/usr/share/gtk-doc/html/cogl-2.0-experimental/cogl-2.0-experimental-The-Object-Interface.html is in libcogl-doc 1.16.2-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 | <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>The Object Interface</title>
<meta name="generator" content="DocBook XSL Stylesheets V1.78.1">
<link rel="home" href="index.html" title="Cogl 2.0 Reference Manual">
<link rel="up" href="cogl-general-apis.html" title="General API concepts">
<link rel="prev" href="cogl-general-apis.html" title="General API concepts">
<link rel="next" href="cogl-2.0-experimental-Exception-handling.html" title="Exception handling">
<meta name="generator" content="GTK-Doc V1.19 (XML mode)">
<link rel="stylesheet" href="style.css" type="text/css">
</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="cogl-general-apis.html"><img src="left.png" width="24" height="24" border="0" alt="Prev"></a></td>
<td><a accesskey="u" href="cogl-general-apis.html"><img src="up.png" width="24" height="24" border="0" alt="Up"></a></td>
<td><a accesskey="h" href="index.html"><img src="home.png" width="24" height="24" border="0" alt="Home"></a></td>
<th width="100%" align="center">Cogl 2.0 Reference Manual</th>
<td><a accesskey="n" href="cogl-2.0-experimental-Exception-handling.html"><img src="right.png" width="24" height="24" border="0" alt="Next"></a></td>
</tr>
<tr><td colspan="5" class="shortcuts">
<a href="#cogl-2.0-experimental-The-Object-Interface.synopsis" class="shortcut">Top</a>
|
<a href="#cogl-2.0-experimental-The-Object-Interface.description" class="shortcut">Description</a>
</td></tr>
</table>
<div class="refentry">
<a name="cogl-2.0-experimental-The-Object-Interface"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="cogl-2.0-experimental-The-Object-Interface.top_of_page"></a>The Object Interface</span></h2>
<p>The Object Interface</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv">
<a name="cogl-2.0-experimental-The-Object-Interface.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis"> <a class="link" href="cogl-2.0-experimental-The-Object-Interface.html#CoglObject" title="CoglObject">CoglObject</a>;
<span class="returnvalue">void</span> * <a class="link" href="cogl-2.0-experimental-The-Object-Interface.html#cogl-object-ref" title="cogl_object_ref ()">cogl_object_ref</a> (<em class="parameter"><code><span class="type">void</span> *object</code></em>);
<span class="returnvalue">void</span> <a class="link" href="cogl-2.0-experimental-The-Object-Interface.html#cogl-object-unref" title="cogl_object_unref ()">cogl_object_unref</a> (<em class="parameter"><code><span class="type">void</span> *object</code></em>);
<a class="link" href="cogl-2.0-experimental-The-Object-Interface.html#CoglUserDataKey" title="CoglUserDataKey">CoglUserDataKey</a>;
typedef <a class="link" href="cogl-2.0-experimental-The-Object-Interface.html#CoglUserDataDestroyCallback" title="CoglUserDataDestroyCallback">CoglUserDataDestroyCallback</a>;
<span class="returnvalue">void</span> * <a class="link" href="cogl-2.0-experimental-The-Object-Interface.html#cogl-object-get-user-data" title="cogl_object_get_user_data ()">cogl_object_get_user_data</a> (<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-The-Object-Interface.html#CoglObject" title="CoglObject"><span class="type">CoglObject</span></a> *object</code></em>,
<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-The-Object-Interface.html#CoglUserDataKey" title="CoglUserDataKey"><span class="type">CoglUserDataKey</span></a> *key</code></em>);
<span class="returnvalue">void</span> <a class="link" href="cogl-2.0-experimental-The-Object-Interface.html#cogl-object-set-user-data" title="cogl_object_set_user_data ()">cogl_object_set_user_data</a> (<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-The-Object-Interface.html#CoglObject" title="CoglObject"><span class="type">CoglObject</span></a> *object</code></em>,
<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-The-Object-Interface.html#CoglUserDataKey" title="CoglUserDataKey"><span class="type">CoglUserDataKey</span></a> *key</code></em>,
<em class="parameter"><code><span class="type">void</span> *user_data</code></em>,
<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-The-Object-Interface.html#CoglUserDataDestroyCallback" title="CoglUserDataDestroyCallback"><span class="type">CoglUserDataDestroyCallback</span></a> destroy</code></em>);
</pre>
</div>
<div class="refsect1">
<a name="cogl-2.0-experimental-The-Object-Interface.description"></a><h2>Description</h2>
</div>
<div class="refsect1">
<a name="cogl-2.0-experimental-The-Object-Interface.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="CoglObject"></a><h3>CoglObject</h3>
<pre class="programlisting">typedef struct _CoglObject CoglObject;</pre>
</div>
<hr>
<div class="refsect2">
<a name="cogl-object-ref"></a><h3>cogl_object_ref ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> * cogl_object_ref (<em class="parameter"><code><span class="type">void</span> *object</code></em>);</pre>
<p>
Increases the reference count of <em class="parameter"><code>object</code></em> by 1
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>object</code></em> :</span></p></td>
<td>a <a class="link" href="cogl-2.0-experimental-The-Object-Interface.html#CoglObject" title="CoglObject"><span class="type">CoglObject</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the <em class="parameter"><code>object</code></em>, with its reference count increased</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="cogl-object-unref"></a><h3>cogl_object_unref ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> cogl_object_unref (<em class="parameter"><code><span class="type">void</span> *object</code></em>);</pre>
<p>
Drecreases the reference count of <em class="parameter"><code>object</code></em> by 1; if the reference
count reaches 0, the resources allocated by <em class="parameter"><code>object</code></em> will be freed
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>object</code></em> :</span></p></td>
<td>a <a class="link" href="cogl-2.0-experimental-The-Object-Interface.html#CoglObject" title="CoglObject"><span class="type">CoglObject</span></a>
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="CoglUserDataKey"></a><h3>CoglUserDataKey</h3>
<pre class="programlisting">typedef struct {
int unused;
} CoglUserDataKey;
</pre>
<p>
A <a class="link" href="cogl-2.0-experimental-The-Object-Interface.html#CoglUserDataKey" title="CoglUserDataKey"><span class="type">CoglUserDataKey</span></a> is used to declare a key for attaching data to a
<a class="link" href="cogl-2.0-experimental-The-Object-Interface.html#CoglObject" title="CoglObject"><span class="type">CoglObject</span></a> using cogl_object_set_user_data. The typedef only exists as a
formality to make code self documenting since only the unique address of a
<a class="link" href="cogl-2.0-experimental-The-Object-Interface.html#CoglUserDataKey" title="CoglUserDataKey"><span class="type">CoglUserDataKey</span></a> is used.
</p>
<p>
Typically you would declare a static <a class="link" href="cogl-2.0-experimental-The-Object-Interface.html#CoglUserDataKey" title="CoglUserDataKey"><span class="type">CoglUserDataKey</span></a> and set private data
on an object something like this:
</p>
<p>
</p>
<div class="informalexample"><pre class="programlisting">
static CoglUserDataKey path_private_key;
static void
destroy_path_private_cb (void *data)
{
g_free (data);
}
static void
my_path_set_data (CoglPath *path, void *data)
{
cogl_object_set_user_data (COGL_OBJECT (path),
&private_key,
data,
destroy_path_private_cb);
}
</pre></div>
<p>
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody><tr>
<td><p><span class="term"><span class="type">int</span> <em class="structfield"><code><a name="CoglUserDataKey.unused"></a>unused</code></em>;</span></p></td>
<td>ignored.</td>
</tr></tbody>
</table></div>
<p class="since">Since 1.4</p>
</div>
<hr>
<div class="refsect2">
<a name="CoglUserDataDestroyCallback"></a><h3>CoglUserDataDestroyCallback</h3>
<pre class="programlisting">typedef GDestroyNotify CoglUserDataDestroyCallback;
</pre>
<p>
When associating private data with a <a class="link" href="cogl-2.0-experimental-The-Object-Interface.html#CoglObject" title="CoglObject"><span class="type">CoglObject</span></a> a callback can be
given which will be called either if the object is destroyed or if
<a class="link" href="cogl-2.0-experimental-The-Object-Interface.html#cogl-object-set-user-data" title="cogl_object_set_user_data ()"><code class="function">cogl_object_set_user_data()</code></a> is called with NULL user_data for the
same key.
</p>
<p class="since">Since 1.4</p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-object-get-user-data"></a><h3>cogl_object_get_user_data ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> * cogl_object_get_user_data (<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-The-Object-Interface.html#CoglObject" title="CoglObject"><span class="type">CoglObject</span></a> *object</code></em>,
<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-The-Object-Interface.html#CoglUserDataKey" title="CoglUserDataKey"><span class="type">CoglUserDataKey</span></a> *key</code></em>);</pre>
<p>
Finds the user data previously associated with <em class="parameter"><code>object</code></em> using
the given <em class="parameter"><code>key</code></em>. If no user data has been associated with <em class="parameter"><code>object</code></em>
for the given <em class="parameter"><code>key</code></em> this function returns NULL.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>object</code></em> :</span></p></td>
<td>The object with associated private data to query</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>key</code></em> :</span></p></td>
<td>The address of a <a class="link" href="cogl-2.0-experimental-The-Object-Interface.html#CoglUserDataKey" title="CoglUserDataKey"><span class="type">CoglUserDataKey</span></a> which provides a unique value
with which to index the private data.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The user data previously associated
with <em class="parameter"><code>object</code></em> using the given <em class="parameter"><code>key</code></em>; or <code class="literal">NULL</code> if no associated
data is found. <span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span>
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.4</p>
</div>
<hr>
<div class="refsect2">
<a name="cogl-object-set-user-data"></a><h3>cogl_object_set_user_data ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> cogl_object_set_user_data (<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-The-Object-Interface.html#CoglObject" title="CoglObject"><span class="type">CoglObject</span></a> *object</code></em>,
<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-The-Object-Interface.html#CoglUserDataKey" title="CoglUserDataKey"><span class="type">CoglUserDataKey</span></a> *key</code></em>,
<em class="parameter"><code><span class="type">void</span> *user_data</code></em>,
<em class="parameter"><code><a class="link" href="cogl-2.0-experimental-The-Object-Interface.html#CoglUserDataDestroyCallback" title="CoglUserDataDestroyCallback"><span class="type">CoglUserDataDestroyCallback</span></a> destroy</code></em>);</pre>
<p>
Associates some private <em class="parameter"><code>user_data</code></em> with a given <a class="link" href="cogl-2.0-experimental-The-Object-Interface.html#CoglObject" title="CoglObject"><span class="type">CoglObject</span></a>. To
later remove the association call <a class="link" href="cogl-2.0-experimental-The-Object-Interface.html#cogl-object-set-user-data" title="cogl_object_set_user_data ()"><code class="function">cogl_object_set_user_data()</code></a> with
the same <em class="parameter"><code>key</code></em> but NULL for the <em class="parameter"><code>user_data</code></em>.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>object</code></em> :</span></p></td>
<td>The object to associate private data with</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>key</code></em> :</span></p></td>
<td>The address of a <a class="link" href="cogl-2.0-experimental-The-Object-Interface.html#CoglUserDataKey" title="CoglUserDataKey"><span class="type">CoglUserDataKey</span></a> which provides a unique value
with which to index the private data.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
<td>The data to associate with the given object,
or <code class="literal">NULL</code> to remove a previous association.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>destroy</code></em> :</span></p></td>
<td>A <a class="link" href="cogl-2.0-experimental-The-Object-Interface.html#CoglUserDataDestroyCallback" title="CoglUserDataDestroyCallback"><span class="type">CoglUserDataDestroyCallback</span></a> to call if the object is
destroyed or if the association is removed by later setting
<code class="literal">NULL</code> data for the same key.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.4</p>
</div>
</div>
</div>
<div class="footer">
<hr>
Generated by GTK-Doc V1.19</div>
</body>
</html>
|