git.maemo.org Git - hildon/blob - hildon-widgets/hildon-dialoghelp.c

   1 /*
   2  * This file is part of hildon-libs
   3  *
   4  * Copyright (C) 2005 Nokia Corporation.
   5  *
   6  * Contact: Luc Pionchon <luc.pionchon@nokia.com>
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public License
  10  * as published by the Free Software Foundation; either version 2.1 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  21  * 02110-1301 USA
  22  *
  23  */
  24
  25 /*
  26  *  @file hildon-dialoghelp.c
  27  *
  28  *  This file provides API for the help dialog with
  29  *  the optional icon.
  30  *
  31  */
  32
  33 #include <gdk/gdkx.h>
  34 #include "hildon-dialoghelp.h"
  35
  36 static guint help_signal = 0;
  37
  38 static GdkFilterReturn
  39 handle_xevent(GdkXEvent * xevent, GdkEvent * event, gpointer data)
  40 {
  41     XAnyEvent *eventti = xevent;
  42
  43     if (eventti->type == ClientMessage) {
  44         Atom help_atom, wm_atom;
  45         Display *disp;
  46         XClientMessageEvent *cm;
  47
  48         disp = GDK_DISPLAY();
  49         cm = xevent;
  50
  51         help_atom = XInternAtom(disp, "_NET_WM_CONTEXT_HELP", True);
  52         wm_atom = XInternAtom(disp, "WM_PROTOCOLS", True);
  53
  54         if (cm->message_type == wm_atom && cm->data.l[0] == help_atom) {
  55             /* XClientMessageEvent *cm = xevent; */
  56             g_signal_emit(G_OBJECT(data), help_signal, 0);
  57         }
  58
  59         return GDK_FILTER_REMOVE;       /* Event handled, don't process
  60                                            further */
  61     }
  62
  63     return GDK_FILTER_CONTINUE; /* Event not handled */
  64 }
  65
  66 /**
  67  * gtk_dialog_help_enable:
  68  * @dialog: The dialog of which help is to be enabled.
  69  *
  70  * Enables context help button for given dialog. The signal "help" can be
  71  * connected to handler by normal gtk methods. Note that this function
  72  * has to be called before the dialog is shown.
  73  *
  74  * The "help" signal itself has no other parameters than the dialog where
  75  * it is connected to, ie.:
  76  * void user_function(GtkDialog *, gpointer user_data);
  77  **/
  78 void gtk_dialog_help_enable(GtkDialog * dialog)
  79 {
  80     GdkWindow *window;
  81     GdkDisplay *display;
  82     Atom protocols[4];
  83     int n = 0;
  84
  85     if (help_signal == 0) {
  86         help_signal = g_signal_new("help", GTK_TYPE_DIALOG,
  87                                    G_SIGNAL_ACTION, (guint) - 1, NULL,
  88                                    NULL, g_cclosure_marshal_VOID__VOID,
  89                                    G_TYPE_NONE, 0);
  90     }
  91
  92     g_return_if_fail(GTK_IS_DIALOG(dialog));
  93
  94     gtk_widget_realize(GTK_WIDGET(dialog));
  95     window = GTK_WIDGET(dialog)->window;
  96
  97     display = gdk_drawable_get_display (window);
  98
  99     protocols[n++] = gdk_x11_get_xatom_by_name_for_display (display, "WM_DELETE_WINDOW");
 100     protocols[n++] = gdk_x11_get_xatom_by_name_for_display (display, "WM_TAKE_FOCUS");
 101     protocols[n++] = gdk_x11_get_xatom_by_name_for_display (display, "_NET_WM_PING");
 102     protocols[n++] = gdk_x11_get_xatom_by_name_for_display (display, "_NET_WM_CONTEXT_HELP");
 103
 104     XSetWMProtocols (GDK_DISPLAY_XDISPLAY (display), GDK_WINDOW_XID (window), protocols, n);
 105
 106     gdk_window_add_filter(window, handle_xevent, dialog);
 107 }
 108
 109
 110 /*
 111  * gtk_dialog_help_disable:
 112  * @dialog: The dialog of which help is to be disabled.
 113  *
 114  */
 115 void gtk_dialog_help_disable(GtkDialog * dialog)
 116 {
 117     GdkWindow *window=NULL;
 118     GdkDisplay *display;
 119     Atom protocols[4];
 120     int n = 0;
 121
 122     g_return_if_fail(GTK_IS_DIALOG(dialog));
 123
 124     gtk_widget_realize(GTK_WIDGET(dialog));
 125     window = GTK_WIDGET(dialog)->window;
 126     display = gdk_drawable_get_display (window);
 127
 128     protocols[n++] = gdk_x11_get_xatom_by_name_for_display (display, "WM_DELETE_WINDOW");
 129     protocols[n++] = gdk_x11_get_xatom_by_name_for_display (display, "WM_TAKE_FOCUS");
 130     protocols[n++] = gdk_x11_get_xatom_by_name_for_display (display, "_NET_WM_PING");
 131
 132     XSetWMProtocols (GDK_DISPLAY_XDISPLAY (display), GDK_WINDOW_XID (window), protocols, n);
 133
 134     gdk_window_add_filter(window, handle_xevent, dialog);
 135 }
 136
 137
 138
 139