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_Right, 0,
 111                                 "move_current", 1,
 112                                 GTK_TYPE_MENU_DIRECTION_TYPE,
 113                                 GTK_MENU_DIR_NEXT);
 114   gtk_binding_entry_add_signal (binding_set,
 115                                 GDK_Up, 0,
 116                                 "move_current", 1,
 117                                 GTK_TYPE_MENU_DIRECTION_TYPE,
 118                                 GTK_MENU_DIR_PARENT);
 119   gtk_binding_entry_add_signal (binding_set,
 120                                 GDK_Down, 0,
 121                                 "move_current", 1,
 122                                 GTK_TYPE_MENU_DIRECTION_TYPE,
 123                                 GTK_MENU_DIR_CHILD);
 124
 125   gtk_settings_install_property (gtk_settings_get_global (),
 126                                  g_param_spec_string ("gtk-menu-bar-accel",
 127                                                       _("Menu bar accelerator"),
 128                                                       _("Keybinding to activate the menu bar"),
 129                                                       "F10",
 130                                                       G_PARAM_READWRITE));
 131
 132   gtk_widget_class_install_style_property (widget_class,
 133                                            g_param_spec_enum ("shadow_type",
 134                                                               _("Shadow type"),
 135                                                               _("Style of bevel around the menubar"),
 136                                                               GTK_TYPE_SHADOW_TYPE,
 137                                                               GTK_SHADOW_OUT,
 138                                                               G_PARAM_READABLE));
 139
 140   gtk_widget_class_install_style_property (widget_class,
 141                                            g_param_spec_int ("internal_padding",
 142                                                              _("Internal padding"),
 143                                                              _("Amount of border space between the menubar shadow and the menu items"),
 144                                                              0,
 145                                                              G_MAXINT,
 146                                                              DEFAULT_IPADDING,
 147                                                              G_PARAM_READABLE));
 148
 149 }
 150
 151 GtkWidget*
 152 gtk_menu_bar_new (void)
 153 {
 154   return GTK_WIDGET (gtk_type_new (gtk_menu_bar_get_type ()));
 155 }
 156
 157 void
 158 gtk_menu_bar_append (GtkMenuBar *menu_bar,
 159                      GtkWidget  *child)
 160 {
 161   gtk_menu_shell_append (GTK_MENU_SHELL (menu_bar), child);
 162 }
 163
 164 void
 165 gtk_menu_bar_prepend (GtkMenuBar *menu_bar,
 166                       GtkWidget  *child)
 167 {
 168   gtk_menu_shell_prepend (GTK_MENU_SHELL (menu_bar), child);
 169 }
 170
 171 void
 172 gtk_menu_bar_insert (GtkMenuBar *menu_bar,
 173                      GtkWidget  *child,
 174                      gint        position)
 175 {
 176   gtk_menu_shell_insert (GTK_MENU_SHELL (menu_bar), child, position);
 177 }
 178
 179
 180 static void
 181 gtk_menu_bar_size_request (GtkWidget      *widget,
 182                            GtkRequisition *requisition)
 183 {
 184   GtkMenuBar *menu_bar;
 185   GtkMenuShell *menu_shell;
 186   GtkWidget *child;
 187   GList *children;
 188   gint nchildren;
 189   GtkRequisition child_requisition;
 190   gint ipadding;
 191
 192   g_return_if_fail (widget != NULL);
 193   g_return_if_fail (GTK_IS_MENU_BAR (widget));
 194   g_return_if_fail (requisition != NULL);
 195
 196   requisition->width = 0;
 197   requisition->height = 0;
 198
 199   if (GTK_WIDGET_VISIBLE (widget))
 200     {
 201       menu_bar = GTK_MENU_BAR (widget);
 202       menu_shell = GTK_MENU_SHELL (widget);
 203
 204       nchildren = 0;
 205       children = menu_shell->children;
 206
 207       while (children)
 208         {
 209           child = children->data;
 210           children = children->next;
 211
 212           if (GTK_WIDGET_VISIBLE (child))
 213             {
 214               gint toggle_size;
 215
 216               GTK_MENU_ITEM (child)->show_submenu_indicator = FALSE;
 217               gtk_widget_size_request (child, &child_requisition);
 218               gtk_menu_item_toggle_size_request (GTK_MENU_ITEM (child),
 219                                                  &toggle_size);
 220
 221               requisition->width += child_requisition.width;
 222               requisition->width += toggle_size;
 223
 224               requisition->height = MAX (requisition->height, child_requisition.height);
 225               /* Support for the right justified help menu */
 226               if ((children == NULL) && GTK_IS_MENU_ITEM(child) &&
 227                   GTK_MENU_ITEM(child)->right_justify)
 228                 {
 229                   requisition->width += CHILD_SPACING;
 230                 }
 231
 232               nchildren += 1;
 233             }
 234         }
 235
 236       gtk_widget_style_get (widget, "internal_padding", &ipadding, NULL);
 237
 238       requisition->width += (GTK_CONTAINER (menu_bar)->border_width +
 239                              widget->style->xthickness +
 240                              ipadding +
 241                              BORDER_SPACING) * 2;
 242       requisition->height += (GTK_CONTAINER (menu_bar)->border_width +
 243                               widget->style->ythickness +
 244                               ipadding +
 245                               BORDER_SPACING) * 2;
 246
 247       if (nchildren > 0)
 248         requisition->width += 2 * CHILD_SPACING * (nchildren - 1);
 249     }
 250 }
 251
 252 static void
 253 gtk_menu_bar_size_allocate (GtkWidget     *widget,
 254                             GtkAllocation *allocation)
 255 {
 256   GtkMenuBar *menu_bar;
 257   GtkMenuShell *menu_shell;
 258   GtkWidget *child;
 259   GList *children;
 260   GtkAllocation child_allocation;
 261   GtkRequisition child_requisition;
 262   guint offset;
 263   gint ipadding;
 264
 265   g_return_if_fail (widget != NULL);
 266   g_return_if_fail (GTK_IS_MENU_BAR (widget));
 267   g_return_if_fail (allocation != NULL);
 268
 269   menu_bar = GTK_MENU_BAR (widget);
 270   menu_shell = GTK_MENU_SHELL (widget);
 271
 272   widget->allocation = *allocation;
 273   if (GTK_WIDGET_REALIZED (widget))
 274     gdk_window_move_resize (widget->window,
 275                             allocation->x, allocation->y,
 276                             allocation->width, allocation->height);
 277
 278   gtk_widget_style_get (widget, "internal_padding", &ipadding, NULL);
 279
 280   if (menu_shell->children)
 281     {
 282       child_allocation.x = (GTK_CONTAINER (menu_bar)->border_width +
 283                             widget->style->xthickness +
 284                             ipadding +
 285                             BORDER_SPACING);
 286       offset = child_allocation.x;      /* Window edge to menubar start */
 287
 288       child_allocation.y = (GTK_CONTAINER (menu_bar)->border_width +
 289                             widget->style->ythickness +
 290                             ipadding +
 291                             BORDER_SPACING);
 292       child_allocation.height = MAX (1, (gint)allocation->height - child_allocation.y * 2);
 293
 294       children = menu_shell->children;
 295       while (children)
 296         {
 297           gint toggle_size;
 298
 299           child = children->data;
 300           children = children->next;
 301
 302           gtk_menu_item_toggle_size_request (GTK_MENU_ITEM (child),
 303                                              &toggle_size);
 304           gtk_widget_get_child_requisition (child, &child_requisition);
 305
 306           child_requisition.width += toggle_size;
 307
 308           /* Support for the right justified help menu */
 309           if ( (children == NULL) && (GTK_IS_MENU_ITEM(child))
 310               && (GTK_MENU_ITEM(child)->right_justify))
 311             {
 312               child_allocation.x = allocation->width -
 313                   child_requisition.width - CHILD_SPACING - offset;
 314             }
 315           if (GTK_WIDGET_VISIBLE (child))
 316             {
 317               child_allocation.width = child_requisition.width;
 318
 319               gtk_menu_item_toggle_size_allocate (GTK_MENU_ITEM (child),
 320                                                   toggle_size);
 321               gtk_widget_size_allocate (child, &child_allocation);
 322
 323               child_allocation.x += child_allocation.width + CHILD_SPACING * 2;
 324             }
 325         }
 326     }
 327 }
 328
 329 static void
 330 gtk_menu_bar_paint (GtkWidget *widget, GdkRectangle *area)
 331 {
 332   g_return_if_fail (widget != NULL);
 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 (widget != NULL, FALSE);
 357   g_return_val_if_fail (GTK_IS_MENU_BAR (widget), FALSE);
 358   g_return_val_if_fail (event != NULL, FALSE);
 359
 360   if (GTK_WIDGET_DRAWABLE (widget))
 361     {
 362       gtk_menu_bar_paint (widget, &event->area);
 363
 364       (* GTK_WIDGET_CLASS (parent_class)->expose_event) (widget, event);
 365     }
 366
 367   return FALSE;
 368 }
 369
 370 static gboolean
 371 window_key_press_handler (GtkWidget   *widget,
 372                           GdkEventKey *event,
 373                           gpointer     data)
 374 {
 375   gchar *accel = NULL;
 376   gboolean retval = FALSE;
 377
 378   g_object_get (G_OBJECT (gtk_settings_get_global ()),
 379                 "gtk-menu-bar-accel",
 380                 &accel,
 381                 NULL);
 382
 383   if (accel)
 384     {
 385       guint keyval = 0;
 386       GdkModifierType mods = 0;
 387
 388       gtk_accelerator_parse (accel, &keyval, &mods);
 389
 390       if (keyval == 0)
 391         g_warning ("Failed to parse menu bar accelerator '%s'\n", accel);
 392
 393       /* FIXME this is wrong, needs to be in the global accel resolution
 394        * thing, to properly consider i18n etc., but that probably requires
 395        * AccelGroup changes etc.
 396        */
 397       if (event->keyval == keyval &&
 398           (mods & event->state) == mods)
 399         {
 400           GtkMenuBar *menubar;
 401           GtkMenuShell *menushell;
 402
 403           menubar = GTK_MENU_BAR (data);
 404           menushell = GTK_MENU_SHELL (menubar);
 405
 406           if (menushell->children)
 407             {
 408               gtk_signal_emit_by_name (GTK_OBJECT (menushell->children->data),
 409                                        "activate_item");
 410
 411               retval = TRUE;
 412             }
 413         }
 414
 415       g_free (accel);
 416     }
 417
 418   return retval;
 419 }
 420
 421 static void
 422 add_to_window (GtkWindow  *window,
 423                GtkMenuBar *menubar)
 424 {
 425   GtkMenuBar *old_menubar;
 426
 427   old_menubar = g_object_get_data (G_OBJECT (window),
 428                                    "gtk-menu-bar");
 429
 430   if (old_menubar)
 431     return; /* ignore this case; app programmer on crack, but
 432              * shouldn't spew stuff, just don't support the accel
 433              * for menubar #2
 434              */
 435
 436   g_object_set_data (G_OBJECT (window),
 437                      "gtk-menu-bar",
 438                      menubar);
 439
 440   g_signal_connect_data (G_OBJECT (window),
 441                          "key_press_event",
 442                          G_CALLBACK (window_key_press_handler),
 443                          menubar,
 444                          NULL, FALSE, FALSE);
 445
 446   menubar->toplevel = GTK_WIDGET (window);
 447 }
 448
 449 /* Hack-around */
 450 #define g_signal_handlers_disconnect_by_func(obj, func, data) g_signal_handlers_disconnect_matched (obj, G_SIGNAL_MATCH_FUNC | G_SIGNAL_MATCH_DATA, 0, 0, NULL, func, data)
 451
 452 static void
 453 remove_from_window (GtkWindow  *window,
 454                     GtkMenuBar *menubar)
 455 {
 456   g_return_if_fail (menubar->toplevel == GTK_WIDGET (window));
 457
 458   g_signal_handlers_disconnect_by_func (G_OBJECT (window),
 459                                         G_CALLBACK (window_key_press_handler),
 460                                         menubar);
 461
 462   /* dnotify zeroes menubar->toplevel */
 463   g_object_set_data (G_OBJECT (window),
 464                      "gtk-menu-bar",
 465                      NULL);
 466
 467   menubar->toplevel = NULL;
 468 }
 469
 470 static void
 471 gtk_menu_bar_hierarchy_changed (GtkWidget *widget)
 472 {
 473   GtkWidget *toplevel;
 474   GtkMenuBar *menubar;
 475
 476   menubar = GTK_MENU_BAR (widget);
 477
 478   toplevel = gtk_widget_get_toplevel (widget);
 479
 480   if (menubar->toplevel &&
 481       toplevel != menubar->toplevel)
 482     {
 483       remove_from_window (GTK_WINDOW (menubar->toplevel),
 484                           menubar);
 485     }
 486
 487   if (toplevel &&
 488       GTK_IS_WINDOW (toplevel))
 489     {
 490       add_to_window (GTK_WINDOW (toplevel),
 491                      menubar);
 492     }
 493 }
 494
 495 static GtkShadowType
 496 get_shadow_type (GtkMenuBar *menubar)
 497 {
 498   GtkShadowType shadow_type = GTK_SHADOW_OUT;
 499
 500   gtk_widget_style_get (GTK_WIDGET (menubar),
 501                         "shadow_type", &shadow_type,
 502                         NULL);
 503
 504
 505   return shadow_type;
 506 }