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<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><title>goocanvas.Canvas</title><link rel="stylesheet" type="text/css" href="style.css"><meta name="generator" content="DocBook XSL Stylesheets V1.76.1"><link rel="home" href="index.html" title="PyGooCanvas Reference Manual"><link rel="up" href="pygoocanvas-core-classes.html" title="PyGooCanvas Core Class Reference"><link rel="prev" href="pygoocanvas-core-classes.html" title="PyGooCanvas Core Class Reference"><link rel="next" href="class-canvas-item.html" title="goocanvas.Item"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">goocanvas.Canvas</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="pygoocanvas-core-classes.html">Prev</a> </td><th width="60%" align="center">PyGooCanvas Core Class Reference</th><td width="20%" align="right"> <a accesskey="n" href="class-canvas-item.html">Next</a></td></tr></table><hr></div><div class="refentry" title="goocanvas.Canvas"><a name="class-canvas"></a><div class="titlepage"></div><div class="refnamediv"><h2>goocanvas.Canvas</h2><p>goocanvas.Canvas — The Canvas</p></div><div class="refsect1" title="Synopsis"><a name="idp168512"></a><h2>Synopsis</h2><table bgcolor="#D0E0F0" width="100%"><tr><td><pre class="classsynopsis">class <span class="ooclass"><span class="classname">goocanvas.Canvas</span></span>(<span class="ooclass"><span class="classname">gtk.Container</span></span>):
<code class="constructorsynopsis">    <span class="methodname">goocanvas.Canvas</span>(<span class="methodparam"></span>)</code><br><code class="methodsynopsis">    def <span class="methodname">convert_bounds_to_item_space</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>item</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>bounds</code></strong></span></span>)</code><br><code class="methodsynopsis">    def <span class="methodname">convert_from_item_space</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>item</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>x</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>y</code></strong></span></span>)</code><br><code class="methodsynopsis">    def <span class="methodname">convert_to_item_space</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>item</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>x</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>y</code></strong></span></span>)</code><br><code class="methodsynopsis">    def <span class="methodname">convert_from_pixel</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>x</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>y</code></strong></span></span>)</code><br><code class="methodsynopsis">    def <span class="methodname">convert_to_pixel</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>x</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>y</code></strong></span></span>)</code><br><code class="methodsynopsis">    def <span class="methodname">create_cairo_context</span>(<span class="methodparam"></span>)</code><br><code class="methodsynopsis">    def <span class="methodname">create_item</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>model</code></strong></span></span>)</code><br><code class="methodsynopsis">    def <span class="methodname">get_bounds</span>(<span class="methodparam"></span>)</code><br><code class="methodsynopsis">    def <span class="methodname">get_default_line_width</span>(<span class="methodparam"></span>)</code><br><code class="methodsynopsis">    def <span class="methodname">get_item</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>model</code></strong></span></span>)</code><br><code class="methodsynopsis">    def <span class="methodname">get_item_at</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>x</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>y</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>is_pointer_event</code></strong></span></span>)</code><br><code class="methodsynopsis">    def <span class="methodname">get_items_at</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>x</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>y</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>is_pointer_event</code></strong></span></span>)</code><br><code class="methodsynopsis">    def <span class="methodname">get_items_in_area</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>area</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>inside_area</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>allow_overlaps</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>including_containers</code></strong></span></span>)</code><br><code class="methodsynopsis">    def <span class="methodname">get_root_item</span>(<span class="methodparam"></span>)</code><br><code class="methodsynopsis">    def <span class="methodname">get_root_item_model</span>(<span class="methodparam"></span>)</code><br><code class="methodsynopsis">    def <span class="methodname">get_scale</span>(<span class="methodparam"></span>)</code><br><code class="methodsynopsis">    def <span class="methodname">get_static_root_item</span>(<span class="methodparam"></span>)</code><br><code class="methodsynopsis">    def <span class="methodname">get_static_root_item_model</span>(<span class="methodparam"></span>)</code><br><code class="methodsynopsis">    def <span class="methodname">grab_focus</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>item</code></strong></span></span>)</code><br><code class="methodsynopsis">    def <span class="methodname">keyboard_grab</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>item</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>owner_events</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>time</code></strong></span></span>)</code><br><code class="methodsynopsis">    def <span class="methodname">keyboard_ungrab</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>item</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>time</code></strong></span></span>)</code><br><code class="methodsynopsis">    def <span class="methodname">pointer_grab</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>item</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>event_mask</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>cursor</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>time</code></strong></span></span>)</code><br><code class="methodsynopsis">    def <span class="methodname">pointer_ungrab</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>item</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>time</code></strong></span></span>)</code><br><code class="methodsynopsis">    def <span class="methodname">register_widget_item</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>witem</code></strong></span></span>)</code><br><code class="methodsynopsis">    def <span class="methodname">render</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>cr</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>bounds</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>scale</code></strong></span></span>)</code><br><code class="methodsynopsis">    def <span class="methodname">request_item_redraw</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>bounds</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>is_static</code></strong></span></span>)</code><br><code class="methodsynopsis">    def <span class="methodname">request_redraw</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>bounds</code></strong></span></span>)</code><br><code class="methodsynopsis">    def <span class="methodname">request_update</span>(<span class="methodparam"></span>)</code><br><code class="methodsynopsis">    def <span class="methodname">scroll_to</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>left</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>top</code></strong></span></span>)</code><br><code class="methodsynopsis">    def <span class="methodname">set_bounds</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>left</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>top</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>right</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>bottom</code></strong></span></span>)</code><br><code class="methodsynopsis">    def <span class="methodname">set_root_item</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>item</code></strong></span></span>)</code><br><code class="methodsynopsis">    def <span class="methodname">set_root_item_model</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>model</code></strong></span></span>)</code><br><code class="methodsynopsis">    def <span class="methodname">set_scale</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>scale</code></strong></span></span>)</code><br><code class="methodsynopsis">    def <span class="methodname">set_static_root_item</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>item</code></strong></span></span>)</code><br><code class="methodsynopsis">    def <span class="methodname">set_static_root_item_model</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>model</code></strong></span></span>)</code><br><code class="methodsynopsis">    def <span class="methodname">unregister_item</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>model</code></strong></span></span>)</code><br><code class="methodsynopsis">    def <span class="methodname">unregister_widget_item</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>witem</code></strong></span></span>)</code><br><code class="methodsynopsis">    def <span class="methodname">update</span>(<span class="methodparam"></span>)</code><br></pre></td></tr></table></div><div class="refsect1" title="Ancestry"><a name="idp2579280"></a><h2>Ancestry</h2><pre class="synopsis">+-- <a
href="../pygobject/class-gobject.html"
>gobject.GObject</a>
	+-- gtk.Object
		+-- gtk.Widget
			+-- gtk.Container
				+-- goocanvas.Canvas
</pre></div><div class="refsect1" title="goocanvas.Canvas Properties"><a name="properties-goocanvas"></a><h2>goocanvas.Canvas Properties</h2><p>gtk.Object Properties</p><p>gtk.Widget Properties</p><p>gtk.Container Properties</p><div class="blockquote"><table width="100%" border="0" bgcolor="#E0E0E0"><tr><td valign="top"><div class="informaltable"><table width="100%" border="0"><colgroup><col width="1in"><col width="1in"><col width="3.5in"></colgroup><tbody><tr valign="top"><td valign="top">"anchor"</td><td valign="top">Read/Write</td><td valign="top">Where to place the canvas when it is smaller than the widget's allocated area.
                                         Default value: gtk.ANCHOR_NORTH_WEST</td></tr><tr valign="top"><td valign="top">"automatic-bounds"</td><td valign="top">Read/Write</td><td valign="top">If the bounds are automatically calculated based
                                    on the bounds of all the items in the canvas.</td></tr><tr valign="top"><td valign="top">"bounds-from-origin"</td><td valign="top">Read/Write</td><td valign="top">If the automatic bounds are calculated from the origin.</td></tr><tr valign="top"><td valign="top">"bounds-padding"</td><td valign="top">Read/Write</td><td valign="top">The padding added to the automatic bounds.</td></tr><tr valign="top"><td valign="top">"clear-background"</td><td valign="top">Read/Write</td><td valign="top">If the background is cleared before the canvas is painted.
                            Default value: <code class="literal">True</code></td></tr><tr valign="top"><td valign="top">"integer-layout"</td><td valign="top">Read/Write</td><td valign="top">If all item layout is done to the nearest integer.</td></tr><tr valign="top"><td valign="top">"redraw-when-scrolled"</td><td valign="top">Read/Write</td><td valign="top">If the canvas is completely redrawn when scrolled, to
                            reduce the flicker of static items.
                            Default value: <code class="literal">False</code>.</td></tr><tr valign="top"><td valign="top">"resolution-x"</td><td valign="top">Read/Write</td><td valign="top">The horizontal resolution of the display, in dots per inch. Allowed values: &gt;= 0
                                         Default value: 96</td></tr><tr valign="top"><td valign="top">"resolution-y"</td><td valign="top">Read/Write</td><td valign="top">The vertical resolution of the display, in dots per inch. Allowed values: &gt;= 0
                                         Default value: 96</td></tr><tr valign="top"><td valign="top">"scale"</td><td valign="top">Read/Write</td><td valign="top">The number of pixels to use for each device unit. Allowed values: &gt;= 0
                                         Default value: 1</td></tr><tr valign="top"><td valign="top">"scale-x"</td><td valign="top">Read/Write</td><td valign="top">The horizontal magnification factor of the canvas.</td></tr><tr valign="top"><td valign="top">"scale-y"</td><td valign="top">Read/Write</td><td valign="top">The vertical magnification factor of the canvas.</td></tr><tr valign="top"><td valign="top">"x1"</td><td valign="top">Read/Write</td><td valign="top">The x coordinate of the left edge of the canvas bounds, in device units.
                                         Default value: 0.</td></tr><tr valign="top"><td valign="top">"x2"</td><td valign="top">Read/Write</td><td valign="top">The x coordinate of the right edge of the canvas bounds, in device units.
                                         Default value: 1000.</td></tr><tr valign="top"><td valign="top">"y1"</td><td valign="top">Read/Write</td><td valign="top">The y coordinate at the top edge of the canvas bounds, in device units.
                                         Default value: 0.</td></tr><tr valign="top"><td valign="top">"y2"</td><td valign="top">Read/Write</td><td valign="top">The y coordinate at the bottom edge of the canvas bounds, in device units.
                                         Default value: 1000.</td></tr></tbody></table></div></td></tr></table></div></div><div class="refsect1" title="goocanvas.Canvas Signal Prototypes"><a name="signal-prototypes-goocanvas"></a><h2>goocanvas.Canvas Signal Prototypes</h2><table border="0" width="100%" bgcolor="#FFECCE"><col align="left" valign="top" width="0*"><tbody><tr><td><p><span class="term">"item-created"</span></p></td><td><code class="methodsynopsis">    def <span class="methodname">callback</span>(<span class="methodparam"><span class="parameter"><em class="parameter"><code>canvas</code></em></span></span>, <span class="methodparam"><span class="parameter"><em class="parameter"><code>item</code></em></span></span>, <span class="methodparam"><span class="parameter"><em class="parameter"><code>model</code></em></span></span>, <span class="methodparam"><span class="parameter"><em class="parameter"><code>user_param</code></em></span></span>, <span class="methodparam"><span class="parameter"><em class="parameter"><code>...</code></em></span></span>)</code></td></tr><tr><td><p><span class="term">"set-scroll-adjustments"</span></p></td><td><code class="methodsynopsis">    def <span class="methodname">callback</span>(<span class="methodparam"><span class="parameter"><em class="parameter"><code>canvas_view</code></em></span></span>, <span class="methodparam"><span class="parameter"><em class="parameter"><code>hadjustment</code></em></span></span>, <span class="methodparam"><span class="parameter"><em class="parameter"><code>vadjustment</code></em></span></span>, <span class="methodparam"><span class="parameter"><em class="parameter"><code>user_param</code></em></span></span>, <span class="methodparam"><span class="parameter"><em class="parameter"><code>...</code></em></span></span>)</code></td></tr></tbody></table></div><div class="refsect1" title="Description"><a name="idp1404464"></a><h2>Description</h2><p>
                <code class="classname">goocanvas.Canvas</code>
                is the main widget containing a number of canvas items.
            </p></div><div class="refsect1" title="Constructor"><a name="constructor-canvas"></a><h2>Constructor</h2><pre class="programlisting"><code class="constructorsynopsis">    <span class="methodname">goocanvas.Canvas</span>()</code></pre><table border="0" width="100%" bgcolor="#FFECCE"><col align="left" valign="top" width="0*"><tbody><tr><td><p><span class="term"><span class="emphasis"><em>Returns</em></span>:</span></p></td><td>A new
					    <code class="classname">goocanvas.Canvas</code>
				    </td></tr></tbody></table><p>
		    Creates a new canvas.
	    </p></div><div class="refsect1" title="Methods"><a name="idp1412736"></a><h2>Methods</h2><div class="refsect2" title="goocanvas.Canvas.convert_bounds_to_item_space"><a name="method-goocanvas--convert-bounds-to-item-space"></a><h3>goocanvas.Canvas.convert_bounds_to_item_space</h3><pre class="programlisting"><code class="methodsynopsis">    def <span class="methodname">convert_bounds_to_item_space</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>item</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>bounds</code></strong></span></span>)</code></pre><table border="0" width="100%" bgcolor="#FFECCE"><col align="left" valign="top" width="0*"><tbody><tr><td><p><span class="term"><strong class="parameter"><code>item</code></strong>:</span></p></td><td>A goocanvas.Item
                            </td></tr><tr><td><p><span class="term"><strong class="parameter"><code>bounds</code></strong>:</span></p></td><td>the bounds in device space.</td></tr></tbody></table><p>
                Converts the bound in device space to a bounding box in item space.
                This is useful in the item paint() methods to convert the bounds to
                be painted to the item's coordinate space.
            </p></div><div class="refsect2" title="goocanvas.Canvas.convert_from_item_space"><a name="method-goocanvas--convert-from-item-space"></a><h3>goocanvas.Canvas.convert_from_item_space</h3><pre class="programlisting"><code class="methodsynopsis">    def <span class="methodname">convert_from_item_space</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>item</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>x</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>y</code></strong></span></span>)</code></pre><table border="0" width="100%" bgcolor="#FFECCE"><col align="left" valign="top" width="0*"><tbody><tr><td><p><span class="term"><strong class="parameter"><code>item</code></strong>:</span></p></td><td>A goocanvas.Item
                            </td></tr><tr><td><p><span class="term"><strong class="parameter"><code>x</code></strong>:</span></p></td><td>The x coordinate to convert.</td></tr><tr><td><p><span class="term"><strong class="parameter"><code>y</code></strong>:</span></p></td><td>The y coordinate to convert.</td></tr><tr><td><p><span class="term"><span class="emphasis"><em>Returns</em></span>:</span></p></td><td>The new x and y coordinates.</td></tr></tbody></table><p>
                Converts a coordinate from the given item's coordinate space to the canvas coordinate space,
                applying all transformation matrices including the item's own transformation matrix, if it has one.
            </p></div><div class="refsect2" title="goocanvas.Canvas.convert_from_pixel"><a name="method-goocanvas--convert-from-pixel"></a><h3>goocanvas.Canvas.convert_from_pixel</h3><pre class="programlisting"><code class="methodsynopsis">    def <span class="methodname">convert_from_pixel</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>x</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>y</code></strong></span></span>)</code></pre><table border="0" width="100%" bgcolor="#FFECCE"><col align="left" valign="top" width="0*"><tbody><tr><td><p><span class="term"><strong class="parameter"><code>x</code></strong>:</span></p></td><td>The x coordinate to convert.</td></tr><tr><td><p><span class="term"><strong class="parameter"><code>y</code></strong>:</span></p></td><td>The y coordinate to convert.</td></tr><tr><td><p><span class="term"><span class="emphasis"><em>Returns</em></span>:</span></p></td><td>The new x and y coordinates.</td></tr></tbody></table><p>
                Converts a coordinate from pixels to the canvas coordinate space.
                The pixel coordinate space specifies pixels from the top-left of the entire canvas window,
                according to the current scale setting. See
                <code class="methodname">set_scale()</code>.
                The canvas view coordinate space is specified in the call to
                <code class="methodname">set_bounds()</code>.
            </p></div><div class="refsect2" title="goocanvas.Canvas.convert_to_item_space"><a name="method-goocanvas--convert-to-item-space"></a><h3>goocanvas.Canvas.convert_to_item_space</h3><pre class="programlisting"><code class="methodsynopsis">    def <span class="methodname">convert_to_item_space</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>item</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>x</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>y</code></strong></span></span>)</code></pre><table border="0" width="100%" bgcolor="#FFECCE"><col align="left" valign="top" width="0*"><tbody><tr><td><p><span class="term"><strong class="parameter"><code>item</code></strong>:</span></p></td><td>A goocanvas.Item
                            </td></tr><tr><td><p><span class="term"><strong class="parameter"><code>x</code></strong>:</span></p></td><td>The x coordinate to convert.</td></tr><tr><td><p><span class="term"><strong class="parameter"><code>y</code></strong>:</span></p></td><td>The y coordinate to convert.</td></tr><tr><td><p><span class="term"><span class="emphasis"><em>Returns</em></span>:</span></p></td><td>The new x and y coordinates.</td></tr></tbody></table><p>
                Converts a coordinate from the canvas coordinate space to the given item's coordinate space,
                applying all transformation matrices including the item's own transformation matrix, if it has one.
            </p></div><div class="refsect2" title="goocanvas.Canvas.convert_to_pixel"><a name="method-goocanvas--convert-to-pixel"></a><h3>goocanvas.Canvas.convert_to_pixel</h3><pre class="programlisting"><code class="methodsynopsis">    def <span class="methodname">convert_to_pixel</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>x</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>y</code></strong></span></span>)</code></pre><table border="0" width="100%" bgcolor="#FFECCE"><col align="left" valign="top" width="0*"><tbody><tr><td><p><span class="term"><strong class="parameter"><code>x</code></strong>:</span></p></td><td>The x coordinate to convert.</td></tr><tr><td><p><span class="term"><strong class="parameter"><code>y</code></strong>:</span></p></td><td>The y coordinate to convert.</td></tr><tr><td><p><span class="term"><span class="emphasis"><em>Returns</em></span>:</span></p></td><td>The new x and y coordinates.</td></tr></tbody></table><p>
                Converts a coordinate from the canvas coordinate space to pixels.
                The canvas coordinate space is specified in the call to
                <code class="methodname">set_bounds</code>
                The pixel coordinate space specifies pixels from the top-left of the entire canvas window,
                according to the current scale setting. See
                <code class="methodname">set_scale</code>
            </p></div><div class="refsect2" title="goocanvas.Canvas.create_cairo_context"><a name="method-goocanvas--create-cairo-context"></a><h3>goocanvas.Canvas.create_cairo_context</h3><pre class="programlisting"><code class="methodsynopsis">    def <span class="methodname">create_cairo_context</span>(<span class="methodparam"></span>)</code></pre><table border="0" width="100%" bgcolor="#FFECCE"><col align="left" valign="top" width="0*"><tbody><tr><td><p><span class="term"><span class="emphasis"><em>Returns</em></span>:</span></p></td><td>a new cairo context.</td></tr></tbody></table><p>
                Creates a cairo context, initialized with the default canvas settings.
            </p></div><div class="refsect2" title="goocanvas.Canvas.create_item"><a name="method-goocanvas--create-item"></a><h3>goocanvas.Canvas.create_item</h3><pre class="programlisting"><code class="methodsynopsis">    def <span class="methodname">create_item</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>model</code></strong></span></span>)</code></pre><table border="0" width="100%" bgcolor="#FFECCE"><col align="left" valign="top" width="0*"><tbody><tr><td><p><span class="term"><strong class="parameter"><code>model</code></strong>:</span></p></td><td>The item model to create a canvas item for.</td></tr><tr><td><p><span class="term"><span class="emphasis"><em>Returns</em></span>:</span></p></td><td>A new canvas item.</td></tr></tbody></table><p>
                Creates a new canvas item for the given item model, and recursively creates items for any children.
                It uses the create_item virtual method if it has been set.
                Subclasses of GooCanvas can define this method if they want to use custom views for items.
                It emits the "item-created" signal after
                creating the view, so application code can connect signal handlers to the new view if desired.
            </p></div><div class="refsect2" title="goocanvas.Canvas.get_bounds"><a name="method-goocanvas--get-bounds"></a><h3>goocanvas.Canvas.get_bounds</h3><pre class="programlisting"><code class="methodsynopsis">    def <span class="methodname">get_bounds</span>()</code></pre><table border="0" width="100%" bgcolor="#FFECCE"><col align="left" valign="top" width="0*"><tbody><tr><td><p><span class="term"><span class="emphasis"><em>Returns</em></span>:</span></p></td><td>A tuple with the four coordinates.</td></tr></tbody></table><p>
                Gets the bounds of the canvas, in canvas units. By default, canvas units are pixels,
                though the GooCanvas:units property can be used to change the units to points,
                inches or millimeters.
            </p></div><div class="refsect2" title="goocanvas.Canvas.get_default_line_width"><a name="method-goocanvas--get-default-line-width"></a><h3>goocanvas.Canvas.get_default_line_width</h3><pre class="programlisting"><code class="methodsynopsis">    def <span class="methodname">get_default_line_width</span>()</code></pre><table border="0" width="100%" bgcolor="#FFECCE"><col align="left" valign="top" width="0*"><tbody><tr><td><p><span class="term"><span class="emphasis"><em>Returns</em></span>:</span></p></td><td>The default line width of the canvas.</td></tr></tbody></table><p>
                Gets the default line width, which depends on the current units setting.
            </p></div><div class="refsect2" title="goocanvas.Canvas.get_item"><a name="method-goocanvas--get-item"></a><h3>goocanvas.Canvas.get_item</h3><pre class="programlisting"><code class="methodsynopsis">    def <span class="methodname">get_item</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>model</code></strong></span></span>)</code></pre><table border="0" width="100%" bgcolor="#FFECCE"><col align="left" valign="top" width="0*"><tbody><tr><td><p><span class="term"><strong class="parameter"><code>model</code></strong>:</span></p></td><td>A
                            <code class="classname">goocanvas.ItemModel</code>
                    </td></tr><tr><td><p><span class="term"><span class="emphasis"><em>Returns</em></span>:</span></p></td><td>The canvas item corresponding to the given
                                            <code class="classname">goocanvas.ItemModel</code>
                                            or None if no canvas item has been created for it yet.
                    </td></tr></tbody></table><p>
                Gets the canvas item associated with the given
                <code class="classname">goocanvas.ItemModel</code>.
                This is only useful when set_root_item_model
                has been used to set a model for the canvas.
            </p><p>
                For simple applications you can use get_item
                to set up signal handlers for your items, e.g.
            </p><pre class="programlisting">
                item = canvas.get_item (my_item)
                item.connect ("button_press_event", on_my_item_button_press)</pre><p>
                More complex applications may want to use the GooCanvas::item-created signal to hook up their signal handlers.
            </p></div><div class="refsect2" title="goocanvas.Canvas.get_item_at"><a name="method-goocanvas--get-item-at"></a><h3>goocanvas.Canvas.get_item_at</h3><pre class="programlisting"><code class="methodsynopsis">    def <span class="methodname">get_item_at</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>x</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>y</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>is_pointer_event</code></strong></span></span>)</code></pre><table border="0" width="100%" bgcolor="#FFECCE"><col align="left" valign="top" width="0*"><tbody><tr><td><p><span class="term"><strong class="parameter"><code>x</code></strong>:</span></p></td><td>The x coordinate of the point.</td></tr><tr><td><p><span class="term"><strong class="parameter"><code>y</code></strong>:</span></p></td><td>The y coordinate of the point.</td></tr><tr><td><p><span class="term"><strong class="parameter"><code>is_pointer_event</code></strong>:</span></p></td><td>True if the "pointer-events" property of items should be used
                                                         to determine which parts of the item are tested.</td></tr><tr><td><p><span class="term"><span class="emphasis"><em>Returns</em></span>:</span></p></td><td>The item found at the given point, or None if no item was found.</td></tr></tbody></table><p>Gets the item at the given point.</p></div><div class="refsect2" title="goocanvas.Canvas.get_items_at"><a name="method-goocanvas--get-items-at"></a><h3>goocanvas.Canvas.get_items_at</h3><pre class="programlisting"><code class="methodsynopsis">    def <span class="methodname">get_items_at</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>x</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>y</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>is_pointer_event</code></strong></span></span>)</code></pre><table border="0" width="100%" bgcolor="#FFECCE"><col align="left" valign="top" width="0*"><tbody><tr><td><p><span class="term"><strong class="parameter"><code>x</code></strong>:</span></p></td><td>The x coordinate of the point.</td></tr><tr><td><p><span class="term"><strong class="parameter"><code>y</code></strong>:</span></p></td><td>The y coordinate of the point.</td></tr><tr><td><p><span class="term"><strong class="parameter"><code>is_pointer_event</code></strong>:</span></p></td><td>True if the "pointer-events" property of items should be used
                                                         to determine which parts of the item are tested.</td></tr><tr><td><p><span class="term"><span class="emphasis"><em>Returns</em></span>:</span></p></td><td>A list of items found at the given point, with the top item at
                                                         the start of the list, or None if no items were found. </td></tr></tbody></table><p>Gets all items at the given point.</p></div><div class="refsect2" title="goocanvas.Canvas.get_items_in_area"><a name="method-goocanvas--get-items-in-area"></a><h3>goocanvas.Canvas.get_items_in_area</h3><pre class="programlisting"><code class="methodsynopsis">    def <span class="methodname">get_items_in_area</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>area</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>inside_area</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>allow_overlaps</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>include_containers</code></strong></span></span>)</code></pre><table border="0" width="100%" bgcolor="#FFECCE"><col align="left" valign="top" width="0*"><tbody><tr><td><p><span class="term"><strong class="parameter"><code>area</code></strong>:</span></p></td><td>The area to compare with each item's bounds.</td></tr><tr><td><p><span class="term"><strong class="parameter"><code>inside_area</code></strong>:</span></p></td><td>True if items inside area should be returned, or False if items outside
                                                         area should be returned.</td></tr><tr><td><p><span class="term"><strong class="parameter"><code>allow_overlaps</code></strong>:</span></p></td><td>True if items which are partly inside and partly outside
                                                         should be returned.</td></tr><tr><td><p><span class="term"><strong class="parameter"><code>include_containers</code></strong>:</span></p></td><td>True if containers should be checked as well as normal items.</td></tr><tr><td><p><span class="term"><span class="emphasis"><em>Returns</em></span>:</span></p></td><td>A list of items in the given area, or None if no items are found.</td></tr></tbody></table><p>
                Gets a list of items inside or outside a given area.
            </p></div><div class="refsect2" title="goocanvas.Canvas.get_root_item"><a name="method-goocanvas--get-root-item"></a><h3>goocanvas.Canvas.get_root_item</h3><pre class="programlisting"><code class="methodsynopsis">    def <span class="methodname">get_root_item</span>()</code></pre><table border="0" width="100%" bgcolor="#FFECCE"><col align="left" valign="top" width="0*"><tbody><tr><td><p><span class="term"><span class="emphasis"><em>Returns</em></span>:</span></p></td><td>The root item, or None if there is no root item.</td></tr></tbody></table><p>
                Gets the root item of the canvas, usually a
                <code class="classname">goocanvas.Group</code>.
            </p></div><div class="refsect2" title="goocanvas.Canvas.get_root_item_model"><a name="method-goocanvas--get-root-item-model"></a><h3>goocanvas.Canvas.get_root_item_model</h3><pre class="programlisting"><code class="methodsynopsis">    def <span class="methodname">get_root_item_model</span>()</code></pre><table border="0" width="100%" bgcolor="#FFECCE"><col align="left" valign="top" width="0*"><tbody><tr><td><p><span class="term"><span class="emphasis"><em>Returns</em></span>:</span></p></td><td>The root item model, or None if there is no root item.</td></tr></tbody></table><p>
                Gets the root item model of the canvas, usually a
                <code class="classname">goocanvas.GroupModel</code>.
            </p></div><div class="refsect2" title="goocanvas.Canvas.get_scale"><a name="method-goocanvas--get-scale"></a><h3>goocanvas.Canvas.get_scale</h3><pre class="programlisting"><code class="methodsynopsis">    def <span class="methodname">get_scale</span>()</code></pre><table border="0" width="100%" bgcolor="#FFECCE"><col align="left" valign="top" width="0*"><tbody><tr><td><p><span class="term"><span class="emphasis"><em>Returns</em></span>:</span></p></td><td>The current scale setting.</td></tr></tbody></table><p>
                Gets the current scale of the canvas, i.e. the number of pixels to use for each device unit.
            </p></div><div class="refsect2" title="goocanvas.Canvas.get_static_root_item"><a name="method-goocanvas--get-static-root-item"></a><h3>goocanvas.Canvas.get_static_root_item</h3><pre class="programlisting"><code class="methodsynopsis">    def <span class="methodname">get_static_root_item</span>()</code></pre><table border="0" width="100%" bgcolor="#FFECCE"><col align="left" valign="top" width="0*"><tbody><tr><td><p><span class="term"><span class="emphasis"><em>Returns</em></span>:</span></p></td><td>the static root item, or <code class="literal">None</code>.</td></tr></tbody></table><p>
                Gets the static root item of the canvas.
            </p></div><div class="refsect2" title="goocanvas.Canvas.get_static_root_item_model"><a name="method-goocanvas--get-static-root-item-model"></a><h3>goocanvas.Canvas.get_static_root_item_model</h3><pre class="programlisting"><code class="methodsynopsis">    def <span class="methodname">get_static_root_item_model</span>()</code></pre><table border="0" width="100%" bgcolor="#FFECCE"><col align="left" valign="top" width="0*"><tbody><tr><td><p><span class="term"><span class="emphasis"><em>Returns</em></span>:</span></p></td><td>the static root item model, or <code class="literal">None</code>.</td></tr></tbody></table><p>
                Gets the static root item model of the canvas.
            </p></div><div class="refsect2" title="goocanvas.Canvas.grab_focus"><a name="method-goocanvas--grab-focus"></a><h3>goocanvas.Canvas.grab_focus</h3><pre class="programlisting"><code class="methodsynopsis">    def <span class="methodname">grab_focus</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>item</code></strong></span></span>)</code></pre><table border="0" width="100%" bgcolor="#FFECCE"><col align="left" valign="top" width="0*"><tbody><tr><td><p><span class="term"><strong class="parameter"><code>item</code></strong>:</span></p></td><td>The item to grab the focus.</td></tr></tbody></table><p>Grabs the keyboard focus for the given item.</p></div><div class="refsect2" title="goocanvas.Canvas.keyboard_grab"><a name="method-goocanvas--keyword-grab"></a><h3>goocanvas.Canvas.keyboard_grab</h3><pre class="programlisting"><code class="methodsynopsis">    def <span class="methodname">keyboard_grab</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>item</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>owner_events</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>time</code></strong></span></span>)</code></pre><table border="0" width="100%" bgcolor="#FFECCE"><col align="left" valign="top" width="0*"><tbody><tr><td><p><span class="term"><strong class="parameter"><code>item</code></strong>:</span></p></td><td>The item to grab the keyword for.</td></tr><tr><td><p><span class="term"><strong class="parameter"><code>owner_events</code></strong>:</span></p></td><td><code class="literal">True</code> if keyboard events for this application
                            will be reported normally, or <code class="literal">False</code> if all keyboard events will
                            be reported with respect to the grab item.</td></tr><tr><td><p><span class="term"><strong class="parameter"><code>time</code></strong>:</span></p></td><td>The time of the event that lead to the keyboard grab.
                            This should come from the relevant
                            <code class="classname">gtk.gdk.Event</code>
                    </td></tr><tr><td><p><span class="term"><span class="emphasis"><em>Returns</em></span>:</span></p></td><td>gtk.gdk.GRAB_SUCCESS if the grab succeeded.</td></tr></tbody></table><p>Grabs the keyboard focus for the given item.</p></div><div class="refsect2" title="goocanvas.Canvas.keyboard_ungrab"><a name="method-goocanvas--keyboard-ungrab"></a><h3>goocanvas.Canvas.keyboard_ungrab</h3><pre class="programlisting"><code class="methodsynopsis">    def <span class="methodname">keyboard_grab</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>item</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>time</code></strong></span></span>)</code></pre><table border="0" width="100%" bgcolor="#FFECCE"><col align="left" valign="top" width="0*"><tbody><tr><td><p><span class="term"><strong class="parameter"><code>item</code></strong>:</span></p></td><td>The item that has the keyboard grab.</td></tr><tr><td><p><span class="term"><strong class="parameter"><code>time</code></strong>:</span></p></td><td>The time of the event that lead to the keyboard ungrab.
                            This should come from the relevant
                            <code class="classname">gtk.gdk.Event</code>
                    </td></tr></tbody></table><p>Ungrabs the pointer, if the given item view has the pointer grab.</p></div><div class="refsect2" title="goocanvas.Canvas.pointer_grab"><a name="method-goocanvas--pointer-grab"></a><h3>goocanvas.Canvas.pointer_grab</h3><pre class="programlisting"><code class="methodsynopsis">    def <span class="methodname">pointer_grab</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>item</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>event_mask</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>cursor</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>time</code></strong></span></span>)</code></pre><table border="0" width="100%" bgcolor="#FFECCE"><col align="left" valign="top" width="0*"><tbody><tr><td><p><span class="term"><strong class="parameter"><code>item</code></strong>:</span></p></td><td>The item to grab the pointer for.</td></tr><tr><td><p><span class="term"><strong class="parameter"><code>event_mask</code></strong>:</span></p></td><td>The events to receive during the grab.</td></tr><tr><td><p><span class="term"><strong class="parameter"><code>cursor</code></strong>:</span></p></td><td>The cursor to display during the grab, or <code class="literal">None</code>.
                    </td></tr><tr><td><p><span class="term"><strong class="parameter"><code>time</code></strong>:</span></p></td><td>The time of the event that lead to the pointer grab.
                            This should come from the relevant
                            <code class="classname">gtk.gdk.Event</code>.
                    </td></tr><tr><td><p><span class="term"><span class="emphasis"><em>Returns</em></span>:</span></p></td><td>gtk.gdk.GRAB_SUCCESS if the grab succeeded.</td></tr></tbody></table><p>Attempts to grab the pointer for the given item.</p></div><div class="refsect2" title="goocanvas.Canvas.pointer_ungrab"><a name="method-goocanvas--pointer-ungrab"></a><h3>goocanvas.Canvas.pointer_ungrab</h3><pre class="programlisting"><code class="methodsynopsis">    def <span class="methodname">pointer_ungrab</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>item</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>time</code></strong></span></span>)</code></pre><table border="0" width="100%" bgcolor="#FFECCE"><col align="left" valign="top" width="0*"><tbody><tr><td><p><span class="term"><strong class="parameter"><code>item</code></strong>:</span></p></td><td>The item that has the pointer grab.</td></tr><tr><td><p><span class="term"><strong class="parameter"><code>time</code></strong>:</span></p></td><td>The time of the event that lead to the pointer ungrab.
                            This should come from the relevant
                            <code class="classname">gtk.gdk.Event</code>
                        </td></tr></tbody></table><p>Ungrabs the pointer, if the given item view has the pointer grab.</p></div><div class="refsect2" title="goocanvas.Canvas.register_widget_item"><a name="method-goocanvas--register-widget-item"></a><h3>goocanvas.Canvas.register_widget_item</h3><pre class="programlisting"><code class="methodsynopsis">    def <span class="methodname">register_widget_item</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>witem</code></strong></span></span>)</code></pre><table border="0" width="100%" bgcolor="#FFECCE"><col align="left" valign="top" width="0*"><tbody><tr><td><p><span class="term"><strong class="parameter"><code>witem</code></strong>:</span></p></td><td>A <code class="classname">goocanvas.Widget</code>.
                    </td></tr></tbody></table><p>Registers a widget item with the canvas, so that the canvas can do the necessary
                actions to move and resize the widget as needed.
            </p><p>
                This function should only be used by
                <code class="classname">goocanvas.Widget</code>
                and subclass implementations.
            </p></div><div class="refsect2" title="goocanvas.Canvas.render"><a name="method-goocanvas--render"></a><h3>goocanvas.Canvas.render</h3><pre class="programlisting"><code class="methodsynopsis">    def <span class="methodname">render</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>cr</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>bounds</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>scale</code></strong></span></span>)</code></pre><table border="0" width="100%" bgcolor="#FFECCE"><col align="left" valign="top" width="0*"><tbody><tr><td><p><span class="term"><strong class="parameter"><code>cr</code></strong>:</span></p></td><td>A cairo context.</td></tr><tr><td><p><span class="term"><strong class="parameter"><code>bounds</code></strong>:</span></p></td><td>The area to render, or <code class="literal">None</code>
                            to render the entire canvas.</td></tr><tr><td><p><span class="term"><strong class="parameter"><code>scale</code></strong>:</span></p></td><td>The scale to compare with each item's visibility threshold to see
                            if they should be rendered. This only affects items that have their visibility set
                            to goocanvas.ITEM_VISIBLE_ABOVE_THRESHOLD.</td></tr></tbody></table><p>Renders all or part of a canvas to the given cairo context.</p></div><div class="refsect2" title="goocanvas.Canvas.request_item_redraw"><a name="method-goocanvas--request-item-redraw"></a><h3>goocanvas.Canvas.request_item_redraw</h3><pre class="programlisting"><code class="methodsynopsis">    def <span class="methodname">request_item_redraw</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>bounds</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>is_static</code></strong></span></span>)</code></pre><table border="0" width="100%" bgcolor="#FFECCE"><col align="left" valign="top" width="0*"><tbody><tr><td><p><span class="term"><strong class="parameter"><code>bounds</code></strong>:</span></p></td><td>the bounds of the item to redraw.</td></tr><tr><td><p><span class="term"><strong class="parameter"><code>is_static</code></strong>:</span></p></td><td>if the item is static.</td></tr></tbody></table><p>
                Requests that the given bounds be redrawn.
            </p></div><div class="refsect2" title="goocanvas.Canvas.request_redraw"><a name="method-goocanvas--request-redraw"></a><h3>goocanvas.Canvas.request_redraw</h3><pre class="programlisting"><code class="methodsynopsis">    def <span class="methodname">request_redraw</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>bounds</code></strong></span></span>)</code></pre><table border="0" width="100%" bgcolor="#FFECCE"><col align="left" valign="top" width="0*"><tbody><tr><td><p><span class="term"><strong class="parameter"><code>bounds</code></strong>:</span></p></td><td>The bounds to redraw.</td></tr></tbody></table><p>Requests that the given bounds be redrawn.</p></div><div class="refsect2" title="goocanvas.Canvas.request_update"><a name="method-goocanvas--request-update"></a><h3>goocanvas.Canvas.request_update</h3><pre class="programlisting"><code class="methodsynopsis">    def <span class="methodname">request_update</span>()</code></pre><table border="0" width="100%" bgcolor="#FFECCE"><col align="left" valign="top" width="0*"><tbody></tbody></table><p>
                Schedules an update of the
                <code class="classname">goocanvas.Canvas</code>.
                This will be performed in the idle loop, after all pending events have been handled,
                but before the canvas has been repainted.
            </p></div><div class="refsect2" title="goocanvas.Canvas.scroll_to"><a name="method-goocanvas--scroll-to"></a><h3>goocanvas.Canvas.scroll_to</h3><pre class="programlisting"><code class="methodsynopsis">    def <span class="methodname">scroll_to</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>left</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>top</code></strong></span></span>)</code></pre><table border="0" width="100%" bgcolor="#FFECCE"><col align="left" valign="top" width="0*"><tbody><tr><td><p><span class="term"><strong class="parameter"><code>left</code></strong>:</span></p></td><td>The x coordinate to scroll to.</td></tr><tr><td><p><span class="term"><strong class="parameter"><code>top</code></strong>:</span></p></td><td>The y coordinate to scroll to.</td></tr></tbody></table><p>
                Scrolls the canvas, placing the given point as close to the top-left of
                the view as possible.
            </p></div><div class="refsect2" title="goocanvas.Canvas.set_bounds"><a name="method-goocanvas--set-bounds"></a><h3>goocanvas.Canvas.set_bounds</h3><pre class="programlisting"><code class="methodsynopsis">    def <span class="methodname">set_bounds</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>left</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>top</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>right</code></strong></span></span>, <span class="methodparam"><span class="parameter"><strong class="parameter"><code>bottom</code></strong></span></span>)</code></pre><table border="0" width="100%" bgcolor="#FFECCE"><col align="left" valign="top" width="0*"><tbody><tr><td><p><span class="term"><strong class="parameter"><code>left</code></strong>:</span></p></td><td>The left edge.</td></tr><tr><td><p><span class="term"><strong class="parameter"><code>top</code></strong>:</span></p></td><td>The top edge.</td></tr><tr><td><p><span class="term"><strong class="parameter"><code>right</code></strong>:</span></p></td><td>The right edge.</td></tr><tr><td><p><span class="term"><strong class="parameter"><code>bottom</code></strong>:</span></p></td><td>The bottom edge.</td></tr></tbody></table><p>
                Sets the bounds of the
                <code class="classname">goocanvas.Canvas</code>
                in device units. By default, device units are the same as pixels, though
                <code class="methodname">set_scale</code>
                can be used to specify a different scale.
            </p></div><div class="refsect2" title="goocanvas.Canvas.set_root_item"><a name="method-goocanvas--set-root-item"></a><h3>goocanvas.Canvas.set_root_item</h3><pre class="programlisting"><code class="methodsynopsis">    def <span class="methodname">set_root_item</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>item</code></strong></span></span>)</code></pre><table border="0" width="100%" bgcolor="#FFECCE"><col align="left" valign="top" width="0*"><tbody><tr><td><p><span class="term"><strong class="parameter"><code>item</code></strong>:</span></p></td><td>The root canvas item.</td></tr></tbody></table><p>
                Sets the root item of the canvas. Any existing canvas items are removed.
            </p></div><div class="refsect2" title="goocanvas.Canvas.set_root_item_model"><a name="method-goocanvas--set-root-item-model"></a><h3>goocanvas.Canvas.set_root_item_model</h3><pre class="programlisting"><code class="methodsynopsis">    def <span class="methodname">set_root_item_model</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>model</code></strong></span></span>)</code></pre><table border="0" width="100%" bgcolor="#FFECCE"><col align="left" valign="top" width="0*"><tbody><tr><td><p><span class="term"><strong class="parameter"><code>model</code></strong>:</span></p></td><td>The root canvas item model.</td></tr></tbody></table><p>
                Sets the root item of the canvas. A hierarchy of canvas items will be created,
                corresponding to the hierarchy of items in the model.
                Any current canvas items will be removed.
            </p></div><div class="refsect2" title="goocanvas.Canvas.set_scale"><a name="method-goocanvas--set-scale"></a><h3>goocanvas.Canvas.set_scale</h3><pre class="programlisting"><code class="methodsynopsis">    def <span class="methodname">set_scale</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>pixel_per_unit</code></strong></span></span>)</code></pre><table border="0" width="100%" bgcolor="#FFECCE"><col align="left" valign="top" width="0*"><tbody><tr><td><p><span class="term"><strong class="parameter"><code>pixel_per_unit</code></strong>:</span></p></td><td>The new scale setting.</td></tr></tbody></table><p>
                Sets the current scale of the canvas, i.e. the number of pixels
                to use for each device unit.
            </p></div><div class="refsect2" title="goocanvas.Canvas.set_static_root_item"><a name="method-goocanvas--set-static-root-item"></a><h3>goocanvas.Canvas.set_static_root_item</h3><pre class="programlisting"><code class="methodsynopsis">    def <span class="methodname">set_static_root_item</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>item</code></strong></span></span>)</code></pre><table border="0" width="100%" bgcolor="#FFECCE"><col align="left" valign="top" width="0*"><tbody><tr><td><p><span class="term"><strong class="parameter"><code>item</code></strong>:</span></p></td><td>the static root item.</td></tr></tbody></table><p>
               Sets the static root item. Any existing static items are removed.
            </p></div><div class="refsect2" title="goocanvas.Canvas.set_static_root_item_model"><a name="method-goocanvas--set-static-root-item-model"></a><h3>goocanvas.Canvas.set_static_root_item_model</h3><pre class="programlisting"><code class="methodsynopsis">    def <span class="methodname">set_static_root_item_model</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>model</code></strong></span></span>)</code></pre><table border="0" width="100%" bgcolor="#FFECCE"><col align="left" valign="top" width="0*"><tbody><tr><td><p><span class="term"><strong class="parameter"><code>model</code></strong>:</span></p></td><td>the static root item model.</td></tr></tbody></table><p>
               Sets the static root item model. Any existing static items are removed.
            </p></div><div class="refsect2" title="goocanvas.Canvas.unregister_item"><a name="method-goocanvas--unregister-item"></a><h3>goocanvas.Canvas.unregister_item</h3><pre class="programlisting"><code class="methodsynopsis">    def <span class="methodname">unregister_item</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>model</code></strong></span></span>)</code></pre><table border="0" width="100%" bgcolor="#FFECCE"><col align="left" valign="top" width="0*"><tbody><tr><td><p><span class="term"><strong class="parameter"><code>model</code></strong>:</span></p></td><td>The item model whose canvas item is being finalized.</td></tr></tbody></table><p>
                This function should be called in the finalize method of
                <code class="classname">goocanvas.Item</code>
                objects, to remove the canvas item from the GooCanvas's hash table.
            </p></div><div class="refsect2" title="goocanvas.Canvas.unregister_widget_item"><a name="method-goocanvas--unregister-widget-item"></a><h3>goocanvas.Canvas.unregister_widget_item</h3><pre class="programlisting"><code class="methodsynopsis">    def <span class="methodname">unregister_widget_item</span>(<span class="methodparam"><span class="parameter"><strong class="parameter"><code>witem</code></strong></span></span>)</code></pre><table border="0" width="100%" bgcolor="#FFECCE"><col align="left" valign="top" width="0*"><tbody><tr><td><p><span class="term"><strong class="parameter"><code>witem</code></strong>:</span></p></td><td>A
                        <code class="classname">goocanvas.Widget</code> item.
                    </td></tr></tbody></table><p>
                Unregisters a widget item from the canvas, when the item is no longer in the canvas.
            </p><p>
                This function should only be used by
                <code class="classname">goocanvas.Widget</code>
                and ubclass implementations.
            </p></div><div class="refsect2" title="goocanvas.Canvas.update"><a name="method-goocanvas--update"></a><h3>goocanvas.Canvas.update</h3><pre class="programlisting"><code class="methodsynopsis">    def <span class="methodname">update</span>()</code></pre><table border="0" width="100%" bgcolor="#FFECCE"><col align="left" valign="top" width="0*"><tbody></tbody></table><p>
                Updates any items that need updating.
                This is only intended to be used by subclasses of
                <code class="classname">goocanvas.Canvas</code> or
                <code class="classname">goocanvas.Item</code>
                implementation.
            </p></div></div><div class="refsect1" title="Signals"><a name="idp514496"></a><h2>Signals</h2><div class="refsect2" title='The "item-created" goocanvas.Canvas Signal'><a name="signal-goocanvas--item-created"></a><h3>The "item-created" goocanvas.Canvas Signal</h3><pre class="programlisting"><code class="methodsynopsis">    def <span class="methodname">callback</span>(<span class="methodparam"><span class="parameter"><em class="parameter"><code>canvas</code></em></span></span>, <span class="methodparam"><span class="parameter"><em class="parameter"><code>item</code></em></span></span>, <span class="methodparam"><span class="parameter"><em class="parameter"><code>model</code></em></span></span>, <span class="methodparam"><span class="parameter"><em class="parameter"><code>user_param</code></em></span></span>, <span class="methodparam"><span class="parameter"><em class="parameter"><code>...</code></em></span></span>)</code></pre><table border="0" width="100%" bgcolor="#FFECCE"><col align="left" valign="top" width="0*"><tbody><tr><td><p><span class="term"><em class="parameter"><code>canvas</code></em>:</span></p></td><td>
                        The <code class="classname">goocanvas.Canvas</code>.
                    </td></tr><tr><td><p><span class="term"><em class="parameter"><code>item</code></em>:</span></p></td><td>
                        The new <code class="classname">goocanvas.Item</code>.
                    </td></tr><tr><td><p><span class="term"><em class="parameter"><code>model</code></em>:</span></p></td><td>
                        The <code class="classname">goocanvas.ItemModel</code>.
                    </td></tr><tr><td><p><span class="term"><em class="parameter"><code>user_param</code></em>:</span></p></td><td>the first user parameter (if any) specified
                        with the <a
href="../pygobject/class-gobject.html#method-gobject--connect"
><code class="methodname">connect</code>()</a>
                        method
                    </td></tr><tr><td><p><span class="term"><em class="parameter"><code>...</code></em>:</span></p></td><td>additional user parameters (if any)</td></tr></tbody></table><p>
                The 'item-created" signal is emitted when the a new canvas item is created.
                Applications can set up signal handlers for the new items here.
            </p></div><div class="refsect2" title='The "set-scroll-adjustments" goocanvas.Canvas Signal'><a name="signal-goocanvas--set-scroll-adjustments"></a><h3>The "set-scroll-adjustments" goocanvas.Canvas Signal</h3><pre class="programlisting"><code class="methodsynopsis">    def <span class="methodname">callback</span>(<span class="methodparam"><span class="parameter"><em class="parameter"><code>canvas</code></em></span></span>, <span class="methodparam"><span class="parameter"><em class="parameter"><code>hadjustment</code></em></span></span>, <span class="methodparam"><span class="parameter"><em class="parameter"><code>vadjustment</code></em></span></span>, <span class="methodparam"><span class="parameter"><em class="parameter"><code>user_param</code></em></span></span>, <span class="methodparam"><span class="parameter"><em class="parameter"><code>...</code></em></span></span>)</code></pre><table border="0" width="100%" bgcolor="#FFECCE"><col align="left" valign="top" width="0*"><tbody><tr><td><p><span class="term"><em class="parameter"><code>canvas</code></em>:</span></p></td><td>
                            The <code class="classname">goocanvas.Canvas</code>.
                        </td></tr><tr><td><p><span class="term"><em class="parameter"><code>hadjustment</code></em>:</span></p></td><td>
                            The horizontal adjustment.
                        </td></tr><tr><td><p><span class="term"><em class="parameter"><code>vadjustment</code></em>:</span></p></td><td>
                            The vertical adjustment.
                        </td></tr><tr><td><p><span class="term"><em class="parameter"><code>user_param</code></em>:</span></p></td><td>the first user parameter (if any) specified
                            with the <a
href="../pygobject/class-gobject.html#method-gobject--connect"
><code class="methodname">connect</code>()</a>
                            method
                        </td></tr><tr><td><p><span class="term"><em class="parameter"><code>...</code></em>:</span></p></td><td>additional user parameters (if any)</td></tr></tbody></table><p>
                The 'set-scroll-adjustments" signal is emitted when the GooCanvas is placed inside a
                <code class="classname">gtk.ScrolledWindow</code>,
                to connect up the adjustments so scrolling works properly.
                It isn't useful for applications.
            </p></div></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="pygoocanvas-core-classes.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="pygoocanvas-core-classes.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="class-canvas-item.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">PyGooCanvas Core Class Reference </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> goocanvas.Item</td></tr></table></div></body></html>