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<div class="refentry">
<a name="WnckClassGroup"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="WnckClassGroup.top_of_page"></a>WnckClassGroup</span></h2>
<p>WnckClassGroup — an object representing a group of windows of the same
class.</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="WnckClassGroup.stability-level"></a><h2>Stability Level</h2>
<acronym title="Unstable interfaces are experimental or transitional. They are typically used to
give outside developers early access to new or rapidly changing technology, or
to provide an interim solution to a problem where a more general solution is
anticipated. No claims are made about either source or binary compatibility from
one minor release to the next.

The Unstable interface level is a warning that these interfaces are  subject to
change without warning and should not be used in unbundled products.

Given such caveats, customer impact need not be a factor when considering
incompatible changes to an Unstable interface in a major or minor release.
Nonetheless, when such changes are introduced, the changes should still be
mentioned in the release notes for the affected release.
"><span class="acronym">Unstable</span></acronym>, unless otherwise indicated
</div>
<div class="refsect1">
<a name="WnckClassGroup.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">
<a class="link" href="WnckClassGroup.html" title="WnckClassGroup"><span class="returnvalue">WnckClassGroup</span></a> *
</td>
<td class="function_name">
<a class="link" href="WnckClassGroup.html#wnck-class-group-get" title="wnck_class_group_get ()">wnck_class_group_get</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">const <span class="returnvalue">char</span> *
</td>
<td class="function_name">
<a class="link" href="WnckClassGroup.html#wnck-class-group-get-id" title="wnck_class_group_get_id ()">wnck_class_group_get_id</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">const <span class="returnvalue">char</span> *
</td>
<td class="function_name">
<a class="link" href="WnckClassGroup.html#wnck-class-group-get-res-class" title="wnck_class_group_get_res_class ()">wnck_class_group_get_res_class</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">const <span class="returnvalue">char</span> *
</td>
<td class="function_name">
<a class="link" href="WnckClassGroup.html#wnck-class-group-get-name" title="wnck_class_group_get_name ()">wnck_class_group_get_name</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">GdkPixbuf</span> *
</td>
<td class="function_name">
<a class="link" href="WnckClassGroup.html#wnck-class-group-get-icon" title="wnck_class_group_get_icon ()">wnck_class_group_get_icon</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">GdkPixbuf</span> *
</td>
<td class="function_name">
<a class="link" href="WnckClassGroup.html#wnck-class-group-get-mini-icon" title="wnck_class_group_get_mini_icon ()">wnck_class_group_get_mini_icon</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">GList</span> *
</td>
<td class="function_name">
<a class="link" href="WnckClassGroup.html#wnck-class-group-get-windows" title="wnck_class_group_get_windows ()">wnck_class_group_get_windows</a> <span class="c_punctuation">()</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="WnckClassGroup.signals"></a><h2>Signals</h2>
<div class="informaltable"><table class="informaltable" border="0">
<colgroup>
<col width="150px" class="signals_return">
<col width="300px" class="signals_name">
<col width="200px" class="signals_flags">
</colgroup>
<tbody>
<tr>
<td class="signal_type"><span class="returnvalue">void</span></td>
<td class="signal_name"><a class="link" href="WnckClassGroup.html#WnckClassGroup-icon-changed" title="The “icon-changed” signal">icon-changed</a></td>
<td class="signal_flags">Run Last</td>
</tr>
<tr>
<td class="signal_type"><span class="returnvalue">void</span></td>
<td class="signal_name"><a class="link" href="WnckClassGroup.html#WnckClassGroup-name-changed" title="The “name-changed” signal">name-changed</a></td>
<td class="signal_flags">Run Last</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="WnckClassGroup.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"> </td>
<td class="function_name"><a class="link" href="WnckClassGroup.html#WnckClassGroup-struct" title="WnckClassGroup">WnckClassGroup</a></td>
</tr></tbody>
</table></div>
</div>
<div class="refsect1">
<a name="WnckClassGroup.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="screen">    GObject
    <span class="lineart">╰──</span> WnckClassGroup
</pre>
</div>
<div class="refsect1">
<a name="WnckClassGroup.includes"></a><h2>Includes</h2>
<pre class="synopsis">#include &lt;libwnck/libwnck.h&gt;
</pre>
</div>
<div class="refsect1">
<a name="WnckClassGroup.description"></a><h2>Description</h2>
<p>The <a class="link" href="WnckClassGroup.html" title="WnckClassGroup"><span class="type">WnckClassGroup</span></a> is a group of <a class="link" href="WnckWindow.html" title="WnckWindow"><span class="type">WnckWindow</span></a> that are all in the same
class. It can be used to represent windows by classes, group windows by
classes or to manipulate all windows of a particular class.</p>
<p>The class of a window is defined by the WM_CLASS property of this window.
More information about the WM_CLASS property is available in the <a class="ulink" href="http://tronche.com/gui/x/icccm/sec-4.html#s-4.1.2.5" target="_top">WM_CLASS Property</a>
section (section 4.1.2.5) of the <a class="ulink" href="http://tronche.com/gui/x/icccm/" target="_top">ICCCM</a>.</p>
<p>The <a class="link" href="WnckClassGroup.html" title="WnckClassGroup"><span class="type">WnckClassGroup</span></a> objects are always owned by libwnck and must not be
referenced or unreferenced.</p>
</div>
<div class="refsect1">
<a name="WnckClassGroup.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="wnck-class-group-get"></a><h3>wnck_class_group_get ()</h3>
<pre class="programlisting"><a class="link" href="WnckClassGroup.html" title="WnckClassGroup"><span class="returnvalue">WnckClassGroup</span></a> *
wnck_class_group_get (<em class="parameter"><code>const <span class="type">char</span> *id</code></em>);</pre>
<p>Gets the <a class="link" href="WnckClassGroup.html" title="WnckClassGroup"><span class="type">WnckClassGroup</span></a> corresponding to <em class="parameter"><code>id</code></em>
.</p>
<div class="refsect3">
<a name="wnck-class-group-get.parameters"></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>id</p></td>
<td class="parameter_description"><p>identifier name of the sought resource class.</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="wnck-class-group-get.returns"></a><h4>Returns</h4>
<p> the <a class="link" href="WnckClassGroup.html" title="WnckClassGroup"><span class="type">WnckClassGroup</span></a> corresponding to
<em class="parameter"><code>id</code></em>
, or <code class="literal">NULL</code> if there is no <a class="link" href="WnckClassGroup.html" title="WnckClassGroup"><span class="type">WnckClassGroup</span></a> with the specified
<em class="parameter"><code>id</code></em>
. The returned <a class="link" href="WnckClassGroup.html" title="WnckClassGroup"><span class="type">WnckClassGroup</span></a> is owned by libwnck and must not be
referenced or unreferenced. </p>
<p><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></p>
</div>
<p class="since">Since: 2.2</p>
</div>
<hr>
<div class="refsect2">
<a name="wnck-class-group-get-id"></a><h3>wnck_class_group_get_id ()</h3>
<pre class="programlisting">const <span class="returnvalue">char</span> *
wnck_class_group_get_id (<em class="parameter"><code><a class="link" href="WnckClassGroup.html" title="WnckClassGroup"><span class="type">WnckClassGroup</span></a> *class_group</code></em>);</pre>
<p>Gets the identifier name for <em class="parameter"><code>class_group</code></em>
. This is the resource class for
<em class="parameter"><code>class_group</code></em>
.</p>
<div class="refsect3">
<a name="wnck-class-group-get-id.parameters"></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>class_group</p></td>
<td class="parameter_description"><p>a <a class="link" href="WnckClassGroup.html" title="WnckClassGroup"><span class="type">WnckClassGroup</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="wnck-class-group-get-id.returns"></a><h4>Returns</h4>
<p> the identifier name of <em class="parameter"><code>class_group</code></em>
, or an
empty string if the group has no identifier name.</p>
</div>
<p class="since">Since: 3.2</p>
</div>
<hr>
<div class="refsect2">
<a name="wnck-class-group-get-res-class"></a><h3>wnck_class_group_get_res_class ()</h3>
<pre class="programlisting">const <span class="returnvalue">char</span> *
wnck_class_group_get_res_class (<em class="parameter"><code><a class="link" href="WnckClassGroup.html" title="WnckClassGroup"><span class="type">WnckClassGroup</span></a> *class_group</code></em>);</pre>
<div class="warning">
<p><code class="literal">wnck_class_group_get_res_class</code> has been deprecated since version 3.2 and should not be used in newly-written code.</p>
<p>Use <a class="link" href="WnckClassGroup.html#wnck-class-group-get-id" title="wnck_class_group_get_id ()"><code class="function">wnck_class_group_get_id()</code></a> instead.</p>
</div>
<p>Gets the resource class name for <em class="parameter"><code>class_group</code></em>
.</p>
<div class="refsect3">
<a name="wnck-class-group-get-res-class.parameters"></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>class_group</p></td>
<td class="parameter_description"><p>a <a class="link" href="WnckClassGroup.html" title="WnckClassGroup"><span class="type">WnckClassGroup</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="wnck-class-group-get-res-class.returns"></a><h4>Returns</h4>
<p> the resource class name of <em class="parameter"><code>class_group</code></em>
, or an
empty string if the group has no resource class name.</p>
</div>
<p class="since">Since: 2.2</p>
</div>
<hr>
<div class="refsect2">
<a name="wnck-class-group-get-name"></a><h3>wnck_class_group_get_name ()</h3>
<pre class="programlisting">const <span class="returnvalue">char</span> *
wnck_class_group_get_name (<em class="parameter"><code><a class="link" href="WnckClassGroup.html" title="WnckClassGroup"><span class="type">WnckClassGroup</span></a> *class_group</code></em>);</pre>
<p>Gets an human-readable name for <em class="parameter"><code>class_group</code></em>
. Since there is no way to
properly find this name, a suboptimal heuristic is used to find it. The name
is the name of all <a class="link" href="WnckApplication.html" title="WnckApplication"><span class="type">WnckApplication</span></a> for each <a class="link" href="WnckWindow.html" title="WnckWindow"><span class="type">WnckWindow</span></a> in <em class="parameter"><code>class_group</code></em>
 if
they all have the same name. If all <a class="link" href="WnckApplication.html" title="WnckApplication"><span class="type">WnckApplication</span></a> don't have the same
name, the name is the name of all <a class="link" href="WnckWindow.html" title="WnckWindow"><span class="type">WnckWindow</span></a> in <em class="parameter"><code>class_group</code></em>
 if they all
have the same name. If all <a class="link" href="WnckWindow.html" title="WnckWindow"><span class="type">WnckWindow</span></a> don't have the same name, the
resource class name is used.</p>
<div class="refsect3">
<a name="wnck-class-group-get-name.parameters"></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>class_group</p></td>
<td class="parameter_description"><p>a <a class="link" href="WnckClassGroup.html" title="WnckClassGroup"><span class="type">WnckClassGroup</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="wnck-class-group-get-name.returns"></a><h4>Returns</h4>
<p> an human-readable name for <em class="parameter"><code>class_group</code></em>
.</p>
</div>
<p class="since">Since: 2.2</p>
</div>
<hr>
<div class="refsect2">
<a name="wnck-class-group-get-icon"></a><h3>wnck_class_group_get_icon ()</h3>
<pre class="programlisting"><span class="returnvalue">GdkPixbuf</span> *
wnck_class_group_get_icon (<em class="parameter"><code><a class="link" href="WnckClassGroup.html" title="WnckClassGroup"><span class="type">WnckClassGroup</span></a> *class_group</code></em>);</pre>
<p>Gets the icon to be used for <em class="parameter"><code>class_group</code></em>
. Since there is no way to
properly find the icon, a suboptimal heuristic is used to find it. The icon
is the first icon found by looking at all the <a class="link" href="WnckApplication.html" title="WnckApplication"><span class="type">WnckApplication</span></a> for each
<a class="link" href="WnckWindow.html" title="WnckWindow"><span class="type">WnckWindow</span></a> in <em class="parameter"><code>class_group</code></em>
, then at all the <a class="link" href="WnckWindow.html" title="WnckWindow"><span class="type">WnckWindow</span></a> in <em class="parameter"><code>class_group</code></em>
. If
no icon was found, a fallback icon is used.</p>
<div class="refsect3">
<a name="wnck-class-group-get-icon.parameters"></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>class_group</p></td>
<td class="parameter_description"><p>a <a class="link" href="WnckClassGroup.html" title="WnckClassGroup"><span class="type">WnckClassGroup</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="wnck-class-group-get-icon.returns"></a><h4>Returns</h4>
<p> the icon for <em class="parameter"><code>class_group</code></em>
. The caller should
reference the returned <code class="classname">GdkPixbuf</code> if it needs to keep
the icon around. </p>
<p><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></p>
</div>
<p class="since">Since: 2.2</p>
</div>
<hr>
<div class="refsect2">
<a name="wnck-class-group-get-mini-icon"></a><h3>wnck_class_group_get_mini_icon ()</h3>
<pre class="programlisting"><span class="returnvalue">GdkPixbuf</span> *
wnck_class_group_get_mini_icon (<em class="parameter"><code><a class="link" href="WnckClassGroup.html" title="WnckClassGroup"><span class="type">WnckClassGroup</span></a> *class_group</code></em>);</pre>
<p>Gets the mini-icon to be used for <em class="parameter"><code>class_group</code></em>
. Since there is no way to
properly find the mini-icon, the same suboptimal heuristic as the one for
<a class="link" href="WnckClassGroup.html#wnck-class-group-get-icon" title="wnck_class_group_get_icon ()"><code class="function">wnck_class_group_get_icon()</code></a> is used to find it.</p>
<div class="refsect3">
<a name="wnck-class-group-get-mini-icon.parameters"></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>class_group</p></td>
<td class="parameter_description"><p>a <a class="link" href="WnckClassGroup.html" title="WnckClassGroup"><span class="type">WnckClassGroup</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="wnck-class-group-get-mini-icon.returns"></a><h4>Returns</h4>
<p> the mini-icon for <em class="parameter"><code>class_group</code></em>
. The caller
should reference the returned <code class="classname">GdkPixbuf</code> if it needs
to keep the mini-icon around. </p>
<p><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></p>
</div>
<p class="since">Since: 2.2</p>
</div>
<hr>
<div class="refsect2">
<a name="wnck-class-group-get-windows"></a><h3>wnck_class_group_get_windows ()</h3>
<pre class="programlisting"><span class="returnvalue">GList</span> *
wnck_class_group_get_windows (<em class="parameter"><code><a class="link" href="WnckClassGroup.html" title="WnckClassGroup"><span class="type">WnckClassGroup</span></a> *class_group</code></em>);</pre>
<p>Gets the list of <a class="link" href="WnckWindow.html" title="WnckWindow"><span class="type">WnckWindow</span></a> that are grouped in <em class="parameter"><code>class_group</code></em>
.</p>
<div class="refsect3">
<a name="wnck-class-group-get-windows.parameters"></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>class_group</p></td>
<td class="parameter_description"><p>a <a class="link" href="WnckClassGroup.html" title="WnckClassGroup"><span class="type">WnckClassGroup</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="wnck-class-group-get-windows.returns"></a><h4>Returns</h4>
<p> the list of
<a class="link" href="WnckWindow.html" title="WnckWindow"><span class="type">WnckWindow</span></a> grouped in <em class="parameter"><code>class_group</code></em>
, or <code class="literal">NULL</code> if the group contains no
window. The list should not be modified nor freed, as it is owned by
<em class="parameter"><code>class_group</code></em>
. </p>
<p><span class="annotation">[<acronym title="Generics and defining elements of containers and arrays."><span class="acronym">element-type</span></acronym> WnckWindow][<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></p>
</div>
<p class="since">Since: 2.2</p>
</div>
</div>
<div class="refsect1">
<a name="WnckClassGroup.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="WnckClassGroup-struct"></a><h3>WnckClassGroup</h3>
<pre class="programlisting">typedef struct _WnckClassGroup WnckClassGroup;</pre>
<p>The <a class="link" href="WnckClassGroup.html" title="WnckClassGroup"><span class="type">WnckClassGroup</span></a> struct contains only private fields and should not be
directly accessed.</p>
</div>
</div>
<div class="refsect1">
<a name="WnckClassGroup.signal-details"></a><h2>Signal Details</h2>
<div class="refsect2">
<a name="WnckClassGroup-icon-changed"></a><h3>The <code class="literal">“icon-changed”</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
user_function (<a class="link" href="WnckClassGroup.html" title="WnckClassGroup"><span class="type">WnckClassGroup</span></a> *class_group,
               <span class="type">gpointer</span>        user_data)</pre>
<p>Emitted when the icon of <em class="parameter"><code>class_group</code></em>
 changes.</p>
<div class="refsect3">
<a name="WnckClassGroup-icon-changed.parameters"></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>class_group</p></td>
<td class="parameter_description"><p>the <a class="link" href="WnckClassGroup.html" title="WnckClassGroup"><span class="type">WnckClassGroup</span></a> which emitted the signal.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>user data set when the signal handler was connected.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p>Flags: Run Last</p>
</div>
<hr>
<div class="refsect2">
<a name="WnckClassGroup-name-changed"></a><h3>The <code class="literal">“name-changed”</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
user_function (<a class="link" href="WnckClassGroup.html" title="WnckClassGroup"><span class="type">WnckClassGroup</span></a> *class_group,
               <span class="type">gpointer</span>        user_data)</pre>
<p>Emitted when the name of <em class="parameter"><code>class_group</code></em>
 changes.</p>
<div class="refsect3">
<a name="WnckClassGroup-name-changed.parameters"></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>class_group</p></td>
<td class="parameter_description"><p>the <a class="link" href="WnckClassGroup.html" title="WnckClassGroup"><span class="type">WnckClassGroup</span></a> which emitted the signal.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>user data set when the signal handler was connected.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p>Flags: Run Last</p>
</div>
</div>
<div class="refsect1">
<a name="WnckClassGroup.see-also"></a><h2>See Also</h2>
<p>wnck_window_get_class_group()</p>
</div>
</div>
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