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

   1 /* GTK - The GIMP Toolkit
   2  * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
   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 License, 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
  20 /*
  21  * Modified by the GTK+ Team and others 1997-2000.  See the AUTHORS
  22  * file for a list of people on the GTK+ Team.  See the ChangeLog
  23  * files for a list of changes.  These files are distributed with
  24  * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
  25  */
  26
  27 #define GTK_MENU_INTERNALS
  28
  29 #include "gdk/gdkkeysyms.h"
  30 #include "gtkbindings.h"
  31 #include "gtkmain.h"
  32 #include "gtkmarshalers.h"
  33 #include "gtkmenubar.h"
  34 #include "gtkmenuitem.h"
  35 #include "gtksettings.h"
  36 #include "gtkintl.h"
  37 #include "gtkwindow.h"
  38 #include "gtksignal.h"
  39
  40
  41 #define BORDER_SPACING  0
  42 #define CHILD_SPACING   3
  43 #define DEFAULT_IPADDING 1
  44
  45 static void gtk_menu_bar_class_init    (GtkMenuBarClass *klass);
  46 static void gtk_menu_bar_size_request  (GtkWidget       *widget,
  47                                         GtkRequisition  *requisition);
  48 static void gtk_menu_bar_size_allocate (GtkWidget       *widget,
  49                                         GtkAllocation   *allocation);
  50 static void gtk_menu_bar_paint         (GtkWidget       *widget,
  51                                         GdkRectangle    *area);
  52 static gint gtk_menu_bar_expose        (GtkWidget       *widget,
  53                                         GdkEventExpose  *event);
  54 static void gtk_menu_bar_hierarchy_changed (GtkWidget   *widget,
  55                                             GtkWidget   *old_toplevel);
  56 static GtkShadowType get_shadow_type   (GtkMenuBar      *menubar);
  57
  58 static GtkMenuShellClass *parent_class = NULL;
  59
  60 GtkType
  61 gtk_menu_bar_get_type (void)
  62 {
  63   static GtkType menu_bar_type = 0;
  64
  65   if (!menu_bar_type)
  66     {
  67       static const GtkTypeInfo menu_bar_info =
  68       {
  69         "GtkMenuBar",
  70         sizeof (GtkMenuBar),
  71         sizeof (GtkMenuBarClass),
  72         (GtkClassInitFunc) gtk_menu_bar_class_init,
  73         (GtkObjectInitFunc) NULL,
  74         /* reserved_1 */ NULL,
  75         /* reserved_2 */ NULL,
  76         (GtkClassInitFunc) NULL,
  77       };
  78
  79       menu_bar_type = gtk_type_unique (gtk_menu_shell_get_type (), &menu_bar_info);
  80     }
  81
  82   return menu_bar_type;
  83 }
  84
  85 static void
  86 gtk_menu_bar_class_init (GtkMenuBarClass *class)
  87 {
  88   GtkObjectClass *object_class;
  89   GtkWidgetClass *widget_class;
  90   GtkMenuShellClass *menu_shell_class;
  91
  92   GtkBindingSet *binding_set;
  93
  94   parent_class = g_type_class_peek_parent (class);
  95
  96   object_class = (GtkObjectClass*) class;
  97   widget_class = (GtkWidgetClass*) class;
  98   menu_shell_class = (GtkMenuShellClass*) class;
  99
 100   widget_class->size_request = gtk_menu_bar_size_request;
 101   widget_class->size_allocate = gtk_menu_bar_size_allocate;
 102   widget_class->expose_event = gtk_menu_bar_expose;
 103   widget_class->hierarchy_changed = gtk_menu_bar_hierarchy_changed;
 104
 105   menu_shell_class->submenu_placement = GTK_TOP_BOTTOM;
 106
 107   binding_set = gtk_binding_set_by_class (class);
 108   gtk_binding_entry_add_signal (binding_set,
 109                                 GDK_Left, 0,
 110                                 "move_current", 1,
 111                                 GTK_TYPE_MENU_DIRECTION_TYPE,
 112                                 GTK_MENU_DIR_PREV);
 113   gtk_binding_entry_add_signal (binding_set,
 114                                 GDK_KP_Left, 0,
 115                                 "move_current", 1,
 116                                 GTK_TYPE_MENU_DIRECTION_TYPE,
 117                                 GTK_MENU_DIR_PREV);
 118   gtk_binding_entry_add_signal (binding_set,
 119                                 GDK_Right, 0,
 120                                 "move_current", 1,
 121                                 GTK_TYPE_MENU_DIRECTION_TYPE,
 122                                 GTK_MENU_DIR_NEXT);
 123   gtk_binding_entry_add_signal (binding_set,
 124                                 GDK_KP_Right, 0,
 125                                 "move_current", 1,
 126                                 GTK_TYPE_MENU_DIRECTION_TYPE,
 127                                 GTK_MENU_DIR_NEXT);
 128   gtk_binding_entry_add_signal (binding_set,
 129                                 GDK_Up, 0,
 130                                 "move_current", 1,
 131                                 GTK_TYPE_MENU_DIRECTION_TYPE,
 132                                 GTK_MENU_DIR_PARENT);
 133   gtk_binding_entry_add_signal (binding_set,
 134                                 GDK_KP_Up, 0,
 135                                 "move_current", 1,
 136                                 GTK_TYPE_MENU_DIRECTION_TYPE,
 137                                 GTK_MENU_DIR_PARENT);
 138   gtk_binding_entry_add_signal (binding_set,
 139                                 GDK_Down, 0,
 140                                 "move_current", 1,
 141                                 GTK_TYPE_MENU_DIRECTION_TYPE,
 142                                 GTK_MENU_DIR_CHILD);
 143   gtk_binding_entry_add_signal (binding_set,
 144                                 GDK_KP_Down, 0,
 145                                 "move_current", 1,
 146                                 GTK_TYPE_MENU_DIRECTION_TYPE,
 147                                 GTK_MENU_DIR_CHILD);
 148
 149   gtk_widget_class_install_style_property (widget_class,
 150                                            g_param_spec_enum ("shadow_type",
 151                                                               _("Shadow type"),
 152                                                               _("Style of bevel around the menubar"),
 153                                                               GTK_TYPE_SHADOW_TYPE,
 154                                                               GTK_SHADOW_OUT,
 155                                                               G_PARAM_READABLE));
 156
 157   gtk_widget_class_install_style_property (widget_class,
 158                                            g_param_spec_int ("internal_padding",
 159                                                              _("Internal padding"),
 160                                                              _("Amount of border space between the menubar shadow and the menu items"),
 161                                                              0,
 162                                                              G_MAXINT,
 163                                                              DEFAULT_IPADDING,
 164                                                              G_PARAM_READABLE));
 165
 166 }
 167
 168 GtkWidget*
 169 gtk_menu_bar_new (void)
 170 {
 171   return GTK_WIDGET (gtk_type_new (gtk_menu_bar_get_type ()));
 172 }
 173
 174 static void
 175 gtk_menu_bar_size_request (GtkWidget      *widget,
 176                            GtkRequisition *requisition)
 177 {
 178   GtkMenuBar *menu_bar;
 179   GtkMenuShell *menu_shell;
 180   GtkWidget *child;
 181   GList *children;
 182   gint nchildren;
 183   GtkRequisition child_requisition;
 184   gint ipadding;
 185
 186   g_return_if_fail (GTK_IS_MENU_BAR (widget));
 187   g_return_if_fail (requisition != NULL);
 188
 189   requisition->width = 0;
 190   requisition->height = 0;
 191
 192   if (GTK_WIDGET_VISIBLE (widget))
 193     {
 194       menu_bar = GTK_MENU_BAR (widget);
 195       menu_shell = GTK_MENU_SHELL (widget);
 196
 197       nchildren = 0;
 198       children = menu_shell->children;
 199
 200       while (children)
 201         {
 202           child = children->data;
 203           children = children->next;
 204
 205           if (GTK_WIDGET_VISIBLE (child))
 206             {
 207               gint toggle_size;
 208
 209               GTK_MENU_ITEM (child)->show_submenu_indicator = FALSE;
 210               gtk_widget_size_request (child, &child_requisition);
 211               gtk_menu_item_toggle_size_request (GTK_MENU_ITEM (child),
 212                                                  &toggle_size);
 213
 214               requisition->width += child_requisition.width;
 215               requisition->width += toggle_size;
 216
 217               requisition->height = MAX (requisition->height, child_requisition.height);
 218               /* Support for the right justified help menu */
 219               if ((children == NULL) && GTK_IS_MENU_ITEM(child) &&
 220                   GTK_MENU_ITEM(child)->right_justify)
 221                 {
 222                   requisition->width += CHILD_SPACING;
 223                 }
 224
 225               nchildren += 1;
 226             }
 227         }
 228
 229       gtk_widget_style_get (widget, "internal_padding", &ipadding, NULL);
 230
 231       requisition->width += (GTK_CONTAINER (menu_bar)->border_width +
 232                              ipadding +
 233                              BORDER_SPACING) * 2;
 234       requisition->height += (GTK_CONTAINER (menu_bar)->border_width +
 235                               ipadding +
 236                               BORDER_SPACING) * 2;
 237
 238       if (get_shadow_type (menu_bar) != GTK_SHADOW_NONE)
 239         {
 240           requisition->width += widget->style->xthickness * 2;
 241           requisition->height += widget->style->ythickness * 2;
 242         }
 243
 244       if (nchildren > 0)
 245         requisition->width += 2 * CHILD_SPACING * (nchildren - 1);
 246     }
 247 }
 248
 249 static void
 250 gtk_menu_bar_size_allocate (GtkWidget     *widget,
 251                             GtkAllocation *allocation)
 252 {
 253   GtkMenuBar *menu_bar;
 254   GtkMenuShell *menu_shell;
 255   GtkWidget *child;
 256   GList *children;
 257   GtkAllocation child_allocation;
 258   GtkRequisition child_requisition;
 259   guint offset;
 260   gint ipadding;
 261
 262   g_return_if_fail (GTK_IS_MENU_BAR (widget));
 263   g_return_if_fail (allocation != NULL);
 264
 265   menu_bar = GTK_MENU_BAR (widget);
 266   menu_shell = GTK_MENU_SHELL (widget);
 267
 268   widget->allocation = *allocation;
 269   if (GTK_WIDGET_REALIZED (widget))
 270     gdk_window_move_resize (widget->window,
 271                             allocation->x, allocation->y,
 272                             allocation->width, allocation->height);
 273
 274   gtk_widget_style_get (widget, "internal_padding", &ipadding, NULL);
 275
 276   if (menu_shell->children)
 277     {
 278       child_allocation.x = (GTK_CONTAINER (menu_bar)->border_width +
 279                             ipadding +
 280                             BORDER_SPACING);
 281       child_allocation.y = (GTK_CONTAINER (menu_bar)->border_width +
 282                             ipadding +
 283                             BORDER_SPACING);
 284
 285       if (get_shadow_type (menu_bar) != GTK_SHADOW_NONE)
 286         {
 287           child_allocation.x += widget->style->xthickness;
 288           child_allocation.y += widget->style->ythickness;
 289         }
 290
 291       child_allocation.height = MAX (1, (gint)allocation->height - child_allocation.y * 2);
 292
 293       offset = child_allocation.x;      /* Window edge to menubar start */
 294
 295       children = menu_shell->children;
 296       while (children)
 297         {
 298           gint toggle_size;
 299
 300           child = children->data;
 301           children = children->next;
 302
 303           gtk_menu_item_toggle_size_request (GTK_MENU_ITEM (child),
 304                                              &toggle_size);
 305           gtk_widget_get_child_requisition (child, &child_requisition);
 306
 307           child_requisition.width += toggle_size;
 308
 309           /* Support for the right justified help menu */
 310           if ((children == NULL) && (GTK_IS_MENU_ITEM(child))
 311               && (GTK_MENU_ITEM(child)->right_justify))
 312             {
 313               child_allocation.x = allocation->width -
 314                   child_requisition.width - offset;
 315             }
 316           if (GTK_WIDGET_VISIBLE (child))
 317             {
 318               child_allocation.width = child_requisition.width;
 319
 320               gtk_menu_item_toggle_size_allocate (GTK_MENU_ITEM (child),
 321                                                   toggle_size);
 322               gtk_widget_size_allocate (child, &child_allocation);
 323
 324               child_allocation.x += child_allocation.width + CHILD_SPACING * 2;
 325             }
 326         }
 327     }
 328 }
 329
 330 static void
 331 gtk_menu_bar_paint (GtkWidget *widget, GdkRectangle *area)
 332 {
 333   g_return_if_fail (GTK_IS_MENU_BAR (widget));
 334
 335   if (GTK_WIDGET_DRAWABLE (widget))
 336     {
 337       gint border;
 338
 339       border = GTK_CONTAINER (widget)->border_width;
 340
 341       gtk_paint_box (widget->style,
 342                      widget->window,
 343                      GTK_WIDGET_STATE (widget),
 344                      get_shadow_type (GTK_MENU_BAR (widget)),
 345                      area, widget, "menubar",
 346                      border, border,
 347                      widget->allocation.width - border * 2,
 348                      widget->allocation.height - border * 2);
 349     }
 350 }
 351
 352 static gint
 353 gtk_menu_bar_expose (GtkWidget      *widget,
 354                      GdkEventExpose *event)
 355 {
 356   g_return_val_if_fail (GTK_IS_MENU_BAR (widget), FALSE);
 357   g_return_val_if_fail (event != NULL, FALSE);
 358
 359   if (GTK_WIDGET_DRAWABLE (widget))
 360     {
 361       gtk_menu_bar_paint (widget, &event->area);
 362
 363       (* GTK_WIDGET_CLASS (parent_class)->expose_event) (widget, event);
 364     }
 365
 366   return FALSE;
 367 }
 368
 369 static GList *
 370 get_menu_bars (GtkWindow *window)
 371 {
 372   return g_object_get_data (G_OBJECT (window), "gtk-menu-bar-list");
 373 }
 374
 375 static void
 376 set_menu_bars (GtkWindow *window,
 377                GList     *menubars)
 378 {
 379   g_object_set_data (G_OBJECT (window), "gtk-menu-bar-list", menubars);
 380 }
 381
 382 static gboolean
 383 window_key_press_handler (GtkWidget   *widget,
 384                           GdkEventKey *event,
 385                           gpointer     data)
 386 {
 387   gchar *accel = NULL;
 388   gboolean retval = FALSE;
 389
 390   g_object_get (G_OBJECT (gtk_widget_get_settings (widget)),
 391                 "gtk-menu-bar-accel",
 392                 &accel,
 393                 NULL);
 394
 395   if (accel)
 396     {
 397       guint keyval = 0;
 398       GdkModifierType mods = 0;
 399
 400       gtk_accelerator_parse (accel, &keyval, &mods);
 401
 402       if (keyval == 0)
 403         g_warning ("Failed to parse menu bar accelerator '%s'\n", accel);
 404
 405       /* FIXME this is wrong, needs to be in the global accel resolution
 406        * thing, to properly consider i18n etc., but that probably requires
 407        * AccelGroup changes etc.
 408        */
 409       if (event->keyval == keyval &&
 410           ((event->state & gtk_accelerator_get_default_mod_mask ()) ==
 411            (mods & gtk_accelerator_get_default_mod_mask ())))
 412         {
 413           GList *menubars = get_menu_bars (GTK_WINDOW (widget));
 414
 415           menubars = _gtk_container_focus_sort (GTK_CONTAINER (widget), menubars,
 416                                                 GTK_DIR_TAB_FORWARD, NULL);
 417           if (menubars)
 418             {
 419               GtkMenuShell *menu_shell = GTK_MENU_SHELL (menubars->data);
 420
 421               _gtk_menu_shell_activate (menu_shell);
 422               _gtk_menu_shell_select_first (menu_shell);
 423
 424               g_list_free (menubars);
 425
 426               retval = TRUE;
 427             }
 428         }
 429
 430       g_free (accel);
 431     }
 432
 433   return retval;
 434 }
 435
 436 static void
 437 add_to_window (GtkWindow  *window,
 438                GtkMenuBar *menubar)
 439 {
 440   GList *menubars = get_menu_bars (window);
 441
 442   if (!menubars)
 443     {
 444       g_signal_connect (G_OBJECT (window),
 445                         "key_press_event",
 446                         G_CALLBACK (window_key_press_handler),
 447                         NULL);
 448     }
 449
 450   set_menu_bars (window, g_list_prepend (menubars, menubar));
 451 }
 452
 453 static void
 454 remove_from_window (GtkWindow  *window,
 455                     GtkMenuBar *menubar)
 456 {
 457   GList *menubars = get_menu_bars (window);
 458
 459   menubars = g_object_get_data (G_OBJECT (window),
 460                                     "gtk-menu-bar-list");
 461
 462   menubars = g_list_remove (menubars, menubar);
 463
 464   if (!menubars)
 465     {
 466       g_signal_handlers_disconnect_by_func (G_OBJECT (window),
 467                                             (gpointer) window_key_press_handler,
 468                                             NULL);
 469     }
 470
 471   set_menu_bars (window, menubars);
 472 }
 473
 474 static void
 475 gtk_menu_bar_hierarchy_changed (GtkWidget *widget,
 476                                 GtkWidget *old_toplevel)
 477 {
 478   GtkWidget *toplevel;
 479   GtkMenuBar *menubar;
 480
 481   menubar = GTK_MENU_BAR (widget);
 482
 483   toplevel = gtk_widget_get_toplevel (widget);
 484
 485   if (old_toplevel)
 486     remove_from_window (GTK_WINDOW (old_toplevel), menubar);
 487
 488   if (GTK_WIDGET_TOPLEVEL (toplevel))
 489     add_to_window (GTK_WINDOW (toplevel), menubar);
 490 }
 491
 492 /**
 493  * _gtk_menu_bar_cycle_focus:
 494  * @menubar: a #GtkMenuBar
 495  * @dir: direction in which to cycle the focus
 496  *
 497  * Move the focus between menubars in the toplevel.
 498  **/
 499 void
 500 _gtk_menu_bar_cycle_focus (GtkMenuBar       *menubar,
 501                            GtkDirectionType  dir)
 502 {
 503   GtkWidget *toplevel = gtk_widget_get_toplevel (GTK_WIDGET (menubar));
 504
 505   if (GTK_WIDGET_TOPLEVEL (toplevel))
 506     {
 507       GList *menubars = get_menu_bars (GTK_WINDOW (toplevel));
 508       GList *current;
 509       GtkMenuBar *new;
 510
 511       menubars = _gtk_container_focus_sort (GTK_CONTAINER (toplevel), menubars,
 512                                             dir, GTK_WIDGET (menubar));
 513
 514       if (menubars)
 515         {
 516           current = g_list_find (menubars, menubar);
 517           if (current && current->next)
 518             new = current->next->data;
 519           else
 520             new = menubars->data;
 521
 522           if (new != menubar)
 523             {
 524               GtkMenuShell *new_menushell = GTK_MENU_SHELL (new);
 525
 526               if (new_menushell->children)
 527                 {
 528                   g_signal_emit_by_name (menubar, "cancel", 0);
 529                   gtk_signal_emit_by_name (GTK_OBJECT (new_menushell->children->data),
 530                                            "activate_item");
 531                 }
 532             }
 533         }
 534
 535       g_list_free (menubars);
 536     }
 537 }
 538
 539 static GtkShadowType
 540 get_shadow_type (GtkMenuBar *menubar)
 541 {
 542   GtkShadowType shadow_type = GTK_SHADOW_OUT;
 543
 544   gtk_widget_style_get (GTK_WIDGET (menubar),
 545                         "shadow_type", &shadow_type,
 546                         NULL);
 547
 548
 549   return shadow_type;
 550 }