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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>XfconfBackend: Xfconf Reference Manual</title>
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<table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="5"><tr valign="middle">
<td width="100%" align="left" class="shortcuts">
<a href="#" class="shortcut">Top</a><span id="nav_description">  <span class="dim">|</span> 
                  <a href="#xfconf-xfconf-backend.description" class="shortcut">Description</a></span><span id="nav_hierarchy">  <span class="dim">|</span> 
                  <a href="#xfconf-xfconf-backend.object-hierarchy" class="shortcut">Object Hierarchy</a></span><span id="nav_prerequisites">  <span class="dim">|</span> 
                  <a href="#xfconf-xfconf-backend.prerequisites" class="shortcut">Prerequisites</a></span>
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<td><a accesskey="h" href="index.html"><img src="home.png" width="16" height="16" border="0" alt="Home"></a></td>
<td><a accesskey="u" href="ch02.html"><img src="up.png" width="16" height="16" border="0" alt="Up"></a></td>
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</tr></table>
<div class="refentry">
<a name="xfconf-xfconf-backend"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="xfconf-xfconf-backend.top_of_page"></a>XfconfBackend</span></h2>
<p>XfconfBackend — Interface for configuration store backends</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="xfconf-xfconf-backend.functions"></a><h2>Functions</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="functions_return">
<col class="functions_name">
</colgroup>
<tbody>
<tr>
<td class="function_type">
<span class="returnvalue">gboolean</span>
</td>
<td class="function_name">
<a class="link" href="xfconf-xfconf-backend.html#xfconf-backend-initialize" title="xfconf_backend_initialize ()">xfconf_backend_initialize</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">gboolean</span>
</td>
<td class="function_name">
<a class="link" href="xfconf-xfconf-backend.html#xfconf-backend-set" title="xfconf_backend_set ()">xfconf_backend_set</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">gboolean</span>
</td>
<td class="function_name">
<a class="link" href="xfconf-xfconf-backend.html#xfconf-backend-get" title="xfconf_backend_get ()">xfconf_backend_get</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">gboolean</span>
</td>
<td class="function_name">
<a class="link" href="xfconf-xfconf-backend.html#xfconf-backend-get-all" title="xfconf_backend_get_all ()">xfconf_backend_get_all</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">gboolean</span>
</td>
<td class="function_name">
<a class="link" href="xfconf-xfconf-backend.html#xfconf-backend-exists" title="xfconf_backend_exists ()">xfconf_backend_exists</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">gboolean</span>
</td>
<td class="function_name">
<a class="link" href="xfconf-xfconf-backend.html#xfconf-backend-reset" title="xfconf_backend_reset ()">xfconf_backend_reset</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">gboolean</span>
</td>
<td class="function_name">
<a class="link" href="xfconf-xfconf-backend.html#xfconf-backend-flush" title="xfconf_backend_flush ()">xfconf_backend_flush</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="xfconf-xfconf-backend.html#xfconf-backend-register-property-changed-func" title="xfconf_backend_register_property_changed_func ()">xfconf_backend_register_property_changed_func</a> <span class="c_punctuation">()</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<a name="XfconfBackend"></a><div class="refsect1">
<a name="xfconf-xfconf-backend.other"></a><h2>Types and Values</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="name">
<col class="description">
</colgroup>
<tbody>
<tr>
<td class="datatype_keyword">struct</td>
<td class="function_name"><a class="link" href="xfconf-xfconf-backend.html#XfconfBackendInterface" title="struct XfconfBackendInterface">XfconfBackendInterface</a></td>
</tr>
<tr>
<td class="datatype_keyword"> </td>
<td class="function_name"><a class="link" href="xfconf-xfconf-backend.html#XfconfBackend-struct" title="XfconfBackend">XfconfBackend</a></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="xfconf-xfconf-backend.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="screen">    <a href="/usr/share/gtk-doc/html/gobject/GTypeModule.html">GInterface</a>
    <span class="lineart">╰──</span> XfconfBackend
</pre>
</div>
<div class="refsect1">
<a name="xfconf-xfconf-backend.prerequisites"></a><h2>Prerequisites</h2>
<p>
XfconfBackend requires
 GObject.</p>
</div>
<div class="refsect1">
<a name="xfconf-xfconf-backend.description"></a><h2>Description</h2>
<p>
XfconfBackend is an abstract interface that allows the Xfconf Daemon
to use different backends for storing configuration data.  These backends
can be flat text or binary files, a database, or just about anything
one could think of to store data.
</p>
</div>
<div class="refsect1">
<a name="xfconf-xfconf-backend.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="xfconf-backend-initialize"></a><h3>xfconf_backend_initialize ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>
xfconf_backend_initialize (<em class="parameter"><code><a class="link" href="xfconf-xfconf-backend.html#XfconfBackend"><span class="type">XfconfBackend</span></a> *backend</code></em>,
                           <em class="parameter"><code><span class="type">GError</span> **error</code></em>);</pre>
<p>Does any pre-initialization that the backend needs to function.</p>
<div class="refsect3">
<a name="xfconf-backend-initialize.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>backend</p></td>
<td class="parameter_description"><p>The <a class="link" href="xfconf-xfconf-backend.html#XfconfBackend"><span class="type">XfconfBackend</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>error</p></td>
<td class="parameter_description"><p>An error return.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="xfconf-backend-initialize.returns"></a><h4>Returns</h4>
<p> The backend should return <code class="literal">TRUE</code> if initialization
was successful, or <code class="literal">FALSE</code> otherwise.  On <code class="literal">FALSE</code>,
<em class="parameter"><code>error</code></em>
should be set to a description of the failure.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="xfconf-backend-set"></a><h3>xfconf_backend_set ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>
xfconf_backend_set (<em class="parameter"><code><a class="link" href="xfconf-xfconf-backend.html#XfconfBackend"><span class="type">XfconfBackend</span></a> *backend</code></em>,
                    <em class="parameter"><code>const <span class="type">gchar</span> *channel</code></em>,
                    <em class="parameter"><code>const <span class="type">gchar</span> *property</code></em>,
                    <em class="parameter"><code>const <span class="type">GValue</span> *value</code></em>,
                    <em class="parameter"><code><span class="type">GError</span> **error</code></em>);</pre>
<p>Sets the variant <em class="parameter"><code>value</code></em>
 for <em class="parameter"><code>property</code></em>
 on <em class="parameter"><code>channel</code></em>
.</p>
<div class="refsect3">
<a name="xfconf-backend-set.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>backend</p></td>
<td class="parameter_description"><p>The <a class="link" href="xfconf-xfconf-backend.html#XfconfBackend"><span class="type">XfconfBackend</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>channel</p></td>
<td class="parameter_description"><p>A channel name.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>property</p></td>
<td class="parameter_description"><p>A property name.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>value</p></td>
<td class="parameter_description"><p>A value.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>error</p></td>
<td class="parameter_description"><p>An error return.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="xfconf-backend-set.returns"></a><h4>Returns</h4>
<p> The backend should return <code class="literal">TRUE</code> if the operation
was successful, or <code class="literal">FALSE</code> otherwise.  On <code class="literal">FALSE</code>,
<em class="parameter"><code>error</code></em>
should be set to a description of the failure.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="xfconf-backend-get"></a><h3>xfconf_backend_get ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>
xfconf_backend_get (<em class="parameter"><code><a class="link" href="xfconf-xfconf-backend.html#XfconfBackend"><span class="type">XfconfBackend</span></a> *backend</code></em>,
                    <em class="parameter"><code>const <span class="type">gchar</span> *channel</code></em>,
                    <em class="parameter"><code>const <span class="type">gchar</span> *property</code></em>,
                    <em class="parameter"><code><span class="type">GValue</span> *value</code></em>,
                    <em class="parameter"><code><span class="type">GError</span> **error</code></em>);</pre>
<p>Gets the value of <em class="parameter"><code>property</code></em>
 on <em class="parameter"><code>channel</code></em>
 and stores it in <em class="parameter"><code>value</code></em>
.</p>
<div class="refsect3">
<a name="xfconf-backend-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>backend</p></td>
<td class="parameter_description"><p>The <a class="link" href="xfconf-xfconf-backend.html#XfconfBackend"><span class="type">XfconfBackend</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>channel</p></td>
<td class="parameter_description"><p>A channel name.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>property</p></td>
<td class="parameter_description"><p>A property name.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>value</p></td>
<td class="parameter_description"><p>A <span class="type">GValue</span> return.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>error</p></td>
<td class="parameter_description"><p>An error return.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="xfconf-backend-get.returns"></a><h4>Returns</h4>
<p> The backend should return <code class="literal">TRUE</code> if the operation
was successful, or <code class="literal">FALSE</code> otherwise.  On <code class="literal">FALSE</code>,
<em class="parameter"><code>error</code></em>
should be set to a description of the failure.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="xfconf-backend-get-all"></a><h3>xfconf_backend_get_all ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>
xfconf_backend_get_all (<em class="parameter"><code><a class="link" href="xfconf-xfconf-backend.html#XfconfBackend"><span class="type">XfconfBackend</span></a> *backend</code></em>,
                        <em class="parameter"><code>const <span class="type">gchar</span> *channel</code></em>,
                        <em class="parameter"><code>const <span class="type">gchar</span> *property_base</code></em>,
                        <em class="parameter"><code><span class="type">GHashTable</span> *properties</code></em>,
                        <em class="parameter"><code><span class="type">GError</span> **error</code></em>);</pre>
<p>Gets multiple properties and values on <em class="parameter"><code>channel</code></em>
 and stores them in
<em class="parameter"><code>properties</code></em>
, which is already initialized to hold <span class="type">gchar</span>* keys and
<span class="type">GValue</span>* values.  The <em class="parameter"><code>property_base</code></em>
 parameter can be
used to limit the retrieval to a sub-tree of the property tree.</p>
<p>A value of the empty string ("") or forward slash ("/") for
<em class="parameter"><code>property_base</code></em>
 indicates the entire channel.</p>
<div class="refsect3">
<a name="xfconf-backend-get-all.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>backend</p></td>
<td class="parameter_description"><p>The <a class="link" href="xfconf-xfconf-backend.html#XfconfBackend"><span class="type">XfconfBackend</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>channel</p></td>
<td class="parameter_description"><p>A channel name.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>property_base</p></td>
<td class="parameter_description"><p>The base of properties to return.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>properties</p></td>
<td class="parameter_description"><p>A <span class="type">GHashTable</span>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>error</p></td>
<td class="parameter_description"><p>An error return.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="xfconf-backend-get-all.returns"></a><h4>Returns</h4>
<p> The backend should return <code class="literal">TRUE</code> if the operation
was successful, or <code class="literal">FALSE</code> otherwise.  On <code class="literal">FALSE</code>,
<em class="parameter"><code>error</code></em>
should be set to a description of the failure.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="xfconf-backend-exists"></a><h3>xfconf_backend_exists ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>
xfconf_backend_exists (<em class="parameter"><code><a class="link" href="xfconf-xfconf-backend.html#XfconfBackend"><span class="type">XfconfBackend</span></a> *backend</code></em>,
                       <em class="parameter"><code>const <span class="type">gchar</span> *channel</code></em>,
                       <em class="parameter"><code>const <span class="type">gchar</span> *property</code></em>,
                       <em class="parameter"><code><span class="type">gboolean</span> *exists</code></em>,
                       <em class="parameter"><code><span class="type">GError</span> **error</code></em>);</pre>
<p>Checks to see if <em class="parameter"><code>property</code></em>
 exists on <em class="parameter"><code>channel</code></em>
, and stores <code class="literal">TRUE</code> or
<code class="literal">FALSE</code> in <em class="parameter"><code>exists</code></em>
.</p>
<div class="refsect3">
<a name="xfconf-backend-exists.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>backend</p></td>
<td class="parameter_description"><p>The <a class="link" href="xfconf-xfconf-backend.html#XfconfBackend"><span class="type">XfconfBackend</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>channel</p></td>
<td class="parameter_description"><p>A channel name.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>property</p></td>
<td class="parameter_description"><p>A property name.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>exists</p></td>
<td class="parameter_description"><p>A boolean return.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>error</p></td>
<td class="parameter_description"><p>An error return.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="xfconf-backend-exists.returns"></a><h4>Returns</h4>
<p> The backend should return <code class="literal">TRUE</code> if the operation
was successful, or <code class="literal">FALSE</code> otherwise.  On <code class="literal">FALSE</code>,
<em class="parameter"><code>error</code></em>
should be set to a description of the failure.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="xfconf-backend-reset"></a><h3>xfconf_backend_reset ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>
xfconf_backend_reset (<em class="parameter"><code><a class="link" href="xfconf-xfconf-backend.html#XfconfBackend"><span class="type">XfconfBackend</span></a> *backend</code></em>,
                      <em class="parameter"><code>const <span class="type">gchar</span> *channel</code></em>,
                      <em class="parameter"><code>const <span class="type">gchar</span> *property</code></em>,
                      <em class="parameter"><code><span class="type">gboolean</span> recursive</code></em>,
                      <em class="parameter"><code><span class="type">GError</span> **error</code></em>);</pre>
<p>Resets the property identified by <em class="parameter"><code>property</code></em>
 from <em class="parameter"><code>channel</code></em>
.
If <em class="parameter"><code>recursive</code></em>
 is <code class="literal">TRUE</code>, all sub-properties of <em class="parameter"><code>property</code></em>
 will be
reset as well.  If the empty string ("") or a forward slash ("/")
is specified for <em class="parameter"><code>property</code></em>
, the entire channel will be reset.</p>
<p>If none of the properties specified are locked or have root-owned
system-wide defaults set, this effectively removes the properties
from the configuration store entirely.</p>
<div class="refsect3">
<a name="xfconf-backend-reset.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>backend</p></td>
<td class="parameter_description"><p>The <a class="link" href="xfconf-xfconf-backend.html#XfconfBackend"><span class="type">XfconfBackend</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>channel</p></td>
<td class="parameter_description"><p>A channel name.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>property</p></td>
<td class="parameter_description"><p>A property name.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>recursive</p></td>
<td class="parameter_description"><p>Whether or not the reset is recursive.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>error</p></td>
<td class="parameter_description"><p>An error return.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="xfconf-backend-reset.returns"></a><h4>Returns</h4>
<p> The backend should return <code class="literal">TRUE</code> if the operation
was successful, or <code class="literal">FALSE</code> otherwise.  On <code class="literal">FALSE</code>,
<em class="parameter"><code>error</code></em>
should be set to a description of the failure.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="xfconf-backend-flush"></a><h3>xfconf_backend_flush ()</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>
xfconf_backend_flush (<em class="parameter"><code><a class="link" href="xfconf-xfconf-backend.html#XfconfBackend"><span class="type">XfconfBackend</span></a> *backend</code></em>,
                      <em class="parameter"><code><span class="type">GError</span> **error</code></em>);</pre>
<p>For backends that support persistent storage, ensures that all
configuration data stored in memory is saved to persistent storage.</p>
<div class="refsect3">
<a name="xfconf-backend-flush.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>backend</p></td>
<td class="parameter_description"><p>The <a class="link" href="xfconf-xfconf-backend.html#XfconfBackend"><span class="type">XfconfBackend</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>error</p></td>
<td class="parameter_description"><p>An error return.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="xfconf-backend-flush.returns"></a><h4>Returns</h4>
<p> The backend should return <code class="literal">TRUE</code> if the operation
was successful, or <code class="literal">FALSE</code> otherwise.  On <code class="literal">FALSE</code>,
<em class="parameter"><code>error</code></em>
should be set to a description of the failure.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="xfconf-backend-register-property-changed-func"></a><h3>xfconf_backend_register_property_changed_func ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
xfconf_backend_register_property_changed_func
                               (<em class="parameter"><code><a class="link" href="xfconf-xfconf-backend.html#XfconfBackend"><span class="type">XfconfBackend</span></a> *backend</code></em>,
                                <em class="parameter"><code><span class="type">XfconfPropertyChangedFunc</span> func</code></em>,
                                <em class="parameter"><code><span class="type">gpointer</span> user_data</code></em>);</pre>
<p>Registers a function to be called when a property changes.  The
backend implementation should keep a pointer to <em class="parameter"><code>func</code></em>
 and <em class="parameter"><code>user_data</code></em>

and call <em class="parameter"><code>func</code></em>
 when a property in the configuration store changes.</p>
<div class="refsect3">
<a name="xfconf-backend-register-property-changed-func.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>backend</p></td>
<td class="parameter_description"><p>The <a class="link" href="xfconf-xfconf-backend.html#XfconfBackend"><span class="type">XfconfBackend</span></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>func</p></td>
<td class="parameter_description"><p>A function of type <span class="type">XfconfPropertyChangeFunc</span>.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>Arbitrary caller-supplied data.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
</div>
<div class="refsect1">
<a name="xfconf-xfconf-backend.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="XfconfBackendInterface"></a><h3>struct XfconfBackendInterface</h3>
<pre class="programlisting">struct XfconfBackendInterface {
    GTypeInterface parent;
    
    gboolean (*initialize)(XfconfBackend *backend,
                           GError **error);
    
    gboolean (*set)(XfconfBackend *backend,
                    const gchar *channel,
                    const gchar *property,
                    const GValue *value,
                    GError **error);
    
    gboolean (*get)(XfconfBackend *backend,
                    const gchar *channel,
                    const gchar *property,
                    GValue *value,
                    GError **error);
    
    gboolean (*get_all)(XfconfBackend *backend,
                        const gchar *channel,
                        const gchar *property_base,
                        GHashTable *properties,
                        GError **error);
    
    gboolean (*exists)(XfconfBackend *backend,
                       const gchar *channel,
                       const gchar *property,
                       gboolean *exists,
                       GError **error);
    
    gboolean (*reset)(XfconfBackend *backend,
                      const gchar *channel,
                      const gchar *property,
                      gboolean recursive,
                      GError **error);

    gboolean (*list_channels)(XfconfBackend *backend,
                              GSList **channels,
                              GError **error);

    gboolean (*is_property_locked)(XfconfBackend *backend,
                                   const gchar *channel,
                                   const gchar *property,
                                   gboolean *locked,
                                   GError **error);
    
    gboolean (*flush)(XfconfBackend *backend,
                      GError **error);

    void (*register_property_changed_func)(XfconfBackend *backend,
                                           XfconfPropertyChangedFunc func,
                                           gpointer user_data);
    
    /*&lt; reserved for future expansion &gt;*/
    void (*_xb_reserved0)();
    void (*_xb_reserved1)();
    void (*_xb_reserved2)();
    void (*_xb_reserved3)();
};
</pre>
<p>An interface for implementing pluggable configuration store backends
into the Xfconf Daemon.</p>
<p>See the <a class="link" href="xfconf-xfconf-backend.html#XfconfBackend"><span class="type">XfconfBackend</span></a> function documentation for a description of what
each virtual function in <a class="link" href="xfconf-xfconf-backend.html#XfconfBackendInterface" title="struct XfconfBackendInterface"><span class="type">XfconfBackendInterface</span></a> should do.</p>
<div class="refsect3">
<a name="XfconfBackendInterface.members"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" 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><span class="type">GTypeInterface</span> <em class="structfield"><code><a name="XfconfBackendInterface.parent"></a>parent</code></em>;</p></td>
<td class="struct_member_description"><p>GObject interface parent.</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="XfconfBackendInterface.initialize"></a>initialize</code></em> ()</p></td>
<td class="struct_member_description"><p>See <a class="link" href="xfconf-xfconf-backend.html#xfconf-backend-initialize" title="xfconf_backend_initialize ()"><code class="function">xfconf_backend_initialize()</code></a>.</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="XfconfBackendInterface.set"></a>set</code></em> ()</p></td>
<td class="struct_member_description"><p>See <a class="link" href="xfconf-xfconf-backend.html#xfconf-backend-set" title="xfconf_backend_set ()"><code class="function">xfconf_backend_set()</code></a>.</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="XfconfBackendInterface.get"></a>get</code></em> ()</p></td>
<td class="struct_member_description"><p>See <a class="link" href="xfconf-xfconf-backend.html#xfconf-backend-get" title="xfconf_backend_get ()"><code class="function">xfconf_backend_get()</code></a>.</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="XfconfBackendInterface.get-all"></a>get_all</code></em> ()</p></td>
<td class="struct_member_description"><p>See <a class="link" href="xfconf-xfconf-backend.html#xfconf-backend-get-all" title="xfconf_backend_get_all ()"><code class="function">xfconf_backend_get_all()</code></a>.</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="XfconfBackendInterface.exists"></a>exists</code></em> ()</p></td>
<td class="struct_member_description"><p>See <a class="link" href="xfconf-xfconf-backend.html#xfconf-backend-exists" title="xfconf_backend_exists ()"><code class="function">xfconf_backend_exists()</code></a>.</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="XfconfBackendInterface.reset"></a>reset</code></em> ()</p></td>
<td class="struct_member_description"><p>See <a class="link" href="xfconf-xfconf-backend.html#xfconf-backend-reset" title="xfconf_backend_reset ()"><code class="function">xfconf_backend_reset()</code></a>.</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="XfconfBackendInterface.list-channels"></a>list_channels</code></em> ()</p></td>
<td class="struct_member_description"><p>See <code class="function">xfconf_backend_list_channels()</code>.</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="XfconfBackendInterface.is-property-locked"></a>is_property_locked</code></em> ()</p></td>
<td class="struct_member_description"><p>See <code class="function">xfconf_backend_is_property_locked()</code>.</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="XfconfBackendInterface.flush"></a>flush</code></em> ()</p></td>
<td class="struct_member_description"><p>See <a class="link" href="xfconf-xfconf-backend.html#xfconf-backend-flush" title="xfconf_backend_flush ()"><code class="function">xfconf_backend_flush()</code></a>.</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="XfconfBackendInterface.register-property-changed-func"></a>register_property_changed_func</code></em> ()</p></td>
<td class="struct_member_description"><p>See <a class="link" href="xfconf-xfconf-backend.html#xfconf-backend-register-property-changed-func" title="xfconf_backend_register_property_changed_func ()"><code class="function">xfconf_backend_register_property_changed_func()</code></a>.</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="XfconfBackendInterface.-xb-reserved0"></a>_xb_reserved0</code></em> ()</p></td>
<td class="struct_member_description"><p>Reserved for future expansion.</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="XfconfBackendInterface.-xb-reserved1"></a>_xb_reserved1</code></em> ()</p></td>
<td class="struct_member_description"><p>Reserved for future expansion.</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="XfconfBackendInterface.-xb-reserved2"></a>_xb_reserved2</code></em> ()</p></td>
<td class="struct_member_description"><p>Reserved for future expansion.</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="XfconfBackendInterface.-xb-reserved3"></a>_xb_reserved3</code></em> ()</p></td>
<td class="struct_member_description"><p>Reserved for future expansion.</p></td>
<td class="struct_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="XfconfBackend-struct"></a><h3>XfconfBackend</h3>
<pre class="programlisting">typedef struct _XfconfBackend XfconfBackend;</pre>
<p>An instance of a class implementing a <a class="link" href="xfconf-xfconf-backend.html#XfconfBackendInterface" title="struct XfconfBackendInterface"><span class="type">XfconfBackendInterface</span></a>.</p>
</div>
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