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

   1 /*
   2  * Copyright © 2011 Canonical Limited
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the licence, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  *
  19  * Author: Ryan Lortie <desrt@desrt.ca>
  20  */
  21
  22 #include "config.h"
  23
  24 #include "gtkapplicationwindow.h"
  25
  26 #include "gtkseparatormenuitem.h"
  27 #include "gtkcheckmenuitem.h"
  28 #include "gtkmenubar.h"
  29 #include "gactionmuxer.h"
  30
  31 struct _GtkApplicationWindowPrivate
  32 {
  33   GSimpleActionGroup *actions;
  34   GtkMenuBar *menubar;
  35
  36   guint initialized_app_menu : 1;
  37   guint default_show_app_menu : 1;
  38   guint did_override_show_app_menu : 1;
  39   guint override_show_app_menu : 1;
  40 };
  41
  42 static void
  43 recalculate_app_menu_state (GtkApplicationWindow   *window);
  44
  45 static void
  46 on_shell_shows_app_menu_changed (GtkSettings   *settings,
  47                                  GParamSpec    *pspec,
  48                                  gpointer       user_data)
  49 {
  50   GtkApplicationWindow *window = GTK_APPLICATION_WINDOW (user_data);
  51   gboolean val;
  52
  53   g_object_get (settings, "gtk-shell-shows-app-menu", &val, NULL);
  54   window->priv->default_show_app_menu = !val;
  55   recalculate_app_menu_state (window);
  56 }
  57
  58 static gchar **
  59 gtk_application_window_list_actions (GActionGroup *group)
  60 {
  61   GtkApplicationWindow *window = GTK_APPLICATION_WINDOW (group);
  62
  63   return g_action_group_list_actions (G_ACTION_GROUP (window->priv->actions));
  64 }
  65
  66 static gboolean
  67 gtk_application_window_query_action (GActionGroup        *group,
  68                                      const gchar         *action_name,
  69                                      gboolean            *enabled,
  70                                      const GVariantType **parameter_type,
  71                                      const GVariantType **state_type,
  72                                      GVariant           **state_hint,
  73                                      GVariant           **state)
  74 {
  75   GtkApplicationWindow *window = GTK_APPLICATION_WINDOW (group);
  76
  77   return g_action_group_query_action (G_ACTION_GROUP (window->priv->actions),
  78                                       action_name, enabled, parameter_type, state_type, state_hint, state);
  79 }
  80
  81 static void
  82 gtk_application_window_activate_action (GActionGroup *group,
  83                                         const gchar  *action_name,
  84                                         GVariant     *parameter)
  85 {
  86   GtkApplicationWindow *window = GTK_APPLICATION_WINDOW (group);
  87
  88   return g_action_group_activate_action (G_ACTION_GROUP (window->priv->actions), action_name, parameter);
  89 }
  90
  91 static void
  92 gtk_application_window_change_action_state (GActionGroup *group,
  93                                             const gchar  *action_name,
  94                                             GVariant     *state)
  95 {
  96   GtkApplicationWindow *window = GTK_APPLICATION_WINDOW (group);
  97
  98   return g_action_group_change_action_state (G_ACTION_GROUP (window->priv->actions), action_name, state);
  99 }
 100
 101 static GAction *
 102 gtk_application_window_lookup_action (GActionMap *action_map,
 103                                       const gchar *action_name)
 104 {
 105   GtkApplicationWindow *window = GTK_APPLICATION_WINDOW (action_map);
 106
 107   return g_action_map_lookup_action (G_ACTION_MAP (window->priv->actions), action_name);
 108 }
 109
 110 static void
 111 gtk_application_window_add_action (GActionMap *action_map,
 112                                    GAction    *action)
 113 {
 114   GtkApplicationWindow *window = GTK_APPLICATION_WINDOW (action_map);
 115
 116   g_action_map_add_action (G_ACTION_MAP (window->priv->actions), action);
 117 }
 118
 119 static void
 120 gtk_application_window_remove_action (GActionMap  *action_map,
 121                                       const gchar *action_name)
 122 {
 123   GtkApplicationWindow *window = GTK_APPLICATION_WINDOW (action_map);
 124
 125   g_action_map_remove_action (G_ACTION_MAP (window->priv->actions), action_name);
 126 }
 127
 128 static void
 129 gtk_application_window_group_iface_init (GActionGroupInterface *iface)
 130 {
 131   iface->list_actions = gtk_application_window_list_actions;
 132   iface->query_action = gtk_application_window_query_action;
 133   iface->activate_action = gtk_application_window_activate_action;
 134   iface->change_action_state = gtk_application_window_change_action_state;
 135 }
 136
 137 static void
 138 gtk_application_window_map_iface_init (GActionMapInterface *iface)
 139 {
 140   iface->lookup_action = gtk_application_window_lookup_action;
 141   iface->add_action = gtk_application_window_add_action;
 142   iface->remove_action = gtk_application_window_remove_action;
 143 }
 144
 145 G_DEFINE_TYPE_WITH_CODE (GtkApplicationWindow, gtk_application_window, GTK_TYPE_WINDOW,
 146                          G_IMPLEMENT_INTERFACE (G_TYPE_ACTION_GROUP, gtk_application_window_group_iface_init)
 147                          G_IMPLEMENT_INTERFACE (G_TYPE_ACTION_MAP, gtk_application_window_map_iface_init))
 148
 149 enum {
 150   PROP_0,
 151   PROP_SHOW_APP_MENU,
 152   N_PROPS
 153 };
 154 static GParamSpec *gtk_application_window_properties[N_PROPS];
 155
 156 static void
 157 gtk_application_window_real_get_preferred_height (GtkWidget *widget,
 158                                                   gint      *minimum_height,
 159                                                   gint      *natural_height)
 160 {
 161   GtkApplicationWindow *window = GTK_APPLICATION_WINDOW (widget);
 162
 163   GTK_WIDGET_CLASS (gtk_application_window_parent_class)
 164     ->get_preferred_height (widget, minimum_height, natural_height);
 165
 166   if (window->priv->menubar != NULL)
 167     {
 168       gint menubar_min_height, menubar_nat_height;
 169
 170       gtk_widget_get_preferred_height (GTK_WIDGET (window->priv->menubar), &menubar_min_height, &menubar_nat_height);
 171       *minimum_height += menubar_min_height;
 172       *natural_height += menubar_nat_height;
 173     }
 174 }
 175
 176 static void
 177 gtk_application_window_real_get_preferred_height_for_width (GtkWidget *widget,
 178                                                             gint       width,
 179                                                             gint      *minimum_height,
 180                                                             gint      *natural_height)
 181 {
 182   GtkApplicationWindow *window = GTK_APPLICATION_WINDOW (widget);
 183
 184   GTK_WIDGET_CLASS (gtk_application_window_parent_class)
 185     ->get_preferred_height_for_width (widget, width, minimum_height, natural_height);
 186
 187   if (window->priv->menubar != NULL)
 188     {
 189       gint menubar_min_height, menubar_nat_height;
 190
 191       gtk_widget_get_preferred_height_for_width (GTK_WIDGET (window->priv->menubar), width, &menubar_min_height, &menubar_nat_height);
 192       *minimum_height += menubar_min_height;
 193       *natural_height += menubar_nat_height;
 194     }
 195 }
 196
 197 static void
 198 gtk_application_window_real_get_preferred_width (GtkWidget *widget,
 199                                                  gint      *minimum_width,
 200                                                  gint      *natural_width)
 201 {
 202   GtkApplicationWindow *window = GTK_APPLICATION_WINDOW (widget);
 203
 204   GTK_WIDGET_CLASS (gtk_application_window_parent_class)
 205     ->get_preferred_width (widget, minimum_width, natural_width);
 206
 207   if (window->priv->menubar != NULL)
 208     {
 209       gint menubar_min_width, menubar_nat_width;
 210
 211       gtk_widget_get_preferred_width (GTK_WIDGET (window->priv->menubar), &menubar_min_width, &menubar_nat_width);
 212       *minimum_width = MAX (*minimum_width, menubar_min_width);
 213       *natural_width = MAX (*natural_width, menubar_nat_width);
 214     }
 215 }
 216
 217 static void
 218 gtk_application_window_real_get_preferred_width_for_height (GtkWidget *widget,
 219                                                             gint       height,
 220                                                             gint      *minimum_width,
 221                                                             gint      *natural_width)
 222 {
 223   GtkApplicationWindow *window = GTK_APPLICATION_WINDOW (widget);
 224
 225   GTK_WIDGET_CLASS (gtk_application_window_parent_class)
 226     ->get_preferred_width_for_height (widget, height, minimum_width, natural_width);
 227
 228   if (window->priv->menubar != NULL)
 229     {
 230       gint menubar_min_width, menubar_nat_width;
 231
 232       gtk_widget_get_preferred_width_for_height (GTK_WIDGET (window->priv->menubar), height, &menubar_min_width, &menubar_nat_width);
 233       *minimum_width = MAX (*minimum_width, menubar_min_width);
 234       *natural_width = MAX (*natural_width, menubar_nat_width);
 235     }
 236 }
 237
 238 static void
 239 gtk_application_window_real_size_allocate (GtkWidget     *widget,
 240                                            GtkAllocation *allocation)
 241 {
 242   GtkApplicationWindow *window = GTK_APPLICATION_WINDOW (widget);
 243
 244   if (window->priv->menubar != NULL)
 245     {
 246       GtkAllocation menubar_allocation = *allocation;
 247       gint menubar_min_height, menubar_nat_height;
 248       GtkWidget *child;
 249
 250       gtk_widget_get_preferred_height_for_width (GTK_WIDGET (window->priv->menubar), allocation->width, &menubar_min_height, &menubar_nat_height);
 251
 252       menubar_allocation.height = menubar_min_height;
 253       gtk_widget_size_allocate (GTK_WIDGET (window->priv->menubar), &menubar_allocation);
 254
 255       child = gtk_bin_get_child (GTK_BIN (window));
 256       if (child != NULL && gtk_widget_get_visible (child))
 257         {
 258           GtkAllocation child_allocation = *allocation;
 259           gint border_width;
 260
 261           child_allocation.height = MAX (1, child_allocation.height - menubar_min_height);
 262
 263           border_width = gtk_container_get_border_width (GTK_CONTAINER (window));
 264           child_allocation.x += border_width;
 265           child_allocation.y += border_width + menubar_min_height;
 266           child_allocation.width -= border_width * 2;
 267           child_allocation.height -= border_width * 2 - menubar_min_height;
 268           gtk_widget_size_allocate (child, &child_allocation);
 269         }
 270
 271       gtk_widget_set_allocation (widget, allocation);
 272     }
 273   else
 274     GTK_WIDGET_CLASS (gtk_application_window_parent_class)
 275       ->size_allocate (widget, allocation);
 276 }
 277
 278 static void
 279 gtk_application_window_real_realize (GtkWidget *widget)
 280 {
 281   GtkApplicationWindow *window = GTK_APPLICATION_WINDOW (widget);
 282
 283   if (!window->priv->initialized_app_menu)
 284     {
 285       window->priv->initialized_app_menu = TRUE;
 286       g_signal_connect (gtk_widget_get_settings ((GtkWidget*)window),
 287                         "notify::gtk-shell-shows-app-menu",
 288                         G_CALLBACK (on_shell_shows_app_menu_changed),
 289                         window);
 290       on_shell_shows_app_menu_changed (gtk_widget_get_settings ((GtkWidget*)window), NULL, window);
 291     }
 292
 293   GTK_WIDGET_CLASS (gtk_application_window_parent_class)
 294     ->realize (widget);
 295 }
 296
 297 static void
 298 gtk_application_window_real_map (GtkWidget *widget)
 299 {
 300   GtkApplicationWindow *window = GTK_APPLICATION_WINDOW (widget);
 301
 302   /* XXX could elimate this by tweaking gtk_window_map */
 303   if (window->priv->menubar)
 304     gtk_widget_map (GTK_WIDGET (window->priv->menubar));
 305
 306   GTK_WIDGET_CLASS (gtk_application_window_parent_class)
 307     ->map (widget);
 308 }
 309
 310 static void
 311 gtk_application_window_real_forall_internal (GtkContainer *container,
 312                                              gboolean      include_internal,
 313                                              GtkCallback   callback,
 314                                              gpointer      user_data)
 315 {
 316   GtkApplicationWindow *window = GTK_APPLICATION_WINDOW (container);
 317
 318   if (window->priv->menubar)
 319     callback (GTK_WIDGET (window->priv->menubar), user_data);
 320
 321   GTK_CONTAINER_CLASS (gtk_application_window_parent_class)
 322     ->forall (container, include_internal, callback, user_data);
 323 }
 324
 325
 326 static void
 327 gtk_application_window_get_property (GObject *object, guint prop_id,
 328                                      GValue *value, GParamSpec *pspec)
 329 {
 330   GtkApplicationWindow *window = GTK_APPLICATION_WINDOW (object);
 331
 332   switch (prop_id)
 333     {
 334     case PROP_SHOW_APP_MENU:
 335       g_value_set_boolean (value, window->priv->override_show_app_menu);
 336       break;
 337
 338     default:
 339       g_assert_not_reached ();
 340     }
 341 }
 342
 343 static void
 344 gtk_application_window_set_property (GObject *object, guint prop_id,
 345                                      const GValue *value, GParamSpec *pspec)
 346 {
 347   GtkApplicationWindow *window = GTK_APPLICATION_WINDOW (object);
 348
 349   switch (prop_id)
 350     {
 351     case PROP_SHOW_APP_MENU:
 352       gtk_application_window_set_show_app_menu (window, g_value_get_boolean (value));
 353       break;
 354
 355     default:
 356       g_assert_not_reached ();
 357     }
 358 }
 359
 360 static void
 361 gtk_application_window_finalize (GObject *object)
 362 {
 363   GtkApplicationWindow *window = GTK_APPLICATION_WINDOW (object);
 364
 365   if (window->priv->menubar)
 366     g_object_unref (window->priv->menubar);
 367
 368   g_object_unref (window->priv->actions);
 369
 370   G_OBJECT_CLASS (gtk_application_window_parent_class)
 371     ->finalize (object);
 372 }
 373
 374 static void
 375 gtk_application_window_init (GtkApplicationWindow *window)
 376 {
 377   window->priv = G_TYPE_INSTANCE_GET_PRIVATE (window, GTK_TYPE_APPLICATION_WINDOW, GtkApplicationWindowPrivate);
 378
 379   window->priv->actions = g_simple_action_group_new ();
 380
 381   /* window->priv->actions is the one and only ref on the group, so when
 382    * we finalize, the action group will die, disconnecting all signals.
 383    */
 384   g_signal_connect_swapped (window->priv->actions, "action-added",
 385                             G_CALLBACK (g_action_group_action_added), window);
 386   g_signal_connect_swapped (window->priv->actions, "action-enabled-changed",
 387                             G_CALLBACK (g_action_group_action_enabled_changed), window);
 388   g_signal_connect_swapped (window->priv->actions, "action-state-changed",
 389                             G_CALLBACK (g_action_group_action_state_changed), window);
 390   g_signal_connect_swapped (window->priv->actions, "action-removed",
 391                             G_CALLBACK (g_action_group_action_removed), window);
 392 }
 393
 394 static void
 395 gtk_application_window_class_init (GtkApplicationWindowClass *class)
 396 {
 397   GtkContainerClass *container_class = GTK_CONTAINER_CLASS (class);
 398   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
 399   GObjectClass *object_class = G_OBJECT_CLASS (class);
 400
 401   container_class->forall = gtk_application_window_real_forall_internal;
 402   widget_class->get_preferred_height = gtk_application_window_real_get_preferred_height;
 403   widget_class->get_preferred_height_for_width = gtk_application_window_real_get_preferred_height_for_width;
 404   widget_class->get_preferred_width = gtk_application_window_real_get_preferred_width;
 405   widget_class->get_preferred_width_for_height = gtk_application_window_real_get_preferred_width_for_height;
 406   widget_class->size_allocate = gtk_application_window_real_size_allocate;
 407   widget_class->realize = gtk_application_window_real_realize;
 408   widget_class->map = gtk_application_window_real_map;
 409   object_class->get_property = gtk_application_window_get_property;
 410   object_class->set_property = gtk_application_window_set_property;
 411   object_class->finalize = gtk_application_window_finalize;
 412
 413   gtk_application_window_properties[PROP_SHOW_APP_MENU] =
 414     g_param_spec_boolean ("show-app-menu", "show application menu",
 415                           "TRUE if the application menu should be included in the menubar at the top of the window",
 416                           FALSE, G_PARAM_STATIC_STRINGS | G_PARAM_READWRITE);
 417   g_object_class_install_properties (object_class, N_PROPS, gtk_application_window_properties);
 418   g_type_class_add_private (class, sizeof (GtkApplicationWindowPrivate));
 419 }
 420
 421 GtkWidget *
 422 gtk_application_window_new (GtkApplication *application)
 423 {
 424   g_return_val_if_fail (GTK_IS_APPLICATION (application), NULL);
 425
 426   return g_object_new (GTK_TYPE_APPLICATION_WINDOW,
 427                        "application", application,
 428                        NULL);
 429 }
 430
 431 gboolean
 432 gtk_application_window_get_show_app_menu (GtkApplicationWindow *window)
 433 {
 434   return window->priv->override_show_app_menu;
 435 }
 436
 437 static void
 438 recalculate_app_menu_state (GtkApplicationWindow   *window)
 439 {
 440   if ((window->priv->did_override_show_app_menu
 441        && window->priv->override_show_app_menu)
 442       || window->priv->default_show_app_menu)
 443     {
 444       GtkWidget *menubar;
 445       GtkWidget *item;
 446
 447       item = gtk_menu_item_new_with_label ("Application");
 448       gtk_menu_item_set_submenu (GTK_MENU_ITEM (item), gtk_application_window_get_app_menu (window));
 449
 450       menubar = gtk_menu_bar_new ();
 451       window->priv->menubar = g_object_ref_sink (menubar);
 452       gtk_menu_shell_append (GTK_MENU_SHELL (menubar), item);
 453       gtk_widget_set_parent (menubar, GTK_WIDGET (window));
 454       gtk_widget_show_all (menubar);
 455     }
 456   else
 457     {
 458       gtk_widget_unparent (GTK_WIDGET (window->priv->menubar));
 459       g_object_unref (window->priv->menubar);
 460     }
 461 }
 462
 463 void
 464 gtk_application_window_set_show_app_menu (GtkApplicationWindow *window,
 465                                           gboolean              show_app_menu)
 466 {
 467   show_app_menu = !!show_app_menu;
 468   window->priv->did_override_show_app_menu = TRUE;
 469   if (window->priv->override_show_app_menu != show_app_menu)
 470     {
 471       window->priv->override_show_app_menu = show_app_menu;
 472       recalculate_app_menu_state (window);
 473       g_object_notify_by_pspec (G_OBJECT (window), gtk_application_window_properties[PROP_SHOW_APP_MENU]);
 474     }
 475 }
 476
 477 /* GtkMenu construction {{{1 */
 478
 479 typedef struct {
 480   GActionGroup *group;
 481   gchar        *name;
 482   gchar        *target;
 483   gulong        enabled_changed_id;
 484   gulong        state_changed_id;
 485   gulong        activate_handler;
 486 } ActionData;
 487
 488 static void
 489 action_data_free (gpointer data)
 490 {
 491   ActionData *a = data;
 492
 493   if (a->enabled_changed_id)
 494     g_signal_handler_disconnect (a->group, a->enabled_changed_id);
 495
 496   if (a->state_changed_id)
 497     g_signal_handler_disconnect (a->group, a->state_changed_id);
 498
 499   g_object_unref (a->group);
 500   g_free (a->name);
 501   g_free (a->target);
 502
 503   g_free (a);
 504 }
 505
 506 static void
 507 enabled_changed (GActionGroup *group,
 508                  const gchar  *action_name,
 509                  gboolean      enabled,
 510                  GtkWidget    *widget)
 511 {
 512   gtk_widget_set_sensitive (widget, enabled);
 513 }
 514
 515 static void
 516 item_activated (GtkWidget *w,
 517                 gpointer   data)
 518 {
 519   ActionData *a;
 520   GVariant *parameter;
 521
 522   a = g_object_get_data (G_OBJECT (w), "action");
 523   if (a->target)
 524     parameter = g_variant_ref_sink (g_variant_new_string (a->target));
 525   else
 526     parameter = NULL;
 527   g_action_group_activate_action (a->group, a->name, parameter);
 528   if (parameter)
 529     g_variant_unref (parameter);
 530 }
 531
 532 static void
 533 toggle_state_changed (GActionGroup     *group,
 534                       const gchar      *name,
 535                       GVariant         *state,
 536                       GtkCheckMenuItem *w)
 537 {
 538   ActionData *a;
 539
 540   a = g_object_get_data (G_OBJECT (w), "action");
 541   g_signal_handler_block (w, a->activate_handler);
 542   gtk_check_menu_item_set_active (w, g_variant_get_boolean (state));
 543   g_signal_handler_unblock (w, a->activate_handler);
 544 }
 545
 546 static void
 547 radio_state_changed (GActionGroup     *group,
 548                      const gchar      *name,
 549                      GVariant         *state,
 550                      GtkCheckMenuItem *w)
 551 {
 552   ActionData *a;
 553   gboolean b;
 554
 555   a = g_object_get_data (G_OBJECT (w), "action");
 556   g_signal_handler_block (w, a->activate_handler);
 557   b = g_strcmp0 (a->target, g_variant_get_string (state, NULL)) == 0;
 558   gtk_check_menu_item_set_active (w, b);
 559   g_signal_handler_unblock (w, a->activate_handler);
 560 }
 561
 562 static GtkWidget *
 563 create_menuitem_from_model (GMenuModel   *model,
 564                             gint          item,
 565                             GActionGroup *group)
 566 {
 567   GtkWidget *w;
 568   gchar *label;
 569   gchar *action;
 570   gchar *target;
 571   gchar *s;
 572   ActionData *a;
 573   const GVariantType *type;
 574   GVariant *v;
 575
 576   label = NULL;
 577   g_menu_model_get_item_attribute (model, item, G_MENU_ATTRIBUTE_LABEL, "s", &label);
 578
 579   action = NULL;
 580   g_menu_model_get_item_attribute (model, item, G_MENU_ATTRIBUTE_ACTION, "s", &action);
 581
 582   if (action != NULL)
 583     type = g_action_group_get_action_state_type (group, action);
 584   else
 585     type = NULL;
 586
 587   if (type == NULL)
 588     w = gtk_menu_item_new_with_mnemonic (label);
 589   else if (g_variant_type_equal (type, G_VARIANT_TYPE_BOOLEAN))
 590     w = gtk_check_menu_item_new_with_label (label);
 591   else if (g_variant_type_equal (type, G_VARIANT_TYPE_STRING))
 592     {
 593       w = gtk_check_menu_item_new_with_label (label);
 594       gtk_check_menu_item_set_draw_as_radio (GTK_CHECK_MENU_ITEM (w), TRUE);
 595     }
 596   else
 597     g_assert_not_reached ();
 598
 599   if (action != NULL)
 600     {
 601       a = g_new0 (ActionData, 1);
 602       a->group = g_object_ref (group);
 603       a->name = g_strdup (action);
 604       g_object_set_data_full (G_OBJECT (w), "action", a, action_data_free);
 605
 606       if (!g_action_group_get_action_enabled (group, action))
 607         gtk_widget_set_sensitive (w, FALSE);
 608
 609       s = g_strconcat ("action-enabled-changed::", action, NULL);
 610       a->enabled_changed_id = g_signal_connect (group, s,
 611                                                 G_CALLBACK (enabled_changed), w);
 612       g_free (s);
 613       a->activate_handler = g_signal_connect (w, "activate",
 614                                               G_CALLBACK (item_activated), NULL);
 615
 616       if (type == NULL)
 617         {
 618           /* all set */
 619         }
 620       else if (g_variant_type_equal (type, G_VARIANT_TYPE_BOOLEAN))
 621         {
 622           s = g_strconcat ("action-state-changed::", action, NULL);
 623           a->state_changed_id = g_signal_connect (group, s,
 624                                                   G_CALLBACK (toggle_state_changed), w);
 625           g_free (s);
 626           v = g_action_group_get_action_state (group, action);
 627           gtk_check_menu_item_set_active (GTK_CHECK_MENU_ITEM (w),
 628                                           g_variant_get_boolean (v));
 629           g_variant_unref (v);
 630         }
 631       else if (g_variant_type_equal (type, G_VARIANT_TYPE_STRING))
 632         {
 633           s = g_strconcat ("action-state-changed::", action, NULL);
 634           a->state_changed_id = g_signal_connect (group, s,
 635                                                   G_CALLBACK (radio_state_changed), w);
 636           g_free (s);
 637           g_menu_model_get_item_attribute (model, item, G_MENU_ATTRIBUTE_TARGET, "s", &target);
 638           a->target = g_strdup (target);
 639           v = g_action_group_get_action_state (group, action);
 640           gtk_check_menu_item_set_active (GTK_CHECK_MENU_ITEM (w),
 641                                           g_strcmp0 (g_variant_get_string (v, NULL), target) == 0);
 642           g_variant_unref (v);
 643           g_free (target);
 644         }
 645       else
 646         g_assert_not_reached ();
 647     }
 648
 649   g_free (label);
 650   g_free (action);
 651
 652   return w;
 653 }
 654
 655 static void populate_menu_from_model (GtkMenuShell *menu,
 656                                       GMenuModel   *model,
 657                                       GActionGroup *group);
 658
 659 static void
 660 append_items_from_model (GtkMenuShell *menu,
 661                          GMenuModel   *model,
 662                          GActionGroup *group,
 663                          gboolean     *need_separator,
 664                          const gchar  *heading)
 665 {
 666   gint n;
 667   gint i;
 668   GtkWidget *w;
 669   GtkWidget *menuitem;
 670   GtkWidget *submenu;
 671   GMenuModel *m;
 672   gchar *label;
 673
 674   n = g_menu_model_get_n_items (model);
 675
 676   if (*need_separator && n > 0)
 677     {
 678       w = gtk_separator_menu_item_new ();
 679       gtk_widget_show (w);
 680       gtk_menu_shell_append (menu, w);
 681       *need_separator = FALSE;
 682     }
 683
 684   if (heading != NULL)
 685     {
 686       w = gtk_menu_item_new_with_label (heading);
 687       gtk_widget_show (w);
 688       gtk_widget_set_sensitive (w, FALSE);
 689       gtk_menu_shell_append (GTK_MENU_SHELL (menu), w);
 690     }
 691
 692   for (i = 0; i < n; i++)
 693     {
 694       if ((m = g_menu_model_get_item_link (model, i, G_MENU_LINK_SECTION)))
 695         {
 696           label = NULL;
 697           g_menu_model_get_item_attribute (model, i, G_MENU_ATTRIBUTE_LABEL, "s", &label);
 698           append_items_from_model (menu, m, group, need_separator, label);
 699           g_object_unref (m);
 700           g_free (label);
 701           continue;
 702         }
 703
 704       if (*need_separator)
 705         {
 706           w = gtk_separator_menu_item_new ();
 707           gtk_widget_show (w);
 708           gtk_menu_shell_append (menu, w);
 709           *need_separator = FALSE;
 710         }
 711
 712       menuitem = create_menuitem_from_model (model, i, group);
 713
 714       if ((m = g_menu_model_get_item_link (model, i, G_MENU_LINK_SUBMENU)))
 715         {
 716           submenu = gtk_menu_new ();
 717           populate_menu_from_model (GTK_MENU_SHELL (submenu), m, group);
 718           gtk_menu_item_set_submenu (GTK_MENU_ITEM (menuitem), submenu);
 719           g_object_unref (m);
 720         }
 721
 722       gtk_widget_show (menuitem);
 723       gtk_menu_shell_append (menu, menuitem);
 724
 725       *need_separator = TRUE;
 726     }
 727 }
 728
 729 static void
 730 populate_menu_from_model (GtkMenuShell *menu,
 731                           GMenuModel   *model,
 732                           GActionGroup *group)
 733 {
 734   gboolean need_separator;
 735
 736   need_separator = FALSE;
 737   append_items_from_model (menu, model, group, &need_separator, NULL);
 738 }
 739
 740 typedef struct {
 741   GtkApplication *application;
 742   GtkMenuShell   *menu;
 743   guint           update_idle;
 744   GHashTable     *connected;
 745 } ItemsChangedData;
 746
 747 static void
 748 free_items_changed_data (gpointer data)
 749 {
 750   ItemsChangedData *d = data;
 751
 752   g_object_unref (d->application);
 753
 754   if (d->update_idle != 0)
 755     g_source_remove (d->update_idle);
 756
 757   g_hash_table_unref (d->connected);
 758
 759   g_free (d);
 760 }
 761
 762 static gboolean
 763 repopulate_menu (gpointer data)
 764 {
 765   ItemsChangedData *d = data;
 766   GList *children, *l;
 767   GtkWidget *child;
 768   GMenuModel *model;
 769
 770   /* remove current children */
 771   children = gtk_container_get_children (GTK_CONTAINER (d->menu));
 772   for (l = children; l; l = l->next)
 773     {
 774       child = l->data;
 775       gtk_container_remove (GTK_CONTAINER (d->menu), child);
 776     }
 777   g_list_free (children);
 778
 779   /* repopulate */
 780   model = g_application_get_menu (G_APPLICATION (d->application));
 781   populate_menu_from_model (d->menu, model, G_ACTION_GROUP (d->application));
 782
 783   d->update_idle = 0;
 784
 785   return FALSE;
 786 }
 787
 788 static void
 789 connect_to_items_changed (GMenuModel *model,
 790                           GCallback   callback,
 791                           gpointer    data)
 792 {
 793   ItemsChangedData *d = data;
 794   gint i;
 795   GMenuModel *m;
 796   GMenuLinkIter *iter;
 797
 798   if (!g_hash_table_lookup (d->connected, model))
 799     {
 800       g_signal_connect (model, "items-changed", callback, data);
 801       g_hash_table_insert (d->connected, model, model);
 802     }
 803
 804   for (i = 0; i < g_menu_model_get_n_items (model); i++)
 805     {
 806       iter = g_menu_model_iterate_item_links (model, i);
 807       while (g_menu_link_iter_next (iter))
 808         {
 809           m = g_menu_link_iter_get_value (iter);
 810           connect_to_items_changed (m, callback, data);
 811           g_object_unref (m);
 812         }
 813       g_object_unref (iter);
 814     }
 815 }
 816
 817 static void
 818 items_changed (GMenuModel *model,
 819                gint        position,
 820                gint        removed,
 821                gint        added,
 822                gpointer    data)
 823 {
 824   ItemsChangedData *d = data;
 825
 826   if (d->update_idle == 0)
 827     d->update_idle = gdk_threads_add_idle (repopulate_menu, data);
 828   connect_to_items_changed (model, G_CALLBACK (items_changed), data);
 829 }
 830
 831 /**
 832  * gtk_application_window_get_app_menu:
 833  * @application: a #GtkApplication
 834  *
 835  * Populates a menu widget from a menu model that is
 836  * associated with @application. See g_application_set_menu().
 837  * The menu items will be connected to action of @application,
 838  * as indicated by the menu model. The menus contents will be
 839  * updated automatically in response to menu model changes.
 840  *
 841  * It is the callers responsibility to add the menu at a
 842  * suitable place in the widget hierarchy.
 843  *
 844  * This function returns %NULL if @application has no associated
 845  * menu model. It also returns %NULL if the menu model is
 846  * represented outside the application, e.g. by an application
 847  * menu in the desktop shell.
 848  *
 849  * @menu may be a #GtkMenu or a #GtkMenuBar.
 850  *
 851  * Returns: A #GtkMenu that has been populated from the
 852  *     #GMenuModel that is associated with @application,
 853  *     or %NULL
 854  */
 855 GtkWidget *
 856 gtk_application_window_get_app_menu (GtkApplicationWindow *window)
 857 {
 858   GtkApplication *application;
 859   GtkWidget *menu;
 860   GMenuModel *model;
 861   ItemsChangedData *data;
 862   GActionMuxer *muxer;
 863
 864   application = gtk_window_get_application (GTK_WINDOW (window));
 865
 866   model = g_application_get_menu (G_APPLICATION (application));
 867
 868   if (!model)
 869     return NULL;
 870
 871   menu = gtk_menu_new ();
 872
 873   muxer = g_action_muxer_new ();
 874   g_action_muxer_insert (muxer, "app", G_ACTION_GROUP (application));
 875   g_action_muxer_insert (muxer, "win", G_ACTION_GROUP (window));
 876   populate_menu_from_model (GTK_MENU_SHELL (menu), model, G_ACTION_GROUP (muxer));
 877   g_object_unref (muxer);
 878
 879   data = g_new (ItemsChangedData, 1);
 880   data->application = g_object_ref (application);
 881   data->menu = GTK_MENU_SHELL (menu);
 882   data->update_idle = 0;
 883   data->connected = g_hash_table_new (NULL, NULL);
 884
 885   g_object_set_data_full (G_OBJECT (menu), "gtk-application-menu-data",
 886                           data, free_items_changed_data);
 887
 888   connect_to_items_changed (model, G_CALLBACK (items_changed), data);
 889
 890   return menu;
 891 }