Pileus Git - ~andy/gtk/blob - gtk/gtktoggleaction.c

   1 /*
   2  * GTK - The GIMP Toolkit
   3  * Copyright (C) 1998, 1999 Red Hat, Inc.
   4  * All rights reserved.
   5  *
   6  * This Library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Library General Public License as
   8  * published by the Free Software Foundation; either version 2 of the
   9  * License, or (at your option) any later version.
  10  *
  11  * This Library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Library General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Library General Public
  17  * License along with the Gnome Library; see the file COPYING.LIB.  If not,
  18  * write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19  * Boston, MA 02111-1307, USA.
  20  */
  21
  22 /*
  23  * Author: James Henstridge <james@daa.com.au>
  24  *
  25  * Modified by the GTK+ Team and others 2003.  See the AUTHORS
  26  * file for a list of people on the GTK+ Team.  See the ChangeLog
  27  * files for a list of changes.  These files are distributed with
  28  * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
  29  */
  30
  31 #include <config.h>
  32
  33 #include "gtktoggleaction.h"
  34 #include "gtktoggleactionprivate.h"
  35 #include "gtktoggletoolbutton.h"
  36 #include "gtktogglebutton.h"
  37 #include "gtkcheckmenuitem.h"
  38
  39 enum
  40 {
  41   TOGGLED,
  42   LAST_SIGNAL
  43 };
  44
  45 static void gtk_toggle_action_init       (GtkToggleAction *action);
  46 static void gtk_toggle_action_class_init (GtkToggleActionClass *class);
  47
  48 GType
  49 gtk_toggle_action_get_type (void)
  50 {
  51   static GtkType type = 0;
  52
  53   if (!type)
  54     {
  55       static const GTypeInfo type_info =
  56       {
  57         sizeof (GtkToggleActionClass),
  58         (GBaseInitFunc) NULL,
  59         (GBaseFinalizeFunc) NULL,
  60         (GClassInitFunc) gtk_toggle_action_class_init,
  61         (GClassFinalizeFunc) NULL,
  62         NULL,
  63
  64         sizeof (GtkToggleAction),
  65         0, /* n_preallocs */
  66         (GInstanceInitFunc) gtk_toggle_action_init,
  67       };
  68
  69       type = g_type_register_static (GTK_TYPE_ACTION,
  70                                      "GtkToggleAction",
  71                                      &type_info, 0);
  72     }
  73   return type;
  74 }
  75
  76 static void gtk_toggle_action_activate     (GtkAction *action);
  77 static void gtk_toggle_action_real_toggled (GtkToggleAction *action);
  78 static void connect_proxy                  (GtkAction *action,
  79                                             GtkWidget *proxy);
  80 static void disconnect_proxy               (GtkAction *action,
  81                                             GtkWidget *proxy);
  82
  83 static GObjectClass *parent_class = NULL;
  84 static guint         action_signals[LAST_SIGNAL] = { 0 };
  85
  86 static void
  87 gtk_toggle_action_class_init (GtkToggleActionClass *klass)
  88 {
  89   GObjectClass *gobject_class;
  90   GtkActionClass *action_class;
  91
  92   parent_class = g_type_class_peek_parent (klass);
  93   gobject_class = G_OBJECT_CLASS (klass);
  94   action_class = GTK_ACTION_CLASS (klass);
  95
  96   action_class->activate = gtk_toggle_action_activate;
  97   action_class->connect_proxy = connect_proxy;
  98   action_class->disconnect_proxy = disconnect_proxy;
  99
 100   action_class->menu_item_type = GTK_TYPE_CHECK_MENU_ITEM;
 101   action_class->toolbar_item_type = GTK_TYPE_TOGGLE_TOOL_BUTTON;
 102
 103   klass->toggled = gtk_toggle_action_real_toggled;
 104
 105   action_signals[TOGGLED] =
 106     g_signal_new ("toggled",
 107                   G_OBJECT_CLASS_TYPE (klass),
 108                   G_SIGNAL_RUN_FIRST,
 109                   G_STRUCT_OFFSET (GtkToggleActionClass, toggled),
 110                   NULL, NULL,
 111                   g_cclosure_marshal_VOID__VOID,
 112                   G_TYPE_NONE, 0);
 113
 114   g_type_class_add_private (gobject_class, sizeof (GtkToggleActionPrivate));
 115 }
 116
 117 static void
 118 gtk_toggle_action_init (GtkToggleAction *action)
 119 {
 120   action->private_data = GTK_TOGGLE_ACTION_GET_PRIVATE (action);
 121   action->private_data->active = FALSE;
 122 }
 123
 124 static void
 125 gtk_toggle_action_activate (GtkAction *action)
 126 {
 127   GtkToggleAction *toggle_action;
 128
 129   g_return_if_fail (GTK_IS_TOGGLE_ACTION (action));
 130
 131   toggle_action = GTK_TOGGLE_ACTION (action);
 132
 133   toggle_action->private_data->active = !toggle_action->private_data->active;
 134
 135   gtk_toggle_action_toggled (toggle_action);
 136 }
 137
 138 static void
 139 gtk_toggle_action_real_toggled (GtkToggleAction *action)
 140 {
 141   GSList *slist;
 142
 143   g_return_if_fail (GTK_IS_TOGGLE_ACTION (action));
 144
 145   for (slist = gtk_action_get_proxies (GTK_ACTION (action)); slist; slist = slist->next)
 146     {
 147       GtkWidget *proxy = slist->data;
 148
 149       gtk_action_block_activate_from (GTK_ACTION (action), proxy);
 150       if (GTK_IS_CHECK_MENU_ITEM (proxy))
 151         gtk_check_menu_item_set_active (GTK_CHECK_MENU_ITEM (proxy),
 152                                         action->private_data->active);
 153       else if (GTK_IS_TOGGLE_TOOL_BUTTON (proxy))
 154         gtk_toggle_tool_button_set_active (GTK_TOGGLE_TOOL_BUTTON (proxy),
 155                                            action->private_data->active);
 156       else if (GTK_IS_TOGGLE_BUTTON (proxy))
 157         gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (proxy),
 158                                       action->private_data->active);
 159       else {
 160         g_warning ("Don't know how to toggle `%s' widgets",
 161                    G_OBJECT_TYPE_NAME (proxy));
 162       }
 163       gtk_action_unblock_activate_from (GTK_ACTION (action), proxy);
 164     }
 165 }
 166
 167 static void
 168 connect_proxy (GtkAction *action,
 169                GtkWidget *proxy)
 170 {
 171   GtkToggleAction *toggle_action;
 172
 173   toggle_action = GTK_TOGGLE_ACTION (action);
 174
 175   /* do this before hand, so that we don't call the "activate" handler */
 176   if (GTK_IS_MENU_ITEM (proxy))
 177     gtk_check_menu_item_set_active (GTK_CHECK_MENU_ITEM (proxy),
 178                                     toggle_action->private_data->active);
 179   else if (GTK_IS_TOGGLE_TOOL_BUTTON (proxy))
 180     gtk_toggle_tool_button_set_active (GTK_TOGGLE_TOOL_BUTTON (proxy),
 181                                        toggle_action->private_data->active);
 182   else if (GTK_IS_TOGGLE_BUTTON (proxy))
 183     gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (proxy),
 184                                   toggle_action->private_data->active);
 185
 186   (* GTK_ACTION_CLASS (parent_class)->connect_proxy) (action, proxy);
 187 }
 188
 189 static void
 190 disconnect_proxy (GtkAction *action,
 191                   GtkWidget *proxy)
 192 {
 193   GtkToggleAction *toggle_action;
 194
 195   toggle_action = GTK_TOGGLE_ACTION (action);
 196
 197   (* GTK_ACTION_CLASS (parent_class)->disconnect_proxy) (action, proxy);
 198 }
 199
 200 /**
 201  * gtk_toggle_action_toggled:
 202  * @action: the action object
 203  *
 204  * Emits the "toggled" signal on the toggle action.
 205  *
 206  * Since: 2.4
 207  */
 208 void
 209 gtk_toggle_action_toggled (GtkToggleAction *action)
 210 {
 211   g_return_if_fail (GTK_IS_TOGGLE_ACTION (action));
 212
 213   g_signal_emit (action, action_signals[TOGGLED], 0);
 214 }
 215
 216 /**
 217  * gtk_toggle_action_set_active:
 218  * @action: the action object
 219  * @is_active: whether the action should be checked or not
 220  *
 221  * Sets the checked state on the toggle action.
 222  *
 223  * Since: 2.4
 224  */
 225 void
 226 gtk_toggle_action_set_active (GtkToggleAction *action,
 227                               gboolean         is_active)
 228 {
 229   g_return_if_fail (GTK_IS_TOGGLE_ACTION (action));
 230
 231   is_active = is_active != FALSE;
 232
 233   if (action->private_data->active != is_active)
 234     {
 235       gtk_action_activate (GTK_ACTION (action));
 236     }
 237 }
 238
 239 /**
 240  * gtk_toggle_action_get_active:
 241  * @action: the action object
 242  *
 243  * Returns: the checked state of the toggle action
 244  *
 245  * Since: 2.4
 246  */
 247 gboolean
 248 gtk_toggle_action_get_active (GtkToggleAction *action)
 249 {
 250   g_return_val_if_fail (GTK_IS_TOGGLE_ACTION (action), FALSE);
 251
 252   return action->private_data->active;
 253 }