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/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/* e-gtk-utils.c
*
* Copyright (C) 2000 Ximian, Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of version 2 of the GNU General Public
* License as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
* Author: Ettore Perazzoli
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <gtk/gtklayout.h>
#include <gtk/gtksignal.h>
#include <gtk/gtkwidget.h>
#include <gdk/gdkx.h>
#include <X11/Xlib.h>
#include "e-gtk-utils.h"
void
e_signal_connect_while_alive (void *instance,
const char *name,
GCallback callback,
void *callback_data,
void *alive_instance)
{
GClosure *closure;
g_return_if_fail (GTK_IS_OBJECT (instance));
closure = g_cclosure_new (callback, callback_data, NULL);
g_object_watch_closure (alive_instance, closure);
g_signal_connect_closure_by_id (instance, g_signal_lookup (name, G_OBJECT_TYPE (instance)), 0,
closure, FALSE);
}
/* (Cut and pasted from Gtk.) */
typedef struct DisconnectInfo {
unsigned int signal_handler;
GtkObject *object1;
unsigned int disconnect_handler1;
GtkObject *object2;
unsigned int disconnect_handler2;
} DisconnectInfo;
static unsigned int
alive_disconnecter (GtkObject *object,
DisconnectInfo *info)
{
g_assert (info != NULL);
gtk_signal_disconnect (info->object1, info->disconnect_handler1);
gtk_signal_disconnect (info->object1, info->signal_handler);
gtk_signal_disconnect (info->object2, info->disconnect_handler2);
g_free (info);
return 0;
}
/**
* e_gtk_signal_connect_full_while_alive:
* @object:
* @name:
* @func:
* @marshal:
* @data:
* @destroy_func:
* @object_signal:
* @after:
* @alive_object:
*
* Connect a signal like `gtk_signal_connect_while_alive()', but with full
* params like `gtk_signal_connect_full()'.
**/
void
e_signal_connect_full_while_alive (void *instance,
const char *name,
GtkSignalFunc func,
GtkCallbackMarshal marshal,
void *data,
GtkDestroyNotify destroy_func,
gboolean instance_signal,
gboolean after,
void *alive_instance)
{
DisconnectInfo *info;
g_return_if_fail (GTK_IS_OBJECT (instance));
g_return_if_fail (name != NULL);
g_return_if_fail (func != NULL);
g_return_if_fail (GTK_IS_OBJECT (alive_instance));
info = g_new (DisconnectInfo, 1);
info->signal_handler = gtk_signal_connect_full (instance, name,
func, marshal, data,
destroy_func,
instance_signal, after);
info->object1 = instance;
info->disconnect_handler1 = gtk_signal_connect (instance, "destroy",
GTK_SIGNAL_FUNC (alive_disconnecter), info);
info->object2 = alive_instance;
info->disconnect_handler2 = gtk_signal_connect (alive_instance, "destroy",
GTK_SIGNAL_FUNC (alive_disconnecter), info);
}
/* BackingStore support. */
static void
widget_realize_callback_for_backing_store (GtkWidget *widget,
void *data)
{
XSetWindowAttributes attributes;
GdkWindow *window;
if (GTK_IS_LAYOUT (widget))
window = GTK_LAYOUT (widget)->bin_window;
else
window = widget->window;
attributes.backing_store = Always;
XChangeWindowAttributes (GDK_WINDOW_XDISPLAY (window), GDK_WINDOW_XWINDOW (window),
CWBackingStore, &attributes);
}
/**
* e_make_widget_backing_stored:
* @widget: A GtkWidget
*
* Make sure that the window for @widget has the BackingStore attribute set to
* Always when realized. This will allow the widget to be refreshed by the X
* server even if the application is currently not responding to X events (this
* is e.g. very useful for the splash screen).
*
* Notice that this will not work 100% in all cases as the server might not
* support that or just refuse to do so.
**/
void
e_make_widget_backing_stored (GtkWidget *widget)
{
gtk_signal_connect (GTK_OBJECT (widget), "realize",
GTK_SIGNAL_FUNC (widget_realize_callback_for_backing_store), NULL);
}
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