> for the new item</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>type</code></em> :</span></p></td>
<td>
<a href="/usr/share/gtk-doc/html/gobject/gobject-Type-Information.html#GType"><span class="type">GType</span></a> of the new item</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>first_arg_name</code></em> :</span></p></td>
<td>property name or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>...</code></em> :</span></p></td>
<td>value for the first property, followed optionally by more
name/value pairs, followed by <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the newly created <a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a>. <span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="goc-item-raise"></a><h3>goc_item_raise ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> goc_item_raise (<em class="parameter"><code><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a> *item</code></em>,
<em class="parameter"><code><span class="type">int</span> n</code></em>);</pre>
<p>
Raises <em class="parameter"><code>item</code></em> by <em class="parameter"><code>n</code></em> steps inside its parent <a class="link" href="GocGroup.html" title="GocGroup"><span class="type">GocGroup</span></a> (or less if the list
is too short) in the item list so that it is displayed nearer the top of
the items stack.
</p>
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<colgroup>
<col align="left" valign="top">
<col>
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<td><p><span class="term"><em class="parameter"><code>item</code></em> :</span></p></td>
<td><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a></td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>n</code></em> :</span></p></td>
<td>the rank change</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="goc-item-raise-to-top"></a><h3>goc_item_raise_to_top ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> goc_item_raise_to_top (<em class="parameter"><code><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a> *item</code></em>);</pre>
<p>
Raises <em class="parameter"><code>item</code></em> to front so that it becomes the toplevel item inside
its parent <a class="link" href="GocGroup.html" title="GocGroup"><span class="type">GocGroup</span></a>.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>item</code></em> :</span></p></td>
<td><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a></td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="goc-item-set"></a><h3>goc_item_set ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> goc_item_set (<em class="parameter"><code><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a> *item</code></em>,
<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *first_arg_name</code></em>,
<em class="parameter"><code>...</code></em>);</pre>
<p>
Set properties and updates the canvas. Using <a href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#g-object-set"><span class="type">g_object_set</span></a> instead would
set the properties, but not update the canvas.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
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<td><p><span class="term"><em class="parameter"><code>item</code></em> :</span></p></td>
<td><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a></td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>first_arg_name</code></em> :</span></p></td>
<td>property name or <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>...</code></em> :</span></p></td>
<td>value for the first property, followed optionally by more
name/value pairs, followed by <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="goc-item-set-operator"></a><h3>goc_item_set_operator ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> goc_item_set_operator (<em class="parameter"><code><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a> *item</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/cairo/cairo-cairo-t.html#cairo-operator-t"><span class="type">cairo_operator_t</span></a> op</code></em>);</pre>
<p>
Set the operator used when drawing the item.
</p>
<div class="variablelist"><table border="0" class="variablelist">
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<col align="left" valign="top">
<col>
</colgroup>
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<tr>
<td><p><span class="term"><em class="parameter"><code>item</code></em> :</span></p></td>
<td><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a></td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>op</code></em> :</span></p></td>
<td><a href="/usr/share/gtk-doc/html/cairo/cairo-cairo-t.html#cairo-operator-t"><span class="type">cairo_operator_t</span></a></td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="goc-item-set-transform"></a><h3>goc_item_set_transform ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> goc_item_set_transform (<em class="parameter"><code><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a> *item</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/cairo/cairo-cairo-matrix-t.html#cairo-matrix-t"><span class="type">cairo_matrix_t</span></a> *m</code></em>);</pre>
<p>
Set the matrix used to transform the item.
</p>
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<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
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<td><p><span class="term"><em class="parameter"><code>item</code></em> :</span></p></td>
<td><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a></td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>m</code></em> :</span></p></td>
<td><a href="/usr/share/gtk-doc/html/cairo/cairo-cairo-matrix-t.html#cairo-matrix-t"><span class="type">cairo_matrix_t</span></a></td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="goc-item-set-visible"></a><h3>goc_item_set_visible ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> goc_item_set_visible (<em class="parameter"><code><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a> *item</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> visible</code></em>);</pre>
<p>
Either hides or shows <em class="parameter"><code>item</code></em> as appropriate..
</p>
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<col align="left" valign="top">
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<td><p><span class="term"><em class="parameter"><code>item</code></em> :</span></p></td>
<td><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a></td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>visible</code></em> :</span></p></td>
<td>whether the item should be visible</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="goc-item-show"></a><h3>goc_item_show ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> goc_item_show (<em class="parameter"><code><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a> *item</code></em>);</pre>
<p>
Makes <em class="parameter"><code>item</code></em> visible.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
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<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>item</code></em> :</span></p></td>
<td><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a></td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="goc-item-ungrab"></a><h3>goc_item_ungrab ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> goc_item_ungrab (<em class="parameter"><code><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a> *item</code></em>);</pre>
<p>
Ungrabs the item. This function will fail if <em class="parameter"><code>item</code></em> is not grabbed.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>item</code></em> :</span></p></td>
<td><a class="link" href="GocItem.html" title="GocItem"><span class="type">GocItem</span></a></td>
</tr></tbody>
</table></div>
</div>
</div>
<div class="refsect1">
<a name="GocItem.property-details"></a><h2>Property Details</h2>
<div class="refsect2">
<a name="GocItem--canvas"></a><h3>The <code class="literal">"canvas"</code> property</h3>
<pre class="programlisting"> "canvas" <a class="link" href="GocCanvas.html" title="GocCanvas"><span class="type">GocCanvas</span></a>* : Read</pre>
<p>The canvas object on which the item resides.</p>
</div>
<hr>
<div class="refsect2">
<a name="GocItem--parent"></a><h3>The <code class="literal">"parent"</code> property</h3>
<pre class="programlisting"> "parent" <a class="link" href="GocGroup.html" title="GocGroup"><span class="type">GocGroup</span></a>* : Read</pre>
<p>The group in which the item resides.</p>
</div>
</div>
</div>
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