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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>UniqueBackend</title>
<meta name="generator" content="DocBook XSL Stylesheets V1.75.2">
<link rel="home" href="index.html" title="Unique 1.1.6 Reference Manual">
<link rel="up" href="unique-overview.html" title="Unique Overview">
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<link rel="appendix" href="license.html" title="Appendix A. License">
</head>
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
<table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="2">
<tr valign="middle">
<td><a accesskey="p" href="unique-Message-Data.html"><img src="left.png" width="24" height="24" border="0" alt="Prev"></a></td>
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<th width="100%" align="center">Unique 1.1.6
 Reference Manual</th>
<td><a accesskey="n" href="unique-Versioning-Information.html"><img src="right.png" width="24" height="24" border="0" alt="Next"></a></td>
</tr>
<tr><td colspan="5" class="shortcuts">
<a href="#UniqueBackend.synopsis" class="shortcut">Top</a>
                 | 
                <a href="#UniqueBackend.description" class="shortcut">Description</a>
                 | 
                <a href="#UniqueBackend.object-hierarchy" class="shortcut">Object Hierarchy</a>
</td></tr>
</table>
<div class="refentry" title="UniqueBackend">
<a name="UniqueBackend"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="UniqueBackend.top_of_page"></a>UniqueBackend</span></h2>
<p>UniqueBackend — Backend abstraction</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv" title="Synopsis">
<a name="UniqueBackend.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">
                    <a class="link" href="UniqueBackend.html#UniqueBackend-struct" title="UniqueBackend">UniqueBackend</a>;
                    <a class="link" href="UniqueBackend.html#UniqueBackendClass" title="UniqueBackendClass">UniqueBackendClass</a>;
<a class="link" href="UniqueBackend.html" title="UniqueBackend">UniqueBackend</a> *     <a class="link" href="UniqueBackend.html#unique-backend-create" title="unique_backend_create ()">unique_backend_create</a>               (void);
const <a
href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"
>gchar</a> *       <a class="link" href="UniqueBackend.html#unique-backend-get-name" title="unique_backend_get_name ()">unique_backend_get_name</a>             (<a class="link" href="UniqueBackend.html" title="UniqueBackend">UniqueBackend</a> *backend);
void                <a class="link" href="UniqueBackend.html#unique-backend-set-name" title="unique_backend_set_name ()">unique_backend_set_name</a>             (<a class="link" href="UniqueBackend.html" title="UniqueBackend">UniqueBackend</a> *backend,
                                                         const <a
href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"
>gchar</a> *name);
const <a
href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"
>gchar</a> *       <a class="link" href="UniqueBackend.html#unique-backend-get-startup-id" title="unique_backend_get_startup_id ()">unique_backend_get_startup_id</a>       (<a class="link" href="UniqueBackend.html" title="UniqueBackend">UniqueBackend</a> *backend);
void                <a class="link" href="UniqueBackend.html#unique-backend-set-startup-id" title="unique_backend_set_startup_id ()">unique_backend_set_startup_id</a>       (<a class="link" href="UniqueBackend.html" title="UniqueBackend">UniqueBackend</a> *backend,
                                                         const <a
href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"
>gchar</a> *startup_id);
<a
href="http://library.gnome.org/devel/gdk/unstable/GdkScreen.html"
>GdkScreen</a> *         <a class="link" href="UniqueBackend.html#unique-backend-get-screen" title="unique_backend_get_screen ()">unique_backend_get_screen</a>           (<a class="link" href="UniqueBackend.html" title="UniqueBackend">UniqueBackend</a> *backend);
void                <a class="link" href="UniqueBackend.html#unique-backend-set-screen" title="unique_backend_set_screen ()">unique_backend_set_screen</a>           (<a class="link" href="UniqueBackend.html" title="UniqueBackend">UniqueBackend</a> *backend,
                                                         <a
href="http://library.gnome.org/devel/gdk/unstable/GdkScreen.html"
>GdkScreen</a> *screen);
<a
href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"
>guint</a>               <a class="link" href="UniqueBackend.html#unique-backend-get-workspace" title="unique_backend_get_workspace ()">unique_backend_get_workspace</a>        (<a class="link" href="UniqueBackend.html" title="UniqueBackend">UniqueBackend</a> *backend);
<a
href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"
>gboolean</a>            <a class="link" href="UniqueBackend.html#unique-backend-request-name" title="unique_backend_request_name ()">unique_backend_request_name</a>         (<a class="link" href="UniqueBackend.html" title="UniqueBackend">UniqueBackend</a> *backend);
<a class="link" href="UniqueApp.html#UniqueResponse" title="enum UniqueResponse">UniqueResponse</a>      <a class="link" href="UniqueBackend.html#unique-backend-send-message" title="unique_backend_send_message ()">unique_backend_send_message</a>         (<a class="link" href="UniqueBackend.html" title="UniqueBackend">UniqueBackend</a> *backend,
                                                         <a
href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"
>gint</a> command_id,
                                                         <a class="link" href="unique-Message-Data.html#UniqueMessageData" title="UniqueMessageData">UniqueMessageData</a> *message_data,
                                                         <a
href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"
>guint</a> time_);
</pre>
</div>
<div class="refsect1" title="Object Hierarchy">
<a name="UniqueBackend.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="synopsis">
  <a
href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject"
>GObject</a>
   +----UniqueBackend
</pre>
</div>
<div class="refsect1" title="Description">
<a name="UniqueBackend.description"></a><h2>Description</h2>
<p>
<a class="link" href="UniqueBackend.html" title="UniqueBackend"><span class="type">UniqueBackend</span></a> is the base, abstract class implemented by the different
IPC mechanisms used by Unique. Each <a class="link" href="UniqueApp.html" title="UniqueApp"><span class="type">UniqueApp</span></a> instance creates a
<a class="link" href="UniqueBackend.html" title="UniqueBackend"><span class="type">UniqueBackend</span></a> to request the name or to send messages.</p>
<p>
</p>
</div>
<div class="refsect1" title="Details">
<a name="UniqueBackend.details"></a><h2>Details</h2>
<div class="refsect2" title="UniqueBackend">
<a name="UniqueBackend-struct"></a><h3>UniqueBackend</h3>
<pre class="programlisting">typedef struct _UniqueBackend UniqueBackend;</pre>
<p>
The <a class="link" href="UniqueBackend.html" title="UniqueBackend"><span class="type">UniqueBackend</span></a> structure contains only private data and should only
be accessed using the provided functions.</p>
<p>
</p>
</div>
<hr>
<div class="refsect2" title="UniqueBackendClass">
<a name="UniqueBackendClass"></a><h3>UniqueBackendClass</h3>
<pre class="programlisting">typedef struct {
  /* vtable, not signals */
  gboolean       (* request_name) (UniqueBackend     *backend);
  UniqueResponse (* send_message) (UniqueBackend     *backend,
                                   gint               command_id,
                                   UniqueMessageData *message_data,
                                   guint              time_);
} UniqueBackendClass;
</pre>
<p>
The class that should be implemented by every backend for <a class="link" href="UniqueApp.html" title="UniqueApp"><span class="type">UniqueApp</span></a>.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="structfield"><code>request_name</code></em> ()</span></p></td>
<td> This method should be used to request the name for the
  instance set using <a class="link" href="UniqueBackend.html#unique-backend-set-name" title="unique_backend_set_name ()"><code class="function">unique_backend_set_name()</code></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="structfield"><code>send_message</code></em> ()</span></p></td>
<td> This method should be used to send a message to a running
  instance
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="unique_backend_create ()">
<a name="unique-backend-create"></a><h3>unique_backend_create ()</h3>
<pre class="programlisting"><a class="link" href="UniqueBackend.html" title="UniqueBackend">UniqueBackend</a> *     unique_backend_create               (void);</pre>
<p>
Creates a <a class="link" href="UniqueBackend.html" title="UniqueBackend"><span class="type">UniqueBackend</span></a> using the default backend defined at
compile time. You can override the default backend by setting the
<code class="literal">UNIQUE_BACKEND</code> environment variable with the
name of the desired backend.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> the newly created <a class="link" href="UniqueBackend.html" title="UniqueBackend"><span class="type">UniqueBackend</span></a> instance
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="unique_backend_get_name ()">
<a name="unique-backend-get-name"></a><h3>unique_backend_get_name ()</h3>
<pre class="programlisting">const <a
href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"
>gchar</a> *       unique_backend_get_name             (<a class="link" href="UniqueBackend.html" title="UniqueBackend">UniqueBackend</a> *backend);</pre>
<p>
FIXME</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>backend</code></em> :</span></p></td>
<td> FIXME
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> FIXME
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="unique_backend_set_name ()">
<a name="unique-backend-set-name"></a><h3>unique_backend_set_name ()</h3>
<pre class="programlisting">void                unique_backend_set_name             (<a class="link" href="UniqueBackend.html" title="UniqueBackend">UniqueBackend</a> *backend,
                                                         const <a
href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"
>gchar</a> *name);</pre>
<p>
FIXME</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>backend</code></em> :</span></p></td>
<td> FIXME
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>name</code></em> :</span></p></td>
<td> FIXME
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="unique_backend_get_startup_id ()">
<a name="unique-backend-get-startup-id"></a><h3>unique_backend_get_startup_id ()</h3>
<pre class="programlisting">const <a
href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"
>gchar</a> *       unique_backend_get_startup_id       (<a class="link" href="UniqueBackend.html" title="UniqueBackend">UniqueBackend</a> *backend);</pre>
<p>
FIXME</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>backend</code></em> :</span></p></td>
<td> FIXME
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> FIXME
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="unique_backend_set_startup_id ()">
<a name="unique-backend-set-startup-id"></a><h3>unique_backend_set_startup_id ()</h3>
<pre class="programlisting">void                unique_backend_set_startup_id       (<a class="link" href="UniqueBackend.html" title="UniqueBackend">UniqueBackend</a> *backend,
                                                         const <a
href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"
>gchar</a> *startup_id);</pre>
<p>
FIXME</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>backend</code></em> :</span></p></td>
<td> FIXME
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>startup_id</code></em> :</span></p></td>
<td> FIXME
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="unique_backend_get_screen ()">
<a name="unique-backend-get-screen"></a><h3>unique_backend_get_screen ()</h3>
<pre class="programlisting"><a
href="http://library.gnome.org/devel/gdk/unstable/GdkScreen.html"
>GdkScreen</a> *         unique_backend_get_screen           (<a class="link" href="UniqueBackend.html" title="UniqueBackend">UniqueBackend</a> *backend);</pre>
<p>
FIXME</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>backend</code></em> :</span></p></td>
<td> FIXME
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> FIXME
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="unique_backend_set_screen ()">
<a name="unique-backend-set-screen"></a><h3>unique_backend_set_screen ()</h3>
<pre class="programlisting">void                unique_backend_set_screen           (<a class="link" href="UniqueBackend.html" title="UniqueBackend">UniqueBackend</a> *backend,
                                                         <a
href="http://library.gnome.org/devel/gdk/unstable/GdkScreen.html"
>GdkScreen</a> *screen);</pre>
<p>
FIXME</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>backend</code></em> :</span></p></td>
<td> FIXME
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>screen</code></em> :</span></p></td>
<td> FIXME
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="unique_backend_get_workspace ()">
<a name="unique-backend-get-workspace"></a><h3>unique_backend_get_workspace ()</h3>
<pre class="programlisting"><a
href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"
>guint</a>               unique_backend_get_workspace        (<a class="link" href="UniqueBackend.html" title="UniqueBackend">UniqueBackend</a> *backend);</pre>
<p>
Retrieves the current workspace.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>backend</code></em> :</span></p></td>
<td> a <a class="link" href="UniqueBackend.html" title="UniqueBackend"><span class="type">UniqueBackend</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> a workspace number
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="unique_backend_request_name ()">
<a name="unique-backend-request-name"></a><h3>unique_backend_request_name ()</h3>
<pre class="programlisting"><a
href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"
>gboolean</a>            unique_backend_request_name         (<a class="link" href="UniqueBackend.html" title="UniqueBackend">UniqueBackend</a> *backend);</pre>
<p>
Requests the name set using <a class="link" href="UniqueBackend.html#unique-backend-set-name" title="unique_backend_set_name ()"><code class="function">unique_backend_set_name()</code></a> using <em class="parameter"><code>backend</code></em>.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>backend</code></em> :</span></p></td>
<td> a <a class="link" href="UniqueBackend.html" title="UniqueBackend"><span class="type">UniqueBackend</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> <a
href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#TRUE--CAPS"
><code class="literal">TRUE</code></a> if the name was assigned to us, <a
href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#FALSE--CAPS"
><code class="literal">FALSE</code></a> if there
  already is a registered name
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2" title="unique_backend_send_message ()">
<a name="unique-backend-send-message"></a><h3>unique_backend_send_message ()</h3>
<pre class="programlisting"><a class="link" href="UniqueApp.html#UniqueResponse" title="enum UniqueResponse">UniqueResponse</a>      unique_backend_send_message         (<a class="link" href="UniqueBackend.html" title="UniqueBackend">UniqueBackend</a> *backend,
                                                         <a
href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"
>gint</a> command_id,
                                                         <a class="link" href="unique-Message-Data.html#UniqueMessageData" title="UniqueMessageData">UniqueMessageData</a> *message_data,
                                                         <a
href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"
>guint</a> time_);</pre>
<p>
Sends <em class="parameter"><code>command_id</code></em>, and optionally <em class="parameter"><code>message_data</code></em>, to a running instance
using <em class="parameter"><code>backend</code></em>.</p>
<p>
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>backend</code></em> :</span></p></td>
<td> a <a class="link" href="UniqueBackend.html" title="UniqueBackend"><span class="type">UniqueBackend</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>command_id</code></em> :</span></p></td>
<td> command to send
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>message_data</code></em> :</span></p></td>
<td> message to send, or <a
href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#NULL--CAPS"
><code class="literal">NULL</code></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>time_</code></em> :</span></p></td>
<td> time of the command emission, or 0 for the current time
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td> a <a class="link" href="UniqueApp.html#UniqueResponse" title="enum UniqueResponse"><span class="type">UniqueResponse</span></a> value sent by the running instance
</td>
</tr>
</tbody>
</table></div>
</div>
</div>
</div>
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