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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>ChamplainLayer: libchamplain Reference Manual</title>
<meta name="generator" content="DocBook XSL Stylesheets V1.79.1">
<link rel="home" href="index.html" title="libchamplain Reference Manual">
<link rel="up" href="ch01.html" title="Layers">
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<link rel="next" href="ChamplainMarkerLayer.html" title="ChamplainMarkerLayer">
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<td width="100%" align="left" class="shortcuts">
<a href="#" class="shortcut">Top</a><span id="nav_description">  <span class="dim">|</span> 
                  <a href="#ChamplainLayer.description" class="shortcut">Description</a></span><span id="nav_hierarchy">  <span class="dim">|</span> 
                  <a href="#ChamplainLayer.object-hierarchy" class="shortcut">Object Hierarchy</a></span><span id="nav_interfaces">  <span class="dim">|</span> 
                  <a href="#ChamplainLayer.implemented-interfaces" class="shortcut">Implemented Interfaces</a></span>
</td>
<td><a accesskey="h" href="index.html"><img src="home.png" width="16" height="16" border="0" alt="Home"></a></td>
<td><a accesskey="u" href="ch01.html"><img src="up.png" width="16" height="16" border="0" alt="Up"></a></td>
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</tr></table>
<div class="refentry">
<a name="ChamplainLayer"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="ChamplainLayer.top_of_page"></a>ChamplainLayer</span></h2>
<p>ChamplainLayer — Base class of libchamplain layers</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="ChamplainLayer.functions"></a><h2>Functions</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="functions_return">
<col class="functions_name">
</colgroup>
<tbody>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="ChamplainLayer.html#champlain-layer-set-view" title="champlain_layer_set_view ()">champlain_layer_set_view</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="ChamplainBoundingBox.html" title="ChamplainBoundingBox"><span class="returnvalue">ChamplainBoundingBox</span></a> *
</td>
<td class="function_name">
<a class="link" href="ChamplainLayer.html#champlain-layer-get-bounding-box" title="champlain_layer_get_bounding_box ()">champlain_layer_get_bounding_box</a> <span class="c_punctuation">()</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="ChamplainLayer.other"></a><h2>Types and Values</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="name">
<col class="description">
</colgroup>
<tbody><tr>
<td class="datatype_keyword">struct</td>
<td class="function_name"><a class="link" href="ChamplainLayer.html#ChamplainLayer-struct" title="struct ChamplainLayer">ChamplainLayer</a></td>
</tr></tbody>
</table></div>
</div>
<div class="refsect1">
<a name="ChamplainLayer.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="screen">    GObject
    <span class="lineart">╰──</span> GInitiallyUnowned
        <span class="lineart">╰──</span> ClutterActor
            <span class="lineart">╰──</span> ChamplainLayer
                <span class="lineart">├──</span> <a class="link" href="ChamplainMarkerLayer.html" title="ChamplainMarkerLayer">ChamplainMarkerLayer</a>
                <span class="lineart">╰──</span> <a class="link" href="ChamplainPathLayer.html" title="ChamplainPathLayer">ChamplainPathLayer</a>
</pre>
</div>
<div class="refsect1">
<a name="ChamplainLayer.implemented-interfaces"></a><h2>Implemented Interfaces</h2>
<p>
ChamplainLayer implements
 ClutterContainer,  ClutterScriptable,  ClutterAnimatable and  AtkImplementorIface.</p>
</div>
<div class="refsect1">
<a name="ChamplainLayer.description"></a><h2>Description</h2>
<p>Every layer (overlay that moves together with the map) has to inherit this
class and implement its virtual methods.</p>
</div>
<div class="refsect1">
<a name="ChamplainLayer.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="champlain-layer-set-view"></a><h3>champlain_layer_set_view ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
champlain_layer_set_view (<em class="parameter"><code><a class="link" href="ChamplainLayer.html" title="ChamplainLayer"><span class="type">ChamplainLayer</span></a> *layer</code></em>,
                          <em class="parameter"><code><a class="link" href="ChamplainView.html" title="ChamplainView"><span class="type">ChamplainView</span></a> *view</code></em>);</pre>
<p><a class="link" href="ChamplainView.html" title="ChamplainView"><span class="type">ChamplainView</span></a> calls this method to pass a reference to itself to the layer
when the layer is added to the view. When the layer is removed from the
view, it passes NULL to the layer. Custom layers can implement this method
and perform the necessary initialization. This method should not be called
by user code.</p>
<div class="refsect3">
<a name="id-1.3.2.2.8.2.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>layer</p></td>
<td class="parameter_description"><p>a <a class="link" href="ChamplainLayer.html" title="ChamplainLayer"><span class="type">ChamplainLayer</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>view</p></td>
<td class="parameter_description"><p>a <a class="link" href="ChamplainView.html" title="ChamplainView"><span class="type">ChamplainView</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: 0.10</p>
</div>
<hr>
<div class="refsect2">
<a name="champlain-layer-get-bounding-box"></a><h3>champlain_layer_get_bounding_box ()</h3>
<pre class="programlisting"><a class="link" href="ChamplainBoundingBox.html" title="ChamplainBoundingBox"><span class="returnvalue">ChamplainBoundingBox</span></a> *
champlain_layer_get_bounding_box (<em class="parameter"><code><a class="link" href="ChamplainLayer.html" title="ChamplainLayer"><span class="type">ChamplainLayer</span></a> *layer</code></em>);</pre>
<p>Gets the bounding box occupied by the elements inside the layer.</p>
<div class="refsect3">
<a name="id-1.3.2.2.8.3.5"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>layer</p></td>
<td class="parameter_description"><p>a <a class="link" href="ChamplainLayer.html" title="ChamplainLayer"><span class="type">ChamplainLayer</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.3.2.2.8.3.6"></a><h4>Returns</h4>
<p> The bounding box.</p>
</div>
<p class="since">Since: 0.10</p>
</div>
</div>
<div class="refsect1">
<a name="ChamplainLayer.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="ChamplainLayer-struct"></a><h3>struct ChamplainLayer</h3>
<pre class="programlisting">struct ChamplainLayer;</pre>
<p>The <a class="link" href="ChamplainLayer.html" title="ChamplainLayer"><span class="type">ChamplainLayer</span></a> structure contains only private data
and should be accessed using the provided API</p>
<p class="since">Since: 0.10</p>
</div>
</div>
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