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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<title>GIO Reference Manual: GActionGroup</title>
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<a href="#GActionGroup.implementations" class="shortcut">Known Implementations</a></span><span id="nav_signals"> <span class="dim">|</span>
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<div class="refentry">
<a name="GActionGroup"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="GActionGroup.top_of_page"></a>GActionGroup</span></h2>
<p>GActionGroup — A group of actions</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="GActionGroup.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 href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> **
</td>
<td class="function_name">
<a class="link" href="GActionGroup.html#g-action-group-list-actions" title="g_action_group_list_actions ()">g_action_group_list_actions</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GActionGroup.html#g-action-group-query-action" title="g_action_group_query_action ()">g_action_group_query_action</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GActionGroup.html#g-action-group-has-action" title="g_action_group_has_action ()">g_action_group_has_action</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="GActionGroup.html#g-action-group-get-action-enabled" title="g_action_group_get_action_enabled ()">g_action_group_get_action_enabled</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">const <a href="https://developer.gnome.org/glib/unstable/glib-GVariantType.html#GVariantType"><span class="returnvalue">GVariantType</span></a> *
</td>
<td class="function_name">
<a class="link" href="GActionGroup.html#g-action-group-get-action-parameter-type" title="g_action_group_get_action_parameter_type ()">g_action_group_get_action_parameter_type</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">const <a href="https://developer.gnome.org/glib/unstable/glib-GVariantType.html#GVariantType"><span class="returnvalue">GVariantType</span></a> *
</td>
<td class="function_name">
<a class="link" href="GActionGroup.html#g-action-group-get-action-state-type" title="g_action_group_get_action_state_type ()">g_action_group_get_action_state_type</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="https://developer.gnome.org/glib/unstable/glib-GVariant.html#GVariant"><span class="returnvalue">GVariant</span></a> *
</td>
<td class="function_name">
<a class="link" href="GActionGroup.html#g-action-group-get-action-state-hint" title="g_action_group_get_action_state_hint ()">g_action_group_get_action_state_hint</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="https://developer.gnome.org/glib/unstable/glib-GVariant.html#GVariant"><span class="returnvalue">GVariant</span></a> *
</td>
<td class="function_name">
<a class="link" href="GActionGroup.html#g-action-group-get-action-state" title="g_action_group_get_action_state ()">g_action_group_get_action_state</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GActionGroup.html#g-action-group-change-action-state" title="g_action_group_change_action_state ()">g_action_group_change_action_state</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GActionGroup.html#g-action-group-activate-action" title="g_action_group_activate_action ()">g_action_group_activate_action</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GActionGroup.html#g-action-group-action-added" title="g_action_group_action_added ()">g_action_group_action_added</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GActionGroup.html#g-action-group-action-removed" title="g_action_group_action_removed ()">g_action_group_action_removed</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GActionGroup.html#g-action-group-action-enabled-changed" title="g_action_group_action_enabled_changed ()">g_action_group_action_enabled_changed</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="GActionGroup.html#g-action-group-action-state-changed" title="g_action_group_action_state_changed ()">g_action_group_action_state_changed</a> <span class="c_punctuation">()</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="GActionGroup.signals"></a><h2>Signals</h2>
<div class="informaltable"><table 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="GActionGroup.html#GActionGroup-action-added" title="The “action-added” signal">action-added</a></td>
<td class="signal_flags">Has Details</td>
</tr>
<tr>
<td class="signal_type"><span class="returnvalue">void</span></td>
<td class="signal_name"><a class="link" href="GActionGroup.html#GActionGroup-action-enabled-changed" title="The “action-enabled-changed” signal">action-enabled-changed</a></td>
<td class="signal_flags">Has Details</td>
</tr>
<tr>
<td class="signal_type"><span class="returnvalue">void</span></td>
<td class="signal_name"><a class="link" href="GActionGroup.html#GActionGroup-action-removed" title="The “action-removed” signal">action-removed</a></td>
<td class="signal_flags">Has Details</td>
</tr>
<tr>
<td class="signal_type"><span class="returnvalue">void</span></td>
<td class="signal_name"><a class="link" href="GActionGroup.html#GActionGroup-action-state-changed" title="The “action-state-changed” signal">action-state-changed</a></td>
<td class="signal_flags">Has Details</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="GActionGroup.other"></a><h2>Types and Values</h2>
<div class="informaltable"><table 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="GActionGroup.html#GActionGroup-struct" title="GActionGroup">GActionGroup</a></td>
</tr>
<tr>
<td class="datatype_keyword">struct</td>
<td class="function_name"><a class="link" href="GActionGroup.html#GActionGroupInterface" title="struct GActionGroupInterface">GActionGroupInterface</a></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="GActionGroup.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="screen"> <a href="https://developer.gnome.org/gobject/unstable/GTypeModule.html">GInterface</a>
<span class="lineart">╰──</span> GActionGroup
</pre>
</div>
<div class="refsect1">
<a name="GActionGroup.prerequisites"></a><h2>Prerequisites</h2>
<p>
GActionGroup requires
<a href="https://developer.gnome.org/gobject/unstable/gobject-The-Base-Object-Type.html#GObject">GObject</a>.</p>
</div>
<div class="refsect1">
<a name="GActionGroup.derived-interfaces"></a><h2>Known Derived Interfaces</h2>
<p>
GActionGroup is required by
<a class="link" href="GRemoteActionGroup.html" title="GRemoteActionGroup">GRemoteActionGroup</a>.</p>
</div>
<div class="refsect1">
<a name="GActionGroup.implementations"></a><h2>Known Implementations</h2>
<p>
GActionGroup is implemented by
<a class="link" href="GApplication.html" title="GApplication">GApplication</a>, <a class="link" href="GDBusActionGroup.html" title="GDBusActionGroup">GDBusActionGroup</a> and <a class="link" href="GSimpleActionGroup.html" title="GSimpleActionGroup">GSimpleActionGroup</a>.</p>
</div>
<div class="refsect1">
<a name="GActionGroup.includes"></a><h2>Includes</h2>
<pre class="synopsis">#include <gio/gio.h>
</pre>
</div>
<div class="refsect1">
<a name="GActionGroup.description"></a><h2>Description</h2>
<p><a class="link" href="GActionGroup.html" title="GActionGroup"><span class="type">GActionGroup</span></a> represents a group of actions. Actions can be used to
expose functionality in a structured way, either from one part of a
program to another, or to the outside world. Action groups are often
used together with a <a class="link" href="GMenuModel.html" title="GMenuModel"><span class="type">GMenuModel</span></a> that provides additional
representation data for displaying the actions to the user, e.g. in
a menu.</p>
<p>The main way to interact with the actions in a GActionGroup is to
activate them with <a class="link" href="GActionGroup.html#g-action-group-activate-action" title="g_action_group_activate_action ()"><code class="function">g_action_group_activate_action()</code></a>. Activating an
action may require a <a href="https://developer.gnome.org/glib/unstable/glib-GVariant.html#GVariant"><span class="type">GVariant</span></a> parameter. The required type of the
parameter can be inquired with <a class="link" href="GActionGroup.html#g-action-group-get-action-parameter-type" title="g_action_group_get_action_parameter_type ()"><code class="function">g_action_group_get_action_parameter_type()</code></a>.
Actions may be disabled, see <a class="link" href="GActionGroup.html#g-action-group-get-action-enabled" title="g_action_group_get_action_enabled ()"><code class="function">g_action_group_get_action_enabled()</code></a>.
Activating a disabled action has no effect.</p>
<p>Actions may optionally have a state in the form of a <a href="https://developer.gnome.org/glib/unstable/glib-GVariant.html#GVariant"><span class="type">GVariant</span></a>. The
current state of an action can be inquired with
<a class="link" href="GActionGroup.html#g-action-group-get-action-state" title="g_action_group_get_action_state ()"><code class="function">g_action_group_get_action_state()</code></a>. Activating a stateful action may
change its state, but it is also possible to set the state by calling
<a class="link" href="GActionGroup.html#g-action-group-change-action-state" title="g_action_group_change_action_state ()"><code class="function">g_action_group_change_action_state()</code></a>.</p>
<p>As typical example, consider a text editing application which has an
option to change the current font to 'bold'. A good way to represent
this would be a stateful action, with a boolean state. Activating the
action would toggle the state.</p>
<p>Each action in the group has a unique name (which is a string). All
method calls, except <a class="link" href="GActionGroup.html#g-action-group-list-actions" title="g_action_group_list_actions ()"><code class="function">g_action_group_list_actions()</code></a> take the name of
an action as an argument.</p>
<p>The <a class="link" href="GActionGroup.html" title="GActionGroup"><span class="type">GActionGroup</span></a> API is meant to be the 'public' API to the action
group. The calls here are exactly the interaction that 'external
forces' (eg: UI, incoming D-Bus messages, etc.) are supposed to have
with actions. 'Internal' APIs (ie: ones meant only to be accessed by
the action group implementation) are found on subclasses. This is
why you will find - for example - <a class="link" href="GActionGroup.html#g-action-group-get-action-enabled" title="g_action_group_get_action_enabled ()"><code class="function">g_action_group_get_action_enabled()</code></a>
but not an equivalent <code class="function">set()</code> call.</p>
<p>Signals are emitted on the action group in response to state changes
on individual actions.</p>
<p>Implementations of <a class="link" href="GActionGroup.html" title="GActionGroup"><span class="type">GActionGroup</span></a> should provide implementations for
the virtual functions <a class="link" href="GActionGroup.html#g-action-group-list-actions" title="g_action_group_list_actions ()"><code class="function">g_action_group_list_actions()</code></a> and
<a class="link" href="GActionGroup.html#g-action-group-query-action" title="g_action_group_query_action ()"><code class="function">g_action_group_query_action()</code></a>. The other virtual functions should
not be implemented - their "wrappers" are actually implemented with
calls to <a class="link" href="GActionGroup.html#g-action-group-query-action" title="g_action_group_query_action ()"><code class="function">g_action_group_query_action()</code></a>.</p>
</div>
<div class="refsect1">
<a name="GActionGroup.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="g-action-group-list-actions"></a><h3>g_action_group_list_actions ()</h3>
<pre class="programlisting"><a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> **
g_action_group_list_actions (<em class="parameter"><code><a class="link" href="GActionGroup.html" title="GActionGroup"><span class="type">GActionGroup</span></a> *action_group</code></em>);</pre>
<p>Lists the actions contained within <em class="parameter"><code>action_group</code></em>
.</p>
<p>The caller is responsible for freeing the list with <a href="https://developer.gnome.org/glib/unstable/glib-String-Utility-Functions.html#g-strfreev"><code class="function">g_strfreev()</code></a> when
it is no longer required.</p>
<div class="refsect3">
<a name="id-1.4.22.4.12.2.6"></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>action_group</p></td>
<td class="parameter_description"><p>a <a class="link" href="GActionGroup.html" title="GActionGroup"><span class="type">GActionGroup</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.4.22.4.12.2.7"></a><h4>Returns</h4>
<p> a <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>-terminated array of the names of the
actions in the groupb. </p>
<p><span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
<p class="since">Since 2.28</p>
</div>
<hr>
<div class="refsect2">
<a name="g-action-group-query-action"></a><h3>g_action_group_query_action ()</h3>
<pre class="programlisting"><a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
g_action_group_query_action (<em class="parameter"><code><a class="link" href="GActionGroup.html" title="GActionGroup"><span class="type">GActionGroup</span></a> *action_group</code></em>,
<em class="parameter"><code>const <a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *action_name</code></em>,
<em class="parameter"><code><a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> *enabled</code></em>,
<em class="parameter"><code>const <a href="https://developer.gnome.org/glib/unstable/glib-GVariantType.html#GVariantType"><span class="type">GVariantType</span></a> **parameter_type</code></em>,
<em class="parameter"><code>const <a href="https://developer.gnome.org/glib/unstable/glib-GVariantType.html#GVariantType"><span class="type">GVariantType</span></a> **state_type</code></em>,
<em class="parameter"><code><a href="https://developer.gnome.org/glib/unstable/glib-GVariant.html#GVariant"><span class="type">GVariant</span></a> **state_hint</code></em>,
<em class="parameter"><code><a href="https://developer.gnome.org/glib/unstable/glib-GVariant.html#GVariant"><span class="type">GVariant</span></a> **state</code></em>);</pre>
<p>Queries all aspects of the named action within an <em class="parameter"><code>action_group</code></em>
.</p>
<p>This function acquires the information available from
<a class="link" href="GActionGroup.html#g-action-group-has-action" title="g_action_group_has_action ()"><code class="function">g_action_group_has_action()</code></a>, <a class="link" href="GActionGroup.html#g-action-group-get-action-enabled" title="g_action_group_get_action_enabled ()"><code class="function">g_action_group_get_action_enabled()</code></a>,
<a class="link" href="GActionGroup.html#g-action-group-get-action-parameter-type" title="g_action_group_get_action_parameter_type ()"><code class="function">g_action_group_get_action_parameter_type()</code></a>,
<a class="link" href="GActionGroup.html#g-action-group-get-action-state-type" title="g_action_group_get_action_state_type ()"><code class="function">g_action_group_get_action_state_type()</code></a>,
<a class="link" href="GActionGroup.html#g-action-group-get-action-state-hint" title="g_action_group_get_action_state_hint ()"><code class="function">g_action_group_get_action_state_hint()</code></a> and
<a class="link" href="GActionGroup.html#g-action-group-get-action-state" title="g_action_group_get_action_state ()"><code class="function">g_action_group_get_action_state()</code></a> with a single function call.</p>
<p>This provides two main benefits.</p>
<p>The first is the improvement in efficiency that comes with not having
to perform repeated lookups of the action in order to discover
different things about it. The second is that implementing
<a class="link" href="GActionGroup.html" title="GActionGroup"><span class="type">GActionGroup</span></a> can now be done by only overriding this one virtual
function.</p>
<p>The interface provides a default implementation of this function that
calls the individual functions, as required, to fetch the
information. The interface also provides default implementations of
those functions that call this function. All implementations,
therefore, must override either this function or all of the others.</p>
<p>If the action exists, <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> is returned and any of the requested
fields (as indicated by having a non-<a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> reference passed in) are
filled. If the action doesn't exist, <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> is returned and the
fields may or may not have been modified.</p>
<div class="refsect3">
<a name="id-1.4.22.4.12.3.10"></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>action_group</p></td>
<td class="parameter_description"><p>a <a class="link" href="GActionGroup.html" title="GActionGroup"><span class="type">GActionGroup</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>action_name</p></td>
<td class="parameter_description"><p>the name of an action in the group</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>enabled</p></td>
<td class="parameter_description"><p> if the action is presently enabled. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>parameter_type</p></td>
<td class="parameter_description"><p> the parameter type, or <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> if none needed. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>state_type</p></td>
<td class="parameter_description"><p> the state type, or <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> if stateless. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>state_hint</p></td>
<td class="parameter_description"><p> the state hint, or <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> if none. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
<tr>
<td class="parameter_name"><p>state</p></td>
<td class="parameter_description"><p> the current state, or <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> if stateless. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>][<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.4.22.4.12.3.11"></a><h4>Returns</h4>
<p> <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the action exists, else <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a></p>
<p></p>
</div>
<p class="since">Since 2.32</p>
</div>
<hr>
<div class="refsect2">
<a name="g-action-group-has-action"></a><h3>g_action_group_has_action ()</h3>
<pre class="programlisting"><a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
g_action_group_has_action (<em class="parameter"><code><a class="link" href="GActionGroup.html" title="GActionGroup"><span class="type">GActionGroup</span></a> *action_group</code></em>,
<em class="parameter"><code>const <a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *action_name</code></em>);</pre>
<p>Checks if the named action exists within <em class="parameter"><code>action_group</code></em>
.</p>
<div class="refsect3">
<a name="id-1.4.22.4.12.4.5"></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>action_group</p></td>
<td class="parameter_description"><p>a <a class="link" href="GActionGroup.html" title="GActionGroup"><span class="type">GActionGroup</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>action_name</p></td>
<td class="parameter_description"><p>the name of the action to check for</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.4.22.4.12.4.6"></a><h4>Returns</h4>
<p> whether the named action exists</p>
<p></p>
</div>
<p class="since">Since 2.28</p>
</div>
<hr>
<div class="refsect2">
<a name="g-action-group-get-action-enabled"></a><h3>g_action_group_get_action_enabled ()</h3>
<pre class="programlisting"><a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
g_action_group_get_action_enabled (<em class="parameter"><code><a class="link" href="GActionGroup.html" title="GActionGroup"><span class="type">GActionGroup</span></a> *action_group</code></em>,
<em class="parameter"><code>const <a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *action_name</code></em>);</pre>
<p>Checks if the named action within <em class="parameter"><code>action_group</code></em>
is currently enabled.</p>
<p>An action must be enabled in order to be activated or in order to
have its state changed from outside callers.</p>
<div class="refsect3">
<a name="id-1.4.22.4.12.5.6"></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>action_group</p></td>
<td class="parameter_description"><p>a <a class="link" href="GActionGroup.html" title="GActionGroup"><span class="type">GActionGroup</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>action_name</p></td>
<td class="parameter_description"><p>the name of the action to query</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.4.22.4.12.5.7"></a><h4>Returns</h4>
<p> whether or not the action is currently enabled</p>
<p></p>
</div>
<p class="since">Since 2.28</p>
</div>
<hr>
<div class="refsect2">
<a name="g-action-group-get-action-parameter-type"></a><h3>g_action_group_get_action_parameter_type ()</h3>
<pre class="programlisting">const <a href="https://developer.gnome.org/glib/unstable/glib-GVariantType.html#GVariantType"><span class="returnvalue">GVariantType</span></a> *
g_action_group_get_action_parameter_type
(<em class="parameter"><code><a class="link" href="GActionGroup.html" title="GActionGroup"><span class="type">GActionGroup</span></a> *action_group</code></em>,
<em class="parameter"><code>const <a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *action_name</code></em>);</pre>
<p>Queries the type of the parameter that must be given when activating
the named action within <em class="parameter"><code>action_group</code></em>
.</p>
<p>When activating the action using <a class="link" href="GActionGroup.html#g-action-group-activate-action" title="g_action_group_activate_action ()"><code class="function">g_action_group_activate_action()</code></a>,
the <a href="https://developer.gnome.org/glib/unstable/glib-GVariant.html#GVariant"><span class="type">GVariant</span></a> given to that function must be of the type returned
by this function.</p>
<p>In the case that this function returns <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>, you must not give any
<a href="https://developer.gnome.org/glib/unstable/glib-GVariant.html#GVariant"><span class="type">GVariant</span></a>, but <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> instead.</p>
<p>The parameter type of a particular action will never change but it is
possible for an action to be removed and for a new action to be added
with the same name but a different parameter type.</p>
<div class="refsect3">
<a name="id-1.4.22.4.12.6.8"></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>action_group</p></td>
<td class="parameter_description"><p>a <a class="link" href="GActionGroup.html" title="GActionGroup"><span class="type">GActionGroup</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>action_name</p></td>
<td class="parameter_description"><p>the name of the action to query</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.4.22.4.12.6.9"></a><h4>Returns</h4>
<p> the parameter type. </p>
<p><span class="annotation">[<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></p>
</div>
<p class="since">Since 2.28</p>
</div>
<hr>
<div class="refsect2">
<a name="g-action-group-get-action-state-type"></a><h3>g_action_group_get_action_state_type ()</h3>
<pre class="programlisting">const <a href="https://developer.gnome.org/glib/unstable/glib-GVariantType.html#GVariantType"><span class="returnvalue">GVariantType</span></a> *
g_action_group_get_action_state_type (<em class="parameter"><code><a class="link" href="GActionGroup.html" title="GActionGroup"><span class="type">GActionGroup</span></a> *action_group</code></em>,
<em class="parameter"><code>const <a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *action_name</code></em>);</pre>
<p>Queries the type of the state of the named action within
<em class="parameter"><code>action_group</code></em>
.</p>
<p>If the action is stateful then this function returns the
<a href="https://developer.gnome.org/glib/unstable/glib-GVariantType.html#GVariantType"><span class="type">GVariantType</span></a> of the state. All calls to
<a class="link" href="GActionGroup.html#g-action-group-change-action-state" title="g_action_group_change_action_state ()"><code class="function">g_action_group_change_action_state()</code></a> must give a <a href="https://developer.gnome.org/glib/unstable/glib-GVariant.html#GVariant"><span class="type">GVariant</span></a> of this
type and <a class="link" href="GActionGroup.html#g-action-group-get-action-state" title="g_action_group_get_action_state ()"><code class="function">g_action_group_get_action_state()</code></a> will return a <a href="https://developer.gnome.org/glib/unstable/glib-GVariant.html#GVariant"><span class="type">GVariant</span></a>
of the same type.</p>
<p>If the action is not stateful then this function will return <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>.
In that case, <a class="link" href="GActionGroup.html#g-action-group-get-action-state" title="g_action_group_get_action_state ()"><code class="function">g_action_group_get_action_state()</code></a> will return <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>
and you must not call <a class="link" href="GActionGroup.html#g-action-group-change-action-state" title="g_action_group_change_action_state ()"><code class="function">g_action_group_change_action_state()</code></a>.</p>
<p>The state type of a particular action will never change but it is
possible for an action to be removed and for a new action to be added
with the same name but a different state type.</p>
<div class="refsect3">
<a name="id-1.4.22.4.12.7.8"></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>action_group</p></td>
<td class="parameter_description"><p>a <a class="link" href="GActionGroup.html" title="GActionGroup"><span class="type">GActionGroup</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>action_name</p></td>
<td class="parameter_description"><p>the name of the action to query</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.4.22.4.12.7.9"></a><h4>Returns</h4>
<p> the state type, if the action
is stateful. </p>
<p><span class="annotation">[<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>][<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
<p class="since">Since 2.28</p>
</div>
<hr>
<div class="refsect2">
<a name="g-action-group-get-action-state-hint"></a><h3>g_action_group_get_action_state_hint ()</h3>
<pre class="programlisting"><a href="https://developer.gnome.org/glib/unstable/glib-GVariant.html#GVariant"><span class="returnvalue">GVariant</span></a> *
g_action_group_get_action_state_hint (<em class="parameter"><code><a class="link" href="GActionGroup.html" title="GActionGroup"><span class="type">GActionGroup</span></a> *action_group</code></em>,
<em class="parameter"><code>const <a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *action_name</code></em>);</pre>
<p>Requests a hint about the valid range of values for the state of the
named action within <em class="parameter"><code>action_group</code></em>
.</p>
<p>If <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> is returned it either means that the action is not stateful
or that there is no hint about the valid range of values for the
state of the action.</p>
<p>If a <a href="https://developer.gnome.org/glib/unstable/glib-GVariant.html#GVariant"><span class="type">GVariant</span></a> array is returned then each item in the array is a
possible value for the state. If a <a href="https://developer.gnome.org/glib/unstable/glib-GVariant.html#GVariant"><span class="type">GVariant</span></a> pair (ie: two-tuple) is
returned then the tuple specifies the inclusive lower and upper bound
of valid values for the state.</p>
<p>In any case, the information is merely a hint. It may be possible to
have a state value outside of the hinted range and setting a value
within the range may fail.</p>
<p>The return value (if non-<a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>) should be freed with
<a href="https://developer.gnome.org/glib/unstable/glib-GVariant.html#g-variant-unref"><code class="function">g_variant_unref()</code></a> when it is no longer required.</p>
<div class="refsect3">
<a name="id-1.4.22.4.12.8.9"></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>action_group</p></td>
<td class="parameter_description"><p>a <a class="link" href="GActionGroup.html" title="GActionGroup"><span class="type">GActionGroup</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>action_name</p></td>
<td class="parameter_description"><p>the name of the action to query</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.4.22.4.12.8.10"></a><h4>Returns</h4>
<p> the state range hint. </p>
<p><span class="annotation">[<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>][<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
<p class="since">Since 2.28</p>
</div>
<hr>
<div class="refsect2">
<a name="g-action-group-get-action-state"></a><h3>g_action_group_get_action_state ()</h3>
<pre class="programlisting"><a href="https://developer.gnome.org/glib/unstable/glib-GVariant.html#GVariant"><span class="returnvalue">GVariant</span></a> *
g_action_group_get_action_state (<em class="parameter"><code><a class="link" href="GActionGroup.html" title="GActionGroup"><span class="type">GActionGroup</span></a> *action_group</code></em>,
<em class="parameter"><code>const <a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *action_name</code></em>);</pre>
<p>Queries the current state of the named action within <em class="parameter"><code>action_group</code></em>
.</p>
<p>If the action is not stateful then <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> will be returned. If the
action is stateful then the type of the return value is the type
given by <a class="link" href="GActionGroup.html#g-action-group-get-action-state-type" title="g_action_group_get_action_state_type ()"><code class="function">g_action_group_get_action_state_type()</code></a>.</p>
<p>The return value (if non-<a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>) should be freed with
<a href="https://developer.gnome.org/glib/unstable/glib-GVariant.html#g-variant-unref"><code class="function">g_variant_unref()</code></a> when it is no longer required.</p>
<div class="refsect3">
<a name="id-1.4.22.4.12.9.7"></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>action_group</p></td>
<td class="parameter_description"><p>a <a class="link" href="GActionGroup.html" title="GActionGroup"><span class="type">GActionGroup</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>action_name</p></td>
<td class="parameter_description"><p>the name of the action to query</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.4.22.4.12.9.8"></a><h4>Returns</h4>
<p> the current state of the action. </p>
<p><span class="annotation">[<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></p>
</div>
<p class="since">Since 2.28</p>
</div>
<hr>
<div class="refsect2">
<a name="g-action-group-change-action-state"></a><h3>g_action_group_change_action_state ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
g_action_group_change_action_state (<em class="parameter"><code><a class="link" href="GActionGroup.html" title="GActionGroup"><span class="type">GActionGroup</span></a> *action_group</code></em>,
<em class="parameter"><code>const <a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *action_name</code></em>,
<em class="parameter"><code><a href="https://developer.gnome.org/glib/unstable/glib-GVariant.html#GVariant"><span class="type">GVariant</span></a> *value</code></em>);</pre>
<p>Request for the state of the named action within <em class="parameter"><code>action_group</code></em>
to be
changed to <em class="parameter"><code>value</code></em>
.</p>
<p>The action must be stateful and <em class="parameter"><code>value</code></em>
must be of the correct type.
See <a class="link" href="GActionGroup.html#g-action-group-get-action-state-type" title="g_action_group_get_action_state_type ()"><code class="function">g_action_group_get_action_state_type()</code></a>.</p>
<p>This call merely requests a change. The action may refuse to change
its state or may change its state to something other than <em class="parameter"><code>value</code></em>
.
See <a class="link" href="GActionGroup.html#g-action-group-get-action-state-hint" title="g_action_group_get_action_state_hint ()"><code class="function">g_action_group_get_action_state_hint()</code></a>.</p>
<p>If the <em class="parameter"><code>value</code></em>
GVariant is floating, it is consumed.</p>
<div class="refsect3">
<a name="id-1.4.22.4.12.10.8"></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>action_group</p></td>
<td class="parameter_description"><p>a <a class="link" href="GActionGroup.html" title="GActionGroup"><span class="type">GActionGroup</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>action_name</p></td>
<td class="parameter_description"><p>the name of the action to request the change on</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>value</p></td>
<td class="parameter_description"><p>the new state</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since 2.28</p>
</div>
<hr>
<div class="refsect2">
<a name="g-action-group-activate-action"></a><h3>g_action_group_activate_action ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
g_action_group_activate_action (<em class="parameter"><code><a class="link" href="GActionGroup.html" title="GActionGroup"><span class="type">GActionGroup</span></a> *action_group</code></em>,
<em class="parameter"><code>const <a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *action_name</code></em>,
<em class="parameter"><code><a href="https://developer.gnome.org/glib/unstable/glib-GVariant.html#GVariant"><span class="type">GVariant</span></a> *parameter</code></em>);</pre>
<p>Activate the named action within <em class="parameter"><code>action_group</code></em>
.</p>
<p>If the action is expecting a parameter, then the correct type of
parameter must be given as <em class="parameter"><code>parameter</code></em>
. If the action is expecting no
parameters then <em class="parameter"><code>parameter</code></em>
must be <a href="https://developer.gnome.org/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. See
<a class="link" href="GActionGroup.html#g-action-group-get-action-parameter-type" title="g_action_group_get_action_parameter_type ()"><code class="function">g_action_group_get_action_parameter_type()</code></a>.</p>
<div class="refsect3">
<a name="id-1.4.22.4.12.11.6"></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>action_group</p></td>
<td class="parameter_description"><p>a <a class="link" href="GActionGroup.html" title="GActionGroup"><span class="type">GActionGroup</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>action_name</p></td>
<td class="parameter_description"><p>the name of the action to activate</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>parameter</p></td>
<td class="parameter_description"><p> parameters to the activation. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since 2.28</p>
</div>
<hr>
<div class="refsect2">
<a name="g-action-group-action-added"></a><h3>g_action_group_action_added ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
g_action_group_action_added (<em class="parameter"><code><a class="link" href="GActionGroup.html" title="GActionGroup"><span class="type">GActionGroup</span></a> *action_group</code></em>,
<em class="parameter"><code>const <a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *action_name</code></em>);</pre>
<p>Emits the <a class="link" href="GActionGroup.html#GActionGroup-action-added" title="The “action-added” signal"><span class="type">“action-added”</span></a> signal on <em class="parameter"><code>action_group</code></em>
.</p>
<p>This function should only be called by <a class="link" href="GActionGroup.html" title="GActionGroup"><span class="type">GActionGroup</span></a> implementations.</p>
<div class="refsect3">
<a name="id-1.4.22.4.12.12.6"></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>action_group</p></td>
<td class="parameter_description"><p>a <a class="link" href="GActionGroup.html" title="GActionGroup"><span class="type">GActionGroup</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>action_name</p></td>
<td class="parameter_description"><p>the name of an action in the group</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since 2.28</p>
</div>
<hr>
<div class="refsect2">
<a name="g-action-group-action-removed"></a><h3>g_action_group_action_removed ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
g_action_group_action_removed (<em class="parameter"><code><a class="link" href="GActionGroup.html" title="GActionGroup"><span class="type">GActionGroup</span></a> *action_group</code></em>,
<em class="parameter"><code>const <a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *action_name</code></em>);</pre>
<p>Emits the <a class="link" href="GActionGroup.html#GActionGroup-action-removed" title="The “action-removed” signal"><span class="type">“action-removed”</span></a> signal on <em class="parameter"><code>action_group</code></em>
.</p>
<p>This function should only be called by <a class="link" href="GActionGroup.html" title="GActionGroup"><span class="type">GActionGroup</span></a> implementations.</p>
<div class="refsect3">
<a name="id-1.4.22.4.12.13.6"></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>action_group</p></td>
<td class="parameter_description"><p>a <a class="link" href="GActionGroup.html" title="GActionGroup"><span class="type">GActionGroup</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>action_name</p></td>
<td class="parameter_description"><p>the name of an action in the group</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since 2.28</p>
</div>
<hr>
<div class="refsect2">
<a name="g-action-group-action-enabled-changed"></a><h3>g_action_group_action_enabled_changed ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
g_action_group_action_enabled_changed (<em class="parameter"><code><a class="link" href="GActionGroup.html" title="GActionGroup"><span class="type">GActionGroup</span></a> *action_group</code></em>,
<em class="parameter"><code>const <a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *action_name</code></em>,
<em class="parameter"><code><a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> enabled</code></em>);</pre>
<p>Emits the <a class="link" href="GActionGroup.html#GActionGroup-action-enabled-changed" title="The “action-enabled-changed” signal"><span class="type">“action-enabled-changed”</span></a> signal on <em class="parameter"><code>action_group</code></em>
.</p>
<p>This function should only be called by <a class="link" href="GActionGroup.html" title="GActionGroup"><span class="type">GActionGroup</span></a> implementations.</p>
<div class="refsect3">
<a name="id-1.4.22.4.12.14.6"></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>action_group</p></td>
<td class="parameter_description"><p>a <a class="link" href="GActionGroup.html" title="GActionGroup"><span class="type">GActionGroup</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>action_name</p></td>
<td class="parameter_description"><p>the name of an action in the group</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>enabled</p></td>
<td class="parameter_description"><p>whether or not the action is now enabled</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since 2.28</p>
</div>
<hr>
<div class="refsect2">
<a name="g-action-group-action-state-changed"></a><h3>g_action_group_action_state_changed ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
g_action_group_action_state_changed (<em class="parameter"><code><a class="link" href="GActionGroup.html" title="GActionGroup"><span class="type">GActionGroup</span></a> *action_group</code></em>,
<em class="parameter"><code>const <a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *action_name</code></em>,
<em class="parameter"><code><a href="https://developer.gnome.org/glib/unstable/glib-GVariant.html#GVariant"><span class="type">GVariant</span></a> *state</code></em>);</pre>
<p>Emits the <a class="link" href="GActionGroup.html#GActionGroup-action-state-changed" title="The “action-state-changed” signal"><span class="type">“action-state-changed”</span></a> signal on <em class="parameter"><code>action_group</code></em>
.</p>
<p>This function should only be called by <a class="link" href="GActionGroup.html" title="GActionGroup"><span class="type">GActionGroup</span></a> implementations.</p>
<div class="refsect3">
<a name="id-1.4.22.4.12.15.6"></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>action_group</p></td>
<td class="parameter_description"><p>a <a class="link" href="GActionGroup.html" title="GActionGroup"><span class="type">GActionGroup</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>action_name</p></td>
<td class="parameter_description"><p>the name of an action in the group</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>state</p></td>
<td class="parameter_description"><p>the new state of the named action</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since 2.28</p>
</div>
</div>
<div class="refsect1">
<a name="GActionGroup.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="GActionGroup-struct"></a><h3>GActionGroup</h3>
<pre class="programlisting">typedef struct _GActionGroup GActionGroup;</pre>
</div>
<hr>
<div class="refsect2">
<a name="GActionGroupInterface"></a><h3>struct GActionGroupInterface</h3>
<pre class="programlisting">struct GActionGroupInterface {
GTypeInterface g_iface;
/* virtual functions */
gboolean (* has_action) (GActionGroup *action_group,
const gchar *action_name);
gchar ** (* list_actions) (GActionGroup *action_group);
gboolean (* get_action_enabled) (GActionGroup *action_group,
const gchar *action_name);
const GVariantType * (* get_action_parameter_type) (GActionGroup *action_group,
const gchar *action_name);
const GVariantType * (* get_action_state_type) (GActionGroup *action_group,
const gchar *action_name);
GVariant * (* get_action_state_hint) (GActionGroup *action_group,
const gchar *action_name);
GVariant * (* get_action_state) (GActionGroup *action_group,
const gchar *action_name);
void (* change_action_state) (GActionGroup *action_group,
const gchar *action_name,
GVariant *value);
void (* activate_action) (GActionGroup *action_group,
const gchar *action_name,
GVariant *parameter);
/* signals */
void (* action_added) (GActionGroup *action_group,
const gchar *action_name);
void (* action_removed) (GActionGroup *action_group,
const gchar *action_name);
void (* action_enabled_changed) (GActionGroup *action_group,
const gchar *action_name,
gboolean enabled);
void (* action_state_changed) (GActionGroup *action_group,
const gchar *action_name,
GVariant *state);
/* more virtual functions */
gboolean (* query_action) (GActionGroup *action_group,
const gchar *action_name,
gboolean *enabled,
const GVariantType **parameter_type,
const GVariantType **state_type,
GVariant **state_hint,
GVariant **state);
};
</pre>
<p>The virtual function table for <a class="link" href="GActionGroup.html" title="GActionGroup"><span class="type">GActionGroup</span></a>.</p>
<div class="refsect3">
<a name="id-1.4.22.4.13.3.5"></a><h4>Members</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="300px" class="struct_members_name">
<col class="struct_members_description">
<col width="200px" class="struct_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="struct_member_name"><p><a href="https://developer.gnome.org/gobject/unstable/gobject-Type-Information.html#GTypeInterface"><span class="type">GTypeInterface</span></a> <em class="structfield"><code><a name="GActionGroupInterface.g-iface"></a>g_iface</code></em>;</p></td>
<td> </td>
<td> </td>
</tr>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="GActionGroupInterface.has-action"></a>has_action</code></em> ()</p></td>
<td class="struct_member_description"><p>the virtual function pointer for <a class="link" href="GActionGroup.html#g-action-group-has-action" title="g_action_group_has_action ()"><code class="function">g_action_group_has_action()</code></a></p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="GActionGroupInterface.list-actions"></a>list_actions</code></em> ()</p></td>
<td class="struct_member_description"><p>the virtual function pointer for <a class="link" href="GActionGroup.html#g-action-group-list-actions" title="g_action_group_list_actions ()"><code class="function">g_action_group_list_actions()</code></a></p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="GActionGroupInterface.get-action-enabled"></a>get_action_enabled</code></em> ()</p></td>
<td class="struct_member_description"><p>the virtual function pointer for <a class="link" href="GActionGroup.html#g-action-group-get-action-enabled" title="g_action_group_get_action_enabled ()"><code class="function">g_action_group_get_action_enabled()</code></a></p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="GActionGroupInterface.get-action-parameter-type"></a>get_action_parameter_type</code></em> ()</p></td>
<td class="struct_member_description"><p>the virtual function pointer for <a class="link" href="GActionGroup.html#g-action-group-get-action-parameter-type" title="g_action_group_get_action_parameter_type ()"><code class="function">g_action_group_get_action_parameter_type()</code></a></p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="GActionGroupInterface.get-action-state-type"></a>get_action_state_type</code></em> ()</p></td>
<td class="struct_member_description"><p>the virtual function pointer for <a class="link" href="GActionGroup.html#g-action-group-get-action-state-type" title="g_action_group_get_action_state_type ()"><code class="function">g_action_group_get_action_state_type()</code></a></p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="GActionGroupInterface.get-action-state-hint"></a>get_action_state_hint</code></em> ()</p></td>
<td class="struct_member_description"><p>the virtual function pointer for <a class="link" href="GActionGroup.html#g-action-group-get-action-state-hint" title="g_action_group_get_action_state_hint ()"><code class="function">g_action_group_get_action_state_hint()</code></a></p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="GActionGroupInterface.get-action-state"></a>get_action_state</code></em> ()</p></td>
<td class="struct_member_description"><p>the virtual function pointer for <a class="link" href="GActionGroup.html#g-action-group-get-action-state" title="g_action_group_get_action_state ()"><code class="function">g_action_group_get_action_state()</code></a></p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="GActionGroupInterface.change-action-state"></a>change_action_state</code></em> ()</p></td>
<td class="struct_member_description"><p>the virtual function pointer for <a class="link" href="GActionGroup.html#g-action-group-change-action-state" title="g_action_group_change_action_state ()"><code class="function">g_action_group_change_action_state()</code></a></p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="GActionGroupInterface.activate-action"></a>activate_action</code></em> ()</p></td>
<td class="struct_member_description"><p>the virtual function pointer for <a class="link" href="GActionGroup.html#g-action-group-activate-action" title="g_action_group_activate_action ()"><code class="function">g_action_group_activate_action()</code></a></p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="GActionGroupInterface.action-added"></a>action_added</code></em> ()</p></td>
<td class="struct_member_description"><p>the class closure for the <a class="link" href="GActionGroup.html#GActionGroup-action-added" title="The “action-added” signal"><span class="type">“action-added”</span></a> signal</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="GActionGroupInterface.action-removed"></a>action_removed</code></em> ()</p></td>
<td class="struct_member_description"><p>the class closure for the <a class="link" href="GActionGroup.html#GActionGroup-action-removed" title="The “action-removed” signal"><span class="type">“action-removed”</span></a> signal</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="GActionGroupInterface.action-enabled-changed"></a>action_enabled_changed</code></em> ()</p></td>
<td class="struct_member_description"><p>the class closure for the <a class="link" href="GActionGroup.html#GActionGroup-action-enabled-changed" title="The “action-enabled-changed” signal"><span class="type">“action-enabled-changed”</span></a> signal</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="GActionGroupInterface.action-state-changed"></a>action_state_changed</code></em> ()</p></td>
<td class="struct_member_description"><p>the class closure for the <a class="link" href="GActionGroup.html#GActionGroup-action-enabled-changed" title="The “action-enabled-changed” signal"><span class="type">“action-enabled-changed”</span></a> signal</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="GActionGroupInterface.query-action"></a>query_action</code></em> ()</p></td>
<td class="struct_member_description"><p>the virtual function pointer for <a class="link" href="GActionGroup.html#g-action-group-query-action" title="g_action_group_query_action ()"><code class="function">g_action_group_query_action()</code></a></p></td>
<td class="struct_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since 2.28</p>
</div>
</div>
<div class="refsect1">
<a name="GActionGroup.signal-details"></a><h2>Signal Details</h2>
<div class="refsect2">
<a name="GActionGroup-action-added"></a><h3>The <code class="literal">“action-added”</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
user_function (<a class="link" href="GActionGroup.html" title="GActionGroup"><span class="type">GActionGroup</span></a> *action_group,
<a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *action_name,
<a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data)</pre>
<p>Signals that a new action was just added to the group.
This signal is emitted after the action has been added
and is now visible.</p>
<div class="refsect3">
<a name="id-1.4.22.4.14.2.5"></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>action_group</p></td>
<td class="parameter_description"><p>the <a class="link" href="GActionGroup.html" title="GActionGroup"><span class="type">GActionGroup</span></a> that changed</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>action_name</p></td>
<td class="parameter_description"><p>the name of the action in <em class="parameter"><code>action_group</code></em>
</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: Has Details</p>
<p class="since">Since 2.28</p>
</div>
<hr>
<div class="refsect2">
<a name="GActionGroup-action-enabled-changed"></a><h3>The <code class="literal">“action-enabled-changed”</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
user_function (<a class="link" href="GActionGroup.html" title="GActionGroup"><span class="type">GActionGroup</span></a> *action_group,
<a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *action_name,
<a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> enabled,
<a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data)</pre>
<p>Signals that the enabled status of the named action has changed.</p>
<div class="refsect3">
<a name="id-1.4.22.4.14.3.5"></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>action_group</p></td>
<td class="parameter_description"><p>the <a class="link" href="GActionGroup.html" title="GActionGroup"><span class="type">GActionGroup</span></a> that changed</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>action_name</p></td>
<td class="parameter_description"><p>the name of the action in <em class="parameter"><code>action_group</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>enabled</p></td>
<td class="parameter_description"><p>whether the action is enabled or not</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: Has Details</p>
<p class="since">Since 2.28</p>
</div>
<hr>
<div class="refsect2">
<a name="GActionGroup-action-removed"></a><h3>The <code class="literal">“action-removed”</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
user_function (<a class="link" href="GActionGroup.html" title="GActionGroup"><span class="type">GActionGroup</span></a> *action_group,
<a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *action_name,
<a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data)</pre>
<p>Signals that an action is just about to be removed from the group.
This signal is emitted before the action is removed, so the action
is still visible and can be queried from the signal handler.</p>
<div class="refsect3">
<a name="id-1.4.22.4.14.4.5"></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>action_group</p></td>
<td class="parameter_description"><p>the <a class="link" href="GActionGroup.html" title="GActionGroup"><span class="type">GActionGroup</span></a> that changed</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>action_name</p></td>
<td class="parameter_description"><p>the name of the action in <em class="parameter"><code>action_group</code></em>
</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: Has Details</p>
<p class="since">Since 2.28</p>
</div>
<hr>
<div class="refsect2">
<a name="GActionGroup-action-state-changed"></a><h3>The <code class="literal">“action-state-changed”</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
user_function (<a class="link" href="GActionGroup.html" title="GActionGroup"><span class="type">GActionGroup</span></a> *action_group,
<a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *action_name,
<a href="https://developer.gnome.org/glib/unstable/glib-GVariant.html#GVariant"><span class="type">GVariant</span></a> *value,
<a href="https://developer.gnome.org/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data)</pre>
<p>Signals that the state of the named action has changed.</p>
<div class="refsect3">
<a name="id-1.4.22.4.14.5.5"></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>action_group</p></td>
<td class="parameter_description"><p>the <a class="link" href="GActionGroup.html" title="GActionGroup"><span class="type">GActionGroup</span></a> that changed</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>action_name</p></td>
<td class="parameter_description"><p>the name of the action in <em class="parameter"><code>action_group</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>value</p></td>
<td class="parameter_description"><p>the new value of the state</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: Has Details</p>
<p class="since">Since 2.28</p>
</div>
</div>
<div class="refsect1">
<a name="GActionGroup.see-also"></a><h2>See Also</h2>
<p><a class="link" href="GAction.html" title="GAction"><span class="type">GAction</span></a></p>
</div>
</div>
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