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