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 #include "gdk/gdkkeysyms.h"
  28 #include "gtkbindings.h"
  29 #include "gtkmain.h"
  30 #include "gtkmenubar.h"
  31 #include "gtkmenuitem.h"
  32 #include "gtksettings.h"
  33 #include "gtkintl.h"
  34 #include "gtkwindow.h"
  35 #include "gtksignal.h"
  36
  37
  38 #define BORDER_SPACING  0
  39 #define CHILD_SPACING   3
  40 #define DEFAULT_IPADDING 1
  41
  42 static void gtk_menu_bar_class_init    (GtkMenuBarClass *klass);
  43 static void gtk_menu_bar_size_request  (GtkWidget       *widget,
  44                                         GtkRequisition  *requisition);
  45 static void gtk_menu_bar_size_allocate (GtkWidget       *widget,
  46                                         GtkAllocation   *allocation);
  47 static void gtk_menu_bar_paint         (GtkWidget       *widget,
  48                                         GdkRectangle    *area);
  49 static gint gtk_menu_bar_expose        (GtkWidget       *widget,
  50                                         GdkEventExpose  *event);
  51 static void gtk_menu_bar_hierarchy_changed (GtkWidget   *widget);
  52 static GtkShadowType get_shadow_type   (GtkMenuBar      *menubar);
  53
  54 static GtkMenuShellClass *parent_class = NULL;
  55
  56 GtkType
  57 gtk_menu_bar_get_type (void)
  58 {
  59   static GtkType menu_bar_type = 0;
  60
  61   if (!menu_bar_type)
  62     {
  63       static const GtkTypeInfo menu_bar_info =
  64       {
  65         "GtkMenuBar",
  66         sizeof (GtkMenuBar),
  67         sizeof (GtkMenuBarClass),
  68         (GtkClassInitFunc) gtk_menu_bar_class_init,
  69         (GtkObjectInitFunc) NULL,
  70         /* reserved_1 */ NULL,
  71         /* reserved_2 */ NULL,
  72         (GtkClassInitFunc) NULL,
  73       };
  74
  75       menu_bar_type = gtk_type_unique (gtk_menu_shell_get_type (), &menu_bar_info);
  76     }
  77
  78   return menu_bar_type;
  79 }
  80
  81 static void
  82 gtk_menu_bar_class_init (GtkMenuBarClass *class)
  83 {
  84   GtkObjectClass *object_class;
  85   GtkWidgetClass *widget_class;
  86   GtkMenuShellClass *menu_shell_class;
  87
  88   GtkBindingSet *binding_set;
  89
  90   parent_class = g_type_class_peek_parent (class);
  91
  92   object_class = (GtkObjectClass*) class;
  93   widget_class = (GtkWidgetClass*) class;
  94   menu_shell_class = (GtkMenuShellClass*) class;
  95
  96   widget_class->size_request = gtk_menu_bar_size_request;
  97   widget_class->size_allocate = gtk_menu_bar_size_allocate;
  98   widget_class->expose_event = gtk_menu_bar_expose;
  99   widget_class->hierarchy_changed = gtk_menu_bar_hierarchy_changed;
 100
 101   menu_shell_class->submenu_placement = GTK_TOP_BOTTOM;
 102
 103   binding_set = gtk_binding_set_by_class (class);
 104   gtk_binding_entry_add_signal (binding_set,
 105                                 GDK_Left, 0,
 106                                 "move_current", 1,
 107                                 GTK_TYPE_MENU_DIRECTION_TYPE,
 108                                 GTK_MENU_DIR_PREV);
 109   gtk_binding_entry_add_signal (binding_set,
 110                                 GDK_KP_Left, 0,
 111                                 "move_current", 1,
 112                                 GTK_TYPE_MENU_DIRECTION_TYPE,
 113                                 GTK_MENU_DIR_PREV);
 114   gtk_binding_entry_add_signal (binding_set,
 115                                 GDK_Right, 0,
 116                                 "move_current", 1,
 117                                 GTK_TYPE_MENU_DIRECTION_TYPE,
 118                                 GTK_MENU_DIR_NEXT);
 119   gtk_binding_entry_add_signal (binding_set,
 120                                 GDK_KP_Right, 0,
 121                                 "move_current", 1,
 122                                 GTK_TYPE_MENU_DIRECTION_TYPE,
 123                                 GTK_MENU_DIR_NEXT);
 124   gtk_binding_entry_add_signal (binding_set,
 125                                 GDK_Up, 0,
 126                                 "move_current", 1,
 127                                 GTK_TYPE_MENU_DIRECTION_TYPE,
 128                                 GTK_MENU_DIR_PARENT);
 129   gtk_binding_entry_add_signal (binding_set,
 130                                 GDK_KP_Up, 0,
 131                                 "move_current", 1,
 132                                 GTK_TYPE_MENU_DIRECTION_TYPE,
 133                                 GTK_MENU_DIR_PARENT);
 134   gtk_binding_entry_add_signal (binding_set,
 135                                 GDK_Down, 0,
 136                                 "move_current", 1,
 137                                 GTK_TYPE_MENU_DIRECTION_TYPE,
 138                                 GTK_MENU_DIR_CHILD);
 139   gtk_binding_entry_add_signal (binding_set,
 140                                 GDK_KP_Down, 0,
 141                                 "move_current", 1,
 142                                 GTK_TYPE_MENU_DIRECTION_TYPE,
 143                                 GTK_MENU_DIR_CHILD);
 144
 145   gtk_settings_install_property (gtk_settings_get_global (),
 146                                  g_param_spec_string ("gtk-menu-bar-accel",
 147                                                       _("Menu bar accelerator"),
 148                                                       _("Keybinding to activate the menu bar"),
 149                                                       "F10",
 150                                                       G_PARAM_READWRITE));
 151
 152   gtk_widget_class_install_style_property (widget_class,
 153                                            g_param_spec_enum ("shadow_type",
 154                                                               _("Shadow type"),
 155                                                               _("Style of bevel around the menubar"),
 156                                                               GTK_TYPE_SHADOW_TYPE,
 157                                                               GTK_SHADOW_OUT,
 158                                                               G_PARAM_READABLE));
 159
 160   gtk_widget_class_install_style_property (widget_class,
 161                                            g_param_spec_int ("internal_padding",
 162                                                              _("Internal padding"),
 163                                                              _("Amount of border space between the menubar shadow and the menu items"),
 164                                                              0,
 165                                                              G_MAXINT,
 166                                                              DEFAULT_IPADDING,
 167                                                              G_PARAM_READABLE));
 168
 169 }
 170
 171 GtkWidget*
 172 gtk_menu_bar_new (void)
 173 {
 174   return GTK_WIDGET (gtk_type_new (gtk_menu_bar_get_type ()));
 175 }
 176
 177 void
 178 gtk_menu_bar_append (GtkMenuBar *menu_bar,
 179                      GtkWidget  *child)
 180 {
 181   gtk_menu_shell_append (GTK_MENU_SHELL (menu_bar), child);
 182 }
 183
 184 void
 185 gtk_menu_bar_prepend (GtkMenuBar *menu_bar,
 186                       GtkWidget  *child)
 187 {
 188   gtk_menu_shell_prepend (GTK_MENU_SHELL (menu_bar), child);
 189 }
 190
 191 void
 192 gtk_menu_bar_insert (GtkMenuBar *menu_bar,
 193                      GtkWidget  *child,
 194                      gint        position)
 195 {
 196   gtk_menu_shell_insert (GTK_MENU_SHELL (menu_bar), child, position);
 197 }
 198
 199
 200 static void
 201 gtk_menu_bar_size_request (GtkWidget      *widget,
 202                            GtkRequisition *requisition)
 203 {
 204   GtkMenuBar *menu_bar;
 205   GtkMenuShell *menu_shell;
 206   GtkWidget *child;
 207   GList *children;
 208   gint nchildren;
 209   GtkRequisition child_requisition;
 210   gint ipadding;
 211
 212   g_return_if_fail (widget != NULL);
 213   g_return_if_fail (GTK_IS_MENU_BAR (widget));
 214   g_return_if_fail (requisition != NULL);
 215
 216   requisition->width = 0;
 217   requisition->height = 0;
 218
 219   if (GTK_WIDGET_VISIBLE (widget))
 220     {
 221       menu_bar = GTK_MENU_BAR (widget);
 222       menu_shell = GTK_MENU_SHELL (widget);
 223
 224       nchildren = 0;
 225       children = menu_shell->children;
 226
 227       while (children)
 228         {
 229           child = children->data;
 230           children = children->next;
 231
 232           if (GTK_WIDGET_VISIBLE (child))
 233             {
 234               gint toggle_size;
 235
 236               GTK_MENU_ITEM (child)->show_submenu_indicator = FALSE;
 237               gtk_widget_size_request (child, &child_requisition);
 238               gtk_menu_item_toggle_size_request (GTK_MENU_ITEM (child),
 239                                                  &toggle_size);
 240
 241               requisition->width += child_requisition.width;
 242               requisition->width += toggle_size;
 243
 244               requisition->height = MAX (requisition->height, child_requisition.height);
 245               /* Support for the right justified help menu */
 246               if ((children == NULL) && GTK_IS_MENU_ITEM(child) &&
 247                   GTK_MENU_ITEM(child)->right_justify)
 248                 {
 249                   requisition->width += CHILD_SPACING;
 250                 }
 251
 252               nchildren += 1;
 253             }
 254         }
 255
 256       gtk_widget_style_get (widget, "internal_padding", &ipadding, NULL);
 257
 258       requisition->width += (GTK_CONTAINER (menu_bar)->border_width +
 259                              widget->style->xthickness +
 260                              ipadding +
 261                              BORDER_SPACING) * 2;
 262       requisition->height += (GTK_CONTAINER (menu_bar)->border_width +
 263                               widget->style->ythickness +
 264                               ipadding +
 265                               BORDER_SPACING) * 2;
 266
 267       if (nchildren > 0)
 268         requisition->width += 2 * CHILD_SPACING * (nchildren - 1);
 269     }
 270 }
 271
 272 static void
 273 gtk_menu_bar_size_allocate (GtkWidget     *widget,
 274                             GtkAllocation *allocation)
 275 {
 276   GtkMenuBar *menu_bar;
 277   GtkMenuShell *menu_shell;
 278   GtkWidget *child;
 279   GList *children;
 280   GtkAllocation child_allocation;
 281   GtkRequisition child_requisition;
 282   guint offset;
 283   gint ipadding;
 284
 285   g_return_if_fail (widget != NULL);
 286   g_return_if_fail (GTK_IS_MENU_BAR (widget));
 287   g_return_if_fail (allocation != NULL);
 288
 289   menu_bar = GTK_MENU_BAR (widget);
 290   menu_shell = GTK_MENU_SHELL (widget);
 291
 292   widget->allocation = *allocation;
 293   if (GTK_WIDGET_REALIZED (widget))
 294     gdk_window_move_resize (widget->window,
 295                             allocation->x, allocation->y,
 296                             allocation->width, allocation->height);
 297
 298   gtk_widget_style_get (widget, "internal_padding", &ipadding, NULL);
 299
 300   if (menu_shell->children)
 301     {
 302       child_allocation.x = (GTK_CONTAINER (menu_bar)->border_width +
 303                             widget->style->xthickness +
 304                             ipadding +
 305                             BORDER_SPACING);
 306       offset = child_allocation.x;      /* Window edge to menubar start */
 307
 308       child_allocation.y = (GTK_CONTAINER (menu_bar)->border_width +
 309                             widget->style->ythickness +
 310                             ipadding +
 311                             BORDER_SPACING);
 312       child_allocation.height = MAX (1, (gint)allocation->height - child_allocation.y * 2);
 313
 314       children = menu_shell->children;
 315       while (children)
 316         {
 317           gint toggle_size;
 318
 319           child = children->data;
 320           children = children->next;
 321
 322           gtk_menu_item_toggle_size_request (GTK_MENU_ITEM (child),
 323                                              &toggle_size);
 324           gtk_widget_get_child_requisition (child, &child_requisition);
 325
 326           child_requisition.width += toggle_size;
 327
 328           /* Support for the right justified help menu */
 329           if ( (children == NULL) && (GTK_IS_MENU_ITEM(child))
 330               && (GTK_MENU_ITEM(child)->right_justify))
 331             {
 332               child_allocation.x = allocation->width -
 333                   child_requisition.width - CHILD_SPACING - offset;
 334             }
 335           if (GTK_WIDGET_VISIBLE (child))
 336             {
 337               child_allocation.width = child_requisition.width;
 338
 339               gtk_menu_item_toggle_size_allocate (GTK_MENU_ITEM (child),
 340                                                   toggle_size);
 341               gtk_widget_size_allocate (child, &child_allocation);
 342
 343               child_allocation.x += child_allocation.width + CHILD_SPACING * 2;
 344             }
 345         }
 346     }
 347 }
 348
 349 static void
 350 gtk_menu_bar_paint (GtkWidget *widget, GdkRectangle *area)
 351 {
 352   g_return_if_fail (widget != NULL);
 353   g_return_if_fail (GTK_IS_MENU_BAR (widget));
 354
 355   if (GTK_WIDGET_DRAWABLE (widget))
 356     {
 357       gint border;
 358
 359       border = GTK_CONTAINER (widget)->border_width;
 360
 361       gtk_paint_box (widget->style,
 362                      widget->window,
 363                      GTK_WIDGET_STATE (widget),
 364                      get_shadow_type (GTK_MENU_BAR (widget)),
 365                      area, widget, "menubar",
 366                      border, border,
 367                      widget->allocation.width - border * 2,
 368                      widget->allocation.height - border * 2);
 369     }
 370 }
 371
 372 static gint
 373 gtk_menu_bar_expose (GtkWidget      *widget,
 374                      GdkEventExpose *event)
 375 {
 376   g_return_val_if_fail (widget != NULL, FALSE);
 377   g_return_val_if_fail (GTK_IS_MENU_BAR (widget), FALSE);
 378   g_return_val_if_fail (event != NULL, FALSE);
 379
 380   if (GTK_WIDGET_DRAWABLE (widget))
 381     {
 382       gtk_menu_bar_paint (widget, &event->area);
 383
 384       (* GTK_WIDGET_CLASS (parent_class)->expose_event) (widget, event);
 385     }
 386
 387   return FALSE;
 388 }
 389
 390 static gboolean
 391 window_key_press_handler (GtkWidget   *widget,
 392                           GdkEventKey *event,
 393                           gpointer     data)
 394 {
 395   gchar *accel = NULL;
 396   gboolean retval = FALSE;
 397
 398   g_object_get (G_OBJECT (gtk_settings_get_global ()),
 399                 "gtk-menu-bar-accel",
 400                 &accel,
 401                 NULL);
 402
 403   if (accel)
 404     {
 405       guint keyval = 0;
 406       GdkModifierType mods = 0;
 407
 408       gtk_accelerator_parse (accel, &keyval, &mods);
 409
 410       if (keyval == 0)
 411         g_warning ("Failed to parse menu bar accelerator '%s'\n", accel);
 412
 413       /* FIXME this is wrong, needs to be in the global accel resolution
 414        * thing, to properly consider i18n etc., but that probably requires
 415        * AccelGroup changes etc.
 416        */
 417       if (event->keyval == keyval &&
 418           (mods & event->state) == mods)
 419         {
 420           GtkMenuBar *menubar;
 421           GtkMenuShell *menushell;
 422
 423           menubar = GTK_MENU_BAR (data);
 424           menushell = GTK_MENU_SHELL (menubar);
 425
 426           if (menushell->children)
 427             {
 428               gtk_signal_emit_by_name (GTK_OBJECT (menushell->children->data),
 429                                        "activate_item");
 430
 431               retval = TRUE;
 432             }
 433         }
 434
 435       g_free (accel);
 436     }
 437
 438   return retval;
 439 }
 440
 441 static void
 442 add_to_window (GtkWindow  *window,
 443                GtkMenuBar *menubar)
 444 {
 445   GtkMenuBar *old_menubar;
 446
 447   old_menubar = g_object_get_data (G_OBJECT (window),
 448                                    "gtk-menu-bar");
 449
 450   if (old_menubar)
 451     return; /* ignore this case; app programmer on crack, but
 452              * shouldn't spew stuff, just don't support the accel
 453              * for menubar #2
 454              */
 455
 456   g_object_set_data (G_OBJECT (window),
 457                      "gtk-menu-bar",
 458                      menubar);
 459
 460   g_signal_connect (G_OBJECT (window),
 461                     "key_press_event",
 462                     G_CALLBACK (window_key_press_handler),
 463                     menubar);
 464
 465   menubar->toplevel = GTK_WIDGET (window);
 466 }
 467
 468 static void
 469 remove_from_window (GtkWindow  *window,
 470                     GtkMenuBar *menubar)
 471 {
 472   g_return_if_fail (menubar->toplevel == GTK_WIDGET (window));
 473
 474   g_signal_handlers_disconnect_by_func (G_OBJECT (window),
 475                                         G_CALLBACK (window_key_press_handler),
 476                                         menubar);
 477
 478   /* dnotify zeroes menubar->toplevel */
 479   g_object_set_data (G_OBJECT (window),
 480                      "gtk-menu-bar",
 481                      NULL);
 482
 483   menubar->toplevel = NULL;
 484 }
 485
 486 static void
 487 gtk_menu_bar_hierarchy_changed (GtkWidget *widget)
 488 {
 489   GtkWidget *toplevel;
 490   GtkMenuBar *menubar;
 491
 492   menubar = GTK_MENU_BAR (widget);
 493
 494   toplevel = gtk_widget_get_toplevel (widget);
 495
 496   if (menubar->toplevel &&
 497       toplevel != menubar->toplevel)
 498     {
 499       remove_from_window (GTK_WINDOW (menubar->toplevel),
 500                           menubar);
 501     }
 502
 503   if (toplevel &&
 504       GTK_IS_WINDOW (toplevel))
 505     {
 506       add_to_window (GTK_WINDOW (toplevel),
 507                      menubar);
 508     }
 509 }
 510
 511 static GtkShadowType
 512 get_shadow_type (GtkMenuBar *menubar)
 513 {
 514   GtkShadowType shadow_type = GTK_SHADOW_OUT;
 515
 516   gtk_widget_style_get (GTK_WIDGET (menubar),
 517                         "shadow_type", &shadow_type,
 518                         NULL);
 519
 520
 521   return shadow_type;
 522 }