gobject-The-Base-Object-Type.html [plain text]
<html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>GObject</title><meta name="generator" content="DocBook XSL Stylesheets V1.65.1"><link rel="home" href="index.html" title="GObject Reference Manual"><link rel="up" href="rn01.html" title="API Reference"><link rel="previous" href="GTypeModule.html" title="GTypeModule"><link rel="next" href="gobject-Enumeration-and-Flag-Types.html" title="Enums and Flags"><link rel="preface" href="pr01.html" title="Introduction"><link rel="reference" href="rn01.html" title="API Reference"><link rel="refentry" href="gobject-Type-Information.html" title="GType"><link rel="refentry" href="GTypePlugin.html" title="GTypePlugin"><link rel="refentry" href="GTypeModule.html" title="GTypeModule"><link rel="refentry" href="gobject-The-Base-Object-Type.html" title="GObject"><link rel="refentry" href="gobject-Enumeration-and-Flag-Types.html" title="Enums and Flags"><link rel="refentry" href="gobject-Boxed-Types.html" title="GBoxed"><link rel="refentry" href="gobject-Generic-values.html" title="Generic Values"><link rel="refentry" href="gobject-Standard-Parameter-and-Value-Types.html" title="Parameters and Values"><link rel="refentry" href="gobject-Varargs-Value-Collection.html" title="Varargs Value Collection"><link rel="refentry" href="gobject-GParamSpec.html" title="GParamSpec"><link rel="refentry" href="gobject-Signals.html" title="Signals"><link rel="refentry" href="gobject-Closures.html" title="Closures"><link rel="refentry" href="gobject-Value-arrays.html" title="Value arrays"><link rel="reference" href="rn02.html" title="Tools Reference"><link rel="refentry" href="glib-mkenums.html" title="glib-mkenums"><link rel="refentry" href="glib-genmarshal.html" title="glib-genmarshal"><link rel="refentry" href="gobject-query.html" title="gobject-query"><link rel="index" href="ix01.html" title="Index"><link rel="section" href="gobject-The-Base-Object-Type.html#id2786956" title="Object Hierarchy"><link rel="section" href="gobject-The-Base-Object-Type.html#id2786975" title="Signal Prototypes"><link rel="section" href="gobject-The-Base-Object-Type.html#id2787026" title="Description"><link rel="section" href="gobject-The-Base-Object-Type.html#id2787036" title="Details"><link rel="section" href="gobject-The-Base-Object-Type.html#id2794113" title="Signals"><meta name="generator" content="GTK-Doc V1.2 (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" width="100%" summary="Navigation header" cellpadding="2" cellspacing="2"><tr valign="middle"><td><a accesskey="p" href="GTypeModule.html"><img src="left.png" width="24" height="24" border="0" alt="Prev"></a></td><td><a accesskey="u" href="rn01.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">GObject Reference Manual</th><td><a accesskey="n" href="gobject-Enumeration-and-Flag-Types.html"><img src="right.png" width="24" height="24" border="0" alt="Next"></a></td></tr></table><div class="refentry" lang="en"><a name="gobject-The-Base-Object-Type"></a><div class="titlepage"><div></div><div></div></div><div class="refnamediv"><h2><span class="refentrytitle">GObject</span></h2><p>GObject — The base object type</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><a name="GObject"></a><pre class="synopsis">
#include <glib-object.h>
struct <a href="gobject-The-Base-Object-Type.html#GObject-struct">GObject</a>;
struct <a href="gobject-The-Base-Object-Type.html#GObjectClass">GObjectClass</a>;
struct <a href="gobject-The-Base-Object-Type.html#GObjectConstructParam">GObjectConstructParam</a>;
void (<a href="gobject-The-Base-Object-Type.html#GObjectGetPropertyFunc">*GObjectGetPropertyFunc</a>) (<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a> *object,
<a
href="../glib/glib-Basic-Types.html#guint"
>guint</a> property_id,
<a href="gobject-Generic-values.html#GValue">GValue</a> *value,
<a href="gobject-GParamSpec.html#GParamSpec">GParamSpec</a> *pspec);
void (<a href="gobject-The-Base-Object-Type.html#GObjectSetPropertyFunc">*GObjectSetPropertyFunc</a>) (<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a> *object,
<a
href="../glib/glib-Basic-Types.html#guint"
>guint</a> property_id,
const <a href="gobject-Generic-values.html#GValue">GValue</a> *value,
<a href="gobject-GParamSpec.html#GParamSpec">GParamSpec</a> *pspec);
void (<a href="gobject-The-Base-Object-Type.html#GObjectFinalizeFunc">*GObjectFinalizeFunc</a>) (<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a> *object);
#define <a href="gobject-The-Base-Object-Type.html#G-TYPE-IS-OBJECT-CAPS">G_TYPE_IS_OBJECT</a> (type)
#define <a href="gobject-The-Base-Object-Type.html#G-OBJECT-CAPS">G_OBJECT</a> (object)
#define <a href="gobject-The-Base-Object-Type.html#G-IS-OBJECT-CAPS">G_IS_OBJECT</a> (object)
#define <a href="gobject-The-Base-Object-Type.html#G-OBJECT-CLASS-CAPS">G_OBJECT_CLASS</a> (class)
#define <a href="gobject-The-Base-Object-Type.html#G-IS-OBJECT-CLASS-CAPS">G_IS_OBJECT_CLASS</a> (class)
#define <a href="gobject-The-Base-Object-Type.html#G-OBJECT-GET-CLASS-CAPS">G_OBJECT_GET_CLASS</a> (object)
#define <a href="gobject-The-Base-Object-Type.html#G-OBJECT-TYPE-CAPS">G_OBJECT_TYPE</a> (object)
#define <a href="gobject-The-Base-Object-Type.html#G-OBJECT-TYPE-NAME-CAPS">G_OBJECT_TYPE_NAME</a> (object)
#define <a href="gobject-The-Base-Object-Type.html#G-OBJECT-CLASS-TYPE-CAPS">G_OBJECT_CLASS_TYPE</a> (class)
#define <a href="gobject-The-Base-Object-Type.html#G-OBJECT-CLASS-NAME-CAPS">G_OBJECT_CLASS_NAME</a> (class)
void <a href="gobject-The-Base-Object-Type.html#g-object-class-install-property">g_object_class_install_property</a> (<a href="gobject-The-Base-Object-Type.html#GObjectClass">GObjectClass</a> *oclass,
<a
href="../glib/glib-Basic-Types.html#guint"
>guint</a> property_id,
<a href="gobject-GParamSpec.html#GParamSpec">GParamSpec</a> *pspec);
<a href="gobject-GParamSpec.html#GParamSpec">GParamSpec</a>* <a href="gobject-The-Base-Object-Type.html#g-object-class-find-property">g_object_class_find_property</a> (<a href="gobject-The-Base-Object-Type.html#GObjectClass">GObjectClass</a> *oclass,
const <a
href="../glib/glib-Basic-Types.html#gchar"
>gchar</a> *property_name);
<a href="gobject-GParamSpec.html#GParamSpec">GParamSpec</a>** <a href="gobject-The-Base-Object-Type.html#g-object-class-list-properties">g_object_class_list_properties</a> (<a href="gobject-The-Base-Object-Type.html#GObjectClass">GObjectClass</a> *oclass,
<a
href="../glib/glib-Basic-Types.html#guint"
>guint</a> *n_properties);
void <a href="gobject-The-Base-Object-Type.html#g-object-class-override-property">g_object_class_override_property</a>
(<a href="gobject-The-Base-Object-Type.html#GObjectClass">GObjectClass</a> *oclass,
<a
href="../glib/glib-Basic-Types.html#guint"
>guint</a> property_id,
const <a
href="../glib/glib-Basic-Types.html#gchar"
>gchar</a> *name);
void <a href="gobject-The-Base-Object-Type.html#g-object-interface-install-property">g_object_interface_install_property</a>
(<a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> g_iface,
<a href="gobject-GParamSpec.html#GParamSpec">GParamSpec</a> *pspec);
<a href="gobject-GParamSpec.html#GParamSpec">GParamSpec</a>* <a href="gobject-The-Base-Object-Type.html#g-object-interface-find-property">g_object_interface_find_property</a>
(<a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> g_iface,
const <a
href="../glib/glib-Basic-Types.html#gchar"
>gchar</a> *property_name);
<a href="gobject-GParamSpec.html#GParamSpec">GParamSpec</a>** <a href="gobject-The-Base-Object-Type.html#g-object-interface-list-properties">g_object_interface_list_properties</a>
(<a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> g_iface,
<a
href="../glib/glib-Basic-Types.html#guint"
>guint</a> *n_properties_p);
<a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> <a href="gobject-The-Base-Object-Type.html#g-object-new">g_object_new</a> (<a href="gobject-Type-Information.html#GType">GType</a> object_type,
const <a
href="../glib/glib-Basic-Types.html#gchar"
>gchar</a> *first_property_name,
...);
<a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> <a href="gobject-The-Base-Object-Type.html#g-object-newv">g_object_newv</a> (<a href="gobject-Type-Information.html#GType">GType</a> object_type,
<a
href="../glib/glib-Basic-Types.html#guint"
>guint</a> n_parameters,
<a href="gobject-The-Base-Object-Type.html#GParameter">GParameter</a> *parameters);
struct <a href="gobject-The-Base-Object-Type.html#GParameter">GParameter</a>;
<a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> <a href="gobject-The-Base-Object-Type.html#g-object-ref">g_object_ref</a> (<a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> object);
void <a href="gobject-The-Base-Object-Type.html#g-object-unref">g_object_unref</a> (<a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> object);
void (<a href="gobject-The-Base-Object-Type.html#GWeakNotify">*GWeakNotify</a>) (<a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> data,
<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a> *where_the_object_was);
void <a href="gobject-The-Base-Object-Type.html#g-object-weak-ref">g_object_weak_ref</a> (<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a> *object,
<a href="gobject-The-Base-Object-Type.html#GWeakNotify">GWeakNotify</a> notify,
<a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> data);
void <a href="gobject-The-Base-Object-Type.html#g-object-weak-unref">g_object_weak_unref</a> (<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a> *object,
<a href="gobject-The-Base-Object-Type.html#GWeakNotify">GWeakNotify</a> notify,
<a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> data);
void <a href="gobject-The-Base-Object-Type.html#g-object-add-weak-pointer">g_object_add_weak_pointer</a> (<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a> *object,
<a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> *weak_pointer_location);
void <a href="gobject-The-Base-Object-Type.html#g-object-remove-weak-pointer">g_object_remove_weak_pointer</a> (<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a> *object,
<a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> *weak_pointer_location);
<a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> <a href="gobject-The-Base-Object-Type.html#g-object-connect">g_object_connect</a> (<a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> object,
const <a
href="../glib/glib-Basic-Types.html#gchar"
>gchar</a> *signal_spec,
...);
void <a href="gobject-The-Base-Object-Type.html#g-object-disconnect">g_object_disconnect</a> (<a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> object,
const <a
href="../glib/glib-Basic-Types.html#gchar"
>gchar</a> *signal_spec,
...);
void <a href="gobject-The-Base-Object-Type.html#g-object-set">g_object_set</a> (<a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> object,
const <a
href="../glib/glib-Basic-Types.html#gchar"
>gchar</a> *first_property_name,
...);
void <a href="gobject-The-Base-Object-Type.html#g-object-get">g_object_get</a> (<a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> object,
const <a
href="../glib/glib-Basic-Types.html#gchar"
>gchar</a> *first_property_name,
...);
void <a href="gobject-The-Base-Object-Type.html#g-object-notify">g_object_notify</a> (<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a> *object,
const <a
href="../glib/glib-Basic-Types.html#gchar"
>gchar</a> *property_name);
void <a href="gobject-The-Base-Object-Type.html#g-object-freeze-notify">g_object_freeze_notify</a> (<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a> *object);
void <a href="gobject-The-Base-Object-Type.html#g-object-thaw-notify">g_object_thaw_notify</a> (<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a> *object);
<a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> <a href="gobject-The-Base-Object-Type.html#g-object-get-data">g_object_get_data</a> (<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a> *object,
const <a
href="../glib/glib-Basic-Types.html#gchar"
>gchar</a> *key);
void <a href="gobject-The-Base-Object-Type.html#g-object-set-data">g_object_set_data</a> (<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a> *object,
const <a
href="../glib/glib-Basic-Types.html#gchar"
>gchar</a> *key,
<a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> data);
void <a href="gobject-The-Base-Object-Type.html#g-object-set-data-full">g_object_set_data_full</a> (<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a> *object,
const <a
href="../glib/glib-Basic-Types.html#gchar"
>gchar</a> *key,
<a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> data,
<a
href="../glib/glib-Datasets.html#GDestroyNotify"
>GDestroyNotify</a> destroy);
<a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> <a href="gobject-The-Base-Object-Type.html#g-object-steal-data">g_object_steal_data</a> (<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a> *object,
const <a
href="../glib/glib-Basic-Types.html#gchar"
>gchar</a> *key);
<a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> <a href="gobject-The-Base-Object-Type.html#g-object-get-qdata">g_object_get_qdata</a> (<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a> *object,
<a
href="../glib/glib-Quarks.html#GQuark"
>GQuark</a> quark);
void <a href="gobject-The-Base-Object-Type.html#g-object-set-qdata">g_object_set_qdata</a> (<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a> *object,
<a
href="../glib/glib-Quarks.html#GQuark"
>GQuark</a> quark,
<a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> data);
void <a href="gobject-The-Base-Object-Type.html#g-object-set-qdata-full">g_object_set_qdata_full</a> (<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a> *object,
<a
href="../glib/glib-Quarks.html#GQuark"
>GQuark</a> quark,
<a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> data,
<a
href="../glib/glib-Datasets.html#GDestroyNotify"
>GDestroyNotify</a> destroy);
<a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> <a href="gobject-The-Base-Object-Type.html#g-object-steal-qdata">g_object_steal_qdata</a> (<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a> *object,
<a
href="../glib/glib-Quarks.html#GQuark"
>GQuark</a> quark);
void <a href="gobject-The-Base-Object-Type.html#g-object-set-property">g_object_set_property</a> (<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a> *object,
const <a
href="../glib/glib-Basic-Types.html#gchar"
>gchar</a> *property_name,
const <a href="gobject-Generic-values.html#GValue">GValue</a> *value);
void <a href="gobject-The-Base-Object-Type.html#g-object-get-property">g_object_get_property</a> (<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a> *object,
const <a
href="../glib/glib-Basic-Types.html#gchar"
>gchar</a> *property_name,
<a href="gobject-Generic-values.html#GValue">GValue</a> *value);
<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a>* <a href="gobject-The-Base-Object-Type.html#g-object-new-valist">g_object_new_valist</a> (<a href="gobject-Type-Information.html#GType">GType</a> object_type,
const <a
href="../glib/glib-Basic-Types.html#gchar"
>gchar</a> *first_property_name,
va_list var_args);
void <a href="gobject-The-Base-Object-Type.html#g-object-set-valist">g_object_set_valist</a> (<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a> *object,
const <a
href="../glib/glib-Basic-Types.html#gchar"
>gchar</a> *first_property_name,
va_list var_args);
void <a href="gobject-The-Base-Object-Type.html#g-object-get-valist">g_object_get_valist</a> (<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a> *object,
const <a
href="../glib/glib-Basic-Types.html#gchar"
>gchar</a> *first_property_name,
va_list var_args);
void <a href="gobject-The-Base-Object-Type.html#g-object-watch-closure">g_object_watch_closure</a> (<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a> *object,
<a href="gobject-Closures.html#GClosure">GClosure</a> *closure);
void <a href="gobject-The-Base-Object-Type.html#g-object-run-dispose">g_object_run_dispose</a> (<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a> *object);
#define <a href="gobject-The-Base-Object-Type.html#G-OBJECT-WARN-INVALID-PROPERTY-ID-CAPS">G_OBJECT_WARN_INVALID_PROPERTY_ID</a>(object, property_id, pspec)
</pre></div><div class="refsect1" lang="en"><a name="id2786956"></a><h2>Object Hierarchy</h2><pre class="synopsis">
GObject
+----<a href="GTypeModule.html" title="GTypeModule">GTypeModule</a>
</pre></div><div class="refsect1" lang="en"><a name="id2786975"></a><h2>Signal Prototypes</h2><pre class="synopsis">
"<a href="gobject-The-Base-Object-Type.html#GObject-notify">notify</a>" void user_function (<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a> *gobject,
<a href="gobject-GParamSpec.html#GParamSpec">GParamSpec</a> *arg1,
<a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> user_data);
</pre></div><div class="refsect1" lang="en"><a name="id2787026"></a><h2>Description</h2><p>
</p></div><div class="refsect1" lang="en"><a name="id2787036"></a><h2>Details</h2><div class="refsect2" lang="en"><a name="id2787041"></a><h3><a name="GObject-struct"></a>struct GObject</h3><a class="indexterm" name="id2787052"></a><pre class="programlisting">struct GObject;</pre><p>
All the fields in the <span class="structname">GObject</span> structure are private
to the <a href="gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> implementation and should never be accessed directly.
</p></div><hr><div class="refsect2" lang="en"><a name="id2787080"></a><h3><a name="GObjectClass"></a>struct GObjectClass</h3><a class="indexterm" name="id2787091"></a><pre class="programlisting">struct GObjectClass {
GTypeClass g_type_class;
/* overridable methods */
GObject* (*constructor) (GType type,
guint n_construct_properties,
GObjectConstructParam *construct_properties);
void (*set_property) (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
void (*get_property) (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
void (*dispose) (GObject *object);
void (*finalize) (GObject *object);
/* seldomly overidden */
void (*dispatch_properties_changed) (GObject *object,
guint n_pspecs,
GParamSpec **pspecs);
/* signals */
void (*notify) (GObject *object,
GParamSpec *pspec);
};
</pre><p>
The class structure for the <span class="structname">GObject</span> type.
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><a href="gobject-Type-Information.html#GTypeClass">GTypeClass</a> <i class="structfield"><tt>g_type_class</tt></i></span></td><td>the parent class
</td></tr><tr><td><span class="term"><a href="gobject-The-Base-Object-Type.html#GObject">GObject</a>* (*<i class="structfield"><tt>constructor</tt></i>) (GType type,
guint n_construct_properties,
GObjectConstructParam *construct_properties)</span></td><td> the <i class="parameter"><tt>constructor</tt></i> function is called by <a href="gobject-The-Base-Object-Type.html#g-object-new"><tt class="function">g_object_new()</tt></a> to
complete the object initialization after all the construction properties are
set. The first thing a <i class="parameter"><tt>constructor</tt></i> implementation must do is chain up to the
<i class="parameter"><tt>constructor</tt></i> of the parent class. Overriding <i class="parameter"><tt>constructor</tt></i> should be rarely
needed.
</td></tr><tr><td><span class="term">void (*<i class="structfield"><tt>set_property</tt></i>) (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)</span></td><td>the generic setter for all properties of this type. Should be
overridden for every type with properties. Implementations of <i class="parameter"><tt>set_property</tt></i>
don't need to emit property change notification explicitly, this is handled
by the type system.
</td></tr><tr><td><span class="term">void (*<i class="structfield"><tt>get_property</tt></i>) (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)</span></td><td>the generic getter for all properties of this type. Should be
overridden for every type with properties.
</td></tr><tr><td><span class="term">void (*<i class="structfield"><tt>dispose</tt></i>) (GObject *object)</span></td><td>the <i class="parameter"><tt>dispose</tt></i> function is supposed to drop all references to other
objects, but keep the instance otherwise intact, so that client method
invocations still work. It may be run multiple times (due to reference
loops). Before returning, <i class="parameter"><tt>dispose</tt></i> should chain up to the <i class="parameter"><tt>dispose</tt></i> method
of the parent class.
</td></tr><tr><td><span class="term">void (*<i class="structfield"><tt>finalize</tt></i>) (GObject *object)</span></td><td>instance finalization function, should finish the finalization of
the instance begun in <i class="parameter"><tt>dispose</tt></i> and chain up to the <i class="parameter"><tt>finalize</tt></i> method of the
parent class.
</td></tr><tr><td><span class="term">void (*<i class="structfield"><tt>dispatch_properties_changed</tt></i>) (GObject *object,
guint n_pspecs,
GParamSpec **pspecs)</span></td><td>emits property change notification for a bunch
of properties. Overriding <i class="parameter"><tt>dispatch_properties_changed</tt></i> should be rarely
needed.
</td></tr><tr><td><span class="term">void (*<i class="structfield"><tt>notify</tt></i>) (GObject *object,
GParamSpec *pspec)</span></td><td>the class closure for the notify signal
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2787421"></a><h3><a name="GObjectConstructParam"></a>struct GObjectConstructParam</h3><a class="indexterm" name="id2787433"></a><pre class="programlisting">struct GObjectConstructParam {
GParamSpec *pspec;
GValue *value;
};
</pre><p>
The <span class="structname">GObjectConstructParam</span> struct is an auxiliary
structure used to hand <a href="gobject-GParamSpec.html#GParamSpec"><span class="type">GParamSpec</span></a>/<a href="gobject-Generic-values.html#GValue"><span class="type">GValue</span></a> pairs to the <i class="parameter"><tt>constructor</tt></i> of
a <a href="gobject-The-Base-Object-Type.html#GObjectClass"><span class="type">GObjectClass</span></a>.
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><a href="gobject-GParamSpec.html#GParamSpec">GParamSpec</a> *<i class="structfield"><tt>pspec</tt></i></span></td><td>the <a href="gobject-GParamSpec.html#GParamSpec"><span class="type">GParamSpec</span></a> of the construct parameter
</td></tr><tr><td><span class="term"><a href="gobject-Generic-values.html#GValue">GValue</a> *<i class="structfield"><tt>value</tt></i></span></td><td>the value to set the parameter to
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2787534"></a><h3><a name="GObjectGetPropertyFunc"></a>GObjectGetPropertyFunc ()</h3><a class="indexterm" name="id2787546"></a><pre class="programlisting">void (*GObjectGetPropertyFunc) (<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a> *object,
<a
href="../glib/glib-Basic-Types.html#guint"
>guint</a> property_id,
<a href="gobject-Generic-values.html#GValue">GValue</a> *value,
<a href="gobject-GParamSpec.html#GParamSpec">GParamSpec</a> *pspec);</pre><p>
The type of the <i class="parameter"><tt>get_property</tt></i> function of <a href="gobject-The-Base-Object-Type.html#GObjectClass"><span class="type">GObjectClass</span></a>.
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>object</tt></i> :</span></td><td>a <a href="gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a>
</td></tr><tr><td><span class="term"><i class="parameter"><tt>property_id</tt></i> :</span></td><td>the numeric id under which the property was registered with
<a href="gobject-The-Base-Object-Type.html#g-object-class-install-property"><tt class="function">g_object_class_install_property()</tt></a>.
</td></tr><tr><td><span class="term"><i class="parameter"><tt>value</tt></i> :</span></td><td>a <a href="gobject-Generic-values.html#GValue"><span class="type">GValue</span></a> to return the property value in
</td></tr><tr><td><span class="term"><i class="parameter"><tt>pspec</tt></i> :</span></td><td>the <a href="gobject-GParamSpec.html#GParamSpec"><span class="type">GParamSpec</span></a> describing the property
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2787707"></a><h3><a name="GObjectSetPropertyFunc"></a>GObjectSetPropertyFunc ()</h3><a class="indexterm" name="id2787718"></a><pre class="programlisting">void (*GObjectSetPropertyFunc) (<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a> *object,
<a
href="../glib/glib-Basic-Types.html#guint"
>guint</a> property_id,
const <a href="gobject-Generic-values.html#GValue">GValue</a> *value,
<a href="gobject-GParamSpec.html#GParamSpec">GParamSpec</a> *pspec);</pre><p>
The type of the <i class="parameter"><tt>set_property</tt></i> function of <a href="gobject-The-Base-Object-Type.html#GObjectClass"><span class="type">GObjectClass</span></a>.
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>object</tt></i> :</span></td><td>a <a href="gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a>
</td></tr><tr><td><span class="term"><i class="parameter"><tt>property_id</tt></i> :</span></td><td>the numeric id under which the property was registered with
<a href="gobject-The-Base-Object-Type.html#g-object-class-install-property"><tt class="function">g_object_class_install_property()</tt></a>.
</td></tr><tr><td><span class="term"><i class="parameter"><tt>value</tt></i> :</span></td><td>the new value for the property
</td></tr><tr><td><span class="term"><i class="parameter"><tt>pspec</tt></i> :</span></td><td>the <a href="gobject-GParamSpec.html#GParamSpec"><span class="type">GParamSpec</span></a> describing the property
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2787872"></a><h3><a name="GObjectFinalizeFunc"></a>GObjectFinalizeFunc ()</h3><a class="indexterm" name="id2787884"></a><pre class="programlisting">void (*GObjectFinalizeFunc) (<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a> *object);</pre><p>
The type of the <i class="parameter"><tt>finalize</tt></i> function of <a href="gobject-The-Base-Object-Type.html#GObjectClass"><span class="type">GObjectClass</span></a>.
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>object</tt></i> :</span></td><td>the <a href="gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> being finalized
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2787952"></a><h3><a name="G-TYPE-IS-OBJECT-CAPS"></a>G_TYPE_IS_OBJECT()</h3><a class="indexterm" name="id2787964"></a><pre class="programlisting">#define G_TYPE_IS_OBJECT(type) (G_TYPE_FUNDAMENTAL (type) == G_TYPE_OBJECT)
</pre><p>
Returns a boolean value of <tt class="literal">FALSE</tt> or <tt class="literal">TRUE</tt> indicating whether
the passed in type id is a <tt class="literal">G_TYPE_OBJECT</tt> or derived from it.
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>type</tt></i> :</span></td><td>Type id to check for is a <tt class="literal">G_TYPE_OBJECT</tt> relationship.
</td></tr><tr><td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td><td><tt class="literal">FALSE</tt> or <tt class="literal">TRUE</tt>, indicating whether <i class="parameter"><tt>type</tt></i> is a <tt class="literal">G_TYPE_OBJECT</tt>.
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2788057"></a><h3><a name="G-OBJECT-CAPS"></a>G_OBJECT()</h3><a class="indexterm" name="id2788068"></a><pre class="programlisting">#define G_OBJECT(object) (G_TYPE_CHECK_INSTANCE_CAST ((object), G_TYPE_OBJECT, GObject))
</pre><p>
Casts a <a href="gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> or derived pointer into a (GObject*) pointer.
Depending on the current debugging level, this function may invoke
certain runtime checks to identify invalid casts.
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>object</tt></i> :</span></td><td>Object which is subject to casting.
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2788114"></a><h3><a name="G-IS-OBJECT-CAPS"></a>G_IS_OBJECT()</h3><a class="indexterm" name="id2788125"></a><pre class="programlisting">#define G_IS_OBJECT(object) (G_TYPE_CHECK_INSTANCE_TYPE ((object), G_TYPE_OBJECT))
</pre><p>
Checks whether a valid <a href="gobject-Type-Information.html#GTypeInstance"><span class="type">GTypeInstance</span></a> pointer is of type <tt class="literal">G_TYPE_OBJECT</tt>.
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>object</tt></i> :</span></td><td>Instance to check for being a <tt class="literal">G_TYPE_OBJECT</tt>.
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2788181"></a><h3><a name="G-OBJECT-CLASS-CAPS"></a>G_OBJECT_CLASS()</h3><a class="indexterm" name="id2788191"></a><pre class="programlisting">#define G_OBJECT_CLASS(class) (G_TYPE_CHECK_CLASS_CAST ((class), G_TYPE_OBJECT, GObjectClass))
</pre><p>
Casts a derived <a href="gobject-The-Base-Object-Type.html#GObjectClass"><span class="type">GObjectClass</span></a> structure into a <a href="gobject-The-Base-Object-Type.html#GObjectClass"><span class="type">GObjectClass</span></a> structure.
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>class</tt></i> :</span></td><td>a valid <a href="gobject-The-Base-Object-Type.html#GObjectClass"><span class="type">GObjectClass</span></a>
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2788251"></a><h3><a name="G-IS-OBJECT-CLASS-CAPS"></a>G_IS_OBJECT_CLASS()</h3><a class="indexterm" name="id2788263"></a><pre class="programlisting">#define G_IS_OBJECT_CLASS(class) (G_TYPE_CHECK_CLASS_TYPE ((class), G_TYPE_OBJECT))
</pre><p>
Checks whether <i class="parameter"><tt>class</tt></i> "is a" valid <a href="gobject-The-Base-Object-Type.html#GObjectClass"><span class="type">GObjectClass</span></a> structure of type
<tt class="literal">G_TYPE_OBJECT</tt> or derived.
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>class</tt></i> :</span></td><td>a <a href="gobject-The-Base-Object-Type.html#GObjectClass"><span class="type">GObjectClass</span></a>
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2788327"></a><h3><a name="G-OBJECT-GET-CLASS-CAPS"></a>G_OBJECT_GET_CLASS()</h3><a class="indexterm" name="id2788338"></a><pre class="programlisting">#define G_OBJECT_GET_CLASS(object) (G_TYPE_INSTANCE_GET_CLASS ((object), G_TYPE_OBJECT, GObjectClass))
</pre><p>
Returns the class structure associated to a <a href="gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> instance.
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>object</tt></i> :</span></td><td>a <a href="gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> instance.
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2788389"></a><h3><a name="G-OBJECT-TYPE-CAPS"></a>G_OBJECT_TYPE()</h3><a class="indexterm" name="id2788400"></a><pre class="programlisting">#define G_OBJECT_TYPE(object) (G_TYPE_FROM_INSTANCE (object))
</pre><p>
Return the type id of an object.
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>object</tt></i> :</span></td><td>Object to return the type id for.
</td></tr><tr><td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td><td>Type id of <i class="parameter"><tt>object</tt></i>.
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2788451"></a><h3><a name="G-OBJECT-TYPE-NAME-CAPS"></a>G_OBJECT_TYPE_NAME()</h3><a class="indexterm" name="id2788463"></a><pre class="programlisting">#define G_OBJECT_TYPE_NAME(object) (g_type_name (G_OBJECT_TYPE (object)))
</pre><p>
Returns the name of an object's type.
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>object</tt></i> :</span></td><td>Object to return the type name for.
</td></tr><tr><td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td><td>Type name of <i class="parameter"><tt>object</tt></i>. The string is owned by the type system and
should not be freed.
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2788516"></a><h3><a name="G-OBJECT-CLASS-TYPE-CAPS"></a>G_OBJECT_CLASS_TYPE()</h3><a class="indexterm" name="id2788527"></a><pre class="programlisting">#define G_OBJECT_CLASS_TYPE(class) (G_TYPE_FROM_CLASS (class))
</pre><p>
Return the type id of a class structure.
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>class</tt></i> :</span></td><td>a valid <a href="gobject-The-Base-Object-Type.html#GObjectClass"><span class="type">GObjectClass</span></a>
</td></tr><tr><td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td><td>Type id of <i class="parameter"><tt>class</tt></i>.
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2788586"></a><h3><a name="G-OBJECT-CLASS-NAME-CAPS"></a>G_OBJECT_CLASS_NAME()</h3><a class="indexterm" name="id2788598"></a><pre class="programlisting">#define G_OBJECT_CLASS_NAME(class) (g_type_name (G_OBJECT_CLASS_TYPE (class)))
</pre><p>
Return the name of a class structure's type.
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>class</tt></i> :</span></td><td>a valid <a href="gobject-The-Base-Object-Type.html#GObjectClass"><span class="type">GObjectClass</span></a>
</td></tr><tr><td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td><td>Type name of <i class="parameter"><tt>class</tt></i>. The string is owned by the type system and
should not be freed.
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2788658"></a><h3><a name="g-object-class-install-property"></a>g_object_class_install_property ()</h3><a class="indexterm" name="id2788670"></a><pre class="programlisting">void g_object_class_install_property (<a href="gobject-The-Base-Object-Type.html#GObjectClass">GObjectClass</a> *oclass,
<a
href="../glib/glib-Basic-Types.html#guint"
>guint</a> property_id,
<a href="gobject-GParamSpec.html#GParamSpec">GParamSpec</a> *pspec);</pre><p>
Installs a new property. This is usually done in the class initializer.
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>oclass</tt></i> :</span></td><td>a <a href="gobject-The-Base-Object-Type.html#GObjectClass"><span class="type">GObjectClass</span></a>
</td></tr><tr><td><span class="term"><i class="parameter"><tt>property_id</tt></i> :</span></td><td>the id for the new property
</td></tr><tr><td><span class="term"><i class="parameter"><tt>pspec</tt></i> :</span></td><td>the <a href="gobject-GParamSpec.html#GParamSpec"><span class="type">GParamSpec</span></a> for the new property
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2788778"></a><h3><a name="g-object-class-find-property"></a>g_object_class_find_property ()</h3><a class="indexterm" name="id2788790"></a><pre class="programlisting"><a href="gobject-GParamSpec.html#GParamSpec">GParamSpec</a>* g_object_class_find_property (<a href="gobject-The-Base-Object-Type.html#GObjectClass">GObjectClass</a> *oclass,
const <a
href="../glib/glib-Basic-Types.html#gchar"
>gchar</a> *property_name);</pre><p>
Looks up the <a href="gobject-GParamSpec.html#GParamSpec"><span class="type">GParamSpec</span></a> for a property of a class.
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>oclass</tt></i> :</span></td><td>a <a href="gobject-The-Base-Object-Type.html#GObjectClass"><span class="type">GObjectClass</span></a>
</td></tr><tr><td><span class="term"><i class="parameter"><tt>property_name</tt></i> :</span></td><td>the name of the property to look up
</td></tr><tr><td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td><td>the <a href="gobject-GParamSpec.html#GParamSpec"><span class="type">GParamSpec</span></a> for the property, or <tt class="literal">NULL</tt> if the class doesn't have
a property of that name
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2788900"></a><h3><a name="g-object-class-list-properties"></a>g_object_class_list_properties ()</h3><a class="indexterm" name="id2788912"></a><pre class="programlisting"><a href="gobject-GParamSpec.html#GParamSpec">GParamSpec</a>** g_object_class_list_properties (<a href="gobject-The-Base-Object-Type.html#GObjectClass">GObjectClass</a> *oclass,
<a
href="../glib/glib-Basic-Types.html#guint"
>guint</a> *n_properties);</pre><p>
Returns an array of <a href="gobject-GParamSpec.html#GParamSpec"><span class="type">GParamSpec</span></a>* for all properties of a class.
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>oclass</tt></i> :</span></td><td>a <a href="gobject-The-Base-Object-Type.html#GObjectClass"><span class="type">GObjectClass</span></a>
</td></tr><tr><td><span class="term"><i class="parameter"><tt>n_properties</tt></i> :</span></td><td>return location for the length of the returned array
</td></tr><tr><td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td><td>an array of <a href="gobject-GParamSpec.html#GParamSpec"><span class="type">GParamSpec</span></a>* which should be freed after use
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2789017"></a><h3><a name="g-object-class-override-property"></a>g_object_class_override_property ()</h3><a class="indexterm" name="id2789028"></a><pre class="programlisting">void g_object_class_override_property
(<a href="gobject-The-Base-Object-Type.html#GObjectClass">GObjectClass</a> *oclass,
<a
href="../glib/glib-Basic-Types.html#guint"
>guint</a> property_id,
const <a
href="../glib/glib-Basic-Types.html#gchar"
>gchar</a> *name);</pre><p>
Registers <i class="parameter"><tt>property_id</tt></i> as referring to a property with the
name <i class="parameter"><tt>name</tt></i> in a parent class or in an interface implemented
by <i class="parameter"><tt>oclass</tt></i>. This allows this class to <i class="firstterm">override</i>
a property implementation in a parent class or to provide
the implementation of a property from an interface.
</p><div class="note" style="margin-left: 0.5in; margin-right: 0.5in;"><h3 class="title">Note</h3><p>
Internally, overriding is implemented by creating a property of type
<a href="gobject-Standard-Parameter-and-Value-Types.html#GParamSpecOverride"><span class="type">GParamSpecOverride</span></a>; generally operations that query the properties of
the object class, such as <a href="gobject-The-Base-Object-Type.html#g-object-class-find-property"><tt class="function">g_object_class_find_property()</tt></a> or
<a href="gobject-The-Base-Object-Type.html#g-object-class-list-properties"><tt class="function">g_object_class_list_properties()</tt></a> will return the overridden
property. However, in one case, the <i class="parameter"><tt>construct_properties</tt></i> argument of
the <i class="parameter"><tt>constructor</tt></i> virtual function, the <a href="gobject-Standard-Parameter-and-Value-Types.html#GParamSpecOverride"><span class="type">GParamSpecOverride</span></a> is passed
instead, so that the <i class="parameter"><tt>param_id</tt></i> field of the <a href="gobject-GParamSpec.html#GParamSpec"><span class="type">GParamSpec</span></a> will be
correct. For virtually all uses, this makes no difference. If you
need to get the overridden property, you can call
<a href="gobject-GParamSpec.html#g-param-spec-get-redirect-target"><tt class="function">g_param_spec_get_redirect_target()</tt></a>.
</p></div><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>oclass</tt></i> :</span></td><td>a <a href="gobject-The-Base-Object-Type.html#GObjectClass"><span class="type">GObjectClass</span></a>
</td></tr><tr><td><span class="term"><i class="parameter"><tt>property_id</tt></i> :</span></td><td>the new property ID
</td></tr><tr><td><span class="term"><i class="parameter"><tt>name</tt></i> :</span></td><td>the name of a property registered in a parent class or
in an interface of this class.
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2789247"></a><h3><a name="g-object-interface-install-property"></a>g_object_interface_install_property ()</h3><a class="indexterm" name="id2789260"></a><pre class="programlisting">void g_object_interface_install_property
(<a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> g_iface,
<a href="gobject-GParamSpec.html#GParamSpec">GParamSpec</a> *pspec);</pre><p>
Add a property to an interface; this is only useful for interfaces
that are added to GObject-derived types. Adding a property to an
interface forces all objects classes with that interface to have a
compatible property. The compatible property could be a newly
created <a href="gobject-GParamSpec.html#GParamSpec"><span class="type">GParamSpec</span></a>, but normally
<a href="gobject-The-Base-Object-Type.html#g-object-class-override-property"><tt class="function">g_object_class_override_property()</tt></a> will be used so that the object
class only needs to provide an implementation and inherits the
property description, default value, bounds, and so forth from the
interface property.
</p><p>
This function is meant to be called from the interface's default
vtable initialization function (the <i class="parameter"><tt>class_init</tt></i> member of
<a href="gobject-Type-Information.html#GTypeInfo"><span class="type">GTypeInfo</span></a>.) It must not be called after after <i class="parameter"><tt>class_init</tt></i> has
been called for any object types implementing this interface.
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>g_iface</tt></i> :</span></td><td>any interface vtable for the interface, or the default
vtable for the interface.
</td></tr><tr><td><span class="term"><i class="parameter"><tt>pspec</tt></i> :</span></td><td>the <a href="gobject-GParamSpec.html#GParamSpec"><span class="type">GParamSpec</span></a> for the new property
</td></tr></tbody></table></div><p>Since 2.4
</p></div><hr><div class="refsect2" lang="en"><a name="id2789396"></a><h3><a name="g-object-interface-find-property"></a>g_object_interface_find_property ()</h3><a class="indexterm" name="id2789408"></a><pre class="programlisting"><a href="gobject-GParamSpec.html#GParamSpec">GParamSpec</a>* g_object_interface_find_property
(<a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> g_iface,
const <a
href="../glib/glib-Basic-Types.html#gchar"
>gchar</a> *property_name);</pre><p>
Find the <a href="gobject-GParamSpec.html#GParamSpec"><span class="type">GParamSpec</span></a> with the given name for an
interface. Generally, the interface vtable passed in as <i class="parameter"><tt>g_iface</tt></i>
will be the default vtable from <a href="gobject-Type-Information.html#g-type-default-interface-ref"><tt class="function">g_type_default_interface_ref()</tt></a>, or,
if you know the interface has already been loaded,
<a href="gobject-Type-Information.html#g-type-default-interface-peek"><tt class="function">g_type_default_interface_peek()</tt></a>.
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>g_iface</tt></i> :</span></td><td>any interface vtable for the interface, or the default
vtable for the interface
</td></tr><tr><td><span class="term"><i class="parameter"><tt>property_name</tt></i> :</span></td><td>name of a property to lookup.
</td></tr><tr><td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td><td>the <a href="gobject-GParamSpec.html#GParamSpec"><span class="type">GParamSpec</span></a> for the property of the
interface with the name <i class="parameter"><tt>property_name</tt></i>, or <tt class="literal">NULL</tt>
if no such property exists.
</td></tr></tbody></table></div><p>Since 2.4
</p></div><hr><div class="refsect2" lang="en"><a name="id2789554"></a><h3><a name="g-object-interface-list-properties"></a>g_object_interface_list_properties ()</h3><a class="indexterm" name="id2789566"></a><pre class="programlisting"><a href="gobject-GParamSpec.html#GParamSpec">GParamSpec</a>** g_object_interface_list_properties
(<a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> g_iface,
<a
href="../glib/glib-Basic-Types.html#guint"
>guint</a> *n_properties_p);</pre><p>
Lists the properties of an interface.Generally, the interface
vtable passed in as <i class="parameter"><tt>g_iface</tt></i> will be the default vtable from
<a href="gobject-Type-Information.html#g-type-default-interface-ref"><tt class="function">g_type_default_interface_ref()</tt></a>, or, if you know the interface has
already been loaded, <a href="gobject-Type-Information.html#g-type-default-interface-peek"><tt class="function">g_type_default_interface_peek()</tt></a>.
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>g_iface</tt></i> :</span></td><td>any interface vtable for the interface, or the default
vtable for the interface
</td></tr><tr><td><span class="term"><i class="parameter"><tt>n_properties_p</tt></i> :</span></td><td>location to store number of properties returned.
</td></tr><tr><td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td><td>a pointer to an array of pointers to <a href="gobject-GParamSpec.html#GParamSpec"><span class="type">GParamSpec</span></a> structures.
The paramspecs are owned by GLib, but the array should
be freed with <a
href="../glib/glib-Memory-Allocation.html#g-free"
><tt class="function">g_free()</tt></a> when you are done with it.
</td></tr></tbody></table></div><p>Since 2.4
</p></div><hr><div class="refsect2" lang="en"><a name="id2789703"></a><h3><a name="g-object-new"></a>g_object_new ()</h3><a class="indexterm" name="id2789714"></a><pre class="programlisting"><a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> g_object_new (<a href="gobject-Type-Information.html#GType">GType</a> object_type,
const <a
href="../glib/glib-Basic-Types.html#gchar"
>gchar</a> *first_property_name,
...);</pre><p>
Creates a new instance of a <a href="gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> subtype and sets its properties.
</p><p>
Construction parameters (see <span class="type">G_PARAM_CONSTRUCT</span>, <span class="type">G_PARAM_CONSTRUCT_ONLY</span>)
which are not explicitly specified are set to their default values.
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>object_type</tt></i> :</span></td><td>the type id of the <a href="gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> subtype to instantiate
</td></tr><tr><td><span class="term"><i class="parameter"><tt>first_property_name</tt></i> :</span></td><td>the name of the first property
</td></tr><tr><td><span class="term"><i class="parameter"><tt>...</tt></i> :</span></td><td>the value of the first property, followed optionally by more
name/value pairs, followed by <tt class="literal">NULL</tt>
</td></tr><tr><td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td><td>a new instance of <i class="parameter"><tt>object_type</tt></i>
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2789863"></a><h3><a name="g-object-newv"></a>g_object_newv ()</h3><a class="indexterm" name="id2789874"></a><pre class="programlisting"><a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> g_object_newv (<a href="gobject-Type-Information.html#GType">GType</a> object_type,
<a
href="../glib/glib-Basic-Types.html#guint"
>guint</a> n_parameters,
<a href="gobject-The-Base-Object-Type.html#GParameter">GParameter</a> *parameters);</pre><p>
Creates a new instance of a <a href="gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> subtype and sets its properties.
</p><p>
Construction parameters (see <span class="type">G_PARAM_CONSTRUCT</span>, <span class="type">G_PARAM_CONSTRUCT_ONLY</span>)
which are not explicitly specified are set to their default values.
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>object_type</tt></i> :</span></td><td>the type id of the <a href="gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> subtype to instantiate
</td></tr><tr><td><span class="term"><i class="parameter"><tt>n_parameters</tt></i> :</span></td><td>the length of the <i class="parameter"><tt>parameters</tt></i> array
</td></tr><tr><td><span class="term"><i class="parameter"><tt>parameters</tt></i> :</span></td><td>an array of <a href="gobject-The-Base-Object-Type.html#GParameter"><span class="type">GParameter</span></a>
</td></tr><tr><td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td><td>a new instance of <i class="parameter"><tt>object_type</tt></i>
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2790033"></a><h3><a name="GParameter"></a>struct GParameter</h3><a class="indexterm" name="id2790044"></a><pre class="programlisting">struct GParameter {
const gchar *name;
GValue value;
};
</pre><p>
The <span class="structname">GParameter</span> struct is an auxiliary structure used
to hand parameter name/value pairs to <a href="gobject-The-Base-Object-Type.html#g-object-newv"><tt class="function">g_object_newv()</tt></a>.
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term">const <a
href="../glib/glib-Basic-Types.html#gchar"
>gchar</a> *<i class="structfield"><tt>name</tt></i></span></td><td>the parameter name
</td></tr><tr><td><span class="term"><a href="gobject-Generic-values.html#GValue">GValue</a> <i class="structfield"><tt>value</tt></i></span></td><td>the parameter value
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2790119"></a><h3><a name="g-object-ref"></a>g_object_ref ()</h3><a class="indexterm" name="id2790130"></a><pre class="programlisting"><a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> g_object_ref (<a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> object);</pre><p>
Increases the reference count of <i class="parameter"><tt>object</tt></i>.
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>object</tt></i> :</span></td><td>a <a href="gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a>
</td></tr><tr><td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td><td><i class="parameter"><tt>object</tt></i>
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2790205"></a><h3><a name="g-object-unref"></a>g_object_unref ()</h3><a class="indexterm" name="id2790216"></a><pre class="programlisting">void g_object_unref (<a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> object);</pre><p>
Decreases the reference count if <i class="parameter"><tt>object</tt></i>.
When its reference count drops to 0, the object is finalized (i.e. its memory is freed).
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>object</tt></i> :</span></td><td>a <a href="gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a>
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2790277"></a><h3><a name="GWeakNotify"></a>GWeakNotify ()</h3><a class="indexterm" name="id2790288"></a><pre class="programlisting">void (*GWeakNotify) (<a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> data,
<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a> *where_the_object_was);</pre><p>
A <a href="gobject-The-Base-Object-Type.html#GWeakNotify"><span class="type">GWeakNotify</span></a> function can be added to an object as a callback that gets
triggered when the object is finalized. Since the object is already being
finalized when the <a href="gobject-The-Base-Object-Type.html#GWeakNotify"><span class="type">GWeakNotify</span></a> is called, there's not much you could do
with the object, apart from e.g. using its adress as hash-index or the like.
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>data</tt></i> :</span></td><td>data that was provided when the weak reference was established
</td></tr><tr><td><span class="term"><i class="parameter"><tt>where_the_object_was</tt></i> :</span></td><td>the object being finalized
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2790378"></a><h3><a name="g-object-weak-ref"></a>g_object_weak_ref ()</h3><a class="indexterm" name="id2790389"></a><pre class="programlisting">void g_object_weak_ref (<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a> *object,
<a href="gobject-The-Base-Object-Type.html#GWeakNotify">GWeakNotify</a> notify,
<a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> data);</pre><p>
Adds a weak reference callback to an object. Weak references are used for
notification when an object is finalized. They are called "weak references"
because they allow you to safely hold a pointer to an object without calling
<a href="gobject-The-Base-Object-Type.html#g-object-ref"><tt class="function">g_object_ref()</tt></a> (<a href="gobject-The-Base-Object-Type.html#g-object-ref"><tt class="function">g_object_ref()</tt></a> adds a strong reference, that is, forces the
object to stay alive).
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>object</tt></i> :</span></td><td><a href="gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> to reference weakly
</td></tr><tr><td><span class="term"><i class="parameter"><tt>notify</tt></i> :</span></td><td>callback to invoke before the object is freed
</td></tr><tr><td><span class="term"><i class="parameter"><tt>data</tt></i> :</span></td><td>extra data to pass to notify
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2790512"></a><h3><a name="g-object-weak-unref"></a>g_object_weak_unref ()</h3><a class="indexterm" name="id2790523"></a><pre class="programlisting">void g_object_weak_unref (<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a> *object,
<a href="gobject-The-Base-Object-Type.html#GWeakNotify">GWeakNotify</a> notify,
<a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> data);</pre><p>
Removes a weak reference callback to an object.
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>object</tt></i> :</span></td><td><a href="gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> to remove a weak reference from
</td></tr><tr><td><span class="term"><i class="parameter"><tt>notify</tt></i> :</span></td><td>callback to search for
</td></tr><tr><td><span class="term"><i class="parameter"><tt>data</tt></i> :</span></td><td>data to search for
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2790620"></a><h3><a name="g-object-add-weak-pointer"></a>g_object_add_weak_pointer ()</h3><a class="indexterm" name="id2790632"></a><pre class="programlisting">void g_object_add_weak_pointer (<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a> *object,
<a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> *weak_pointer_location);</pre><p>
Adds a weak reference from weak_pointer to <i class="parameter"><tt>object</tt></i> to indicate that
the pointer located at <i class="parameter"><tt>weak_pointer_location</tt></i> is only valid during the
lifetime of <i class="parameter"><tt>object</tt></i>. When the <i class="parameter"><tt>object</tt></i> is finalized, <i class="parameter"><tt>weak_pointer</tt></i> will
be set to <tt class="literal">NULL</tt>.
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>object</tt></i> :</span></td><td>The object that should be weak referenced.
</td></tr><tr><td><span class="term"><i class="parameter"><tt>weak_pointer_location</tt></i> :</span></td><td>The memory address of a pointer.
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2790739"></a><h3><a name="g-object-remove-weak-pointer"></a>g_object_remove_weak_pointer ()</h3><a class="indexterm" name="id2790751"></a><pre class="programlisting">void g_object_remove_weak_pointer (<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a> *object,
<a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> *weak_pointer_location);</pre><p>
Removes a weak reference from <i class="parameter"><tt>object</tt></i> that was previously added
using <a href="gobject-The-Base-Object-Type.html#g-object-add-weak-pointer"><tt class="function">g_object_add_weak_pointer()</tt></a>. The <i class="parameter"><tt>weak_pointer_location</tt></i> has
to match the one used with <a href="gobject-The-Base-Object-Type.html#g-object-add-weak-pointer"><tt class="function">g_object_add_weak_pointer()</tt></a>.
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>object</tt></i> :</span></td><td>The object that is weak referenced.
</td></tr><tr><td><span class="term"><i class="parameter"><tt>weak_pointer_location</tt></i> :</span></td><td>The memory address of a pointer.
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2790856"></a><h3><a name="g-object-connect"></a>g_object_connect ()</h3><a class="indexterm" name="id2790867"></a><pre class="programlisting"><a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> g_object_connect (<a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> object,
const <a
href="../glib/glib-Basic-Types.html#gchar"
>gchar</a> *signal_spec,
...);</pre><p>
A convenience function to connect multiple signals at once.
</p><p>
The signal specs expected by this function have the form
"modifier::signal_name", where modifier can be one of the following:
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term">signal</span></td><td><p>
equivalent to <tt class="literal">g_signal_connect_data (...)</tt>
</p></td></tr><tr><td><span class="term">object_signal, </span><span class="term">object-signal</span></td><td><p>
equivalent to <tt class="literal">g_signal_connect_object (...)</tt>
</p></td></tr><tr><td><span class="term">swapped_signal, </span><span class="term">swapped-signal</span></td><td><p>
equivalent to <tt class="literal">g_signal_connect_data (..., G_CONNECT_SWAPPED)</tt>
</p></td></tr><tr><td><span class="term">swapped_object_signal, </span><span class="term">swapped-object-signal</span></td><td><p>
equivalent to <tt class="literal">g_signal_connect_object (..., G_CONNECT_SWAPPED)</tt>
</p></td></tr><tr><td><span class="term">signal_after, </span><span class="term">signal-after</span></td><td><p>
equivalent to <tt class="literal">g_signal_connect_data (..., G_CONNECT_AFTER)</tt>
</p></td></tr><tr><td><span class="term">object_signal_after, </span><span class="term">object-signal-after</span></td><td><p>
equivalent to <tt class="literal">g_signal_connect_object (..., G_CONNECT_AFTER)</tt>
</p></td></tr><tr><td><span class="term">swapped_signal_after, </span><span class="term">swapped-signal-after</span></td><td><p>
equivalent to <tt class="literal">g_signal_connect_data (..., G_CONNECT_SWAPPED | G_CONNECT_AFTER)</tt>
</p></td></tr><tr><td><span class="term">swapped_object_signal_after, </span><span class="term">swapped-object-signal-after</span></td><td><p>
equivalent to <tt class="literal">g_signal_connect_object (..., G_CONNECT_SWAPPED | G_CONNECT_AFTER)</tt>
</p></td></tr></tbody></table></div><p>
</p><div class="informalexample"><pre class="programlisting">
menu->toplevel = g_object_connect (g_object_new (GTK_TYPE_WINDOW,
"type", GTK_WINDOW_POPUP,
"child", menu,
NULL),
"signal::event", gtk_menu_window_event, menu,
"signal::size_request", gtk_menu_window_size_request, menu,
"signal::destroy", gtk_widget_destroyed, &menu->toplevel,
NULL);
</pre></div><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>object</tt></i> :</span></td><td>a <a href="gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a>
</td></tr><tr><td><span class="term"><i class="parameter"><tt>signal_spec</tt></i> :</span></td><td>the spec for the first signal
</td></tr><tr><td><span class="term"><i class="parameter"><tt>...</tt></i> :</span></td><td><a href="gobject-Closures.html#GCallback"><span class="type">GCallback</span></a> for the first signal, followed by data for the first signal,
followed optionally by more signal spec/callback/data triples,
followed by <tt class="literal">NULL</tt>
</td></tr><tr><td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td><td><i class="parameter"><tt>object</tt></i>
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2791186"></a><h3><a name="g-object-disconnect"></a>g_object_disconnect ()</h3><a class="indexterm" name="id2791197"></a><pre class="programlisting">void g_object_disconnect (<a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> object,
const <a
href="../glib/glib-Basic-Types.html#gchar"
>gchar</a> *signal_spec,
...);</pre><p>
A convenience function to disconnect multiple signals at once.
</p><p>
The signal specs expected by this function have the form "any_signal", which
means to disconnect any signal with matching callback and data, or
"any_signal::signal_name", which only disconnects the signal named "signal_name".
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>object</tt></i> :</span></td><td>a <a href="gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a>
</td></tr><tr><td><span class="term"><i class="parameter"><tt>signal_spec</tt></i> :</span></td><td>the spec for the first signal
</td></tr><tr><td><span class="term"><i class="parameter"><tt>...</tt></i> :</span></td><td><a href="gobject-Closures.html#GCallback"><span class="type">GCallback</span></a> for the first signal, followed by data for the first signal,
followed optionally by more signal spec/callback/data triples,
followed by <tt class="literal">NULL</tt>
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2791310"></a><h3><a name="g-object-set"></a>g_object_set ()</h3><a class="indexterm" name="id2791321"></a><pre class="programlisting">void g_object_set (<a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> object,
const <a
href="../glib/glib-Basic-Types.html#gchar"
>gchar</a> *first_property_name,
...);</pre><p>
Sets properties on an object.
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>object</tt></i> :</span></td><td>a <a href="gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a>
</td></tr><tr><td><span class="term"><i class="parameter"><tt>first_property_name</tt></i> :</span></td><td>name of the first property to set
</td></tr><tr><td><span class="term"><i class="parameter"><tt>...</tt></i> :</span></td><td>value for the first property, followed optionally by more
name/value pairs, followed by <tt class="literal">NULL</tt>
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2791419"></a><h3><a name="g-object-get"></a>g_object_get ()</h3><a class="indexterm" name="id2791429"></a><pre class="programlisting">void g_object_get (<a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> object,
const <a
href="../glib/glib-Basic-Types.html#gchar"
>gchar</a> *first_property_name,
...);</pre><p>
Gets properties of an object.
</p><p>
In general, a copy is made of the property contents and the caller is
responsible for freeing the memory in the appropriate manner for the type,
for instance by calling <a
href="../glib/glib-Memory-Allocation.html#g-free"
><tt class="function">g_free()</tt></a> or <a href="gobject-The-Base-Object-Type.html#g-object-unref"><tt class="function">g_object_unref()</tt></a>.
</p><div class="example"><a name="id2791494"></a><p class="title"><b>Example 1. Using g_object_get()</b></p><p>
An example of using <a href="gobject-The-Base-Object-Type.html#g-object-get"><tt class="function">g_object_get()</tt></a> to get the contents
of three properties - one of type <a href="gobject-Type-Information.html#G-TYPE-INT-CAPS"><span class="type">G_TYPE_INT</span></a>,
one of type <a href="gobject-Type-Information.html#G-TYPE-STRING-CAPS"><span class="type">G_TYPE_STRING</span></a>, and one of type <a href="gobject-Type-Information.html#G-TYPE-OBJECT-CAPS"><span class="type">G_TYPE_OBJECT</span></a>:
</p><pre class="programlisting">
gint intval;
gchar *strval;
GObject *objval;
g_object_get (my_object,
"intproperty", &intval,
"strproperty", &strval,
"objproperty", &objval,
NULL);
/* Do something with intval, strval, objval */
g_free (strval);
g_object_unref (objval);
</pre></div><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>object</tt></i> :</span></td><td>a <a href="gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a>
</td></tr><tr><td><span class="term"><i class="parameter"><tt>first_property_name</tt></i> :</span></td><td>name of the first property to get
</td></tr><tr><td><span class="term"><i class="parameter"><tt>...</tt></i> :</span></td><td>return location for the first property, followed optionally by more
name/return location pairs, followed by <tt class="literal">NULL</tt>
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2791621"></a><h3><a name="g-object-notify"></a>g_object_notify ()</h3><a class="indexterm" name="id2791632"></a><pre class="programlisting">void g_object_notify (<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a> *object,
const <a
href="../glib/glib-Basic-Types.html#gchar"
>gchar</a> *property_name);</pre><p>
Emits a "notify" signal for the property <i class="parameter"><tt>property_name</tt></i> on <i class="parameter"><tt>object</tt></i>.
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>object</tt></i> :</span></td><td>a <a href="gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a>
</td></tr><tr><td><span class="term"><i class="parameter"><tt>property_name</tt></i> :</span></td><td>the name of a property installed on the class of <i class="parameter"><tt>object</tt></i>.
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2791727"></a><h3><a name="g-object-freeze-notify"></a>g_object_freeze_notify ()</h3><a class="indexterm" name="id2791739"></a><pre class="programlisting">void g_object_freeze_notify (<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a> *object);</pre><p>
Stops emission of "notify" signals on <i class="parameter"><tt>object</tt></i>. The signals are
queued until <a href="gobject-The-Base-Object-Type.html#g-object-thaw-notify"><tt class="function">g_object_thaw_notify()</tt></a> is called on <i class="parameter"><tt>object</tt></i>.
</p><p>
This is necessary for accessors that modify multiple properties to prevent
premature notification while the object is still being modified.
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>object</tt></i> :</span></td><td>a <a href="gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a>
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2791822"></a><h3><a name="g-object-thaw-notify"></a>g_object_thaw_notify ()</h3><a class="indexterm" name="id2791834"></a><pre class="programlisting">void g_object_thaw_notify (<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a> *object);</pre><p>
Reverts the effect of a previous call to <a href="gobject-The-Base-Object-Type.html#g-object-freeze-notify"><tt class="function">g_object_freeze_notify()</tt></a>.
This causes all queued "notify" signals on <i class="parameter"><tt>object</tt></i> to be emitted.
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>object</tt></i> :</span></td><td>a <a href="gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a>
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2791906"></a><h3><a name="g-object-get-data"></a>g_object_get_data ()</h3><a class="indexterm" name="id2791917"></a><pre class="programlisting"><a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> g_object_get_data (<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a> *object,
const <a
href="../glib/glib-Basic-Types.html#gchar"
>gchar</a> *key);</pre><p>
Gets a named field from the objects table of associations (see <a href="gobject-The-Base-Object-Type.html#g-object-set-data"><tt class="function">g_object_set_data()</tt></a>).
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>object</tt></i> :</span></td><td><a href="gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> containing the associations
</td></tr><tr><td><span class="term"><i class="parameter"><tt>key</tt></i> :</span></td><td>name of the key for that association
</td></tr><tr><td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td><td>the data if found, or <tt class="literal">NULL</tt> if no such data exists.
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2792020"></a><h3><a name="g-object-set-data"></a>g_object_set_data ()</h3><a class="indexterm" name="id2792032"></a><pre class="programlisting">void g_object_set_data (<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a> *object,
const <a
href="../glib/glib-Basic-Types.html#gchar"
>gchar</a> *key,
<a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> data);</pre><p>
Each object carries around a table of associations from
strings to pointers. This function lets you set an association.
</p><p>
If the object already had an association with that name,
the old association will be destroyed.
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>object</tt></i> :</span></td><td><a href="gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> containing the associations.
</td></tr><tr><td><span class="term"><i class="parameter"><tt>key</tt></i> :</span></td><td>name of the key
</td></tr><tr><td><span class="term"><i class="parameter"><tt>data</tt></i> :</span></td><td>data to associate with that key
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2792135"></a><h3><a name="g-object-set-data-full"></a>g_object_set_data_full ()</h3><a class="indexterm" name="id2792146"></a><pre class="programlisting">void g_object_set_data_full (<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a> *object,
const <a
href="../glib/glib-Basic-Types.html#gchar"
>gchar</a> *key,
<a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> data,
<a
href="../glib/glib-Datasets.html#GDestroyNotify"
>GDestroyNotify</a> destroy);</pre><p>
Like <a href="gobject-The-Base-Object-Type.html#g-object-set-data"><tt class="function">g_object_set_data()</tt></a> except it adds notification
for when the association is destroyed, either by setting it
to a different value or when the object is destroyed.
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>object</tt></i> :</span></td><td><a href="gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> containing the associations
</td></tr><tr><td><span class="term"><i class="parameter"><tt>key</tt></i> :</span></td><td>name of the key
</td></tr><tr><td><span class="term"><i class="parameter"><tt>data</tt></i> :</span></td><td>data to associate with that key
</td></tr><tr><td><span class="term"><i class="parameter"><tt>destroy</tt></i> :</span></td><td>function to call when the association is destroyed
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2792278"></a><h3><a name="g-object-steal-data"></a>g_object_steal_data ()</h3><a class="indexterm" name="id2792290"></a><pre class="programlisting"><a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> g_object_steal_data (<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a> *object,
const <a
href="../glib/glib-Basic-Types.html#gchar"
>gchar</a> *key);</pre><p>
Remove a specified datum from the object's data associations,
without invoking the association's destroy handler.
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>object</tt></i> :</span></td><td><a href="gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> containing the associations
</td></tr><tr><td><span class="term"><i class="parameter"><tt>key</tt></i> :</span></td><td>name of the key
</td></tr><tr><td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td><td>the data if found, or <tt class="literal">NULL</tt> if no such data exists.
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2792383"></a><h3><a name="g-object-get-qdata"></a>g_object_get_qdata ()</h3><a class="indexterm" name="id2792394"></a><pre class="programlisting"><a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> g_object_get_qdata (<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a> *object,
<a
href="../glib/glib-Quarks.html#GQuark"
>GQuark</a> quark);</pre><p>
This function gets back user data pointers stored via
<a href="gobject-The-Base-Object-Type.html#g-object-set-qdata"><tt class="function">g_object_set_qdata()</tt></a>.
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>object</tt></i> :</span></td><td> The GObject to get a stored user data pointer from
</td></tr><tr><td><span class="term"><i class="parameter"><tt>quark</tt></i> :</span></td><td> A <a
href="../glib/glib-Quarks.html#GQuark"
><span class="type">GQuark</span></a>, naming the user data pointer
</td></tr><tr><td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td><td>The user data pointer set, or <tt class="literal">NULL</tt>
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2792499"></a><h3><a name="g-object-set-qdata"></a>g_object_set_qdata ()</h3><a class="indexterm" name="id2792510"></a><pre class="programlisting">void g_object_set_qdata (<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a> *object,
<a
href="../glib/glib-Quarks.html#GQuark"
>GQuark</a> quark,
<a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> data);</pre><p>
This sets an opaque, named pointer on an object.
The name is specified through a <a
href="../glib/glib-Quarks.html#GQuark"
><span class="type">GQuark</span></a> (retrived e.g. via
<a
href="../glib/glib-Quarks.html#g-quark-from-static-string"
><tt class="function">g_quark_from_static_string()</tt></a>), and the pointer
can be gotten back from the <i class="parameter"><tt>object</tt></i> with <a href="gobject-The-Base-Object-Type.html#g-object-get-qdata"><tt class="function">g_object_get_qdata()</tt></a>
until the <i class="parameter"><tt>object</tt></i> is finalized.
Setting a previously set user data pointer, overrides (frees)
the old pointer set, using <a
href="../glib/glib-Standard-Macros.html#NULL-CAPS"
><span class="type">NULL</span></a> as pointer essentially
removes the data stored.
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>object</tt></i> :</span></td><td>The GObject to set store a user data pointer
</td></tr><tr><td><span class="term"><i class="parameter"><tt>quark</tt></i> :</span></td><td> A <a
href="../glib/glib-Quarks.html#GQuark"
><span class="type">GQuark</span></a>, naming the user data pointer
</td></tr><tr><td><span class="term"><i class="parameter"><tt>data</tt></i> :</span></td><td> An opaque user data pointer
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2792666"></a><h3><a name="g-object-set-qdata-full"></a>g_object_set_qdata_full ()</h3><a class="indexterm" name="id2792677"></a><pre class="programlisting">void g_object_set_qdata_full (<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a> *object,
<a
href="../glib/glib-Quarks.html#GQuark"
>GQuark</a> quark,
<a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> data,
<a
href="../glib/glib-Datasets.html#GDestroyNotify"
>GDestroyNotify</a> destroy);</pre><p>
This function works like <a href="gobject-The-Base-Object-Type.html#g-object-set-qdata"><tt class="function">g_object_set_qdata()</tt></a>, but in addition,
a void (*destroy) (gpointer) function may be specified which is
called with <i class="parameter"><tt>data</tt></i> as argument when the <i class="parameter"><tt>object</tt></i> is finalized, or
the data is being overwritten by a call to <a href="gobject-The-Base-Object-Type.html#g-object-set-qdata"><tt class="function">g_object_set_qdata()</tt></a>
with the same <i class="parameter"><tt>quark</tt></i>.
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>object</tt></i> :</span></td><td> The GObject to set store a user data pointer
</td></tr><tr><td><span class="term"><i class="parameter"><tt>quark</tt></i> :</span></td><td> A <a
href="../glib/glib-Quarks.html#GQuark"
><span class="type">GQuark</span></a>, naming the user data pointer
</td></tr><tr><td><span class="term"><i class="parameter"><tt>data</tt></i> :</span></td><td> An opaque user data pointer
</td></tr><tr><td><span class="term"><i class="parameter"><tt>destroy</tt></i> :</span></td><td>Function to invoke with <i class="parameter"><tt>data</tt></i> as argument, when <i class="parameter"><tt>data</tt></i> needs to be freed
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2792853"></a><h3><a name="g-object-steal-qdata"></a>g_object_steal_qdata ()</h3><a class="indexterm" name="id2792864"></a><pre class="programlisting"><a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> g_object_steal_qdata (<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a> *object,
<a
href="../glib/glib-Quarks.html#GQuark"
>GQuark</a> quark);</pre><p>
This function gets back user data pointers stored via
<a href="gobject-The-Base-Object-Type.html#g-object-set-qdata"><tt class="function">g_object_set_qdata()</tt></a> and removes the <i class="parameter"><tt>data</tt></i> from object
without invoking it's <tt class="function">destroy()</tt> function (if any was
set).
Usually, calling this function is only required to update
user data pointers with a destroy notifier, for example:
</p><pre class="programlisting">
void
object_add_to_user_list (GObject *object,
const gchar *new_string)
{
/* the quark, naming the object data */
GQuark quark_string_list = g_quark_from_static_string ("my-string-list");
/* retrive the old string list */
GList *list = g_object_steal_qdata (object, quark_string_list);
/* prepend new string */
list = g_list_prepend (list, g_strdup (new_string));
/* this changed 'list', so we need to set it again */
g_object_set_qdata_full (object, quark_string_list, list, free_string_list);
}
static void
free_string_list (gpointer data)
{
GList *node, *list = data;
for (node = list; node; node = node->next)
g_free (node->data);
g_list_free (list);
}
</pre><p>
Using <a href="gobject-The-Base-Object-Type.html#g-object-get-qdata"><tt class="function">g_object_get_qdata()</tt></a> in the above example, instead of <a href="gobject-The-Base-Object-Type.html#g-object-steal-qdata"><tt class="function">g_object_steal_qdata()</tt></a>
would have left the destroy function set, and thus the partial string list would
have been freed upon <a href="gobject-The-Base-Object-Type.html#g-object-set-qdata-full"><tt class="function">g_object_set_qdata_full()</tt></a>.
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>object</tt></i> :</span></td><td> The GObject to get a stored user data pointer from
</td></tr><tr><td><span class="term"><i class="parameter"><tt>quark</tt></i> :</span></td><td> A <a
href="../glib/glib-Quarks.html#GQuark"
><span class="type">GQuark</span></a>, naming the user data pointer
</td></tr><tr><td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td><td>The user data pointer set, or <tt class="literal">NULL</tt>
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2793042"></a><h3><a name="g-object-set-property"></a>g_object_set_property ()</h3><a class="indexterm" name="id2793053"></a><pre class="programlisting">void g_object_set_property (<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a> *object,
const <a
href="../glib/glib-Basic-Types.html#gchar"
>gchar</a> *property_name,
const <a href="gobject-Generic-values.html#GValue">GValue</a> *value);</pre><p>
Sets a property on an object.
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>object</tt></i> :</span></td><td>a <a href="gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a>
</td></tr><tr><td><span class="term"><i class="parameter"><tt>property_name</tt></i> :</span></td><td>the name of the property to set
</td></tr><tr><td><span class="term"><i class="parameter"><tt>value</tt></i> :</span></td><td>the value
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2793151"></a><h3><a name="g-object-get-property"></a>g_object_get_property ()</h3><a class="indexterm" name="id2793163"></a><pre class="programlisting">void g_object_get_property (<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a> *object,
const <a
href="../glib/glib-Basic-Types.html#gchar"
>gchar</a> *property_name,
<a href="gobject-Generic-values.html#GValue">GValue</a> *value);</pre><p>
Gets a property of an object.
</p><p>
In general, a copy is made of the property contents and the caller is
responsible for freeing the memory in the appropriate manner for the type,
for instance by calling <a
href="../glib/glib-Memory-Allocation.html#g-free"
><tt class="function">g_free()</tt></a> or <a href="gobject-The-Base-Object-Type.html#g-object-unref"><tt class="function">g_object_unref()</tt></a>.
</p><p>
See <a href="gobject-The-Base-Object-Type.html#g-object-get"><tt class="function">g_object_get()</tt></a>.
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>object</tt></i> :</span></td><td>a <a href="gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a>
</td></tr><tr><td><span class="term"><i class="parameter"><tt>property_name</tt></i> :</span></td><td>the name of the property to get
</td></tr><tr><td><span class="term"><i class="parameter"><tt>value</tt></i> :</span></td><td>return location for the property value
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2793302"></a><h3><a name="g-object-new-valist"></a>g_object_new_valist ()</h3><a class="indexterm" name="id2793313"></a><pre class="programlisting"><a href="gobject-The-Base-Object-Type.html#GObject">GObject</a>* g_object_new_valist (<a href="gobject-Type-Information.html#GType">GType</a> object_type,
const <a
href="../glib/glib-Basic-Types.html#gchar"
>gchar</a> *first_property_name,
va_list var_args);</pre><p>
Creates a new instance of a <a href="gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> subtype and sets its properties.
</p><p>
Construction parameters (see <span class="type">G_PARAM_CONSTRUCT</span>, <span class="type">G_PARAM_CONSTRUCT_ONLY</span>)
which are not explicitly specified are set to their default values.
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>object_type</tt></i> :</span></td><td>the type id of the <a href="gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> subtype to instantiate
</td></tr><tr><td><span class="term"><i class="parameter"><tt>first_property_name</tt></i> :</span></td><td>the name of the first property
</td></tr><tr><td><span class="term"><i class="parameter"><tt>var_args</tt></i> :</span></td><td>the value of the first property, followed optionally by more
name/value pairs, followed by <tt class="literal">NULL</tt>
</td></tr><tr><td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td><td>a new instance of <i class="parameter"><tt>object_type</tt></i>
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2793466"></a><h3><a name="g-object-set-valist"></a>g_object_set_valist ()</h3><a class="indexterm" name="id2793477"></a><pre class="programlisting">void g_object_set_valist (<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a> *object,
const <a
href="../glib/glib-Basic-Types.html#gchar"
>gchar</a> *first_property_name,
va_list var_args);</pre><p>
Sets properties on an object.
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>object</tt></i> :</span></td><td>a <a href="gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a>
</td></tr><tr><td><span class="term"><i class="parameter"><tt>first_property_name</tt></i> :</span></td><td>name of the first property to set
</td></tr><tr><td><span class="term"><i class="parameter"><tt>var_args</tt></i> :</span></td><td>value for the first property, followed optionally by more
name/value pairs, followed by <tt class="literal">NULL</tt>
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2793582"></a><h3><a name="g-object-get-valist"></a>g_object_get_valist ()</h3><a class="indexterm" name="id2793593"></a><pre class="programlisting">void g_object_get_valist (<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a> *object,
const <a
href="../glib/glib-Basic-Types.html#gchar"
>gchar</a> *first_property_name,
va_list var_args);</pre><p>
Gets properties of an object.
</p><p>
In general, a copy is made of the property contents and the caller is
responsible for freeing the memory in the appropriate manner for the type,
for instance by calling <a
href="../glib/glib-Memory-Allocation.html#g-free"
><tt class="function">g_free()</tt></a> or <a href="gobject-The-Base-Object-Type.html#g-object-unref"><tt class="function">g_object_unref()</tt></a>.
</p><p>
See <a href="gobject-The-Base-Object-Type.html#g-object-get"><tt class="function">g_object_get()</tt></a>.
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>object</tt></i> :</span></td><td>a <a href="gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a>
</td></tr><tr><td><span class="term"><i class="parameter"><tt>first_property_name</tt></i> :</span></td><td>name of the first property to get
</td></tr><tr><td><span class="term"><i class="parameter"><tt>var_args</tt></i> :</span></td><td>return location for the first property, followed optionally by more
name/return location pairs, followed by <tt class="literal">NULL</tt>
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2793739"></a><h3><a name="g-object-watch-closure"></a>g_object_watch_closure ()</h3><a class="indexterm" name="id2793751"></a><pre class="programlisting">void g_object_watch_closure (<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a> *object,
<a href="gobject-Closures.html#GClosure">GClosure</a> *closure);</pre><p>
This function essentially limits the life time of the <i class="parameter"><tt>closure</tt></i>
to the life time of the object. That is, when the object is finalized,
the <i class="parameter"><tt>closure</tt></i> is invalidated by calling <a href="gobject-Closures.html#g-closure-invalidate"><tt class="function">g_closure_invalidate()</tt></a> on it,
in order to prevent invocations of the closure with a finalized
(nonexisting) object. Also, <a href="gobject-The-Base-Object-Type.html#g-object-ref"><tt class="function">g_object_ref()</tt></a> and <a href="gobject-The-Base-Object-Type.html#g-object-unref"><tt class="function">g_object_unref()</tt></a> are added
as marshal guards to the <i class="parameter"><tt>closure</tt></i>, to ensure that an extra reference
count is held on <i class="parameter"><tt>object</tt></i> during invocation of the <i class="parameter"><tt>closure</tt></i>.
Usually, this function will be called on closures that use this <i class="parameter"><tt>object</tt></i>
as closure data.
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>object</tt></i> :</span></td><td> GObject restricting lifetime of <i class="parameter"><tt>closure</tt></i>
</td></tr><tr><td><span class="term"><i class="parameter"><tt>closure</tt></i> :</span></td><td>GClosure to watch
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2793901"></a><h3><a name="g-object-run-dispose"></a>g_object_run_dispose ()</h3><a class="indexterm" name="id2793913"></a><pre class="programlisting">void g_object_run_dispose (<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a> *object);</pre><p>
Releases all references to other objects. This can be used to break
reference cycles.
</p><div class="note" style="margin-left: 0.5in; margin-right: 0.5in;"><h3 class="title">Note</h3><p>
This functions should only be called from object system implementations.
</p></div><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>object</tt></i> :</span></td><td>a <a href="gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a>
</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2793974"></a><h3><a name="G-OBJECT-WARN-INVALID-PROPERTY-ID-CAPS"></a>G_OBJECT_WARN_INVALID_PROPERTY_ID()</h3><a class="indexterm" name="id2793987"></a><pre class="programlisting">#define G_OBJECT_WARN_INVALID_PROPERTY_ID(object, property_id, pspec)</pre><p>
This macros should be used to emit a standard warning about unexpected
properties in <tt class="function">set_property()</tt> and <tt class="function">get_property()</tt> implementations.
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>object</tt></i> :</span></td><td>the <a href="gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> on which <tt class="function">set_property()</tt> or <tt class="function">get_property()</tt> was called
</td></tr><tr><td><span class="term"><i class="parameter"><tt>property_id</tt></i> :</span></td><td>the numeric id of the property
</td></tr><tr><td><span class="term"><i class="parameter"><tt>pspec</tt></i> :</span></td><td>the <a href="gobject-GParamSpec.html#GParamSpec"><span class="type">GParamSpec</span></a> of the property
</td></tr></tbody></table></div></div></div><div class="refsect1" lang="en"><a name="id2794113"></a><h2>Signals</h2><div class="refsect2" lang="en"><a name="id2794119"></a><h3><a name="GObject-notify"></a>The "notify" signal</h3><pre class="programlisting">void user_function (<a href="gobject-The-Base-Object-Type.html#GObject">GObject</a> *gobject,
<a href="gobject-GParamSpec.html#GParamSpec">GParamSpec</a> *arg1,
<a
href="../glib/glib-Basic-Types.html#gpointer"
>gpointer</a> user_data);</pre><p>
The notify signal is emitted on an object when one of its properties
has been changed. Note that getting this signal doesn't guarantee that the
value of the property has actually changed, it may also be emitted when
the setter for the property is called to reinstate the previous value.
</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><i class="parameter"><tt>gobject</tt></i> :</span></td><td>the object which received the signal.
</td></tr><tr><td><span class="term"><i class="parameter"><tt>pspec</tt></i> :</span></td><td>the <a href="gobject-GParamSpec.html#GParamSpec"><span class="type">GParamSpec</span></a> of the property which changed
</td></tr><tr><td><span class="term"><i class="parameter"><tt>user_data</tt></i> :</span></td><td>user data set when the signal handler was connected.</td></tr></tbody></table></div></div></div></div><table class="navigation" width="100%" summary="Navigation footer" cellpadding="2" cellspacing="0"><tr valign="middle"><td align="left"><a accesskey="p" href="GTypeModule.html"><b><< GTypeModule</b></a></td><td align="right"><a accesskey="n" href="gobject-Enumeration-and-Flag-Types.html"><b>Enums and Flags >></b></a></td></tr></table></body></html>