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<a name="GooCanvasPolylineModel"></a><div class="titlepage"></div>
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<td valign="top">
<h2><span class="refentrytitle"><a name="GooCanvasPolylineModel.top_of_page"></a>GooCanvasPolylineModel</span></h2>
<p>GooCanvasPolylineModel — a model for polyline items (a series of lines with
optional arrows).</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv">
<a name="GooCanvasPolylineModel.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">struct <a class="link" href="GooCanvasPolylineModel.html#GooCanvasPolylineModel-struct" title="struct GooCanvasPolylineModel">GooCanvasPolylineModel</a>;
<a class="link" href="GooCanvasItemModel.html" title="GooCanvasItemModel"><span class="returnvalue">GooCanvasItemModel</span></a> * <a class="link" href="GooCanvasPolylineModel.html#goo-canvas-polyline-model-new" title="goo_canvas_polyline_model_new ()">goo_canvas_polyline_model_new</a> (<em class="parameter"><code><a class="link" href="GooCanvasItemModel.html" title="GooCanvasItemModel"><span class="type">GooCanvasItemModel</span></a> *parent</code></em>,
<em class="parameter"><code><span class="type">gboolean</span> close_path</code></em>,
<em class="parameter"><code><span class="type">gint</span> num_points</code></em>,
<em class="parameter"><code>...</code></em>);
<a class="link" href="GooCanvasItemModel.html" title="GooCanvasItemModel"><span class="returnvalue">GooCanvasItemModel</span></a> * <a class="link" href="GooCanvasPolylineModel.html#goo-canvas-polyline-model-new-line" title="goo_canvas_polyline_model_new_line ()">goo_canvas_polyline_model_new_line</a> (<em class="parameter"><code><a class="link" href="GooCanvasItemModel.html" title="GooCanvasItemModel"><span class="type">GooCanvasItemModel</span></a> *parent</code></em>,
<em class="parameter"><code><span class="type">gdouble</span> x1</code></em>,
<em class="parameter"><code><span class="type">gdouble</span> y1</code></em>,
<em class="parameter"><code><span class="type">gdouble</span> x2</code></em>,
<em class="parameter"><code><span class="type">gdouble</span> y2</code></em>,
<em class="parameter"><code>...</code></em>);
</pre>
</div>
<div class="refsect1">
<a name="GooCanvasPolylineModel.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="synopsis">
GObject
+----<a class="link" href="GooCanvasItemModelSimple.html" title="GooCanvasItemModelSimple">GooCanvasItemModelSimple</a>
+----GooCanvasPolylineModel
</pre>
</div>
<div class="refsect1">
<a name="GooCanvasPolylineModel.implemented-interfaces"></a><h2>Implemented Interfaces</h2>
<p>
GooCanvasPolylineModel implements
<a class="link" href="GooCanvasItemModel.html" title="GooCanvasItemModel">GooCanvasItemModel</a>.</p>
</div>
<div class="refsect1">
<a name="GooCanvasPolylineModel.properties"></a><h2>Properties</h2>
<pre class="synopsis">
"<a class="link" href="GooCanvasPolylineModel.html#GooCanvasPolylineModel--arrow-length" title='The "arrow-length" property'>arrow-length</a>" <span class="type">gdouble</span> : Read / Write
"<a class="link" href="GooCanvasPolylineModel.html#GooCanvasPolylineModel--arrow-tip-length" title='The "arrow-tip-length" property'>arrow-tip-length</a>" <span class="type">gdouble</span> : Read / Write
"<a class="link" href="GooCanvasPolylineModel.html#GooCanvasPolylineModel--arrow-width" title='The "arrow-width" property'>arrow-width</a>" <span class="type">gdouble</span> : Read / Write
"<a class="link" href="GooCanvasPolylineModel.html#GooCanvasPolylineModel--close-path" title='The "close-path" property'>close-path</a>" <span class="type">gboolean</span> : Read / Write
"<a class="link" href="GooCanvasPolylineModel.html#GooCanvasPolylineModel--end-arrow" title='The "end-arrow" property'>end-arrow</a>" <span class="type">gboolean</span> : Read / Write
"<a class="link" href="GooCanvasPolylineModel.html#GooCanvasPolylineModel--height" title='The "height" property'>height</a>" <span class="type">gdouble</span> : Read / Write
"<a class="link" href="GooCanvasPolylineModel.html#GooCanvasPolylineModel--points" title='The "points" property'>points</a>" <a class="link" href="goocanvas2-GooCanvas-Types.html#GooCanvasPoints"><span class="type">GooCanvasPoints</span></a>* : Read / Write
"<a class="link" href="GooCanvasPolylineModel.html#GooCanvasPolylineModel--start-arrow" title='The "start-arrow" property'>start-arrow</a>" <span class="type">gboolean</span> : Read / Write
"<a class="link" href="GooCanvasPolylineModel.html#GooCanvasPolylineModel--width" title='The "width" property'>width</a>" <span class="type">gdouble</span> : Read / Write
"<a class="link" href="GooCanvasPolylineModel.html#GooCanvasPolylineModel--x" title='The "x" property'>x</a>" <span class="type">gdouble</span> : Read / Write
"<a class="link" href="GooCanvasPolylineModel.html#GooCanvasPolylineModel--y" title='The "y" property'>y</a>" <span class="type">gdouble</span> : Read / Write
</pre>
</div>
<div class="refsect1">
<a name="GooCanvasPolylineModel.description"></a><h2>Description</h2>
<p>
GooCanvasPolylineModel represents a model for polyline items, which are a
series of one or more lines, with optional arrows at either end.
</p>
<p>
It is a subclass of <a class="link" href="GooCanvasItemModelSimple.html" title="GooCanvasItemModelSimple"><span class="type">GooCanvasItemModelSimple</span></a> and so inherits all of the
style properties such as "stroke-color", "fill-color" and "line-width".
</p>
<p>
It also implements the <a class="link" href="GooCanvasItemModel.html" title="GooCanvasItemModel"><span class="type">GooCanvasItemModel</span></a> interface, so you can use the
<a class="link" href="GooCanvasItemModel.html" title="GooCanvasItemModel"><span class="type">GooCanvasItemModel</span></a> functions such as <a class="link" href="GooCanvasItemModel.html#goo-canvas-item-model-raise" title="goo_canvas_item_model_raise ()"><code class="function">goo_canvas_item_model_raise()</code></a> and
<a class="link" href="GooCanvasItemModel.html#goo-canvas-item-model-rotate" title="goo_canvas_item_model_rotate ()"><code class="function">goo_canvas_item_model_rotate()</code></a>.
</p>
<p>
To create a <a class="link" href="GooCanvasPolylineModel.html" title="GooCanvasPolylineModel"><span class="type">GooCanvasPolylineModel</span></a> use <a class="link" href="GooCanvasPolylineModel.html#goo-canvas-polyline-model-new" title="goo_canvas_polyline_model_new ()"><code class="function">goo_canvas_polyline_model_new()</code></a>, or
<a class="link" href="GooCanvasPolylineModel.html#goo-canvas-polyline-model-new-line" title="goo_canvas_polyline_model_new_line ()"><code class="function">goo_canvas_polyline_model_new_line()</code></a> for a simple line between two points.
</p>
<p>
To get or set the properties of an existing <a class="link" href="GooCanvasPolylineModel.html" title="GooCanvasPolylineModel"><span class="type">GooCanvasPolylineModel</span></a>, use
<code class="function">g_object_get()</code> and <code class="function">g_object_set()</code>.
</p>
<p>
To respond to events such as mouse clicks on the polyline you must connect
to the signal handlers of the corresponding <a class="link" href="GooCanvasPolyline.html" title="GooCanvasPolyline"><span class="type">GooCanvasPolyline</span></a> objects.
(See <a class="link" href="GooCanvas.html#goo-canvas-get-item" title="goo_canvas_get_item ()"><code class="function">goo_canvas_get_item()</code></a> and <a class="link" href="GooCanvas.html#GooCanvas-item-created" title='The "item-created" signal'><span class="type">"item-created"</span></a>.)
</p>
</div>
<div class="refsect1">
<a name="GooCanvasPolylineModel.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="GooCanvasPolylineModel-struct"></a><h3>struct GooCanvasPolylineModel</h3>
<pre class="programlisting">struct GooCanvasPolylineModel;</pre>
<p>
The <a class="link" href="GooCanvasPolylineModel.html#GooCanvasPolylineModel-struct" title="struct GooCanvasPolylineModel"><span class="type">GooCanvasPolylineModel</span></a> struct contains private data only.
</p>
</div>
<hr>
<div class="refsect2">
<a name="goo-canvas-polyline-model-new"></a><h3>goo_canvas_polyline_model_new ()</h3>
<pre class="programlisting"><a class="link" href="GooCanvasItemModel.html" title="GooCanvasItemModel"><span class="returnvalue">GooCanvasItemModel</span></a> * goo_canvas_polyline_model_new (<em class="parameter"><code><a class="link" href="GooCanvasItemModel.html" title="GooCanvasItemModel"><span class="type">GooCanvasItemModel</span></a> *parent</code></em>,
<em class="parameter"><code><span class="type">gboolean</span> close_path</code></em>,
<em class="parameter"><code><span class="type">gint</span> num_points</code></em>,
<em class="parameter"><code>...</code></em>);</pre>
<p>
Creates a new polyline model.
</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>parent</code></em> :</span></p></td>
<td>the parent model, or <code class="literal">NULL</code>. If a parent is specified, it will
assume ownership of the item, and the item will automatically be freed when
it is removed from the parent. Otherwise call <code class="function">g_object_unref()</code> to free it. <span class="annotation">[<acronym title="Exposed in C code, not necessarily available in other languages."><span class="acronym">skip</span></acronym>]</span>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>close_path</code></em> :</span></p></td>
<td>if the last point should be connected to the first.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>num_points</code></em> :</span></p></td>
<td>the number of points in the polyline.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>...</code></em> :</span></p></td>
<td>the pairs of coordinates for each point in the line, followed by
optional pairs of property names and values, and a terminating <code class="literal">NULL</code>.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>a new polyline model. <span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span>
</td>
</tr>
</tbody>
</table></div>
<p>
Here's an example showing how to create a filled triangle with vertices
at (100,100), (300,100), and (200,300).
</p>
<p>
</p>
<div class="informalexample">
<table class="listing_frame" border="0" cellpadding="0" cellspacing="0">
<tbody>
<tr>
<td class="listing_lines" align="right"><pre>1
2
3
4
5
6
7
8</pre></td>
<td class="listing_code"><pre class="programlisting"><span class="usertype">GooCanvasItemModel</span><span class="normal"> </span><span class="symbol">*</span><span class="normal">polyline </span><span class="symbol">=</span><span class="normal"> </span><span class="function"><a href="GooCanvasPolylineModel.html#goo-canvas-polyline-model-new">goo_canvas_polyline_model_new</a></span><span class="normal"> </span><span class="symbol">(</span><span class="normal">mygroup</span><span class="symbol">,</span><span class="normal"> TRUE</span><span class="symbol">,</span><span class="normal"> </span><span class="number">3</span><span class="symbol">,</span>
<span class="normal"> </span><span class="number">100.0</span><span class="symbol">,</span><span class="normal"> </span><span class="number">100.0</span><span class="symbol">,</span>
<span class="normal"> </span><span class="number">300.0</span><span class="symbol">,</span><span class="normal"> </span><span class="number">100.0</span><span class="symbol">,</span>
<span class="normal"> </span><span class="number">200.0</span><span class="symbol">,</span><span class="normal"> </span><span class="number">300.0</span><span class="symbol">,</span>
<span class="normal"> </span><span class="string">"stroke-color"</span><span class="symbol">,</span><span class="normal"> </span><span class="string">"red"</span><span class="symbol">,</span>
<span class="normal"> </span><span class="string">"line-width"</span><span class="symbol">,</span><span class="normal"> </span><span class="number">5.0</span><span class="symbol">,</span>
<span class="normal"> </span><span class="string">"fill-color"</span><span class="symbol">,</span><span class="normal"> </span><span class="string">"blue"</span><span class="symbol">,</span>
<span class="normal"> NULL</span><span class="symbol">);</span></pre></td>
</tr>
</tbody>
</table>
</div>
<p>
</p>
</div>
<hr>
<div class="refsect2">
<a name="goo-canvas-polyline-model-new-line"></a><h3>goo_canvas_polyline_model_new_line ()</h3>
<pre class="programlisting"><a class="link" href="GooCanvasItemModel.html" title="GooCanvasItemModel"><span class="returnvalue">GooCanvasItemModel</span></a> * goo_canvas_polyline_model_new_line (<em class="parameter"><code><a class="link" href="GooCanvasItemModel.html" title="GooCanvasItemModel"><span class="type">GooCanvasItemModel</span></a> *parent</code></em>,
<em class="parameter"><code><span class="type">gdouble</span> x1</code></em>,
<em class="parameter"><code><span class="type">gdouble</span> y1</code></em>,
<em class="parameter"><code><span class="type">gdouble</span> x2</code></em>,
<em class="parameter"><code><span class="type">gdouble</span> y2</code></em>,
<em class="parameter"><code>...</code></em>);</pre>
<p>
Creates a new polyline model with a single line.
</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>parent</code></em> :</span></p></td>
<td>the parent model, or <code class="literal">NULL</code>. <span class="annotation">[<acronym title="Exposed in C code, not necessarily available in other languages."><span class="acronym">skip</span></acronym>]</span>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>x1</code></em> :</span></p></td>
<td>the x coordinate of the start of the line.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>y1</code></em> :</span></p></td>
<td>the y coordinate of the start of the line.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>x2</code></em> :</span></p></td>
<td>the x coordinate of the end of the line.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>y2</code></em> :</span></p></td>
<td>the y coordinate of the end of the line.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>...</code></em> :</span></p></td>
<td>optional pairs of property names and values, and a terminating <code class="literal">NULL</code>.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>a new polyline model. <span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span>
</td>
</tr>
</tbody>
</table></div>
<p>
Here's an example showing how to create a line from (100,100) to (300,300).
</p>
<p>
</p>
<div class="informalexample">
<table class="listing_frame" border="0" cellpadding="0" cellspacing="0">
<tbody>
<tr>
<td class="listing_lines" align="right"><pre>1
2
3
4
5
6</pre></td>
<td class="listing_code"><pre class="programlisting"><span class="usertype">GooCanvasItemModel</span><span class="normal"> </span><span class="symbol">*</span><span class="normal">polyline </span><span class="symbol">=</span><span class="normal"> </span><span class="function"><a href="GooCanvasPolylineModel.html#goo-canvas-polyline-model-new-line">goo_canvas_polyline_model_new_line</a></span><span class="normal"> </span><span class="symbol">(</span><span class="normal">mygroup</span><span class="symbol">,</span>
<span class="normal"> </span><span class="number">100.0</span><span class="symbol">,</span><span class="normal"> </span><span class="number">100.0</span><span class="symbol">,</span>
<span class="normal"> </span><span class="number">300.0</span><span class="symbol">,</span><span class="normal"> </span><span class="number">300.0</span><span class="symbol">,</span>
<span class="normal"> </span><span class="string">"stroke-color"</span><span class="symbol">,</span><span class="normal"> </span><span class="string">"red"</span><span class="symbol">,</span>
<span class="normal"> </span><span class="string">"line-width"</span><span class="symbol">,</span><span class="normal"> </span><span class="number">5.0</span><span class="symbol">,</span>
<span class="normal"> NULL</span><span class="symbol">);</span></pre></td>
</tr>
</tbody>
</table>
</div>
<p>
</p>
</div>
</div>
<div class="refsect1">
<a name="GooCanvasPolylineModel.property-details"></a><h2>Property Details</h2>
<div class="refsect2">
<a name="GooCanvasPolylineModel--arrow-length"></a><h3>The <code class="literal">"arrow-length"</code> property</h3>
<pre class="programlisting"> "arrow-length" <span class="type">gdouble</span> : Read / Write</pre>
<p>The length of the arrows, as a multiple of the line width.</p>
<p>Allowed values: >= 0</p>
<p>Default value: 5</p>
</div>
<hr>
<div class="refsect2">
<a name="GooCanvasPolylineModel--arrow-tip-length"></a><h3>The <code class="literal">"arrow-tip-length"</code> property</h3>
<pre class="programlisting"> "arrow-tip-length" <span class="type">gdouble</span> : Read / Write</pre>
<p>The length of the arrow tip, as a multiple of the line width.</p>
<p>Allowed values: >= 0</p>
<p>Default value: 4</p>
</div>
<hr>
<div class="refsect2">
<a name="GooCanvasPolylineModel--arrow-width"></a><h3>The <code class="literal">"arrow-width"</code> property</h3>
<pre class="programlisting"> "arrow-width" <span class="type">gdouble</span> : Read / Write</pre>
<p>The width of the arrows, as a multiple of the line width.</p>
<p>Allowed values: >= 0</p>
<p>Default value: 4</p>
</div>
<hr>
<div class="refsect2">
<a name="GooCanvasPolylineModel--close-path"></a><h3>The <code class="literal">"close-path"</code> property</h3>
<pre class="programlisting"> "close-path" <span class="type">gboolean</span> : Read / Write</pre>
<p>If the last point should be connected to the first.</p>
<p>Default value: FALSE</p>
</div>
<hr>
<div class="refsect2">
<a name="GooCanvasPolylineModel--end-arrow"></a><h3>The <code class="literal">"end-arrow"</code> property</h3>
<pre class="programlisting"> "end-arrow" <span class="type">gboolean</span> : Read / Write</pre>
<p>If an arrow should be displayed at the end of the polyline.</p>
<p>Default value: FALSE</p>
</div>
<hr>
<div class="refsect2">
<a name="GooCanvasPolylineModel--height"></a><h3>The <code class="literal">"height"</code> property</h3>
<pre class="programlisting"> "height" <span class="type">gdouble</span> : Read / Write</pre>
<p>The height of the polyline.</p>
<p>Allowed values: >= 0</p>
<p>Default value: 0</p>
</div>
<hr>
<div class="refsect2">
<a name="GooCanvasPolylineModel--points"></a><h3>The <code class="literal">"points"</code> property</h3>
<pre class="programlisting"> "points" <a class="link" href="goocanvas2-GooCanvas-Types.html#GooCanvasPoints"><span class="type">GooCanvasPoints</span></a>* : Read / Write</pre>
<p>The array of points.</p>
</div>
<hr>
<div class="refsect2">
<a name="GooCanvasPolylineModel--start-arrow"></a><h3>The <code class="literal">"start-arrow"</code> property</h3>
<pre class="programlisting"> "start-arrow" <span class="type">gboolean</span> : Read / Write</pre>
<p>If an arrow should be displayed at the start of the polyline.</p>
<p>Default value: FALSE</p>
</div>
<hr>
<div class="refsect2">
<a name="GooCanvasPolylineModel--width"></a><h3>The <code class="literal">"width"</code> property</h3>
<pre class="programlisting"> "width" <span class="type">gdouble</span> : Read / Write</pre>
<p>The width of the polyline.</p>
<p>Allowed values: >= 0</p>
<p>Default value: 0</p>
</div>
<hr>
<div class="refsect2">
<a name="GooCanvasPolylineModel--x"></a><h3>The <code class="literal">"x"</code> property</h3>
<pre class="programlisting"> "x" <span class="type">gdouble</span> : Read / Write</pre>
<p>The x coordinate of the left-most point of the polyline.</p>
<p>Default value: 0</p>
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<div class="refsect2">
<a name="GooCanvasPolylineModel--y"></a><h3>The <code class="literal">"y"</code> property</h3>
<pre class="programlisting"> "y" <span class="type">gdouble</span> : Read / Write</pre>
<p>The y coordinate of the top-most point of the polyline.</p>
<p>Default value: 0</p>
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