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                                             GtkWidget   *old_toplevel);
  53 static GtkShadowType get_shadow_type   (GtkMenuBar      *menubar);
  54
  55 static GtkMenuShellClass *parent_class = NULL;
  56
  57 GtkType
  58 gtk_menu_bar_get_type (void)
  59 {
  60   static GtkType menu_bar_type = 0;
  61
  62   if (!menu_bar_type)
  63     {
  64       static const GtkTypeInfo menu_bar_info =
  65       {
  66         "GtkMenuBar",
  67         sizeof (GtkMenuBar),
  68         sizeof (GtkMenuBarClass),
  69         (GtkClassInitFunc) gtk_menu_bar_class_init,
  70         (GtkObjectInitFunc) NULL,
  71         /* reserved_1 */ NULL,
  72         /* reserved_2 */ NULL,
  73         (GtkClassInitFunc) NULL,
  74       };
  75
  76       menu_bar_type = gtk_type_unique (gtk_menu_shell_get_type (), &menu_bar_info);
  77     }
  78
  79   return menu_bar_type;
  80 }
  81
  82 static void
  83 gtk_menu_bar_class_init (GtkMenuBarClass *class)
  84 {
  85   GtkObjectClass *object_class;
  86   GtkWidgetClass *widget_class;
  87   GtkMenuShellClass *menu_shell_class;
  88
  89   GtkBindingSet *binding_set;
  90
  91   parent_class = g_type_class_peek_parent (class);
  92
  93   object_class = (GtkObjectClass*) class;
  94   widget_class = (GtkWidgetClass*) class;
  95   menu_shell_class = (GtkMenuShellClass*) class;
  96
  97   widget_class->size_request = gtk_menu_bar_size_request;
  98   widget_class->size_allocate = gtk_menu_bar_size_allocate;
  99   widget_class->expose_event = gtk_menu_bar_expose;
 100   widget_class->hierarchy_changed = gtk_menu_bar_hierarchy_changed;
 101
 102   menu_shell_class->submenu_placement = GTK_TOP_BOTTOM;
 103
 104   binding_set = gtk_binding_set_by_class (class);
 105   gtk_binding_entry_add_signal (binding_set,
 106                                 GDK_Left, 0,
 107                                 "move_current", 1,
 108                                 GTK_TYPE_MENU_DIRECTION_TYPE,
 109                                 GTK_MENU_DIR_PREV);
 110   gtk_binding_entry_add_signal (binding_set,
 111                                 GDK_KP_Left, 0,
 112                                 "move_current", 1,
 113                                 GTK_TYPE_MENU_DIRECTION_TYPE,
 114                                 GTK_MENU_DIR_PREV);
 115   gtk_binding_entry_add_signal (binding_set,
 116                                 GDK_Right, 0,
 117                                 "move_current", 1,
 118                                 GTK_TYPE_MENU_DIRECTION_TYPE,
 119                                 GTK_MENU_DIR_NEXT);
 120   gtk_binding_entry_add_signal (binding_set,
 121                                 GDK_KP_Right, 0,
 122                                 "move_current", 1,
 123                                 GTK_TYPE_MENU_DIRECTION_TYPE,
 124                                 GTK_MENU_DIR_NEXT);
 125   gtk_binding_entry_add_signal (binding_set,
 126                                 GDK_Up, 0,
 127                                 "move_current", 1,
 128                                 GTK_TYPE_MENU_DIRECTION_TYPE,
 129                                 GTK_MENU_DIR_PARENT);
 130   gtk_binding_entry_add_signal (binding_set,
 131                                 GDK_KP_Up, 0,
 132                                 "move_current", 1,
 133                                 GTK_TYPE_MENU_DIRECTION_TYPE,
 134                                 GTK_MENU_DIR_PARENT);
 135   gtk_binding_entry_add_signal (binding_set,
 136                                 GDK_Down, 0,
 137                                 "move_current", 1,
 138                                 GTK_TYPE_MENU_DIRECTION_TYPE,
 139                                 GTK_MENU_DIR_CHILD);
 140   gtk_binding_entry_add_signal (binding_set,
 141                                 GDK_KP_Down, 0,
 142                                 "move_current", 1,
 143                                 GTK_TYPE_MENU_DIRECTION_TYPE,
 144                                 GTK_MENU_DIR_CHILD);
 145
 146   gtk_settings_install_property (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 (GTK_IS_MENU_BAR (widget));
 213   g_return_if_fail (requisition != NULL);
 214
 215   requisition->width = 0;
 216   requisition->height = 0;
 217
 218   if (GTK_WIDGET_VISIBLE (widget))
 219     {
 220       menu_bar = GTK_MENU_BAR (widget);
 221       menu_shell = GTK_MENU_SHELL (widget);
 222
 223       nchildren = 0;
 224       children = menu_shell->children;
 225
 226       while (children)
 227         {
 228           child = children->data;
 229           children = children->next;
 230
 231           if (GTK_WIDGET_VISIBLE (child))
 232             {
 233               gint toggle_size;
 234
 235               GTK_MENU_ITEM (child)->show_submenu_indicator = FALSE;
 236               gtk_widget_size_request (child, &child_requisition);
 237               gtk_menu_item_toggle_size_request (GTK_MENU_ITEM (child),
 238                                                  &toggle_size);
 239
 240               requisition->width += child_requisition.width;
 241               requisition->width += toggle_size;
 242
 243               requisition->height = MAX (requisition->height, child_requisition.height);
 244               /* Support for the right justified help menu */
 245               if ((children == NULL) && GTK_IS_MENU_ITEM(child) &&
 246                   GTK_MENU_ITEM(child)->right_justify)
 247                 {
 248                   requisition->width += CHILD_SPACING;
 249                 }
 250
 251               nchildren += 1;
 252             }
 253         }
 254
 255       gtk_widget_style_get (widget, "internal_padding", &ipadding, NULL);
 256
 257       requisition->width += (GTK_CONTAINER (menu_bar)->border_width +
 258                              widget->style->xthickness +
 259                              ipadding +
 260                              BORDER_SPACING) * 2;
 261       requisition->height += (GTK_CONTAINER (menu_bar)->border_width +
 262                               widget->style->ythickness +
 263                               ipadding +
 264                               BORDER_SPACING) * 2;
 265
 266       if (nchildren > 0)
 267         requisition->width += 2 * CHILD_SPACING * (nchildren - 1);
 268     }
 269 }
 270
 271 static void
 272 gtk_menu_bar_size_allocate (GtkWidget     *widget,
 273                             GtkAllocation *allocation)
 274 {
 275   GtkMenuBar *menu_bar;
 276   GtkMenuShell *menu_shell;
 277   GtkWidget *child;
 278   GList *children;
 279   GtkAllocation child_allocation;
 280   GtkRequisition child_requisition;
 281   guint offset;
 282   gint ipadding;
 283
 284   g_return_if_fail (GTK_IS_MENU_BAR (widget));
 285   g_return_if_fail (allocation != NULL);
 286
 287   menu_bar = GTK_MENU_BAR (widget);
 288   menu_shell = GTK_MENU_SHELL (widget);
 289
 290   widget->allocation = *allocation;
 291   if (GTK_WIDGET_REALIZED (widget))
 292     gdk_window_move_resize (widget->window,
 293                             allocation->x, allocation->y,
 294                             allocation->width, allocation->height);
 295
 296   gtk_widget_style_get (widget, "internal_padding", &ipadding, NULL);
 297
 298   if (menu_shell->children)
 299     {
 300       child_allocation.x = (GTK_CONTAINER (menu_bar)->border_width +
 301                             widget->style->xthickness +
 302                             ipadding +
 303                             BORDER_SPACING);
 304       offset = child_allocation.x;      /* Window edge to menubar start */
 305
 306       child_allocation.y = (GTK_CONTAINER (menu_bar)->border_width +
 307                             widget->style->ythickness +
 308                             ipadding +
 309                             BORDER_SPACING);
 310       child_allocation.height = MAX (1, (gint)allocation->height - child_allocation.y * 2);
 311
 312       children = menu_shell->children;
 313       while (children)
 314         {
 315           gint toggle_size;
 316
 317           child = children->data;
 318           children = children->next;
 319
 320           gtk_menu_item_toggle_size_request (GTK_MENU_ITEM (child),
 321                                              &toggle_size);
 322           gtk_widget_get_child_requisition (child, &child_requisition);
 323
 324           child_requisition.width += toggle_size;
 325
 326           /* Support for the right justified help menu */
 327           if ( (children == NULL) && (GTK_IS_MENU_ITEM(child))
 328               && (GTK_MENU_ITEM(child)->right_justify))
 329             {
 330               child_allocation.x = allocation->width -
 331                   child_requisition.width - CHILD_SPACING - offset;
 332             }
 333           if (GTK_WIDGET_VISIBLE (child))
 334             {
 335               child_allocation.width = child_requisition.width;
 336
 337               gtk_menu_item_toggle_size_allocate (GTK_MENU_ITEM (child),
 338                                                   toggle_size);
 339               gtk_widget_size_allocate (child, &child_allocation);
 340
 341               child_allocation.x += child_allocation.width + CHILD_SPACING * 2;
 342             }
 343         }
 344     }
 345 }
 346
 347 static void
 348 gtk_menu_bar_paint (GtkWidget *widget, GdkRectangle *area)
 349 {
 350   g_return_if_fail (GTK_IS_MENU_BAR (widget));
 351
 352   if (GTK_WIDGET_DRAWABLE (widget))
 353     {
 354       gint border;
 355
 356       border = GTK_CONTAINER (widget)->border_width;
 357
 358       gtk_paint_box (widget->style,
 359                      widget->window,
 360                      GTK_WIDGET_STATE (widget),
 361                      get_shadow_type (GTK_MENU_BAR (widget)),
 362                      area, widget, "menubar",
 363                      border, border,
 364                      widget->allocation.width - border * 2,
 365                      widget->allocation.height - border * 2);
 366     }
 367 }
 368
 369 static gint
 370 gtk_menu_bar_expose (GtkWidget      *widget,
 371                      GdkEventExpose *event)
 372 {
 373   g_return_val_if_fail (GTK_IS_MENU_BAR (widget), FALSE);
 374   g_return_val_if_fail (event != NULL, FALSE);
 375
 376   if (GTK_WIDGET_DRAWABLE (widget))
 377     {
 378       gtk_menu_bar_paint (widget, &event->area);
 379
 380       (* GTK_WIDGET_CLASS (parent_class)->expose_event) (widget, event);
 381     }
 382
 383   return FALSE;
 384 }
 385
 386 static gboolean
 387 window_key_press_handler (GtkWidget   *widget,
 388                           GdkEventKey *event,
 389                           gpointer     data)
 390 {
 391   gchar *accel = NULL;
 392   gboolean retval = FALSE;
 393
 394   g_object_get (G_OBJECT (gtk_widget_get_settings (widget)),
 395                 "gtk-menu-bar-accel",
 396                 &accel,
 397                 NULL);
 398
 399   if (accel)
 400     {
 401       guint keyval = 0;
 402       GdkModifierType mods = 0;
 403
 404       gtk_accelerator_parse (accel, &keyval, &mods);
 405
 406       if (keyval == 0)
 407         g_warning ("Failed to parse menu bar accelerator '%s'\n", accel);
 408
 409       /* FIXME this is wrong, needs to be in the global accel resolution
 410        * thing, to properly consider i18n etc., but that probably requires
 411        * AccelGroup changes etc.
 412        */
 413       if (event->keyval == keyval &&
 414           (mods & event->state) == mods)
 415         {
 416           GtkMenuBar *menubar;
 417           GtkMenuShell *menushell;
 418
 419           menubar = GTK_MENU_BAR (data);
 420           menushell = GTK_MENU_SHELL (menubar);
 421
 422           if (menushell->children)
 423             {
 424               gtk_signal_emit_by_name (GTK_OBJECT (menushell->children->data),
 425                                        "activate_item");
 426
 427               retval = TRUE;
 428             }
 429         }
 430
 431       g_free (accel);
 432     }
 433
 434   return retval;
 435 }
 436
 437 static void
 438 add_to_window (GtkWindow  *window,
 439                GtkMenuBar *menubar)
 440 {
 441   GtkMenuBar *old_menubar;
 442
 443   old_menubar = g_object_get_data (G_OBJECT (window),
 444                                    "gtk-menu-bar");
 445
 446   if (old_menubar)
 447     return; /* ignore this case; app programmer on crack, but
 448              * shouldn't spew stuff, just don't support the accel
 449              * for menubar #2
 450              */
 451
 452   g_object_set_data (G_OBJECT (window),
 453                      "gtk-menu-bar",
 454                      menubar);
 455
 456   g_signal_connect (G_OBJECT (window),
 457                     "key_press_event",
 458                     G_CALLBACK (window_key_press_handler),
 459                     menubar);
 460 }
 461
 462 static void
 463 remove_from_window (GtkWindow  *window,
 464                     GtkMenuBar *menubar)
 465 {
 466   g_signal_handlers_disconnect_by_func (G_OBJECT (window),
 467                                         G_CALLBACK (window_key_press_handler),
 468                                         menubar);
 469 }
 470
 471 static void
 472 gtk_menu_bar_hierarchy_changed (GtkWidget *widget,
 473                                 GtkWidget *old_toplevel)
 474 {
 475   GtkWidget *toplevel;
 476   GtkMenuBar *menubar;
 477
 478   menubar = GTK_MENU_BAR (widget);
 479
 480   toplevel = gtk_widget_get_toplevel (widget);
 481
 482   if (old_toplevel)
 483     remove_from_window (GTK_WINDOW (old_toplevel), menubar);
 484
 485   if (GTK_WIDGET_TOPLEVEL (toplevel))
 486     add_to_window (GTK_WINDOW (toplevel), menubar);
 487 }
 488
 489 static GtkShadowType
 490 get_shadow_type (GtkMenuBar *menubar)
 491 {
 492   GtkShadowType shadow_type = GTK_SHADOW_OUT;
 493
 494   gtk_widget_style_get (GTK_WIDGET (menubar),
 495                         "shadow_type", &shadow_type,
 496                         NULL);
 497
 498
 499   return shadow_type;
 500 }