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diff --git a/gtk+-mingw/share/gtk-doc/html/gobject/gobject-Signals.html b/gtk+-mingw/share/gtk-doc/html/gobject/gobject-Signals.html deleted file mode 100644 index 45cd865..0000000 --- a/gtk+-mingw/share/gtk-doc/html/gobject/gobject-Signals.html +++ /dev/null @@ -1,2647 +0,0 @@ -<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> -<html> -<head> -<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> -<title>Signals</title> -<meta name="generator" content="DocBook XSL Stylesheets V1.76.1"> -<link rel="home" href="index.html" title="GObject Reference Manual"> -<link rel="up" href="rn01.html" title="API Reference"> -<link rel="prev" href="gobject-Varargs-Value-Collection.html" title="Varargs Value Collection"> -<link rel="next" href="gobject-Closures.html" title="Closures"> -<meta name="generator" content="GTK-Doc V1.18 (XML mode)"> -<link rel="stylesheet" href="style.css" type="text/css"> -</head> -<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> -<table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="2"> -<tr valign="middle"> -<td><a accesskey="p" href="gobject-Varargs-Value-Collection.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-Closures.html"><img src="right.png" width="24" height="24" border="0" alt="Next"></a></td> -</tr> -<tr><td colspan="5" class="shortcuts"> -<a href="#gobject-Signals.synopsis" class="shortcut">Top</a> - | - <a href="#gobject-Signals.description" class="shortcut">Description</a> -</td></tr> -</table> -<div class="refentry"> -<a name="gobject-Signals"></a><div class="titlepage"></div> -<div class="refnamediv"><table width="100%"><tr> -<td valign="top"> -<h2><span class="refentrytitle"><a name="gobject-Signals.top_of_page"></a>Signals</span></h2> -<p>Signals — A means for customization of object behaviour - and a general purpose notification mechanism</p> -</td> -<td valign="top" align="right"></td> -</tr></table></div> -<div class="refsynopsisdiv"> -<a name="gobject-Signals.synopsis"></a><h2>Synopsis</h2> -<pre class="synopsis"> -#include <glib-object.h> - -struct <a class="link" href="gobject-Signals.html#GSignalInvocationHint" title="struct GSignalInvocationHint">GSignalInvocationHint</a>; -<a href="./../glib/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> (<a class="link" href="gobject-Signals.html#GSignalAccumulator" title="GSignalAccumulator ()">*GSignalAccumulator</a>) (<em class="parameter"><code><a class="link" href="gobject-Signals.html#GSignalInvocationHint" title="struct GSignalInvocationHint"><span class="type">GSignalInvocationHint</span></a> *ihint</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Generic-values.html#GValue" title="GValue"><span class="type">GValue</span></a> *return_accu</code></em>, - <em class="parameter"><code>const <a class="link" href="gobject-Generic-values.html#GValue" title="GValue"><span class="type">GValue</span></a> *handler_return</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> data</code></em>); -typedef <a class="link" href="gobject-Signals.html#GSignalCMarshaller" title="GSignalCMarshaller">GSignalCMarshaller</a>; -typedef <a class="link" href="gobject-Signals.html#GSignalCVaMarshaller" title="GSignalCVaMarshaller">GSignalCVaMarshaller</a>; -<a href="./../glib/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> (<a class="link" href="gobject-Signals.html#GSignalEmissionHook" title="GSignalEmissionHook ()">*GSignalEmissionHook</a>) (<em class="parameter"><code><a class="link" href="gobject-Signals.html#GSignalInvocationHint" title="struct GSignalInvocationHint"><span class="type">GSignalInvocationHint</span></a> *ihint</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> n_param_values</code></em>, - <em class="parameter"><code>const <a class="link" href="gobject-Generic-values.html#GValue" title="GValue"><span class="type">GValue</span></a> *param_values</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> data</code></em>); -enum <a class="link" href="gobject-Signals.html#GSignalFlags" title="enum GSignalFlags">GSignalFlags</a>; -enum <a class="link" href="gobject-Signals.html#GSignalMatchType" title="enum GSignalMatchType">GSignalMatchType</a>; -struct <a class="link" href="gobject-Signals.html#GSignalQuery" title="struct GSignalQuery">GSignalQuery</a>; -#define <a class="link" href="gobject-Signals.html#G-SIGNAL-TYPE-STATIC-SCOPE:CAPS" title="G_SIGNAL_TYPE_STATIC_SCOPE">G_SIGNAL_TYPE_STATIC_SCOPE</a> -#define <a class="link" href="gobject-Signals.html#G-SIGNAL-MATCH-MASK:CAPS" title="G_SIGNAL_MATCH_MASK">G_SIGNAL_MATCH_MASK</a> -#define <a class="link" href="gobject-Signals.html#G-SIGNAL-FLAGS-MASK:CAPS" title="G_SIGNAL_FLAGS_MASK">G_SIGNAL_FLAGS_MASK</a> -<a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a> <a class="link" href="gobject-Signals.html#g-signal-new" title="g_signal_new ()">g_signal_new</a> (<em class="parameter"><code>const <a href="./../glib/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *signal_name</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Type-Information.html#GType" title="GType"><span class="type">GType</span></a> itype</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Signals.html#GSignalFlags" title="enum GSignalFlags"><span class="type">GSignalFlags</span></a> signal_flags</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> class_offset</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Signals.html#GSignalAccumulator" title="GSignalAccumulator ()"><span class="type">GSignalAccumulator</span></a> accumulator</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> accu_data</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Signals.html#GSignalCMarshaller" title="GSignalCMarshaller"><span class="type">GSignalCMarshaller</span></a> c_marshaller</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Type-Information.html#GType" title="GType"><span class="type">GType</span></a> return_type</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> n_params</code></em>, - <em class="parameter"><code>...</code></em>); -<a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a> <a class="link" href="gobject-Signals.html#g-signal-newv" title="g_signal_newv ()">g_signal_newv</a> (<em class="parameter"><code>const <a href="./../glib/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *signal_name</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Type-Information.html#GType" title="GType"><span class="type">GType</span></a> itype</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Signals.html#GSignalFlags" title="enum GSignalFlags"><span class="type">GSignalFlags</span></a> signal_flags</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Closures.html#GClosure" title="struct GClosure"><span class="type">GClosure</span></a> *class_closure</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Signals.html#GSignalAccumulator" title="GSignalAccumulator ()"><span class="type">GSignalAccumulator</span></a> accumulator</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> accu_data</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Signals.html#GSignalCMarshaller" title="GSignalCMarshaller"><span class="type">GSignalCMarshaller</span></a> c_marshaller</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Type-Information.html#GType" title="GType"><span class="type">GType</span></a> return_type</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> n_params</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Type-Information.html#GType" title="GType"><span class="type">GType</span></a> *param_types</code></em>); -<a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a> <a class="link" href="gobject-Signals.html#g-signal-new-valist" title="g_signal_new_valist ()">g_signal_new_valist</a> (<em class="parameter"><code>const <a href="./../glib/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *signal_name</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Type-Information.html#GType" title="GType"><span class="type">GType</span></a> itype</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Signals.html#GSignalFlags" title="enum GSignalFlags"><span class="type">GSignalFlags</span></a> signal_flags</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Closures.html#GClosure" title="struct GClosure"><span class="type">GClosure</span></a> *class_closure</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Signals.html#GSignalAccumulator" title="GSignalAccumulator ()"><span class="type">GSignalAccumulator</span></a> accumulator</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> accu_data</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Signals.html#GSignalCMarshaller" title="GSignalCMarshaller"><span class="type">GSignalCMarshaller</span></a> c_marshaller</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Type-Information.html#GType" title="GType"><span class="type">GType</span></a> return_type</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> n_params</code></em>, - <em class="parameter"><code><span class="type">va_list</span> args</code></em>); -<span class="returnvalue">void</span> <a class="link" href="gobject-Signals.html#g-signal-set-va-marshaller" title="g_signal_set_va_marshaller ()">g_signal_set_va_marshaller</a> (<em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> signal_id</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Type-Information.html#GType" title="GType"><span class="type">GType</span></a> instance_type</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Signals.html#GSignalCVaMarshaller" title="GSignalCVaMarshaller"><span class="type">GSignalCVaMarshaller</span></a> va_marshaller</code></em>); -<span class="returnvalue">void</span> <a class="link" href="gobject-Signals.html#g-signal-query" title="g_signal_query ()">g_signal_query</a> (<em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> signal_id</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Signals.html#GSignalQuery" title="struct GSignalQuery"><span class="type">GSignalQuery</span></a> *query</code></em>); -<a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a> <a class="link" href="gobject-Signals.html#g-signal-lookup" title="g_signal_lookup ()">g_signal_lookup</a> (<em class="parameter"><code>const <a href="./../glib/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *name</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Type-Information.html#GType" title="GType"><span class="type">GType</span></a> itype</code></em>); -const <a href="./../glib/glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> * <a class="link" href="gobject-Signals.html#g-signal-name" title="g_signal_name ()">g_signal_name</a> (<em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> signal_id</code></em>); -<a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a> * <a class="link" href="gobject-Signals.html#g-signal-list-ids" title="g_signal_list_ids ()">g_signal_list_ids</a> (<em class="parameter"><code><a class="link" href="gobject-Type-Information.html#GType" title="GType"><span class="type">GType</span></a> itype</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> *n_ids</code></em>); -<span class="returnvalue">void</span> <a class="link" href="gobject-Signals.html#g-signal-emit" title="g_signal_emit ()">g_signal_emit</a> (<em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> instance</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> signal_id</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Quarks.html#GQuark"><span class="type">GQuark</span></a> detail</code></em>, - <em class="parameter"><code>...</code></em>); -<span class="returnvalue">void</span> <a class="link" href="gobject-Signals.html#g-signal-emit-by-name" title="g_signal_emit_by_name ()">g_signal_emit_by_name</a> (<em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> instance</code></em>, - <em class="parameter"><code>const <a href="./../glib/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *detailed_signal</code></em>, - <em class="parameter"><code>...</code></em>); -<span class="returnvalue">void</span> <a class="link" href="gobject-Signals.html#g-signal-emitv" title="g_signal_emitv ()">g_signal_emitv</a> (<em class="parameter"><code>const <a class="link" href="gobject-Generic-values.html#GValue" title="GValue"><span class="type">GValue</span></a> *instance_and_params</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> signal_id</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Quarks.html#GQuark"><span class="type">GQuark</span></a> detail</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Generic-values.html#GValue" title="GValue"><span class="type">GValue</span></a> *return_value</code></em>); -<span class="returnvalue">void</span> <a class="link" href="gobject-Signals.html#g-signal-emit-valist" title="g_signal_emit_valist ()">g_signal_emit_valist</a> (<em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> instance</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> signal_id</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Quarks.html#GQuark"><span class="type">GQuark</span></a> detail</code></em>, - <em class="parameter"><code><span class="type">va_list</span> var_args</code></em>); -#define <a class="link" href="gobject-Signals.html#g-signal-connect" title="g_signal_connect()">g_signal_connect</a> (instance, - detailed_signal, - c_handler, - data) -#define <a class="link" href="gobject-Signals.html#g-signal-connect-after" title="g_signal_connect_after()">g_signal_connect_after</a> (instance, - detailed_signal, - c_handler, - data) -#define <a class="link" href="gobject-Signals.html#g-signal-connect-swapped" title="g_signal_connect_swapped()">g_signal_connect_swapped</a> (instance, - detailed_signal, - c_handler, - data) -<a href="./../glib/glib/glib-Basic-Types.html#gulong"><span class="returnvalue">gulong</span></a> <a class="link" href="gobject-Signals.html#g-signal-connect-object" title="g_signal_connect_object ()">g_signal_connect_object</a> (<em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> instance</code></em>, - <em class="parameter"><code>const <a href="./../glib/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *detailed_signal</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Closures.html#GCallback" title="GCallback ()"><span class="type">GCallback</span></a> c_handler</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> gobject</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Signals.html#GConnectFlags" title="enum GConnectFlags"><span class="type">GConnectFlags</span></a> connect_flags</code></em>); -enum <a class="link" href="gobject-Signals.html#GConnectFlags" title="enum GConnectFlags">GConnectFlags</a>; -<a href="./../glib/glib/glib-Basic-Types.html#gulong"><span class="returnvalue">gulong</span></a> <a class="link" href="gobject-Signals.html#g-signal-connect-data" title="g_signal_connect_data ()">g_signal_connect_data</a> (<em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> instance</code></em>, - <em class="parameter"><code>const <a href="./../glib/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *detailed_signal</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Closures.html#GCallback" title="GCallback ()"><span class="type">GCallback</span></a> c_handler</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> data</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Closures.html#GClosureNotify" title="GClosureNotify ()"><span class="type">GClosureNotify</span></a> destroy_data</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Signals.html#GConnectFlags" title="enum GConnectFlags"><span class="type">GConnectFlags</span></a> connect_flags</code></em>); -<a href="./../glib/glib/glib-Basic-Types.html#gulong"><span class="returnvalue">gulong</span></a> <a class="link" href="gobject-Signals.html#g-signal-connect-closure" title="g_signal_connect_closure ()">g_signal_connect_closure</a> (<em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> instance</code></em>, - <em class="parameter"><code>const <a href="./../glib/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *detailed_signal</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Closures.html#GClosure" title="struct GClosure"><span class="type">GClosure</span></a> *closure</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> after</code></em>); -<a href="./../glib/glib/glib-Basic-Types.html#gulong"><span class="returnvalue">gulong</span></a> <a class="link" href="gobject-Signals.html#g-signal-connect-closure-by-id" title="g_signal_connect_closure_by_id ()">g_signal_connect_closure_by_id</a> (<em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> instance</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> signal_id</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Quarks.html#GQuark"><span class="type">GQuark</span></a> detail</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Closures.html#GClosure" title="struct GClosure"><span class="type">GClosure</span></a> *closure</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> after</code></em>); -<span class="returnvalue">void</span> <a class="link" href="gobject-Signals.html#g-signal-handler-block" title="g_signal_handler_block ()">g_signal_handler_block</a> (<em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> instance</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gulong"><span class="type">gulong</span></a> handler_id</code></em>); -<span class="returnvalue">void</span> <a class="link" href="gobject-Signals.html#g-signal-handler-unblock" title="g_signal_handler_unblock ()">g_signal_handler_unblock</a> (<em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> instance</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gulong"><span class="type">gulong</span></a> handler_id</code></em>); -<span class="returnvalue">void</span> <a class="link" href="gobject-Signals.html#g-signal-handler-disconnect" title="g_signal_handler_disconnect ()">g_signal_handler_disconnect</a> (<em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> instance</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gulong"><span class="type">gulong</span></a> handler_id</code></em>); -<a href="./../glib/glib/glib-Basic-Types.html#gulong"><span class="returnvalue">gulong</span></a> <a class="link" href="gobject-Signals.html#g-signal-handler-find" title="g_signal_handler_find ()">g_signal_handler_find</a> (<em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> instance</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Signals.html#GSignalMatchType" title="enum GSignalMatchType"><span class="type">GSignalMatchType</span></a> mask</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> signal_id</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Quarks.html#GQuark"><span class="type">GQuark</span></a> detail</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Closures.html#GClosure" title="struct GClosure"><span class="type">GClosure</span></a> *closure</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> func</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> data</code></em>); -<a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a> <a class="link" href="gobject-Signals.html#g-signal-handlers-block-matched" title="g_signal_handlers_block_matched ()">g_signal_handlers_block_matched</a> (<em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> instance</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Signals.html#GSignalMatchType" title="enum GSignalMatchType"><span class="type">GSignalMatchType</span></a> mask</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> signal_id</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Quarks.html#GQuark"><span class="type">GQuark</span></a> detail</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Closures.html#GClosure" title="struct GClosure"><span class="type">GClosure</span></a> *closure</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> func</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> data</code></em>); -<a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a> <a class="link" href="gobject-Signals.html#g-signal-handlers-unblock-matched" title="g_signal_handlers_unblock_matched ()">g_signal_handlers_unblock_matched</a> (<em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> instance</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Signals.html#GSignalMatchType" title="enum GSignalMatchType"><span class="type">GSignalMatchType</span></a> mask</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> signal_id</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Quarks.html#GQuark"><span class="type">GQuark</span></a> detail</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Closures.html#GClosure" title="struct GClosure"><span class="type">GClosure</span></a> *closure</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> func</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> data</code></em>); -<a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a> <a class="link" href="gobject-Signals.html#g-signal-handlers-disconnect-matched" title="g_signal_handlers_disconnect_matched ()">g_signal_handlers_disconnect_matched</a> - (<em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> instance</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Signals.html#GSignalMatchType" title="enum GSignalMatchType"><span class="type">GSignalMatchType</span></a> mask</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> signal_id</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Quarks.html#GQuark"><span class="type">GQuark</span></a> detail</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Closures.html#GClosure" title="struct GClosure"><span class="type">GClosure</span></a> *closure</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> func</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> data</code></em>); -<a href="./../glib/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> <a class="link" href="gobject-Signals.html#g-signal-handler-is-connected" title="g_signal_handler_is_connected ()">g_signal_handler_is_connected</a> (<em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> instance</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gulong"><span class="type">gulong</span></a> handler_id</code></em>); -#define <a class="link" href="gobject-Signals.html#g-signal-handlers-block-by-func" title="g_signal_handlers_block_by_func()">g_signal_handlers_block_by_func</a> (instance, - func, - data) -#define <a class="link" href="gobject-Signals.html#g-signal-handlers-unblock-by-func" title="g_signal_handlers_unblock_by_func()">g_signal_handlers_unblock_by_func</a> (instance, - func, - data) -#define <a class="link" href="gobject-Signals.html#g-signal-handlers-disconnect-by-func" title="g_signal_handlers_disconnect_by_func()">g_signal_handlers_disconnect_by_func</a>(instance, - func, - data) -#define <a class="link" href="gobject-Signals.html#g-signal-handlers-disconnect-by-data" title="g_signal_handlers_disconnect_by_data()">g_signal_handlers_disconnect_by_data</a>(instance, - data) -<a href="./../glib/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> <a class="link" href="gobject-Signals.html#g-signal-has-handler-pending" title="g_signal_has_handler_pending ()">g_signal_has_handler_pending</a> (<em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> instance</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> signal_id</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Quarks.html#GQuark"><span class="type">GQuark</span></a> detail</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> may_be_blocked</code></em>); -<span class="returnvalue">void</span> <a class="link" href="gobject-Signals.html#g-signal-stop-emission" title="g_signal_stop_emission ()">g_signal_stop_emission</a> (<em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> instance</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> signal_id</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Quarks.html#GQuark"><span class="type">GQuark</span></a> detail</code></em>); -<span class="returnvalue">void</span> <a class="link" href="gobject-Signals.html#g-signal-stop-emission-by-name" title="g_signal_stop_emission_by_name ()">g_signal_stop_emission_by_name</a> (<em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> instance</code></em>, - <em class="parameter"><code>const <a href="./../glib/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *detailed_signal</code></em>); -<span class="returnvalue">void</span> <a class="link" href="gobject-Signals.html#g-signal-override-class-closure" title="g_signal_override_class_closure ()">g_signal_override_class_closure</a> (<em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> signal_id</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Type-Information.html#GType" title="GType"><span class="type">GType</span></a> instance_type</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Closures.html#GClosure" title="struct GClosure"><span class="type">GClosure</span></a> *class_closure</code></em>); -<span class="returnvalue">void</span> <a class="link" href="gobject-Signals.html#g-signal-chain-from-overridden" title="g_signal_chain_from_overridden ()">g_signal_chain_from_overridden</a> (<em class="parameter"><code>const <a class="link" href="gobject-Generic-values.html#GValue" title="GValue"><span class="type">GValue</span></a> *instance_and_params</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Generic-values.html#GValue" title="GValue"><span class="type">GValue</span></a> *return_value</code></em>); -<a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a> <a class="link" href="gobject-Signals.html#g-signal-new-class-handler" title="g_signal_new_class_handler ()">g_signal_new_class_handler</a> (<em class="parameter"><code>const <a href="./../glib/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *signal_name</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Type-Information.html#GType" title="GType"><span class="type">GType</span></a> itype</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Signals.html#GSignalFlags" title="enum GSignalFlags"><span class="type">GSignalFlags</span></a> signal_flags</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Closures.html#GCallback" title="GCallback ()"><span class="type">GCallback</span></a> class_handler</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Signals.html#GSignalAccumulator" title="GSignalAccumulator ()"><span class="type">GSignalAccumulator</span></a> accumulator</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> accu_data</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Signals.html#GSignalCMarshaller" title="GSignalCMarshaller"><span class="type">GSignalCMarshaller</span></a> c_marshaller</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Type-Information.html#GType" title="GType"><span class="type">GType</span></a> return_type</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> n_params</code></em>, - <em class="parameter"><code>...</code></em>); -<span class="returnvalue">void</span> <a class="link" href="gobject-Signals.html#g-signal-override-class-handler" title="g_signal_override_class_handler ()">g_signal_override_class_handler</a> (<em class="parameter"><code>const <a href="./../glib/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *signal_name</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Type-Information.html#GType" title="GType"><span class="type">GType</span></a> instance_type</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Closures.html#GCallback" title="GCallback ()"><span class="type">GCallback</span></a> class_handler</code></em>); -<span class="returnvalue">void</span> <a class="link" href="gobject-Signals.html#g-signal-chain-from-overridden-handler" title="g_signal_chain_from_overridden_handler ()">g_signal_chain_from_overridden_handler</a> - (<em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> instance</code></em>, - <em class="parameter"><code>...</code></em>); -<a href="./../glib/glib/glib-Basic-Types.html#gulong"><span class="returnvalue">gulong</span></a> <a class="link" href="gobject-Signals.html#g-signal-add-emission-hook" title="g_signal_add_emission_hook ()">g_signal_add_emission_hook</a> (<em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> signal_id</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Quarks.html#GQuark"><span class="type">GQuark</span></a> detail</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Signals.html#GSignalEmissionHook" title="GSignalEmissionHook ()"><span class="type">GSignalEmissionHook</span></a> hook_func</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> hook_data</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Datasets.html#GDestroyNotify"><span class="type">GDestroyNotify</span></a> data_destroy</code></em>); -<span class="returnvalue">void</span> <a class="link" href="gobject-Signals.html#g-signal-remove-emission-hook" title="g_signal_remove_emission_hook ()">g_signal_remove_emission_hook</a> (<em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> signal_id</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gulong"><span class="type">gulong</span></a> hook_id</code></em>); -<a href="./../glib/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> <a class="link" href="gobject-Signals.html#g-signal-parse-name" title="g_signal_parse_name ()">g_signal_parse_name</a> (<em class="parameter"><code>const <a href="./../glib/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *detailed_signal</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Type-Information.html#GType" title="GType"><span class="type">GType</span></a> itype</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> *signal_id_p</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Quarks.html#GQuark"><span class="type">GQuark</span></a> *detail_p</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> force_detail_quark</code></em>); -<a class="link" href="gobject-Signals.html#GSignalInvocationHint" title="struct GSignalInvocationHint"><span class="returnvalue">GSignalInvocationHint</span></a> * <a class="link" href="gobject-Signals.html#g-signal-get-invocation-hint" title="g_signal_get_invocation_hint ()">g_signal_get_invocation_hint</a> (<em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> instance</code></em>); -<a class="link" href="gobject-Closures.html#GClosure" title="struct GClosure"><span class="returnvalue">GClosure</span></a> * <a class="link" href="gobject-Signals.html#g-signal-type-cclosure-new" title="g_signal_type_cclosure_new ()">g_signal_type_cclosure_new</a> (<em class="parameter"><code><a class="link" href="gobject-Type-Information.html#GType" title="GType"><span class="type">GType</span></a> itype</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> struct_offset</code></em>); -<a href="./../glib/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> <a class="link" href="gobject-Signals.html#g-signal-accumulator-first-wins" title="g_signal_accumulator_first_wins ()">g_signal_accumulator_first_wins</a> (<em class="parameter"><code><a class="link" href="gobject-Signals.html#GSignalInvocationHint" title="struct GSignalInvocationHint"><span class="type">GSignalInvocationHint</span></a> *ihint</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Generic-values.html#GValue" title="GValue"><span class="type">GValue</span></a> *return_accu</code></em>, - <em class="parameter"><code>const <a class="link" href="gobject-Generic-values.html#GValue" title="GValue"><span class="type">GValue</span></a> *handler_return</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> dummy</code></em>); -<a href="./../glib/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> <a class="link" href="gobject-Signals.html#g-signal-accumulator-true-handled" title="g_signal_accumulator_true_handled ()">g_signal_accumulator_true_handled</a> (<em class="parameter"><code><a class="link" href="gobject-Signals.html#GSignalInvocationHint" title="struct GSignalInvocationHint"><span class="type">GSignalInvocationHint</span></a> *ihint</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Generic-values.html#GValue" title="GValue"><span class="type">GValue</span></a> *return_accu</code></em>, - <em class="parameter"><code>const <a class="link" href="gobject-Generic-values.html#GValue" title="GValue"><span class="type">GValue</span></a> *handler_return</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> dummy</code></em>); -</pre> -</div> -<div class="refsect1"> -<a name="gobject-Signals.description"></a><h2>Description</h2> -<p> -The basic concept of the signal system is that of the -<span class="emphasis"><em>emission</em></span> of a signal. Signals are introduced -per-type and are identified through strings. Signals introduced -for a parent type are available in derived types as well, so -basically they are a per-type facility that is inherited. A signal -emission mainly involves invocation of a certain set of callbacks -in precisely defined manner. There are two main categories of such -callbacks, per-object -<sup>[<a name="idp21360704" href="#ftn.idp21360704" class="footnote">10</a>]</sup> -ones and user provided ones. -The per-object callbacks are most often referred to as "object method -handler" or "default (signal) handler", while user provided callbacks are -usually just called "signal handler". -The object method handler is provided at signal creation time (this most -frequently happens at the end of an object class' creation), while user -provided handlers are frequently connected and disconnected to/from a certain -signal on certain object instances. -</p> -<p> -A signal emission consists of five stages, unless prematurely stopped: -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><span class="term"></span></p></td> -<td><p> - 1 - Invocation of the object method handler for <a class="link" href="gobject-Signals.html#G-SIGNAL-RUN-FIRST:CAPS"><code class="literal">G_SIGNAL_RUN_FIRST</code></a> signals -</p></td> -</tr> -<tr> -<td><p><span class="term"></span></p></td> -<td><p> - 2 - Invocation of normal user-provided signal handlers (<span class="emphasis"><em>after</em></span> flag <a href="./../glib/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a>) -</p></td> -</tr> -<tr> -<td><p><span class="term"></span></p></td> -<td><p> - 3 - Invocation of the object method handler for <a class="link" href="gobject-Signals.html#G-SIGNAL-RUN-LAST:CAPS"><code class="literal">G_SIGNAL_RUN_LAST</code></a> signals -</p></td> -</tr> -<tr> -<td><p><span class="term"></span></p></td> -<td><p> - 4 - Invocation of user provided signal handlers, connected with an <span class="emphasis"><em>after</em></span> flag of <a href="./../glib/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> -</p></td> -</tr> -<tr> -<td><p><span class="term"></span></p></td> -<td><p> - 5 - Invocation of the object method handler for <a class="link" href="gobject-Signals.html#G-SIGNAL-RUN-CLEANUP:CAPS"><code class="literal">G_SIGNAL_RUN_CLEANUP</code></a> signals -</p></td> -</tr> -</tbody> -</table></div> -<p> -The user-provided signal handlers are called in the order they were -connected in. -All handlers may prematurely stop a signal emission, and any number of -handlers may be connected, disconnected, blocked or unblocked during -a signal emission. -There are certain criteria for skipping user handlers in stages 2 and 4 -of a signal emission. -First, user handlers may be <span class="emphasis"><em>blocked</em></span>, blocked handlers are omitted -during callback invocation, to return from the "blocked" state, a -handler has to get unblocked exactly the same amount of times -it has been blocked before. -Second, upon emission of a <a class="link" href="gobject-Signals.html#G-SIGNAL-DETAILED:CAPS"><code class="literal">G_SIGNAL_DETAILED</code></a> signal, an additional -"detail" argument passed in to <a class="link" href="gobject-Signals.html#g-signal-emit" title="g_signal_emit ()"><code class="function">g_signal_emit()</code></a> has to match the detail -argument of the signal handler currently subject to invocation. -Specification of no detail argument for signal handlers (omission of the -detail part of the signal specification upon connection) serves as a -wildcard and matches any detail argument passed in to emission. -</p> -</div> -<div class="refsect1"> -<a name="gobject-Signals.details"></a><h2>Details</h2> -<div class="refsect2"> -<a name="GSignalInvocationHint"></a><h3>struct GSignalInvocationHint</h3> -<pre class="programlisting">struct GSignalInvocationHint { - guint signal_id; - GQuark detail; - GSignalFlags run_type; -}; -</pre> -<p> -The <a class="link" href="gobject-Signals.html#GSignalInvocationHint" title="struct GSignalInvocationHint"><span class="type">GSignalInvocationHint</span></a> structure is used to pass on additional information -to callbacks during a signal emission. -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><span class="term"><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> <em class="structfield"><code><a name="GSignalInvocationHint.signal-id"></a>signal_id</code></em>;</span></p></td> -<td>The signal id of the signal invoking the callback</td> -</tr> -<tr> -<td><p><span class="term"><a href="./../glib/glib/glib-Quarks.html#GQuark"><span class="type">GQuark</span></a> <em class="structfield"><code><a name="GSignalInvocationHint.detail"></a>detail</code></em>;</span></p></td> -<td>The detail passed on for this emission</td> -</tr> -<tr> -<td><p><span class="term"><a class="link" href="gobject-Signals.html#GSignalFlags" title="enum GSignalFlags"><span class="type">GSignalFlags</span></a> <em class="structfield"><code><a name="GSignalInvocationHint.run-type"></a>run_type</code></em>;</span></p></td> -<td>The stage the signal emission is currently in, this -field will contain one of <a class="link" href="gobject-Signals.html#G-SIGNAL-RUN-FIRST:CAPS"><code class="literal">G_SIGNAL_RUN_FIRST</code></a>, -<a class="link" href="gobject-Signals.html#G-SIGNAL-RUN-LAST:CAPS"><code class="literal">G_SIGNAL_RUN_LAST</code></a> or <a class="link" href="gobject-Signals.html#G-SIGNAL-RUN-CLEANUP:CAPS"><code class="literal">G_SIGNAL_RUN_CLEANUP</code></a>.</td> -</tr> -</tbody> -</table></div> -</div> -<hr> -<div class="refsect2"> -<a name="GSignalAccumulator"></a><h3>GSignalAccumulator ()</h3> -<pre class="programlisting"><a href="./../glib/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> (*GSignalAccumulator) (<em class="parameter"><code><a class="link" href="gobject-Signals.html#GSignalInvocationHint" title="struct GSignalInvocationHint"><span class="type">GSignalInvocationHint</span></a> *ihint</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Generic-values.html#GValue" title="GValue"><span class="type">GValue</span></a> *return_accu</code></em>, - <em class="parameter"><code>const <a class="link" href="gobject-Generic-values.html#GValue" title="GValue"><span class="type">GValue</span></a> *handler_return</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> data</code></em>);</pre> -<p> -The signal accumulator is a special callback function that can be used -to collect return values of the various callbacks that are called -during a signal emission. The signal accumulator is specified at signal -creation time, if it is left <a href="./../glib/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>, no accumulation of callback return -values is performed. The return value of signal emissions is then the -value returned by the last callback. -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><span class="term"><em class="parameter"><code>ihint</code></em> :</span></p></td> -<td>Signal invocation hint, see <a class="link" href="gobject-Signals.html#GSignalInvocationHint" title="struct GSignalInvocationHint"><span class="type">GSignalInvocationHint</span></a>.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>return_accu</code></em> :</span></p></td> -<td>Accumulator to collect callback return values in, this -is the return value of the current signal emission.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>handler_return</code></em> :</span></p></td> -<td>A <a class="link" href="gobject-Generic-values.html#GValue" title="GValue"><span class="type">GValue</span></a> holding the return value of the signal handler.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>data</code></em> :</span></p></td> -<td>Callback data that was specified when creating the signal.</td> -</tr> -<tr> -<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> -<td>The accumulator function returns whether the signal emission -should be aborted. Returning <a href="./../glib/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> means to abort the -current emission and <a href="./../glib/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> is returned for continuation.</td> -</tr> -</tbody> -</table></div> -</div> -<hr> -<div class="refsect2"> -<a name="GSignalCMarshaller"></a><h3>GSignalCMarshaller</h3> -<pre class="programlisting">typedef GClosureMarshal GSignalCMarshaller; -</pre> -<p> -This is the signature of marshaller functions, required to marshall -arrays of parameter values to signal emissions into C language callback -invocations. It is merely an alias to <a class="link" href="gobject-Closures.html#GClosureMarshal" title="GClosureMarshal ()"><span class="type">GClosureMarshal</span></a> since the <a class="link" href="gobject-Closures.html#GClosure" title="struct GClosure"><span class="type">GClosure</span></a> -mechanism takes over responsibility of actual function invocation for the -signal system. -</p> -</div> -<hr> -<div class="refsect2"> -<a name="GSignalCVaMarshaller"></a><h3>GSignalCVaMarshaller</h3> -<pre class="programlisting">typedef GVaClosureMarshal GSignalCVaMarshaller; -</pre> -<p> -This is the signature of va_list marshaller functions, an optional -marshaller that can be used in some situations to avoid -marshalling the signal argument into GValues. -</p> -</div> -<hr> -<div class="refsect2"> -<a name="GSignalEmissionHook"></a><h3>GSignalEmissionHook ()</h3> -<pre class="programlisting"><a href="./../glib/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> (*GSignalEmissionHook) (<em class="parameter"><code><a class="link" href="gobject-Signals.html#GSignalInvocationHint" title="struct GSignalInvocationHint"><span class="type">GSignalInvocationHint</span></a> *ihint</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> n_param_values</code></em>, - <em class="parameter"><code>const <a class="link" href="gobject-Generic-values.html#GValue" title="GValue"><span class="type">GValue</span></a> *param_values</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> data</code></em>);</pre> -<p> -A simple function pointer to get invoked when the signal is emitted. This -allows you to tie a hook to the signal type, so that it will trap all -emissions of that signal, from any object. -</p> -<p> -You may not attach these to signals created with the <a class="link" href="gobject-Signals.html#G-SIGNAL-NO-HOOKS:CAPS"><span class="type">G_SIGNAL_NO_HOOKS</span></a> flag. -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><span class="term"><em class="parameter"><code>ihint</code></em> :</span></p></td> -<td>Signal invocation hint, see <a class="link" href="gobject-Signals.html#GSignalInvocationHint" title="struct GSignalInvocationHint"><span class="type">GSignalInvocationHint</span></a>.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>n_param_values</code></em> :</span></p></td> -<td>the number of parameters to the function, including -the instance on which the signal was emitted.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>param_values</code></em> :</span></p></td> -<td>the instance on which -the signal was emitted, followed by the parameters of the emission. <span class="annotation">[<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> length=n_param_values]</span> -</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>data</code></em> :</span></p></td> -<td>user data associated with the hook.</td> -</tr> -<tr> -<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> -<td>whether it wants to stay connected. If it returns <a href="./../glib/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a>, the signal -hook is disconnected (and destroyed).</td> -</tr> -</tbody> -</table></div> -</div> -<hr> -<div class="refsect2"> -<a name="GSignalFlags"></a><h3>enum GSignalFlags</h3> -<pre class="programlisting">typedef enum { - G_SIGNAL_RUN_FIRST = 1 << 0, - G_SIGNAL_RUN_LAST = 1 << 1, - G_SIGNAL_RUN_CLEANUP = 1 << 2, - G_SIGNAL_NO_RECURSE = 1 << 3, - G_SIGNAL_DETAILED = 1 << 4, - G_SIGNAL_ACTION = 1 << 5, - G_SIGNAL_NO_HOOKS = 1 << 6, - G_SIGNAL_MUST_COLLECT = 1 << 7, - G_SIGNAL_DEPRECATED = 1 << 8 -} GSignalFlags; -</pre> -<p> -The signal flags are used to specify a signal's behaviour, the overall -signal description outlines how especially the RUN flags control the -stages of a signal emission. -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><a name="G-SIGNAL-RUN-FIRST:CAPS"></a><span class="term"><code class="literal">G_SIGNAL_RUN_FIRST</code></span></p></td> -<td>Invoke the object method handler in the first emission stage. -</td> -</tr> -<tr> -<td><p><a name="G-SIGNAL-RUN-LAST:CAPS"></a><span class="term"><code class="literal">G_SIGNAL_RUN_LAST</code></span></p></td> -<td>Invoke the object method handler in the third emission stage. -</td> -</tr> -<tr> -<td><p><a name="G-SIGNAL-RUN-CLEANUP:CAPS"></a><span class="term"><code class="literal">G_SIGNAL_RUN_CLEANUP</code></span></p></td> -<td>Invoke the object method handler in the last emission stage. -</td> -</tr> -<tr> -<td><p><a name="G-SIGNAL-NO-RECURSE:CAPS"></a><span class="term"><code class="literal">G_SIGNAL_NO_RECURSE</code></span></p></td> -<td>Signals being emitted for an object while currently being in - emission for this very object will not be emitted recursively, - but instead cause the first emission to be restarted. -</td> -</tr> -<tr> -<td><p><a name="G-SIGNAL-DETAILED:CAPS"></a><span class="term"><code class="literal">G_SIGNAL_DETAILED</code></span></p></td> -<td>This signal supports "::detail" appendices to the signal name - upon handler connections and emissions. -</td> -</tr> -<tr> -<td><p><a name="G-SIGNAL-ACTION:CAPS"></a><span class="term"><code class="literal">G_SIGNAL_ACTION</code></span></p></td> -<td>Action signals are signals that may freely be emitted on alive - objects from user code via <a class="link" href="gobject-Signals.html#g-signal-emit" title="g_signal_emit ()"><code class="function">g_signal_emit()</code></a> and friends, without - the need of being embedded into extra code that performs pre or - post emission adjustments on the object. They can also be thought - of as object methods which can be called generically by - third-party code. -</td> -</tr> -<tr> -<td><p><a name="G-SIGNAL-NO-HOOKS:CAPS"></a><span class="term"><code class="literal">G_SIGNAL_NO_HOOKS</code></span></p></td> -<td>No emissions hooks are supported for this signal. -</td> -</tr> -<tr> -<td><p><a name="G-SIGNAL-MUST-COLLECT:CAPS"></a><span class="term"><code class="literal">G_SIGNAL_MUST_COLLECT</code></span></p></td> -<td>Varargs signal emission will always collect the - arguments, even if there are no signal handlers connected. Since 2.30. -</td> -</tr> -<tr> -<td><p><a name="G-SIGNAL-DEPRECATED:CAPS"></a><span class="term"><code class="literal">G_SIGNAL_DEPRECATED</code></span></p></td> -<td>The signal is deprecated and will be removed - in a future version. A warning will be generated if it is connected while - running with G_ENABLE_DIAGNOSTIC=1. Since 2.32. -</td> -</tr> -</tbody> -</table></div> -</div> -<hr> -<div class="refsect2"> -<a name="GSignalMatchType"></a><h3>enum GSignalMatchType</h3> -<pre class="programlisting">typedef enum { - G_SIGNAL_MATCH_ID = 1 << 0, - G_SIGNAL_MATCH_DETAIL = 1 << 1, - G_SIGNAL_MATCH_CLOSURE = 1 << 2, - G_SIGNAL_MATCH_FUNC = 1 << 3, - G_SIGNAL_MATCH_DATA = 1 << 4, - G_SIGNAL_MATCH_UNBLOCKED = 1 << 5 -} GSignalMatchType; -</pre> -<p> -The match types specify what <a class="link" href="gobject-Signals.html#g-signal-handlers-block-matched" title="g_signal_handlers_block_matched ()"><code class="function">g_signal_handlers_block_matched()</code></a>, -<a class="link" href="gobject-Signals.html#g-signal-handlers-unblock-matched" title="g_signal_handlers_unblock_matched ()"><code class="function">g_signal_handlers_unblock_matched()</code></a> and <a class="link" href="gobject-Signals.html#g-signal-handlers-disconnect-matched" title="g_signal_handlers_disconnect_matched ()"><code class="function">g_signal_handlers_disconnect_matched()</code></a> -match signals by. -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><a name="G-SIGNAL-MATCH-ID:CAPS"></a><span class="term"><code class="literal">G_SIGNAL_MATCH_ID</code></span></p></td> -<td>The signal id must be equal. -</td> -</tr> -<tr> -<td><p><a name="G-SIGNAL-MATCH-DETAIL:CAPS"></a><span class="term"><code class="literal">G_SIGNAL_MATCH_DETAIL</code></span></p></td> -<td>The signal detail be equal. -</td> -</tr> -<tr> -<td><p><a name="G-SIGNAL-MATCH-CLOSURE:CAPS"></a><span class="term"><code class="literal">G_SIGNAL_MATCH_CLOSURE</code></span></p></td> -<td>The closure must be the same. -</td> -</tr> -<tr> -<td><p><a name="G-SIGNAL-MATCH-FUNC:CAPS"></a><span class="term"><code class="literal">G_SIGNAL_MATCH_FUNC</code></span></p></td> -<td>The C closure callback must be the same. -</td> -</tr> -<tr> -<td><p><a name="G-SIGNAL-MATCH-DATA:CAPS"></a><span class="term"><code class="literal">G_SIGNAL_MATCH_DATA</code></span></p></td> -<td>The closure data must be the same. -</td> -</tr> -<tr> -<td><p><a name="G-SIGNAL-MATCH-UNBLOCKED:CAPS"></a><span class="term"><code class="literal">G_SIGNAL_MATCH_UNBLOCKED</code></span></p></td> -<td>Only unblocked signals may matched. -</td> -</tr> -</tbody> -</table></div> -</div> -<hr> -<div class="refsect2"> -<a name="GSignalQuery"></a><h3>struct GSignalQuery</h3> -<pre class="programlisting">struct GSignalQuery { - guint signal_id; - const gchar *signal_name; - GType itype; - GSignalFlags signal_flags; - GType return_type; /* mangled with G_SIGNAL_TYPE_STATIC_SCOPE flag */ - guint n_params; - const GType *param_types; /* mangled with G_SIGNAL_TYPE_STATIC_SCOPE flag */ -}; -</pre> -<p> -A structure holding in-depth information for a specific signal. It is -filled in by the <a class="link" href="gobject-Signals.html#g-signal-query" title="g_signal_query ()"><code class="function">g_signal_query()</code></a> function. -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><span class="term"><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> <em class="structfield"><code><a name="GSignalQuery.signal-id"></a>signal_id</code></em>;</span></p></td> -<td>The signal id of the signal being queried, or 0 if the -signal to be queried was unknown.</td> -</tr> -<tr> -<td><p><span class="term">const <a href="./../glib/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *<em class="structfield"><code><a name="GSignalQuery.signal-name"></a>signal_name</code></em>;</span></p></td> -<td>The signal name.</td> -</tr> -<tr> -<td><p><span class="term"><a class="link" href="gobject-Type-Information.html#GType" title="GType"><span class="type">GType</span></a> <em class="structfield"><code><a name="GSignalQuery.itype"></a>itype</code></em>;</span></p></td> -<td>The interface/instance type that this signal can be emitted for.</td> -</tr> -<tr> -<td><p><span class="term"><a class="link" href="gobject-Signals.html#GSignalFlags" title="enum GSignalFlags"><span class="type">GSignalFlags</span></a> <em class="structfield"><code><a name="GSignalQuery.signal-flags"></a>signal_flags</code></em>;</span></p></td> -<td>The signal flags as passed in to <a class="link" href="gobject-Signals.html#g-signal-new" title="g_signal_new ()"><code class="function">g_signal_new()</code></a>.</td> -</tr> -<tr> -<td><p><span class="term"><a class="link" href="gobject-Type-Information.html#GType" title="GType"><span class="type">GType</span></a> <em class="structfield"><code><a name="GSignalQuery.return-type"></a>return_type</code></em>;</span></p></td> -<td>The return type for user callbacks.</td> -</tr> -<tr> -<td><p><span class="term"><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> <em class="structfield"><code><a name="GSignalQuery.n-params"></a>n_params</code></em>;</span></p></td> -<td>The number of parameters that user callbacks take.</td> -</tr> -<tr> -<td><p><span class="term">const <a class="link" href="gobject-Type-Information.html#GType" title="GType"><span class="type">GType</span></a> *<em class="structfield"><code><a name="GSignalQuery.param-types"></a>param_types</code></em>;</span></p></td> -<td>The individual parameter types for user callbacks, note that the -effective callback signature is: -<pre class="programlisting"> -@return_type callback (<a href="./../glib/glib/glib-Basic-Types.html#gpointer">gpointer</a> data1, -[param_types param_names,] -gpointer data2); -</pre> -</td> -</tr> -</tbody> -</table></div> -</div> -<hr> -<div class="refsect2"> -<a name="G-SIGNAL-TYPE-STATIC-SCOPE:CAPS"></a><h3>G_SIGNAL_TYPE_STATIC_SCOPE</h3> -<pre class="programlisting">#define G_SIGNAL_TYPE_STATIC_SCOPE (G_TYPE_FLAG_RESERVED_ID_BIT) -</pre> -<p> -This macro flags signal argument types for which the signal system may -assume that instances thereof remain persistent across all signal emissions -they are used in. This is only useful for non ref-counted, value-copy types. -</p> -<p> -To flag a signal argument in this way, add -<code class="literal">| G_SIGNAL_TYPE_STATIC_SCOPE</code> to the corresponding argument -of <a class="link" href="gobject-Signals.html#g-signal-new" title="g_signal_new ()"><code class="function">g_signal_new()</code></a>. -</p> -<div class="informalexample"><pre class="programlisting"> -g_signal_new ("size_request", - G_TYPE_FROM_CLASS (gobject_class), - G_SIGNAL_RUN_FIRST, - G_STRUCT_OFFSET (GtkWidgetClass, size_request), - NULL, NULL, - _gtk_marshal_VOID__BOXED, - G_TYPE_NONE, 1, - GTK_TYPE_REQUISITION | G_SIGNAL_TYPE_STATIC_SCOPE); -</pre></div> -<p> -</p> -</div> -<hr> -<div class="refsect2"> -<a name="G-SIGNAL-MATCH-MASK:CAPS"></a><h3>G_SIGNAL_MATCH_MASK</h3> -<pre class="programlisting">#define G_SIGNAL_MATCH_MASK 0x3f -</pre> -<p> -A mask for all <a class="link" href="gobject-Signals.html#GSignalMatchType" title="enum GSignalMatchType"><span class="type">GSignalMatchType</span></a> bits. -</p> -</div> -<hr> -<div class="refsect2"> -<a name="G-SIGNAL-FLAGS-MASK:CAPS"></a><h3>G_SIGNAL_FLAGS_MASK</h3> -<pre class="programlisting">#define G_SIGNAL_FLAGS_MASK 0x1ff -</pre> -<p> -A mask for all <a class="link" href="gobject-Signals.html#GSignalFlags" title="enum GSignalFlags"><span class="type">GSignalFlags</span></a> bits. -</p> -</div> -<hr> -<div class="refsect2"> -<a name="g-signal-new"></a><h3>g_signal_new ()</h3> -<pre class="programlisting"><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a> g_signal_new (<em class="parameter"><code>const <a href="./../glib/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *signal_name</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Type-Information.html#GType" title="GType"><span class="type">GType</span></a> itype</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Signals.html#GSignalFlags" title="enum GSignalFlags"><span class="type">GSignalFlags</span></a> signal_flags</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> class_offset</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Signals.html#GSignalAccumulator" title="GSignalAccumulator ()"><span class="type">GSignalAccumulator</span></a> accumulator</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> accu_data</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Signals.html#GSignalCMarshaller" title="GSignalCMarshaller"><span class="type">GSignalCMarshaller</span></a> c_marshaller</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Type-Information.html#GType" title="GType"><span class="type">GType</span></a> return_type</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> n_params</code></em>, - <em class="parameter"><code>...</code></em>);</pre> -<p> -Creates a new signal. (This is usually done in the class initializer.) -</p> -<p> -A signal name consists of segments consisting of ASCII letters and -digits, separated by either the '-' or '_' character. The first -character of a signal name must be a letter. Names which violate these -rules lead to undefined behaviour of the GSignal system. -</p> -<p> -When registering a signal and looking up a signal, either separator can -be used, but they cannot be mixed. -</p> -<p> -If 0 is used for <em class="parameter"><code>class_offset</code></em> subclasses cannot override the class handler -in their <code class="code">class_init</code> method by doing -<code class="code">super_class->signal_handler = my_signal_handler</code>. Instead they -will have to use <a class="link" href="gobject-Signals.html#g-signal-override-class-handler" title="g_signal_override_class_handler ()"><code class="function">g_signal_override_class_handler()</code></a>. -</p> -<p> -If c_marshaller is <a href="./../glib/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>, <a class="link" href="gobject-Closures.html#g-cclosure-marshal-generic" title="g_cclosure_marshal_generic ()"><code class="function">g_cclosure_marshal_generic()</code></a> will be used as -the marshaller for this signal. -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><span class="term"><em class="parameter"><code>signal_name</code></em> :</span></p></td> -<td>the name for the signal</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>itype</code></em> :</span></p></td> -<td>the type this signal pertains to. It will also pertain to -types which are derived from this type.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>signal_flags</code></em> :</span></p></td> -<td>a combination of <a class="link" href="gobject-Signals.html#GSignalFlags" title="enum GSignalFlags"><span class="type">GSignalFlags</span></a> specifying detail of when -the default handler is to be invoked. You should at least specify -<a class="link" href="gobject-Signals.html#G-SIGNAL-RUN-FIRST:CAPS"><code class="literal">G_SIGNAL_RUN_FIRST</code></a> or <a class="link" href="gobject-Signals.html#G-SIGNAL-RUN-LAST:CAPS"><code class="literal">G_SIGNAL_RUN_LAST</code></a>.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>class_offset</code></em> :</span></p></td> -<td>The offset of the function pointer in the class structure -for this type. Used to invoke a class method generically. Pass 0 to -not associate a class method slot with this signal.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>accumulator</code></em> :</span></p></td> -<td>the accumulator for this signal; may be <a href="./../glib/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>accu_data</code></em> :</span></p></td> -<td>user data for the <em class="parameter"><code>accumulator</code></em>.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>c_marshaller</code></em> :</span></p></td> -<td>the function to translate arrays of parameter -values to signal emissions into C language callback invocations or <a href="./../glib/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. <span class="annotation">[<acronym title="NULL is ok, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span> -</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>return_type</code></em> :</span></p></td> -<td>the type of return value, or <a class="link" href="gobject-Type-Information.html#G-TYPE-NONE:CAPS" title="G_TYPE_NONE"><span class="type">G_TYPE_NONE</span></a> for a signal -without a return value.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>n_params</code></em> :</span></p></td> -<td>the number of parameter types to follow.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>...</code></em> :</span></p></td> -<td>a list of types, one for each parameter.</td> -</tr> -<tr> -<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> -<td>the signal id</td> -</tr> -</tbody> -</table></div> -</div> -<hr> -<div class="refsect2"> -<a name="g-signal-newv"></a><h3>g_signal_newv ()</h3> -<pre class="programlisting"><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a> g_signal_newv (<em class="parameter"><code>const <a href="./../glib/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *signal_name</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Type-Information.html#GType" title="GType"><span class="type">GType</span></a> itype</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Signals.html#GSignalFlags" title="enum GSignalFlags"><span class="type">GSignalFlags</span></a> signal_flags</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Closures.html#GClosure" title="struct GClosure"><span class="type">GClosure</span></a> *class_closure</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Signals.html#GSignalAccumulator" title="GSignalAccumulator ()"><span class="type">GSignalAccumulator</span></a> accumulator</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> accu_data</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Signals.html#GSignalCMarshaller" title="GSignalCMarshaller"><span class="type">GSignalCMarshaller</span></a> c_marshaller</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Type-Information.html#GType" title="GType"><span class="type">GType</span></a> return_type</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> n_params</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Type-Information.html#GType" title="GType"><span class="type">GType</span></a> *param_types</code></em>);</pre> -<p> -Creates a new signal. (This is usually done in the class initializer.) -</p> -<p> -See <a class="link" href="gobject-Signals.html#g-signal-new" title="g_signal_new ()"><code class="function">g_signal_new()</code></a> for details on allowed signal names. -</p> -<p> -If c_marshaller is <a href="./../glib/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> <em class="parameter"><code>g_cclosure_marshal_generic</code></em> will be used as -the marshaller for this signal. -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><span class="term"><em class="parameter"><code>signal_name</code></em> :</span></p></td> -<td>the name for the signal</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>itype</code></em> :</span></p></td> -<td>the type this signal pertains to. It will also pertain to -types which are derived from this type</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>signal_flags</code></em> :</span></p></td> -<td>a combination of <a class="link" href="gobject-Signals.html#GSignalFlags" title="enum GSignalFlags"><span class="type">GSignalFlags</span></a> specifying detail of when -the default handler is to be invoked. You should at least specify -<a class="link" href="gobject-Signals.html#G-SIGNAL-RUN-FIRST:CAPS"><code class="literal">G_SIGNAL_RUN_FIRST</code></a> or <a class="link" href="gobject-Signals.html#G-SIGNAL-RUN-LAST:CAPS"><code class="literal">G_SIGNAL_RUN_LAST</code></a> -</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>class_closure</code></em> :</span></p></td> -<td>The closure to invoke on signal emission; -may be <a href="./../glib/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. <span class="annotation">[<acronym title="NULL is ok, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span> -</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>accumulator</code></em> :</span></p></td> -<td>the accumulator for this signal; may be <a href="./../glib/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. <span class="annotation">[<acronym title="NULL is ok, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span> -</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>accu_data</code></em> :</span></p></td> -<td>user data for the <em class="parameter"><code>accumulator</code></em> -</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>c_marshaller</code></em> :</span></p></td> -<td>the function to translate arrays of -parameter values to signal emissions into C language callback -invocations or <a href="./../glib/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. <span class="annotation">[<acronym title="NULL is ok, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span> -</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>return_type</code></em> :</span></p></td> -<td>the type of return value, or <a class="link" href="gobject-Type-Information.html#G-TYPE-NONE:CAPS" title="G_TYPE_NONE"><span class="type">G_TYPE_NONE</span></a> for a signal -without a return value</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>n_params</code></em> :</span></p></td> -<td>the length of <em class="parameter"><code>param_types</code></em> -</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>param_types</code></em> :</span></p></td> -<td>an array of types, one for -each parameter. <span class="annotation">[<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> length=n_params]</span> -</td> -</tr> -<tr> -<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> -<td>the signal id</td> -</tr> -</tbody> -</table></div> -</div> -<hr> -<div class="refsect2"> -<a name="g-signal-new-valist"></a><h3>g_signal_new_valist ()</h3> -<pre class="programlisting"><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a> g_signal_new_valist (<em class="parameter"><code>const <a href="./../glib/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *signal_name</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Type-Information.html#GType" title="GType"><span class="type">GType</span></a> itype</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Signals.html#GSignalFlags" title="enum GSignalFlags"><span class="type">GSignalFlags</span></a> signal_flags</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Closures.html#GClosure" title="struct GClosure"><span class="type">GClosure</span></a> *class_closure</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Signals.html#GSignalAccumulator" title="GSignalAccumulator ()"><span class="type">GSignalAccumulator</span></a> accumulator</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> accu_data</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Signals.html#GSignalCMarshaller" title="GSignalCMarshaller"><span class="type">GSignalCMarshaller</span></a> c_marshaller</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Type-Information.html#GType" title="GType"><span class="type">GType</span></a> return_type</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> n_params</code></em>, - <em class="parameter"><code><span class="type">va_list</span> args</code></em>);</pre> -<p> -Creates a new signal. (This is usually done in the class initializer.) -</p> -<p> -See <a class="link" href="gobject-Signals.html#g-signal-new" title="g_signal_new ()"><code class="function">g_signal_new()</code></a> for details on allowed signal names. -</p> -<p> -If c_marshaller is <a href="./../glib/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>, <a class="link" href="gobject-Closures.html#g-cclosure-marshal-generic" title="g_cclosure_marshal_generic ()"><code class="function">g_cclosure_marshal_generic()</code></a> will be used as -the marshaller for this signal. -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><span class="term"><em class="parameter"><code>signal_name</code></em> :</span></p></td> -<td>the name for the signal</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>itype</code></em> :</span></p></td> -<td>the type this signal pertains to. It will also pertain to -types which are derived from this type.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>signal_flags</code></em> :</span></p></td> -<td>a combination of <a class="link" href="gobject-Signals.html#GSignalFlags" title="enum GSignalFlags"><span class="type">GSignalFlags</span></a> specifying detail of when -the default handler is to be invoked. You should at least specify -<a class="link" href="gobject-Signals.html#G-SIGNAL-RUN-FIRST:CAPS"><code class="literal">G_SIGNAL_RUN_FIRST</code></a> or <a class="link" href="gobject-Signals.html#G-SIGNAL-RUN-LAST:CAPS"><code class="literal">G_SIGNAL_RUN_LAST</code></a>.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>class_closure</code></em> :</span></p></td> -<td>The closure to invoke on signal emission; may be <a href="./../glib/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>accumulator</code></em> :</span></p></td> -<td>the accumulator for this signal; may be <a href="./../glib/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>accu_data</code></em> :</span></p></td> -<td>user data for the <em class="parameter"><code>accumulator</code></em>.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>c_marshaller</code></em> :</span></p></td> -<td>the function to translate arrays of parameter -values to signal emissions into C language callback invocations or <a href="./../glib/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. <span class="annotation">[<acronym title="NULL is ok, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span> -</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>return_type</code></em> :</span></p></td> -<td>the type of return value, or <a class="link" href="gobject-Type-Information.html#G-TYPE-NONE:CAPS" title="G_TYPE_NONE"><span class="type">G_TYPE_NONE</span></a> for a signal -without a return value.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>n_params</code></em> :</span></p></td> -<td>the number of parameter types in <em class="parameter"><code>args</code></em>.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>args</code></em> :</span></p></td> -<td>va_list of <a class="link" href="gobject-Type-Information.html#GType" title="GType"><span class="type">GType</span></a>, one for each parameter.</td> -</tr> -<tr> -<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> -<td>the signal id</td> -</tr> -</tbody> -</table></div> -</div> -<hr> -<div class="refsect2"> -<a name="g-signal-set-va-marshaller"></a><h3>g_signal_set_va_marshaller ()</h3> -<pre class="programlisting"><span class="returnvalue">void</span> g_signal_set_va_marshaller (<em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> signal_id</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Type-Information.html#GType" title="GType"><span class="type">GType</span></a> instance_type</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Signals.html#GSignalCVaMarshaller" title="GSignalCVaMarshaller"><span class="type">GSignalCVaMarshaller</span></a> va_marshaller</code></em>);</pre> -</div> -<hr> -<div class="refsect2"> -<a name="g-signal-query"></a><h3>g_signal_query ()</h3> -<pre class="programlisting"><span class="returnvalue">void</span> g_signal_query (<em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> signal_id</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Signals.html#GSignalQuery" title="struct GSignalQuery"><span class="type">GSignalQuery</span></a> *query</code></em>);</pre> -<p> -Queries the signal system for in-depth information about a -specific signal. This function will fill in a user-provided -structure to hold signal-specific information. If an invalid -signal id is passed in, the <em class="parameter"><code>signal_id</code></em> member of the <a class="link" href="gobject-Signals.html#GSignalQuery" title="struct GSignalQuery"><span class="type">GSignalQuery</span></a> -is 0. All members filled into the <a class="link" href="gobject-Signals.html#GSignalQuery" title="struct GSignalQuery"><span class="type">GSignalQuery</span></a> structure should -be considered constant and have to be left untouched. -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><span class="term"><em class="parameter"><code>signal_id</code></em> :</span></p></td> -<td>The signal id of the signal to query information for.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>query</code></em> :</span></p></td> -<td>A user provided structure that is -filled in with constant values upon success. <span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym> caller-allocates]</span> -</td> -</tr> -</tbody> -</table></div> -</div> -<hr> -<div class="refsect2"> -<a name="g-signal-lookup"></a><h3>g_signal_lookup ()</h3> -<pre class="programlisting"><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a> g_signal_lookup (<em class="parameter"><code>const <a href="./../glib/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *name</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Type-Information.html#GType" title="GType"><span class="type">GType</span></a> itype</code></em>);</pre> -<p> -Given the name of the signal and the type of object it connects to, gets -the signal's identifying integer. Emitting the signal by number is -somewhat faster than using the name each time. -</p> -<p> -Also tries the ancestors of the given type. -</p> -<p> -See <a class="link" href="gobject-Signals.html#g-signal-new" title="g_signal_new ()"><code class="function">g_signal_new()</code></a> for details on allowed signal names. -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><span class="term"><em class="parameter"><code>name</code></em> :</span></p></td> -<td>the signal's name.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>itype</code></em> :</span></p></td> -<td>the type that the signal operates on.</td> -</tr> -<tr> -<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> -<td>the signal's identifying number, or 0 if no signal was found.</td> -</tr> -</tbody> -</table></div> -</div> -<hr> -<div class="refsect2"> -<a name="g-signal-name"></a><h3>g_signal_name ()</h3> -<pre class="programlisting">const <a href="./../glib/glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> * g_signal_name (<em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> signal_id</code></em>);</pre> -<p> -Given the signal's identifier, finds its name. -</p> -<p> -Two different signals may have the same name, if they have differing types. -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><span class="term"><em class="parameter"><code>signal_id</code></em> :</span></p></td> -<td>the signal's identifying number.</td> -</tr> -<tr> -<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> -<td>the signal name, or <a href="./../glib/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> if the signal number was invalid.</td> -</tr> -</tbody> -</table></div> -</div> -<hr> -<div class="refsect2"> -<a name="g-signal-list-ids"></a><h3>g_signal_list_ids ()</h3> -<pre class="programlisting"><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a> * g_signal_list_ids (<em class="parameter"><code><a class="link" href="gobject-Type-Information.html#GType" title="GType"><span class="type">GType</span></a> itype</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> *n_ids</code></em>);</pre> -<p> -Lists the signals by id that a certain instance or interface type -created. Further information about the signals can be acquired through -<a class="link" href="gobject-Signals.html#g-signal-query" title="g_signal_query ()"><code class="function">g_signal_query()</code></a>. -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><span class="term"><em class="parameter"><code>itype</code></em> :</span></p></td> -<td>Instance or interface type.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>n_ids</code></em> :</span></p></td> -<td>Location to store the number of signal ids for <em class="parameter"><code>itype</code></em>.</td> -</tr> -<tr> -<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> -<td>Newly allocated array of signal IDs. <span class="annotation">[<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> length=n_ids]</span> -</td> -</tr> -</tbody> -</table></div> -</div> -<hr> -<div class="refsect2"> -<a name="g-signal-emit"></a><h3>g_signal_emit ()</h3> -<pre class="programlisting"><span class="returnvalue">void</span> g_signal_emit (<em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> instance</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> signal_id</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Quarks.html#GQuark"><span class="type">GQuark</span></a> detail</code></em>, - <em class="parameter"><code>...</code></em>);</pre> -<p> -Emits a signal. -</p> -<p> -Note that <a class="link" href="gobject-Signals.html#g-signal-emit" title="g_signal_emit ()"><code class="function">g_signal_emit()</code></a> resets the return value to the default -if no handlers are connected, in contrast to <a class="link" href="gobject-Signals.html#g-signal-emitv" title="g_signal_emitv ()"><code class="function">g_signal_emitv()</code></a>. -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><span class="term"><em class="parameter"><code>instance</code></em> :</span></p></td> -<td>the instance the signal is being emitted on.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>signal_id</code></em> :</span></p></td> -<td>the signal id</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>detail</code></em> :</span></p></td> -<td>the detail</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>...</code></em> :</span></p></td> -<td>parameters to be passed to the signal, followed by a -location for the return value. If the return type of the signal -is <a class="link" href="gobject-Type-Information.html#G-TYPE-NONE:CAPS" title="G_TYPE_NONE"><span class="type">G_TYPE_NONE</span></a>, the return value location can be omitted.</td> -</tr> -</tbody> -</table></div> -</div> -<hr> -<div class="refsect2"> -<a name="g-signal-emit-by-name"></a><h3>g_signal_emit_by_name ()</h3> -<pre class="programlisting"><span class="returnvalue">void</span> g_signal_emit_by_name (<em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> instance</code></em>, - <em class="parameter"><code>const <a href="./../glib/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *detailed_signal</code></em>, - <em class="parameter"><code>...</code></em>);</pre> -<p> -Emits a signal. -</p> -<p> -Note that <a class="link" href="gobject-Signals.html#g-signal-emit-by-name" title="g_signal_emit_by_name ()"><code class="function">g_signal_emit_by_name()</code></a> resets the return value to the default -if no handlers are connected, in contrast to <a class="link" href="gobject-Signals.html#g-signal-emitv" title="g_signal_emitv ()"><code class="function">g_signal_emitv()</code></a>. -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><span class="term"><em class="parameter"><code>instance</code></em> :</span></p></td> -<td>the instance the signal is being emitted on.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>detailed_signal</code></em> :</span></p></td> -<td>a string of the form "signal-name::detail".</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>...</code></em> :</span></p></td> -<td>parameters to be passed to the signal, followed by a -location for the return value. If the return type of the signal -is <a class="link" href="gobject-Type-Information.html#G-TYPE-NONE:CAPS" title="G_TYPE_NONE"><span class="type">G_TYPE_NONE</span></a>, the return value location can be omitted.</td> -</tr> -</tbody> -</table></div> -</div> -<hr> -<div class="refsect2"> -<a name="g-signal-emitv"></a><h3>g_signal_emitv ()</h3> -<pre class="programlisting"><span class="returnvalue">void</span> g_signal_emitv (<em class="parameter"><code>const <a class="link" href="gobject-Generic-values.html#GValue" title="GValue"><span class="type">GValue</span></a> *instance_and_params</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> signal_id</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Quarks.html#GQuark"><span class="type">GQuark</span></a> detail</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Generic-values.html#GValue" title="GValue"><span class="type">GValue</span></a> *return_value</code></em>);</pre> -<p> -Emits a signal. -</p> -<p> -Note that <a class="link" href="gobject-Signals.html#g-signal-emitv" title="g_signal_emitv ()"><code class="function">g_signal_emitv()</code></a> doesn't change <em class="parameter"><code>return_value</code></em> if no handlers are -connected, in contrast to <a class="link" href="gobject-Signals.html#g-signal-emit" title="g_signal_emit ()"><code class="function">g_signal_emit()</code></a> and <a class="link" href="gobject-Signals.html#g-signal-emit-valist" title="g_signal_emit_valist ()"><code class="function">g_signal_emit_valist()</code></a>. -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><span class="term"><em class="parameter"><code>instance_and_params</code></em> :</span></p></td> -<td>argument list for the signal emission. -The first element in the array is a <a class="link" href="gobject-Generic-values.html#GValue" title="GValue"><span class="type">GValue</span></a> for the instance the signal -is being emitted on. The rest are any arguments to be passed to the signal. <span class="annotation">[<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym>]</span> -</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>signal_id</code></em> :</span></p></td> -<td>the signal id</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>detail</code></em> :</span></p></td> -<td>the detail</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>return_value</code></em> :</span></p></td> -<td>Location to store the return value of the signal emission.</td> -</tr> -</tbody> -</table></div> -</div> -<hr> -<div class="refsect2"> -<a name="g-signal-emit-valist"></a><h3>g_signal_emit_valist ()</h3> -<pre class="programlisting"><span class="returnvalue">void</span> g_signal_emit_valist (<em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> instance</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> signal_id</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Quarks.html#GQuark"><span class="type">GQuark</span></a> detail</code></em>, - <em class="parameter"><code><span class="type">va_list</span> var_args</code></em>);</pre> -<p> -Emits a signal. -</p> -<p> -Note that <a class="link" href="gobject-Signals.html#g-signal-emit-valist" title="g_signal_emit_valist ()"><code class="function">g_signal_emit_valist()</code></a> resets the return value to the default -if no handlers are connected, in contrast to <a class="link" href="gobject-Signals.html#g-signal-emitv" title="g_signal_emitv ()"><code class="function">g_signal_emitv()</code></a>. -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><span class="term"><em class="parameter"><code>instance</code></em> :</span></p></td> -<td>the instance the signal is being emitted on.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>signal_id</code></em> :</span></p></td> -<td>the signal id</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>detail</code></em> :</span></p></td> -<td>the detail</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>var_args</code></em> :</span></p></td> -<td>a list of parameters to be passed to the signal, followed by a -location for the return value. If the return type of the signal -is <a class="link" href="gobject-Type-Information.html#G-TYPE-NONE:CAPS" title="G_TYPE_NONE"><span class="type">G_TYPE_NONE</span></a>, the return value location can be omitted.</td> -</tr> -</tbody> -</table></div> -</div> -<hr> -<div class="refsect2"> -<a name="g-signal-connect"></a><h3>g_signal_connect()</h3> -<pre class="programlisting">#define g_signal_connect(instance, detailed_signal, c_handler, data)</pre> -<p> -Connects a <a class="link" href="gobject-Closures.html#GCallback" title="GCallback ()"><span class="type">GCallback</span></a> function to a signal for a particular object. -</p> -<p> -The handler will be called before the default handler of the signal. -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><span class="term"><em class="parameter"><code>instance</code></em> :</span></p></td> -<td>the instance to connect to.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>detailed_signal</code></em> :</span></p></td> -<td>a string of the form "signal-name::detail".</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>c_handler</code></em> :</span></p></td> -<td>the <a class="link" href="gobject-Closures.html#GCallback" title="GCallback ()"><span class="type">GCallback</span></a> to connect.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>data</code></em> :</span></p></td> -<td>data to pass to <em class="parameter"><code>c_handler</code></em> calls.</td> -</tr> -<tr> -<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> -<td>the handler id</td> -</tr> -</tbody> -</table></div> -</div> -<hr> -<div class="refsect2"> -<a name="g-signal-connect-after"></a><h3>g_signal_connect_after()</h3> -<pre class="programlisting">#define g_signal_connect_after(instance, detailed_signal, c_handler, data)</pre> -<p> -Connects a <a class="link" href="gobject-Closures.html#GCallback" title="GCallback ()"><span class="type">GCallback</span></a> function to a signal for a particular object. -</p> -<p> -The handler will be called after the default handler of the signal. -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><span class="term"><em class="parameter"><code>instance</code></em> :</span></p></td> -<td>the instance to connect to.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>detailed_signal</code></em> :</span></p></td> -<td>a string of the form "signal-name::detail".</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>c_handler</code></em> :</span></p></td> -<td>the <a class="link" href="gobject-Closures.html#GCallback" title="GCallback ()"><span class="type">GCallback</span></a> to connect.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>data</code></em> :</span></p></td> -<td>data to pass to <em class="parameter"><code>c_handler</code></em> calls.</td> -</tr> -<tr> -<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> -<td>the handler id</td> -</tr> -</tbody> -</table></div> -</div> -<hr> -<div class="refsect2"> -<a name="g-signal-connect-swapped"></a><h3>g_signal_connect_swapped()</h3> -<pre class="programlisting">#define g_signal_connect_swapped(instance, detailed_signal, c_handler, data)</pre> -<p> -Connects a <a class="link" href="gobject-Closures.html#GCallback" title="GCallback ()"><span class="type">GCallback</span></a> function to a signal for a particular object. -</p> -<p> -The instance on which the signal is emitted and <em class="parameter"><code>data</code></em> will be swapped when -calling the handler. -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><span class="term"><em class="parameter"><code>instance</code></em> :</span></p></td> -<td>the instance to connect to.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>detailed_signal</code></em> :</span></p></td> -<td>a string of the form "signal-name::detail".</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>c_handler</code></em> :</span></p></td> -<td>the <a class="link" href="gobject-Closures.html#GCallback" title="GCallback ()"><span class="type">GCallback</span></a> to connect.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>data</code></em> :</span></p></td> -<td>data to pass to <em class="parameter"><code>c_handler</code></em> calls.</td> -</tr> -<tr> -<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> -<td>the handler id</td> -</tr> -</tbody> -</table></div> -</div> -<hr> -<div class="refsect2"> -<a name="g-signal-connect-object"></a><h3>g_signal_connect_object ()</h3> -<pre class="programlisting"><a href="./../glib/glib/glib-Basic-Types.html#gulong"><span class="returnvalue">gulong</span></a> g_signal_connect_object (<em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> instance</code></em>, - <em class="parameter"><code>const <a href="./../glib/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *detailed_signal</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Closures.html#GCallback" title="GCallback ()"><span class="type">GCallback</span></a> c_handler</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> gobject</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Signals.html#GConnectFlags" title="enum GConnectFlags"><span class="type">GConnectFlags</span></a> connect_flags</code></em>);</pre> -<p> -This is similar to <a class="link" href="gobject-Signals.html#g-signal-connect-data" title="g_signal_connect_data ()"><code class="function">g_signal_connect_data()</code></a>, but uses a closure which -ensures that the <em class="parameter"><code>gobject</code></em> stays alive during the call to <em class="parameter"><code>c_handler</code></em> -by temporarily adding a reference count to <em class="parameter"><code>gobject</code></em>. -</p> -<p> -Note that there is a bug in GObject that makes this function -much less useful than it might seem otherwise. Once <em class="parameter"><code>gobject</code></em> is -disposed, the callback will no longer be called, but, the signal -handler is <span class="emphasis"><em>not</em></span> currently disconnected. If the -<em class="parameter"><code>instance</code></em> is itself being freed at the same time than this doesn't -matter, since the signal will automatically be removed, but -if <em class="parameter"><code>instance</code></em> persists, then the signal handler will leak. You -should not remove the signal yourself because in a future versions of -GObject, the handler <span class="emphasis"><em>will</em></span> automatically -be disconnected. -</p> -<p> -It's possible to work around this problem in a way that will -continue to work with future versions of GObject by checking -that the signal handler is still connected before disconnected it: -</p> -<div class="informalexample"><pre class="programlisting"> - if (g_signal_handler_is_connected (instance, id)) - g_signal_handler_disconnect (instance, id); -</pre></div> -<p> -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><span class="term"><em class="parameter"><code>instance</code></em> :</span></p></td> -<td>the instance to connect to.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>detailed_signal</code></em> :</span></p></td> -<td>a string of the form "signal-name::detail".</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>c_handler</code></em> :</span></p></td> -<td>the <a class="link" href="gobject-Closures.html#GCallback" title="GCallback ()"><span class="type">GCallback</span></a> to connect.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>gobject</code></em> :</span></p></td> -<td>the object to pass as data to <em class="parameter"><code>c_handler</code></em>.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>connect_flags</code></em> :</span></p></td> -<td>a combination of <a class="link" href="gobject-Signals.html#GConnectFlags" title="enum GConnectFlags"><span class="type">GConnectFlags</span></a>.</td> -</tr> -<tr> -<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> -<td>the handler id.</td> -</tr> -</tbody> -</table></div> -</div> -<hr> -<div class="refsect2"> -<a name="GConnectFlags"></a><h3>enum GConnectFlags</h3> -<pre class="programlisting">typedef enum { - G_CONNECT_AFTER = 1 << 0, - G_CONNECT_SWAPPED = 1 << 1 -} GConnectFlags; -</pre> -<p> -The connection flags are used to specify the behaviour of a signal's -connection. -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><a name="G-CONNECT-AFTER:CAPS"></a><span class="term"><code class="literal">G_CONNECT_AFTER</code></span></p></td> -<td>whether the handler should be called before or after the - default handler of the signal. -</td> -</tr> -<tr> -<td><p><a name="G-CONNECT-SWAPPED:CAPS"></a><span class="term"><code class="literal">G_CONNECT_SWAPPED</code></span></p></td> -<td>whether the instance and data should be swapped when - calling the handler. -</td> -</tr> -</tbody> -</table></div> -</div> -<hr> -<div class="refsect2"> -<a name="g-signal-connect-data"></a><h3>g_signal_connect_data ()</h3> -<pre class="programlisting"><a href="./../glib/glib/glib-Basic-Types.html#gulong"><span class="returnvalue">gulong</span></a> g_signal_connect_data (<em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> instance</code></em>, - <em class="parameter"><code>const <a href="./../glib/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *detailed_signal</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Closures.html#GCallback" title="GCallback ()"><span class="type">GCallback</span></a> c_handler</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> data</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Closures.html#GClosureNotify" title="GClosureNotify ()"><span class="type">GClosureNotify</span></a> destroy_data</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Signals.html#GConnectFlags" title="enum GConnectFlags"><span class="type">GConnectFlags</span></a> connect_flags</code></em>);</pre> -<p> -Connects a <a class="link" href="gobject-Closures.html#GCallback" title="GCallback ()"><span class="type">GCallback</span></a> function to a signal for a particular object. Similar -to <a class="link" href="gobject-Signals.html#g-signal-connect" title="g_signal_connect()"><code class="function">g_signal_connect()</code></a>, but allows to provide a <a class="link" href="gobject-Closures.html#GClosureNotify" title="GClosureNotify ()"><span class="type">GClosureNotify</span></a> for the data -which will be called when the signal handler is disconnected and no longer -used. Specify <em class="parameter"><code>connect_flags</code></em> if you need <code class="literal">..._after()</code> or -<code class="literal">..._swapped()</code> variants of this function. -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><span class="term"><em class="parameter"><code>instance</code></em> :</span></p></td> -<td>the instance to connect to.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>detailed_signal</code></em> :</span></p></td> -<td>a string of the form "signal-name::detail".</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>c_handler</code></em> :</span></p></td> -<td>the <a class="link" href="gobject-Closures.html#GCallback" title="GCallback ()"><span class="type">GCallback</span></a> to connect.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>data</code></em> :</span></p></td> -<td>data to pass to <em class="parameter"><code>c_handler</code></em> calls.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>destroy_data</code></em> :</span></p></td> -<td>a <a class="link" href="gobject-Closures.html#GClosureNotify" title="GClosureNotify ()"><span class="type">GClosureNotify</span></a> for <em class="parameter"><code>data</code></em>.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>connect_flags</code></em> :</span></p></td> -<td>a combination of <a class="link" href="gobject-Signals.html#GConnectFlags" title="enum GConnectFlags"><span class="type">GConnectFlags</span></a>.</td> -</tr> -<tr> -<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> -<td>the handler id</td> -</tr> -</tbody> -</table></div> -</div> -<hr> -<div class="refsect2"> -<a name="g-signal-connect-closure"></a><h3>g_signal_connect_closure ()</h3> -<pre class="programlisting"><a href="./../glib/glib/glib-Basic-Types.html#gulong"><span class="returnvalue">gulong</span></a> g_signal_connect_closure (<em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> instance</code></em>, - <em class="parameter"><code>const <a href="./../glib/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *detailed_signal</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Closures.html#GClosure" title="struct GClosure"><span class="type">GClosure</span></a> *closure</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> after</code></em>);</pre> -<p> -Connects a closure to a signal for a particular object. -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><span class="term"><em class="parameter"><code>instance</code></em> :</span></p></td> -<td>the instance to connect to.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>detailed_signal</code></em> :</span></p></td> -<td>a string of the form "signal-name::detail".</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>closure</code></em> :</span></p></td> -<td>the closure to connect.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>after</code></em> :</span></p></td> -<td>whether the handler should be called before or after the -default handler of the signal.</td> -</tr> -<tr> -<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> -<td>the handler id</td> -</tr> -</tbody> -</table></div> -</div> -<hr> -<div class="refsect2"> -<a name="g-signal-connect-closure-by-id"></a><h3>g_signal_connect_closure_by_id ()</h3> -<pre class="programlisting"><a href="./../glib/glib/glib-Basic-Types.html#gulong"><span class="returnvalue">gulong</span></a> g_signal_connect_closure_by_id (<em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> instance</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> signal_id</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Quarks.html#GQuark"><span class="type">GQuark</span></a> detail</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Closures.html#GClosure" title="struct GClosure"><span class="type">GClosure</span></a> *closure</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> after</code></em>);</pre> -<p> -Connects a closure to a signal for a particular object. -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><span class="term"><em class="parameter"><code>instance</code></em> :</span></p></td> -<td>the instance to connect to.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>signal_id</code></em> :</span></p></td> -<td>the id of the signal.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>detail</code></em> :</span></p></td> -<td>the detail.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>closure</code></em> :</span></p></td> -<td>the closure to connect.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>after</code></em> :</span></p></td> -<td>whether the handler should be called before or after the -default handler of the signal.</td> -</tr> -<tr> -<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> -<td>the handler id</td> -</tr> -</tbody> -</table></div> -</div> -<hr> -<div class="refsect2"> -<a name="g-signal-handler-block"></a><h3>g_signal_handler_block ()</h3> -<pre class="programlisting"><span class="returnvalue">void</span> g_signal_handler_block (<em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> instance</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gulong"><span class="type">gulong</span></a> handler_id</code></em>);</pre> -<p> -Blocks a handler of an instance so it will not be called during any -signal emissions unless it is unblocked again. Thus "blocking" a -signal handler means to temporarily deactive it, a signal handler -has to be unblocked exactly the same amount of times it has been -blocked before to become active again. -</p> -<p> -The <em class="parameter"><code>handler_id</code></em> has to be a valid signal handler id, connected to a -signal of <em class="parameter"><code>instance</code></em>. -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><span class="term"><em class="parameter"><code>instance</code></em> :</span></p></td> -<td>The instance to block the signal handler of.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>handler_id</code></em> :</span></p></td> -<td>Handler id of the handler to be blocked.</td> -</tr> -</tbody> -</table></div> -</div> -<hr> -<div class="refsect2"> -<a name="g-signal-handler-unblock"></a><h3>g_signal_handler_unblock ()</h3> -<pre class="programlisting"><span class="returnvalue">void</span> g_signal_handler_unblock (<em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> instance</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gulong"><span class="type">gulong</span></a> handler_id</code></em>);</pre> -<p> -Undoes the effect of a previous <a class="link" href="gobject-Signals.html#g-signal-handler-block" title="g_signal_handler_block ()"><code class="function">g_signal_handler_block()</code></a> call. A -blocked handler is skipped during signal emissions and will not be -invoked, unblocking it (for exactly the amount of times it has been -blocked before) reverts its "blocked" state, so the handler will be -recognized by the signal system and is called upon future or -currently ongoing signal emissions (since the order in which -handlers are called during signal emissions is deterministic, -whether the unblocked handler in question is called as part of a -currently ongoing emission depends on how far that emission has -proceeded yet). -</p> -<p> -The <em class="parameter"><code>handler_id</code></em> has to be a valid id of a signal handler that is -connected to a signal of <em class="parameter"><code>instance</code></em> and is currently blocked. -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><span class="term"><em class="parameter"><code>instance</code></em> :</span></p></td> -<td>The instance to unblock the signal handler of.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>handler_id</code></em> :</span></p></td> -<td>Handler id of the handler to be unblocked.</td> -</tr> -</tbody> -</table></div> -</div> -<hr> -<div class="refsect2"> -<a name="g-signal-handler-disconnect"></a><h3>g_signal_handler_disconnect ()</h3> -<pre class="programlisting"><span class="returnvalue">void</span> g_signal_handler_disconnect (<em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> instance</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gulong"><span class="type">gulong</span></a> handler_id</code></em>);</pre> -<p> -Disconnects a handler from an instance so it will not be called during -any future or currently ongoing emissions of the signal it has been -connected to. The <em class="parameter"><code>handler_id</code></em> becomes invalid and may be reused. -</p> -<p> -The <em class="parameter"><code>handler_id</code></em> has to be a valid signal handler id, connected to a -signal of <em class="parameter"><code>instance</code></em>. -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><span class="term"><em class="parameter"><code>instance</code></em> :</span></p></td> -<td>The instance to remove the signal handler from.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>handler_id</code></em> :</span></p></td> -<td>Handler id of the handler to be disconnected.</td> -</tr> -</tbody> -</table></div> -</div> -<hr> -<div class="refsect2"> -<a name="g-signal-handler-find"></a><h3>g_signal_handler_find ()</h3> -<pre class="programlisting"><a href="./../glib/glib/glib-Basic-Types.html#gulong"><span class="returnvalue">gulong</span></a> g_signal_handler_find (<em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> instance</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Signals.html#GSignalMatchType" title="enum GSignalMatchType"><span class="type">GSignalMatchType</span></a> mask</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> signal_id</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Quarks.html#GQuark"><span class="type">GQuark</span></a> detail</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Closures.html#GClosure" title="struct GClosure"><span class="type">GClosure</span></a> *closure</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> func</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> data</code></em>);</pre> -<p> -Finds the first signal handler that matches certain selection criteria. -The criteria mask is passed as an OR-ed combination of <a class="link" href="gobject-Signals.html#GSignalMatchType" title="enum GSignalMatchType"><span class="type">GSignalMatchType</span></a> -flags, and the criteria values are passed as arguments. -The match <em class="parameter"><code>mask</code></em> has to be non-0 for successful matches. -If no handler was found, 0 is returned. -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><span class="term"><em class="parameter"><code>instance</code></em> :</span></p></td> -<td>The instance owning the signal handler to be found.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>mask</code></em> :</span></p></td> -<td>Mask indicating which of <em class="parameter"><code>signal_id</code></em>, <em class="parameter"><code>detail</code></em>, <em class="parameter"><code>closure</code></em>, <em class="parameter"><code>func</code></em> -and/or <em class="parameter"><code>data</code></em> the handler has to match.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>signal_id</code></em> :</span></p></td> -<td>Signal the handler has to be connected to.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>detail</code></em> :</span></p></td> -<td>Signal detail the handler has to be connected to.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>closure</code></em> :</span></p></td> -<td>The closure the handler will invoke. <span class="annotation">[<acronym title="NULL is ok, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span> -</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>func</code></em> :</span></p></td> -<td>The C closure callback of the handler (useless for non-C closures).</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>data</code></em> :</span></p></td> -<td>The closure data of the handler's closure.</td> -</tr> -<tr> -<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> -<td>A valid non-0 signal handler id for a successful match.</td> -</tr> -</tbody> -</table></div> -</div> -<hr> -<div class="refsect2"> -<a name="g-signal-handlers-block-matched"></a><h3>g_signal_handlers_block_matched ()</h3> -<pre class="programlisting"><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a> g_signal_handlers_block_matched (<em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> instance</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Signals.html#GSignalMatchType" title="enum GSignalMatchType"><span class="type">GSignalMatchType</span></a> mask</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> signal_id</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Quarks.html#GQuark"><span class="type">GQuark</span></a> detail</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Closures.html#GClosure" title="struct GClosure"><span class="type">GClosure</span></a> *closure</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> func</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> data</code></em>);</pre> -<p> -Blocks all handlers on an instance that match a certain selection criteria. -The criteria mask is passed as an OR-ed combination of <a class="link" href="gobject-Signals.html#GSignalMatchType" title="enum GSignalMatchType"><span class="type">GSignalMatchType</span></a> -flags, and the criteria values are passed as arguments. -Passing at least one of the <a class="link" href="gobject-Signals.html#G-SIGNAL-MATCH-CLOSURE:CAPS"><code class="literal">G_SIGNAL_MATCH_CLOSURE</code></a>, <a class="link" href="gobject-Signals.html#G-SIGNAL-MATCH-FUNC:CAPS"><code class="literal">G_SIGNAL_MATCH_FUNC</code></a> -or <a class="link" href="gobject-Signals.html#G-SIGNAL-MATCH-DATA:CAPS"><code class="literal">G_SIGNAL_MATCH_DATA</code></a> match flags is required for successful matches. -If no handlers were found, 0 is returned, the number of blocked handlers -otherwise. -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><span class="term"><em class="parameter"><code>instance</code></em> :</span></p></td> -<td>The instance to block handlers from.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>mask</code></em> :</span></p></td> -<td>Mask indicating which of <em class="parameter"><code>signal_id</code></em>, <em class="parameter"><code>detail</code></em>, <em class="parameter"><code>closure</code></em>, <em class="parameter"><code>func</code></em> -and/or <em class="parameter"><code>data</code></em> the handlers have to match.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>signal_id</code></em> :</span></p></td> -<td>Signal the handlers have to be connected to.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>detail</code></em> :</span></p></td> -<td>Signal detail the handlers have to be connected to.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>closure</code></em> :</span></p></td> -<td>The closure the handlers will invoke. <span class="annotation">[<acronym title="NULL is ok, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span> -</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>func</code></em> :</span></p></td> -<td>The C closure callback of the handlers (useless for non-C closures).</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>data</code></em> :</span></p></td> -<td>The closure data of the handlers' closures.</td> -</tr> -<tr> -<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> -<td>The number of handlers that matched.</td> -</tr> -</tbody> -</table></div> -</div> -<hr> -<div class="refsect2"> -<a name="g-signal-handlers-unblock-matched"></a><h3>g_signal_handlers_unblock_matched ()</h3> -<pre class="programlisting"><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a> g_signal_handlers_unblock_matched (<em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> instance</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Signals.html#GSignalMatchType" title="enum GSignalMatchType"><span class="type">GSignalMatchType</span></a> mask</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> signal_id</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Quarks.html#GQuark"><span class="type">GQuark</span></a> detail</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Closures.html#GClosure" title="struct GClosure"><span class="type">GClosure</span></a> *closure</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> func</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> data</code></em>);</pre> -<p> -Unblocks all handlers on an instance that match a certain selection -criteria. The criteria mask is passed as an OR-ed combination of -<a class="link" href="gobject-Signals.html#GSignalMatchType" title="enum GSignalMatchType"><span class="type">GSignalMatchType</span></a> flags, and the criteria values are passed as arguments. -Passing at least one of the <a class="link" href="gobject-Signals.html#G-SIGNAL-MATCH-CLOSURE:CAPS"><code class="literal">G_SIGNAL_MATCH_CLOSURE</code></a>, <a class="link" href="gobject-Signals.html#G-SIGNAL-MATCH-FUNC:CAPS"><code class="literal">G_SIGNAL_MATCH_FUNC</code></a> -or <a class="link" href="gobject-Signals.html#G-SIGNAL-MATCH-DATA:CAPS"><code class="literal">G_SIGNAL_MATCH_DATA</code></a> match flags is required for successful matches. -If no handlers were found, 0 is returned, the number of unblocked handlers -otherwise. The match criteria should not apply to any handlers that are -not currently blocked. -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><span class="term"><em class="parameter"><code>instance</code></em> :</span></p></td> -<td>The instance to unblock handlers from.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>mask</code></em> :</span></p></td> -<td>Mask indicating which of <em class="parameter"><code>signal_id</code></em>, <em class="parameter"><code>detail</code></em>, <em class="parameter"><code>closure</code></em>, <em class="parameter"><code>func</code></em> -and/or <em class="parameter"><code>data</code></em> the handlers have to match.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>signal_id</code></em> :</span></p></td> -<td>Signal the handlers have to be connected to.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>detail</code></em> :</span></p></td> -<td>Signal detail the handlers have to be connected to.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>closure</code></em> :</span></p></td> -<td>The closure the handlers will invoke. <span class="annotation">[<acronym title="NULL is ok, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span> -</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>func</code></em> :</span></p></td> -<td>The C closure callback of the handlers (useless for non-C closures).</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>data</code></em> :</span></p></td> -<td>The closure data of the handlers' closures.</td> -</tr> -<tr> -<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> -<td>The number of handlers that matched.</td> -</tr> -</tbody> -</table></div> -</div> -<hr> -<div class="refsect2"> -<a name="g-signal-handlers-disconnect-matched"></a><h3>g_signal_handlers_disconnect_matched ()</h3> -<pre class="programlisting"><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a> g_signal_handlers_disconnect_matched - (<em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> instance</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Signals.html#GSignalMatchType" title="enum GSignalMatchType"><span class="type">GSignalMatchType</span></a> mask</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> signal_id</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Quarks.html#GQuark"><span class="type">GQuark</span></a> detail</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Closures.html#GClosure" title="struct GClosure"><span class="type">GClosure</span></a> *closure</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> func</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> data</code></em>);</pre> -<p> -Disconnects all handlers on an instance that match a certain -selection criteria. The criteria mask is passed as an OR-ed -combination of <a class="link" href="gobject-Signals.html#GSignalMatchType" title="enum GSignalMatchType"><span class="type">GSignalMatchType</span></a> flags, and the criteria values are -passed as arguments. Passing at least one of the -<a class="link" href="gobject-Signals.html#G-SIGNAL-MATCH-CLOSURE:CAPS"><code class="literal">G_SIGNAL_MATCH_CLOSURE</code></a>, <a class="link" href="gobject-Signals.html#G-SIGNAL-MATCH-FUNC:CAPS"><code class="literal">G_SIGNAL_MATCH_FUNC</code></a> or -<a class="link" href="gobject-Signals.html#G-SIGNAL-MATCH-DATA:CAPS"><code class="literal">G_SIGNAL_MATCH_DATA</code></a> match flags is required for successful -matches. If no handlers were found, 0 is returned, the number of -disconnected handlers otherwise. -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><span class="term"><em class="parameter"><code>instance</code></em> :</span></p></td> -<td>The instance to remove handlers from.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>mask</code></em> :</span></p></td> -<td>Mask indicating which of <em class="parameter"><code>signal_id</code></em>, <em class="parameter"><code>detail</code></em>, <em class="parameter"><code>closure</code></em>, <em class="parameter"><code>func</code></em> -and/or <em class="parameter"><code>data</code></em> the handlers have to match.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>signal_id</code></em> :</span></p></td> -<td>Signal the handlers have to be connected to.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>detail</code></em> :</span></p></td> -<td>Signal detail the handlers have to be connected to.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>closure</code></em> :</span></p></td> -<td>The closure the handlers will invoke. <span class="annotation">[<acronym title="NULL is ok, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span> -</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>func</code></em> :</span></p></td> -<td>The C closure callback of the handlers (useless for non-C closures).</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>data</code></em> :</span></p></td> -<td>The closure data of the handlers' closures.</td> -</tr> -<tr> -<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> -<td>The number of handlers that matched.</td> -</tr> -</tbody> -</table></div> -</div> -<hr> -<div class="refsect2"> -<a name="g-signal-handler-is-connected"></a><h3>g_signal_handler_is_connected ()</h3> -<pre class="programlisting"><a href="./../glib/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> g_signal_handler_is_connected (<em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> instance</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gulong"><span class="type">gulong</span></a> handler_id</code></em>);</pre> -<p> -Returns whether <em class="parameter"><code>handler_id</code></em> is the id of a handler connected to <em class="parameter"><code>instance</code></em>. -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><span class="term"><em class="parameter"><code>instance</code></em> :</span></p></td> -<td>The instance where a signal handler is sought.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>handler_id</code></em> :</span></p></td> -<td>the handler id.</td> -</tr> -<tr> -<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> -<td>whether <em class="parameter"><code>handler_id</code></em> identifies a handler connected to <em class="parameter"><code>instance</code></em>.</td> -</tr> -</tbody> -</table></div> -</div> -<hr> -<div class="refsect2"> -<a name="g-signal-handlers-block-by-func"></a><h3>g_signal_handlers_block_by_func()</h3> -<pre class="programlisting">#define g_signal_handlers_block_by_func(instance, func, data)</pre> -<p> -Blocks all handlers on an instance that match <em class="parameter"><code>func</code></em> and <em class="parameter"><code>data</code></em>. -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><span class="term"><em class="parameter"><code>instance</code></em> :</span></p></td> -<td>The instance to block handlers from.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>func</code></em> :</span></p></td> -<td>The C closure callback of the handlers (useless for non-C closures).</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>data</code></em> :</span></p></td> -<td>The closure data of the handlers' closures.</td> -</tr> -<tr> -<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> -<td>The number of handlers that matched.</td> -</tr> -</tbody> -</table></div> -</div> -<hr> -<div class="refsect2"> -<a name="g-signal-handlers-unblock-by-func"></a><h3>g_signal_handlers_unblock_by_func()</h3> -<pre class="programlisting">#define g_signal_handlers_unblock_by_func(instance, func, data)</pre> -<p> -Unblocks all handlers on an instance that match <em class="parameter"><code>func</code></em> and <em class="parameter"><code>data</code></em>. -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><span class="term"><em class="parameter"><code>instance</code></em> :</span></p></td> -<td>The instance to unblock handlers from.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>func</code></em> :</span></p></td> -<td>The C closure callback of the handlers (useless for non-C closures).</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>data</code></em> :</span></p></td> -<td>The closure data of the handlers' closures.</td> -</tr> -<tr> -<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> -<td>The number of handlers that matched.</td> -</tr> -</tbody> -</table></div> -</div> -<hr> -<div class="refsect2"> -<a name="g-signal-handlers-disconnect-by-func"></a><h3>g_signal_handlers_disconnect_by_func()</h3> -<pre class="programlisting">#define g_signal_handlers_disconnect_by_func(instance, func, data)</pre> -<p> -Disconnects all handlers on an instance that match <em class="parameter"><code>func</code></em> and <em class="parameter"><code>data</code></em>. -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><span class="term"><em class="parameter"><code>instance</code></em> :</span></p></td> -<td>The instance to remove handlers from.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>func</code></em> :</span></p></td> -<td>The C closure callback of the handlers (useless for non-C closures).</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>data</code></em> :</span></p></td> -<td>The closure data of the handlers' closures.</td> -</tr> -<tr> -<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> -<td>The number of handlers that matched.</td> -</tr> -</tbody> -</table></div> -</div> -<hr> -<div class="refsect2"> -<a name="g-signal-handlers-disconnect-by-data"></a><h3>g_signal_handlers_disconnect_by_data()</h3> -<pre class="programlisting">#define g_signal_handlers_disconnect_by_data(instance, data)</pre> -<p> -Disconnects all handlers on an instance that match <em class="parameter"><code>data</code></em>. -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><span class="term"><em class="parameter"><code>instance</code></em> :</span></p></td> -<td>The instance to remove handlers from</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>data</code></em> :</span></p></td> -<td>the closure data of the handlers' closures</td> -</tr> -<tr> -<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> -<td>The number of handlers that matched.</td> -</tr> -</tbody> -</table></div> -<p class="since">Since 2.32</p> -</div> -<hr> -<div class="refsect2"> -<a name="g-signal-has-handler-pending"></a><h3>g_signal_has_handler_pending ()</h3> -<pre class="programlisting"><a href="./../glib/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> g_signal_has_handler_pending (<em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> instance</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> signal_id</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Quarks.html#GQuark"><span class="type">GQuark</span></a> detail</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> may_be_blocked</code></em>);</pre> -<p> -Returns whether there are any handlers connected to <em class="parameter"><code>instance</code></em> for the -given signal id and detail. -</p> -<p> -One example of when you might use this is when the arguments to the -signal are difficult to compute. A class implementor may opt to not -emit the signal if no one is attached anyway, thus saving the cost -of building the arguments. -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><span class="term"><em class="parameter"><code>instance</code></em> :</span></p></td> -<td>the object whose signal handlers are sought.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>signal_id</code></em> :</span></p></td> -<td>the signal id.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>detail</code></em> :</span></p></td> -<td>the detail.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>may_be_blocked</code></em> :</span></p></td> -<td>whether blocked handlers should count as match.</td> -</tr> -<tr> -<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> -<td> -<a href="./../glib/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if a handler is connected to the signal, <a href="./../glib/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> -otherwise.</td> -</tr> -</tbody> -</table></div> -</div> -<hr> -<div class="refsect2"> -<a name="g-signal-stop-emission"></a><h3>g_signal_stop_emission ()</h3> -<pre class="programlisting"><span class="returnvalue">void</span> g_signal_stop_emission (<em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> instance</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> signal_id</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Quarks.html#GQuark"><span class="type">GQuark</span></a> detail</code></em>);</pre> -<p> -Stops a signal's current emission. -</p> -<p> -This will prevent the default method from running, if the signal was -<a class="link" href="gobject-Signals.html#G-SIGNAL-RUN-LAST:CAPS"><code class="literal">G_SIGNAL_RUN_LAST</code></a> and you connected normally (i.e. without the "after" -flag). -</p> -<p> -Prints a warning if used on a signal which isn't being emitted. -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><span class="term"><em class="parameter"><code>instance</code></em> :</span></p></td> -<td>the object whose signal handlers you wish to stop.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>signal_id</code></em> :</span></p></td> -<td>the signal identifier, as returned by <a class="link" href="gobject-Signals.html#g-signal-lookup" title="g_signal_lookup ()"><code class="function">g_signal_lookup()</code></a>.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>detail</code></em> :</span></p></td> -<td>the detail which the signal was emitted with.</td> -</tr> -</tbody> -</table></div> -</div> -<hr> -<div class="refsect2"> -<a name="g-signal-stop-emission-by-name"></a><h3>g_signal_stop_emission_by_name ()</h3> -<pre class="programlisting"><span class="returnvalue">void</span> g_signal_stop_emission_by_name (<em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> instance</code></em>, - <em class="parameter"><code>const <a href="./../glib/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *detailed_signal</code></em>);</pre> -<p> -Stops a signal's current emission. -</p> -<p> -This is just like <a class="link" href="gobject-Signals.html#g-signal-stop-emission" title="g_signal_stop_emission ()"><code class="function">g_signal_stop_emission()</code></a> except it will look up the -signal id for you. -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><span class="term"><em class="parameter"><code>instance</code></em> :</span></p></td> -<td>the object whose signal handlers you wish to stop.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>detailed_signal</code></em> :</span></p></td> -<td>a string of the form "signal-name::detail".</td> -</tr> -</tbody> -</table></div> -</div> -<hr> -<div class="refsect2"> -<a name="g-signal-override-class-closure"></a><h3>g_signal_override_class_closure ()</h3> -<pre class="programlisting"><span class="returnvalue">void</span> g_signal_override_class_closure (<em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> signal_id</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Type-Information.html#GType" title="GType"><span class="type">GType</span></a> instance_type</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Closures.html#GClosure" title="struct GClosure"><span class="type">GClosure</span></a> *class_closure</code></em>);</pre> -<p> -Overrides the class closure (i.e. the default handler) for the given signal -for emissions on instances of <em class="parameter"><code>instance_type</code></em>. <em class="parameter"><code>instance_type</code></em> must be derived -from the type to which the signal belongs. -</p> -<p> -See <a class="link" href="gobject-Signals.html#g-signal-chain-from-overridden" title="g_signal_chain_from_overridden ()"><code class="function">g_signal_chain_from_overridden()</code></a> and -<a class="link" href="gobject-Signals.html#g-signal-chain-from-overridden-handler" title="g_signal_chain_from_overridden_handler ()"><code class="function">g_signal_chain_from_overridden_handler()</code></a> for how to chain up to the -parent class closure from inside the overridden one. -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><span class="term"><em class="parameter"><code>signal_id</code></em> :</span></p></td> -<td>the signal id</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>instance_type</code></em> :</span></p></td> -<td>the instance type on which to override the class closure -for the signal.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>class_closure</code></em> :</span></p></td> -<td>the closure.</td> -</tr> -</tbody> -</table></div> -</div> -<hr> -<div class="refsect2"> -<a name="g-signal-chain-from-overridden"></a><h3>g_signal_chain_from_overridden ()</h3> -<pre class="programlisting"><span class="returnvalue">void</span> g_signal_chain_from_overridden (<em class="parameter"><code>const <a class="link" href="gobject-Generic-values.html#GValue" title="GValue"><span class="type">GValue</span></a> *instance_and_params</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Generic-values.html#GValue" title="GValue"><span class="type">GValue</span></a> *return_value</code></em>);</pre> -<p> -Calls the original class closure of a signal. This function should only -be called from an overridden class closure; see -<a class="link" href="gobject-Signals.html#g-signal-override-class-closure" title="g_signal_override_class_closure ()"><code class="function">g_signal_override_class_closure()</code></a> and -<a class="link" href="gobject-Signals.html#g-signal-override-class-handler" title="g_signal_override_class_handler ()"><code class="function">g_signal_override_class_handler()</code></a>. -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><span class="term"><em class="parameter"><code>instance_and_params</code></em> :</span></p></td> -<td>(array) the argument list of the signal emission. -The first element in the array is a <a class="link" href="gobject-Generic-values.html#GValue" title="GValue"><span class="type">GValue</span></a> for the instance the signal -is being emitted on. The rest are any arguments to be passed to the signal.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>return_value</code></em> :</span></p></td> -<td>Location for the return value.</td> -</tr> -</tbody> -</table></div> -</div> -<hr> -<div class="refsect2"> -<a name="g-signal-new-class-handler"></a><h3>g_signal_new_class_handler ()</h3> -<pre class="programlisting"><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a> g_signal_new_class_handler (<em class="parameter"><code>const <a href="./../glib/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *signal_name</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Type-Information.html#GType" title="GType"><span class="type">GType</span></a> itype</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Signals.html#GSignalFlags" title="enum GSignalFlags"><span class="type">GSignalFlags</span></a> signal_flags</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Closures.html#GCallback" title="GCallback ()"><span class="type">GCallback</span></a> class_handler</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Signals.html#GSignalAccumulator" title="GSignalAccumulator ()"><span class="type">GSignalAccumulator</span></a> accumulator</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> accu_data</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Signals.html#GSignalCMarshaller" title="GSignalCMarshaller"><span class="type">GSignalCMarshaller</span></a> c_marshaller</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Type-Information.html#GType" title="GType"><span class="type">GType</span></a> return_type</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> n_params</code></em>, - <em class="parameter"><code>...</code></em>);</pre> -<p> -Creates a new signal. (This is usually done in the class initializer.) -</p> -<p> -This is a variant of <a class="link" href="gobject-Signals.html#g-signal-new" title="g_signal_new ()"><code class="function">g_signal_new()</code></a> that takes a C callback instead -off a class offset for the signal's class handler. This function -doesn't need a function pointer exposed in the class structure of -an object definition, instead the function pointer is passed -directly and can be overriden by derived classes with -<a class="link" href="gobject-Signals.html#g-signal-override-class-closure" title="g_signal_override_class_closure ()"><code class="function">g_signal_override_class_closure()</code></a> or -<a class="link" href="gobject-Signals.html#g-signal-override-class-handler" title="g_signal_override_class_handler ()"><code class="function">g_signal_override_class_handler()</code></a>and chained to with -<a class="link" href="gobject-Signals.html#g-signal-chain-from-overridden" title="g_signal_chain_from_overridden ()"><code class="function">g_signal_chain_from_overridden()</code></a> or -<a class="link" href="gobject-Signals.html#g-signal-chain-from-overridden-handler" title="g_signal_chain_from_overridden_handler ()"><code class="function">g_signal_chain_from_overridden_handler()</code></a>. -</p> -<p> -See <a class="link" href="gobject-Signals.html#g-signal-new" title="g_signal_new ()"><code class="function">g_signal_new()</code></a> for information about signal names. -</p> -<p> -If c_marshaller is <a href="./../glib/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> <em class="parameter"><code>g_cclosure_marshal_generic</code></em> will be used as -the marshaller for this signal. -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><span class="term"><em class="parameter"><code>signal_name</code></em> :</span></p></td> -<td>the name for the signal</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>itype</code></em> :</span></p></td> -<td>the type this signal pertains to. It will also pertain to -types which are derived from this type.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>signal_flags</code></em> :</span></p></td> -<td>a combination of <a class="link" href="gobject-Signals.html#GSignalFlags" title="enum GSignalFlags"><span class="type">GSignalFlags</span></a> specifying detail of when -the default handler is to be invoked. You should at least specify -<a class="link" href="gobject-Signals.html#G-SIGNAL-RUN-FIRST:CAPS"><code class="literal">G_SIGNAL_RUN_FIRST</code></a> or <a class="link" href="gobject-Signals.html#G-SIGNAL-RUN-LAST:CAPS"><code class="literal">G_SIGNAL_RUN_LAST</code></a>.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>class_handler</code></em> :</span></p></td> -<td>a <a class="link" href="gobject-Closures.html#GCallback" title="GCallback ()"><span class="type">GCallback</span></a> which acts as class implementation of -this signal. Used to invoke a class method generically. Pass <a href="./../glib/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> to -not associate a class method with this signal.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>accumulator</code></em> :</span></p></td> -<td>the accumulator for this signal; may be <a href="./../glib/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>accu_data</code></em> :</span></p></td> -<td>user data for the <em class="parameter"><code>accumulator</code></em>.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>c_marshaller</code></em> :</span></p></td> -<td>the function to translate arrays of parameter -values to signal emissions into C language callback invocations or <a href="./../glib/glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>. <span class="annotation">[<acronym title="NULL is ok, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span> -</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>return_type</code></em> :</span></p></td> -<td>the type of return value, or <a class="link" href="gobject-Type-Information.html#G-TYPE-NONE:CAPS" title="G_TYPE_NONE"><span class="type">G_TYPE_NONE</span></a> for a signal -without a return value.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>n_params</code></em> :</span></p></td> -<td>the number of parameter types to follow.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>...</code></em> :</span></p></td> -<td>a list of types, one for each parameter.</td> -</tr> -<tr> -<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> -<td>the signal id</td> -</tr> -</tbody> -</table></div> -<p class="since">Since 2.18</p> -</div> -<hr> -<div class="refsect2"> -<a name="g-signal-override-class-handler"></a><h3>g_signal_override_class_handler ()</h3> -<pre class="programlisting"><span class="returnvalue">void</span> g_signal_override_class_handler (<em class="parameter"><code>const <a href="./../glib/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *signal_name</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Type-Information.html#GType" title="GType"><span class="type">GType</span></a> instance_type</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Closures.html#GCallback" title="GCallback ()"><span class="type">GCallback</span></a> class_handler</code></em>);</pre> -<p> -Overrides the class closure (i.e. the default handler) for the -given signal for emissions on instances of <em class="parameter"><code>instance_type</code></em> with -callabck <em class="parameter"><code>class_handler</code></em>. <em class="parameter"><code>instance_type</code></em> must be derived from the -type to which the signal belongs. -</p> -<p> -See <a class="link" href="gobject-Signals.html#g-signal-chain-from-overridden" title="g_signal_chain_from_overridden ()"><code class="function">g_signal_chain_from_overridden()</code></a> and -<a class="link" href="gobject-Signals.html#g-signal-chain-from-overridden-handler" title="g_signal_chain_from_overridden_handler ()"><code class="function">g_signal_chain_from_overridden_handler()</code></a> for how to chain up to the -parent class closure from inside the overridden one. -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><span class="term"><em class="parameter"><code>signal_name</code></em> :</span></p></td> -<td>the name for the signal</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>instance_type</code></em> :</span></p></td> -<td>the instance type on which to override the class handler -for the signal.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>class_handler</code></em> :</span></p></td> -<td>the handler.</td> -</tr> -</tbody> -</table></div> -<p class="since">Since 2.18</p> -</div> -<hr> -<div class="refsect2"> -<a name="g-signal-chain-from-overridden-handler"></a><h3>g_signal_chain_from_overridden_handler ()</h3> -<pre class="programlisting"><span class="returnvalue">void</span> g_signal_chain_from_overridden_handler - (<em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> instance</code></em>, - <em class="parameter"><code>...</code></em>);</pre> -<p> -Calls the original class closure of a signal. This function should -only be called from an overridden class closure; see -<a class="link" href="gobject-Signals.html#g-signal-override-class-closure" title="g_signal_override_class_closure ()"><code class="function">g_signal_override_class_closure()</code></a> and -<a class="link" href="gobject-Signals.html#g-signal-override-class-handler" title="g_signal_override_class_handler ()"><code class="function">g_signal_override_class_handler()</code></a>. -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><span class="term"><em class="parameter"><code>instance</code></em> :</span></p></td> -<td>the instance the signal is being emitted on.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>...</code></em> :</span></p></td> -<td>parameters to be passed to the parent class closure, followed by a -location for the return value. If the return type of the signal -is <a class="link" href="gobject-Type-Information.html#G-TYPE-NONE:CAPS" title="G_TYPE_NONE"><span class="type">G_TYPE_NONE</span></a>, the return value location can be omitted.</td> -</tr> -</tbody> -</table></div> -<p class="since">Since 2.18</p> -</div> -<hr> -<div class="refsect2"> -<a name="g-signal-add-emission-hook"></a><h3>g_signal_add_emission_hook ()</h3> -<pre class="programlisting"><a href="./../glib/glib/glib-Basic-Types.html#gulong"><span class="returnvalue">gulong</span></a> g_signal_add_emission_hook (<em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> signal_id</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Quarks.html#GQuark"><span class="type">GQuark</span></a> detail</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Signals.html#GSignalEmissionHook" title="GSignalEmissionHook ()"><span class="type">GSignalEmissionHook</span></a> hook_func</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> hook_data</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Datasets.html#GDestroyNotify"><span class="type">GDestroyNotify</span></a> data_destroy</code></em>);</pre> -<p> -Adds an emission hook for a signal, which will get called for any emission -of that signal, independent of the instance. This is possible only -for signals which don't have <a class="link" href="gobject-Signals.html#G-SIGNAL-NO-HOOKS:CAPS"><span class="type">G_SIGNAL_NO_HOOKS</span></a> flag set. -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><span class="term"><em class="parameter"><code>signal_id</code></em> :</span></p></td> -<td>the signal identifier, as returned by <a class="link" href="gobject-Signals.html#g-signal-lookup" title="g_signal_lookup ()"><code class="function">g_signal_lookup()</code></a>.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>detail</code></em> :</span></p></td> -<td>the detail on which to call the hook.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>hook_func</code></em> :</span></p></td> -<td>a <a class="link" href="gobject-Signals.html#GSignalEmissionHook" title="GSignalEmissionHook ()"><span class="type">GSignalEmissionHook</span></a> function.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>hook_data</code></em> :</span></p></td> -<td>user data for <em class="parameter"><code>hook_func</code></em>.</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>data_destroy</code></em> :</span></p></td> -<td>a <a href="./../glib/glib/glib-Datasets.html#GDestroyNotify"><span class="type">GDestroyNotify</span></a> for <em class="parameter"><code>hook_data</code></em>.</td> -</tr> -<tr> -<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> -<td>the hook id, for later use with <a class="link" href="gobject-Signals.html#g-signal-remove-emission-hook" title="g_signal_remove_emission_hook ()"><code class="function">g_signal_remove_emission_hook()</code></a>.</td> -</tr> -</tbody> -</table></div> -</div> -<hr> -<div class="refsect2"> -<a name="g-signal-remove-emission-hook"></a><h3>g_signal_remove_emission_hook ()</h3> -<pre class="programlisting"><span class="returnvalue">void</span> g_signal_remove_emission_hook (<em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> signal_id</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gulong"><span class="type">gulong</span></a> hook_id</code></em>);</pre> -<p> -Deletes an emission hook. -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><span class="term"><em class="parameter"><code>signal_id</code></em> :</span></p></td> -<td>the id of the signal</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>hook_id</code></em> :</span></p></td> -<td>the id of the emission hook, as returned by -<a class="link" href="gobject-Signals.html#g-signal-add-emission-hook" title="g_signal_add_emission_hook ()"><code class="function">g_signal_add_emission_hook()</code></a> -</td> -</tr> -</tbody> -</table></div> -</div> -<hr> -<div class="refsect2"> -<a name="g-signal-parse-name"></a><h3>g_signal_parse_name ()</h3> -<pre class="programlisting"><a href="./../glib/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> g_signal_parse_name (<em class="parameter"><code>const <a href="./../glib/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *detailed_signal</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Type-Information.html#GType" title="GType"><span class="type">GType</span></a> itype</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> *signal_id_p</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Quarks.html#GQuark"><span class="type">GQuark</span></a> *detail_p</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> force_detail_quark</code></em>);</pre> -<p> -Internal function to parse a signal name into its <em class="parameter"><code>signal_id</code></em> -and <em class="parameter"><code>detail</code></em> quark. -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><span class="term"><em class="parameter"><code>detailed_signal</code></em> :</span></p></td> -<td>a string of the form "signal-name::detail".</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>itype</code></em> :</span></p></td> -<td>The interface/instance type that introduced "signal-name".</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>signal_id_p</code></em> :</span></p></td> -<td>Location to store the signal id. <span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>]</span> -</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>detail_p</code></em> :</span></p></td> -<td>Location to store the detail quark. <span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>]</span> -</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>force_detail_quark</code></em> :</span></p></td> -<td> -<a href="./../glib/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> forces creation of a <a href="./../glib/glib/glib-Quarks.html#GQuark"><span class="type">GQuark</span></a> for the detail.</td> -</tr> -<tr> -<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> -<td>Whether the signal name could successfully be parsed and <em class="parameter"><code>signal_id_p</code></em> and <em class="parameter"><code>detail_p</code></em> contain valid return values.</td> -</tr> -</tbody> -</table></div> -</div> -<hr> -<div class="refsect2"> -<a name="g-signal-get-invocation-hint"></a><h3>g_signal_get_invocation_hint ()</h3> -<pre class="programlisting"><a class="link" href="gobject-Signals.html#GSignalInvocationHint" title="struct GSignalInvocationHint"><span class="returnvalue">GSignalInvocationHint</span></a> * g_signal_get_invocation_hint (<em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> instance</code></em>);</pre> -<p> -Returns the invocation hint of the innermost signal emission of instance. -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><span class="term"><em class="parameter"><code>instance</code></em> :</span></p></td> -<td>the instance to query</td> -</tr> -<tr> -<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> -<td>the invocation hint of the innermost signal emission. <span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span> -</td> -</tr> -</tbody> -</table></div> -</div> -<hr> -<div class="refsect2"> -<a name="g-signal-type-cclosure-new"></a><h3>g_signal_type_cclosure_new ()</h3> -<pre class="programlisting"><a class="link" href="gobject-Closures.html#GClosure" title="struct GClosure"><span class="returnvalue">GClosure</span></a> * g_signal_type_cclosure_new (<em class="parameter"><code><a class="link" href="gobject-Type-Information.html#GType" title="GType"><span class="type">GType</span></a> itype</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> struct_offset</code></em>);</pre> -<p> -Creates a new closure which invokes the function found at the offset -<em class="parameter"><code>struct_offset</code></em> in the class structure of the interface or classed type -identified by <em class="parameter"><code>itype</code></em>. -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><span class="term"><em class="parameter"><code>itype</code></em> :</span></p></td> -<td>the <a class="link" href="gobject-Type-Information.html#GType" title="GType"><span class="type">GType</span></a> identifier of an interface or classed type</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>struct_offset</code></em> :</span></p></td> -<td>the offset of the member function of <em class="parameter"><code>itype</code></em>'s class -structure which is to be invoked by the new closure</td> -</tr> -<tr> -<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> -<td>a new <a class="link" href="gobject-Closures.html#GCClosure" title="struct GCClosure"><span class="type">GCClosure</span></a> -</td> -</tr> -</tbody> -</table></div> -</div> -<hr> -<div class="refsect2"> -<a name="g-signal-accumulator-first-wins"></a><h3>g_signal_accumulator_first_wins ()</h3> -<pre class="programlisting"><a href="./../glib/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> g_signal_accumulator_first_wins (<em class="parameter"><code><a class="link" href="gobject-Signals.html#GSignalInvocationHint" title="struct GSignalInvocationHint"><span class="type">GSignalInvocationHint</span></a> *ihint</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Generic-values.html#GValue" title="GValue"><span class="type">GValue</span></a> *return_accu</code></em>, - <em class="parameter"><code>const <a class="link" href="gobject-Generic-values.html#GValue" title="GValue"><span class="type">GValue</span></a> *handler_return</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> dummy</code></em>);</pre> -<p> -A predefined <a class="link" href="gobject-Signals.html#GSignalAccumulator" title="GSignalAccumulator ()"><span class="type">GSignalAccumulator</span></a> for signals intended to be used as a -hook for application code to provide a particular value. Usually -only one such value is desired and multiple handlers for the same -signal don't make much sense (except for the case of the default -handler defined in the class structure, in which case you will -usually want the signal connection to override the class handler). -</p> -<p> -This accumulator will use the return value from the first signal -handler that is run as the return value for the signal and not run -any further handlers (ie: the first handler "wins"). -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><span class="term"><em class="parameter"><code>ihint</code></em> :</span></p></td> -<td>standard <a class="link" href="gobject-Signals.html#GSignalAccumulator" title="GSignalAccumulator ()"><span class="type">GSignalAccumulator</span></a> parameter</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>return_accu</code></em> :</span></p></td> -<td>standard <a class="link" href="gobject-Signals.html#GSignalAccumulator" title="GSignalAccumulator ()"><span class="type">GSignalAccumulator</span></a> parameter</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>handler_return</code></em> :</span></p></td> -<td>standard <a class="link" href="gobject-Signals.html#GSignalAccumulator" title="GSignalAccumulator ()"><span class="type">GSignalAccumulator</span></a> parameter</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>dummy</code></em> :</span></p></td> -<td>standard <a class="link" href="gobject-Signals.html#GSignalAccumulator" title="GSignalAccumulator ()"><span class="type">GSignalAccumulator</span></a> parameter</td> -</tr> -<tr> -<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> -<td>standard <a class="link" href="gobject-Signals.html#GSignalAccumulator" title="GSignalAccumulator ()"><span class="type">GSignalAccumulator</span></a> result</td> -</tr> -</tbody> -</table></div> -<p class="since">Since 2.28</p> -</div> -<hr> -<div class="refsect2"> -<a name="g-signal-accumulator-true-handled"></a><h3>g_signal_accumulator_true_handled ()</h3> -<pre class="programlisting"><a href="./../glib/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> g_signal_accumulator_true_handled (<em class="parameter"><code><a class="link" href="gobject-Signals.html#GSignalInvocationHint" title="struct GSignalInvocationHint"><span class="type">GSignalInvocationHint</span></a> *ihint</code></em>, - <em class="parameter"><code><a class="link" href="gobject-Generic-values.html#GValue" title="GValue"><span class="type">GValue</span></a> *return_accu</code></em>, - <em class="parameter"><code>const <a class="link" href="gobject-Generic-values.html#GValue" title="GValue"><span class="type">GValue</span></a> *handler_return</code></em>, - <em class="parameter"><code><a href="./../glib/glib/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> dummy</code></em>);</pre> -<p> -A predefined <a class="link" href="gobject-Signals.html#GSignalAccumulator" title="GSignalAccumulator ()"><span class="type">GSignalAccumulator</span></a> for signals that return a -boolean values. The behavior that this accumulator gives is -that a return of <a href="./../glib/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> stops the signal emission: no further -callbacks will be invoked, while a return of <a href="./../glib/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> allows -the emission to continue. The idea here is that a <a href="./../glib/glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> return -indicates that the callback <span class="emphasis"><em>handled</em></span> the signal, -and no further handling is needed. -</p> -<div class="variablelist"><table border="0"> -<col align="left" valign="top"> -<tbody> -<tr> -<td><p><span class="term"><em class="parameter"><code>ihint</code></em> :</span></p></td> -<td>standard <a class="link" href="gobject-Signals.html#GSignalAccumulator" title="GSignalAccumulator ()"><span class="type">GSignalAccumulator</span></a> parameter</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>return_accu</code></em> :</span></p></td> -<td>standard <a class="link" href="gobject-Signals.html#GSignalAccumulator" title="GSignalAccumulator ()"><span class="type">GSignalAccumulator</span></a> parameter</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>handler_return</code></em> :</span></p></td> -<td>standard <a class="link" href="gobject-Signals.html#GSignalAccumulator" title="GSignalAccumulator ()"><span class="type">GSignalAccumulator</span></a> parameter</td> -</tr> -<tr> -<td><p><span class="term"><em class="parameter"><code>dummy</code></em> :</span></p></td> -<td>standard <a class="link" href="gobject-Signals.html#GSignalAccumulator" title="GSignalAccumulator ()"><span class="type">GSignalAccumulator</span></a> parameter</td> -</tr> -<tr> -<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td> -<td>standard <a class="link" href="gobject-Signals.html#GSignalAccumulator" title="GSignalAccumulator ()"><span class="type">GSignalAccumulator</span></a> result</td> -</tr> -</tbody> -</table></div> -<p class="since">Since 2.4</p> -</div> -</div> -<div class="footnotes"> -<br><hr width="100" align="left"> -<div class="footnote"><p><sup>[<a id="ftn.idp21360704" href="#idp21360704" class="para">10</a>] </sup>Although signals can deal with any kind of instantiatable -type, i'm referring to those types as "object types" in the following, -simply because that is the context most users will encounter signals in. -</p></div> -</div> -</div> -<div class="footer"> -<hr> - Generated by GTK-Doc V1.18</div> -</body> -</html>
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