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<h2><span class="refentrytitle"><a name="EExtension.top_of_page"></a>EExtension</span></h2>
<p>EExtension — An abstract base class for extensions</p>
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<div class="refsect1">
<a name="EExtension.functions"></a><h2>Functions</h2>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="functions_return">
<col class="functions_name">
</colgroup>
<tbody><tr>
<td class="function_type">
<a class="link" href="EExtensible.html" title="EExtensible"><span class="returnvalue">EExtensible</span></a> *
</td>
<td class="function_name">
<a class="link" href="EExtension.html#e-extension-get-extensible" title="e_extension_get_extensible ()">e_extension_get_extensible</a> <span class="c_punctuation">()</span>
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<div class="refsect1">
<a name="EExtension.properties"></a><h2>Properties</h2>
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<col width="150px" class="properties_type">
<col width="300px" class="properties_name">
<col width="200px" class="properties_flags">
</colgroup>
<tbody><tr>
<td class="property_type">
<a class="link" href="EExtensible.html" title="EExtensible"><span class="type">EExtensible</span></a> *</td>
<td class="property_name"><a class="link" href="EExtension.html#EExtension--extensible" title="The “extensible” property">extensible</a></td>
<td class="property_flags">Read / Write / Construct Only</td>
</tr></tbody>
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<div class="refsect1">
<a name="EExtension.other"></a><h2>Types and Values</h2>
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<col width="150px" class="name">
<col class="description">
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<td class="datatype_keyword">struct</td>
<td class="function_name"><a class="link" href="EExtension.html#EExtension-struct" title="struct EExtension">EExtension</a></td>
</tr></tbody>
</table></div>
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<div class="refsect1">
<a name="EExtension.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="screen"> <a href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GObject">GObject</a>
<span class="lineart">╰──</span> EExtension
<span class="lineart">├──</span> <a class="link" href="EBackendFactory.html" title="EBackendFactory">EBackendFactory</a>
<span class="lineart">╰──</span> <a class="link" href="EUserPrompterServerExtension.html" title="EUserPrompterServerExtension">EUserPrompterServerExtension</a>
</pre>
</div>
<div class="refsect1">
<a name="EExtension.includes"></a><h2>Includes</h2>
<pre class="synopsis">#include <libebackend/libebackend.h>
</pre>
</div>
<div class="refsect1">
<a name="EExtension.description"></a><h2>Description</h2>
<p><a class="link" href="EExtension.html" title="EExtension"><span class="type">EExtension</span></a> provides a way to extend the functionality of objects
that implement the <a class="link" href="EExtensible.html" title="EExtensible"><span class="type">EExtensible</span></a> interface. <a class="link" href="EExtension.html" title="EExtension"><span class="type">EExtension</span></a> subclasses
can target a particular extensible object type. New instances of
an extensible object type get paired with a new instance of each
<a class="link" href="EExtension.html" title="EExtension"><span class="type">EExtension</span></a> subclass that targets the extensible object type.</p>
<p>The first steps of writing a new extension are as follows:</p>
<div class="orderedlist"><ol class="orderedlist" type="1">
<li class="listitem"><p>Subclass <a class="link" href="EExtension.html" title="EExtension"><span class="type">EExtension</span></a>.</p></li>
<li class="listitem"><p>In the class initialization function, specify the <a href="/usr/share/gtk-doc/html/gobject/gobject-Type-Information.html#GType"><span class="type">GType</span></a> being
extended. The <a href="/usr/share/gtk-doc/html/gobject/gobject-Type-Information.html#GType"><span class="type">GType</span></a> must implement the <a class="link" href="EExtensible.html" title="EExtensible"><span class="type">EExtensible</span></a> interface.</p></li>
<li class="listitem"><p>Register the extension's own <a href="/usr/share/gtk-doc/html/gobject/gobject-Type-Information.html#GType"><span class="type">GType</span></a>. If the extension is to
be loaded dynamically using <a href="/usr/share/gtk-doc/html/gobject/GTypeModule.html"><span class="type">GTypeModule</span></a>, the type should be
registered in the library module's <code class="function">e_module_load()</code> function.</p></li>
</ol></div>
</div>
<div class="refsect1">
<a name="EExtension.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="e-extension-get-extensible"></a><h3>e_extension_get_extensible ()</h3>
<pre class="programlisting"><a class="link" href="EExtensible.html" title="EExtensible"><span class="returnvalue">EExtensible</span></a> *
e_extension_get_extensible (<em class="parameter"><code><a class="link" href="EExtension.html" title="EExtension"><span class="type">EExtension</span></a> *extension</code></em>);</pre>
<p>Returns the object that <em class="parameter"><code>extension</code></em>
extends.</p>
<div class="refsect3">
<a name="id-1.2.7.9.2.5"></a><h4>Parameters</h4>
<div class="informaltable"><table 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>extension</p></td>
<td class="parameter_description"><p>an <a class="link" href="EExtension.html" title="EExtension"><span class="type">EExtension</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.7.9.2.6"></a><h4>Returns</h4>
<p> the object being extended</p>
<p></p>
</div>
<p class="since">Since 3.4</p>
</div>
</div>
<div class="refsect1">
<a name="EExtension.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="EExtension-struct"></a><h3>struct EExtension</h3>
<pre class="programlisting">struct EExtension;</pre>
<p>Contains only private data that should be read and manipulated using the
functions below.</p>
<p class="since">Since 3.4</p>
</div>
</div>
<div class="refsect1">
<a name="EExtension.property-details"></a><h2>Property Details</h2>
<div class="refsect2">
<a name="EExtension--extensible"></a><h3>The <code class="literal">“extensible”</code> property</h3>
<pre class="programlisting"> “extensible” <a class="link" href="EExtensible.html" title="EExtensible"><span class="type">EExtensible</span></a> *</pre>
<p>The object being extended.</p>
<p>Flags: Read / Write / Construct Only</p>
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