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 enum {
  38   ARG_0,
  39   ARG_SHADOW
  40 };
  41
  42
  43 #define BORDER_SPACING  0
  44 #define CHILD_SPACING   3
  45
  46
  47 static void gtk_menu_bar_class_init    (GtkMenuBarClass *klass);
  48 static void gtk_menu_bar_size_request  (GtkWidget       *widget,
  49                                         GtkRequisition  *requisition);
  50 static void gtk_menu_bar_size_allocate (GtkWidget       *widget,
  51                                         GtkAllocation   *allocation);
  52 static void gtk_menu_bar_paint         (GtkWidget       *widget,
  53                                         GdkRectangle    *area);
  54 static gint gtk_menu_bar_expose        (GtkWidget       *widget,
  55                                         GdkEventExpose  *event);
  56 static void gtk_menu_bar_hierarchy_changed (GtkWidget   *widget);
  57 static GtkShadowType get_shadow_type   (GtkMenuBar      *menubar);
  58
  59 static GtkMenuShellClass *parent_class = NULL;
  60
  61 GtkType
  62 gtk_menu_bar_get_type (void)
  63 {
  64   static GtkType menu_bar_type = 0;
  65
  66   if (!menu_bar_type)
  67     {
  68       static const GtkTypeInfo menu_bar_info =
  69       {
  70         "GtkMenuBar",
  71         sizeof (GtkMenuBar),
  72         sizeof (GtkMenuBarClass),
  73         (GtkClassInitFunc) gtk_menu_bar_class_init,
  74         (GtkObjectInitFunc) NULL,
  75         /* reserved_1 */ NULL,
  76         /* reserved_2 */ NULL,
  77         (GtkClassInitFunc) NULL,
  78       };
  79
  80       menu_bar_type = gtk_type_unique (gtk_menu_shell_get_type (), &menu_bar_info);
  81     }
  82
  83   return menu_bar_type;
  84 }
  85
  86 static void
  87 gtk_menu_bar_class_init (GtkMenuBarClass *class)
  88 {
  89   GtkObjectClass *object_class;
  90   GtkWidgetClass *widget_class;
  91   GtkMenuShellClass *menu_shell_class;
  92
  93   GtkBindingSet *binding_set;
  94
  95   parent_class = g_type_class_peek_parent (class);
  96
  97   object_class = (GtkObjectClass*) class;
  98   widget_class = (GtkWidgetClass*) class;
  99   menu_shell_class = (GtkMenuShellClass*) class;
 100
 101   widget_class->size_request = gtk_menu_bar_size_request;
 102   widget_class->size_allocate = gtk_menu_bar_size_allocate;
 103   widget_class->expose_event = gtk_menu_bar_expose;
 104   widget_class->hierarchy_changed = gtk_menu_bar_hierarchy_changed;
 105
 106   menu_shell_class->submenu_placement = GTK_TOP_BOTTOM;
 107
 108   binding_set = gtk_binding_set_by_class (class);
 109   gtk_binding_entry_add_signal (binding_set,
 110                                 GDK_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_Up, 0,
 121                                 "move_current", 1,
 122                                 GTK_TYPE_MENU_DIRECTION_TYPE,
 123                                 GTK_MENU_DIR_PARENT);
 124   gtk_binding_entry_add_signal (binding_set,
 125                                 GDK_Down, 0,
 126                                 "move_current", 1,
 127                                 GTK_TYPE_MENU_DIRECTION_TYPE,
 128                                 GTK_MENU_DIR_CHILD);
 129
 130   gtk_settings_install_property (gtk_settings_get_global (),
 131                                  g_param_spec_string ("gtk-menu-bar-accel",
 132                                                       _("Menu bar accelerator"),
 133                                                       _("Keybinding to activate the menu bar"),
 134                                                       "F10",
 135                                                       G_PARAM_READWRITE));
 136
 137   gtk_widget_class_install_style_property (widget_class,
 138                                            g_param_spec_enum ("shadow_type",
 139                                                               _("Shadow type"),
 140                                                               _("Style of bevel around the menubar"),
 141                                                               GTK_TYPE_SHADOW_TYPE,
 142                                                               GTK_SHADOW_OUT,
 143                                                               G_PARAM_READABLE));
 144 }
 145
 146 GtkWidget*
 147 gtk_menu_bar_new (void)
 148 {
 149   return GTK_WIDGET (gtk_type_new (gtk_menu_bar_get_type ()));
 150 }
 151
 152 void
 153 gtk_menu_bar_append (GtkMenuBar *menu_bar,
 154                      GtkWidget  *child)
 155 {
 156   gtk_menu_shell_append (GTK_MENU_SHELL (menu_bar), child);
 157 }
 158
 159 void
 160 gtk_menu_bar_prepend (GtkMenuBar *menu_bar,
 161                       GtkWidget  *child)
 162 {
 163   gtk_menu_shell_prepend (GTK_MENU_SHELL (menu_bar), child);
 164 }
 165
 166 void
 167 gtk_menu_bar_insert (GtkMenuBar *menu_bar,
 168                      GtkWidget  *child,
 169                      gint        position)
 170 {
 171   gtk_menu_shell_insert (GTK_MENU_SHELL (menu_bar), child, position);
 172 }
 173
 174
 175 static void
 176 gtk_menu_bar_size_request (GtkWidget      *widget,
 177                            GtkRequisition *requisition)
 178 {
 179   GtkMenuBar *menu_bar;
 180   GtkMenuShell *menu_shell;
 181   GtkWidget *child;
 182   GList *children;
 183   gint nchildren;
 184   GtkRequisition child_requisition;
 185
 186   g_return_if_fail (widget != NULL);
 187   g_return_if_fail (GTK_IS_MENU_BAR (widget));
 188   g_return_if_fail (requisition != NULL);
 189
 190   requisition->width = 0;
 191   requisition->height = 0;
 192
 193   if (GTK_WIDGET_VISIBLE (widget))
 194     {
 195       menu_bar = GTK_MENU_BAR (widget);
 196       menu_shell = GTK_MENU_SHELL (widget);
 197
 198       nchildren = 0;
 199       children = menu_shell->children;
 200
 201       while (children)
 202         {
 203           child = children->data;
 204           children = children->next;
 205
 206           if (GTK_WIDGET_VISIBLE (child))
 207             {
 208               gint toggle_size;
 209
 210               GTK_MENU_ITEM (child)->show_submenu_indicator = FALSE;
 211               gtk_widget_size_request (child, &child_requisition);
 212               gtk_menu_item_toggle_size_request (GTK_MENU_ITEM (child),
 213                                                  &toggle_size);
 214
 215               requisition->width += child_requisition.width;
 216               requisition->width += toggle_size;
 217
 218               requisition->height = MAX (requisition->height, child_requisition.height);
 219               /* Support for the right justified help menu */
 220               if ((children == NULL) && GTK_IS_MENU_ITEM(child) &&
 221                   GTK_MENU_ITEM(child)->right_justify)
 222                 {
 223                   requisition->width += CHILD_SPACING;
 224                 }
 225
 226               nchildren += 1;
 227             }
 228         }
 229
 230       requisition->width += (GTK_CONTAINER (menu_bar)->border_width +
 231                              widget->style->xthickness +
 232                              BORDER_SPACING) * 2;
 233       requisition->height += (GTK_CONTAINER (menu_bar)->border_width +
 234                               widget->style->ythickness +
 235                               BORDER_SPACING) * 2;
 236
 237       if (nchildren > 0)
 238         requisition->width += 2 * CHILD_SPACING * (nchildren - 1);
 239     }
 240 }
 241
 242 static void
 243 gtk_menu_bar_size_allocate (GtkWidget     *widget,
 244                             GtkAllocation *allocation)
 245 {
 246   GtkMenuBar *menu_bar;
 247   GtkMenuShell *menu_shell;
 248   GtkWidget *child;
 249   GList *children;
 250   GtkAllocation child_allocation;
 251   GtkRequisition child_requisition;
 252   guint offset;
 253
 254   g_return_if_fail (widget != NULL);
 255   g_return_if_fail (GTK_IS_MENU_BAR (widget));
 256   g_return_if_fail (allocation != NULL);
 257
 258   menu_bar = GTK_MENU_BAR (widget);
 259   menu_shell = GTK_MENU_SHELL (widget);
 260
 261   widget->allocation = *allocation;
 262   if (GTK_WIDGET_REALIZED (widget))
 263     gdk_window_move_resize (widget->window,
 264                             allocation->x, allocation->y,
 265                             allocation->width, allocation->height);
 266
 267   if (menu_shell->children)
 268     {
 269       child_allocation.x = (GTK_CONTAINER (menu_bar)->border_width +
 270                             widget->style->xthickness +
 271                             BORDER_SPACING);
 272       offset = child_allocation.x;      /* Window edge to menubar start */
 273
 274       child_allocation.y = (GTK_CONTAINER (menu_bar)->border_width +
 275                             widget->style->ythickness +
 276                             BORDER_SPACING);
 277       child_allocation.height = MAX (1, (gint)allocation->height - child_allocation.y * 2);
 278
 279       children = menu_shell->children;
 280       while (children)
 281         {
 282           gint toggle_size;
 283
 284           child = children->data;
 285           children = children->next;
 286
 287           gtk_menu_item_toggle_size_request (GTK_MENU_ITEM (child),
 288                                              &toggle_size);
 289           gtk_widget_get_child_requisition (child, &child_requisition);
 290
 291           child_requisition.width += toggle_size;
 292
 293           /* Support for the right justified help menu */
 294           if ( (children == NULL) && (GTK_IS_MENU_ITEM(child))
 295               && (GTK_MENU_ITEM(child)->right_justify))
 296             {
 297               child_allocation.x = allocation->width -
 298                   child_requisition.width - CHILD_SPACING - offset;
 299             }
 300           if (GTK_WIDGET_VISIBLE (child))
 301             {
 302               child_allocation.width = child_requisition.width;
 303
 304               gtk_menu_item_toggle_size_allocate (GTK_MENU_ITEM (child),
 305                                                   toggle_size);
 306               gtk_widget_size_allocate (child, &child_allocation);
 307
 308               child_allocation.x += child_allocation.width + CHILD_SPACING * 2;
 309             }
 310         }
 311     }
 312 }
 313
 314 static void
 315 gtk_menu_bar_paint (GtkWidget *widget, GdkRectangle *area)
 316 {
 317   g_return_if_fail (widget != NULL);
 318   g_return_if_fail (GTK_IS_MENU_BAR (widget));
 319
 320   if (GTK_WIDGET_DRAWABLE (widget))
 321     {
 322       gtk_paint_box (widget->style,
 323                      widget->window,
 324                      GTK_STATE_NORMAL,
 325                      get_shadow_type (GTK_MENU_BAR (widget)),
 326                      area, widget, "menubar",
 327                      0, 0,
 328                      -1,-1);
 329     }
 330 }
 331
 332 static gint
 333 gtk_menu_bar_expose (GtkWidget      *widget,
 334                      GdkEventExpose *event)
 335 {
 336   g_return_val_if_fail (widget != NULL, FALSE);
 337   g_return_val_if_fail (GTK_IS_MENU_BAR (widget), FALSE);
 338   g_return_val_if_fail (event != NULL, FALSE);
 339
 340   if (GTK_WIDGET_DRAWABLE (widget))
 341     {
 342       gtk_menu_bar_paint (widget, &event->area);
 343
 344       (* GTK_WIDGET_CLASS (parent_class)->expose_event) (widget, event);
 345     }
 346
 347   return FALSE;
 348 }
 349
 350 static gboolean
 351 window_key_press_handler (GtkWidget   *widget,
 352                           GdkEventKey *event,
 353                           gpointer     data)
 354 {
 355   gchar *accel = NULL;
 356   gboolean retval = FALSE;
 357
 358   g_object_get (G_OBJECT (gtk_settings_get_global ()),
 359                 "gtk-menu-bar-accel",
 360                 &accel,
 361                 NULL);
 362
 363   if (accel)
 364     {
 365       guint keyval = 0;
 366       GdkModifierType mods = 0;
 367
 368       gtk_accelerator_parse (accel, &keyval, &mods);
 369
 370       if (keyval == 0)
 371         g_warning ("Failed to parse menu bar accelerator '%s'\n", accel);
 372
 373       /* FIXME this is wrong, needs to be in the global accel resolution
 374        * thing, to properly consider i18n etc., but that probably requires
 375        * AccelGroup changes etc.
 376        */
 377       if (event->keyval == keyval &&
 378           (mods & event->state) == mods)
 379         {
 380           GtkMenuBar *menubar;
 381           GtkMenuShell *menushell;
 382
 383           menubar = GTK_MENU_BAR (data);
 384           menushell = GTK_MENU_SHELL (menubar);
 385
 386           if (menushell->children)
 387             {
 388               gtk_signal_emit_by_name (GTK_OBJECT (menushell->children->data),
 389                                        "activate_item");
 390
 391               retval = TRUE;
 392             }
 393         }
 394
 395       g_free (accel);
 396     }
 397
 398   return retval;
 399 }
 400
 401 static void
 402 add_to_window (GtkWindow  *window,
 403                GtkMenuBar *menubar)
 404 {
 405   GtkMenuBar *old_menubar;
 406
 407   old_menubar = g_object_get_data (G_OBJECT (window),
 408                                    "gtk-menu-bar");
 409
 410   if (old_menubar)
 411     return; /* ignore this case; app programmer on crack, but
 412              * shouldn't spew stuff, just don't support the accel
 413              * for menubar #2
 414              */
 415
 416   g_object_set_data (G_OBJECT (window),
 417                      "gtk-menu-bar",
 418                      menubar);
 419
 420   g_signal_connect_data (G_OBJECT (window),
 421                          "key_press_event",
 422                          G_CALLBACK (window_key_press_handler),
 423                          menubar,
 424                          NULL, FALSE, FALSE);
 425
 426   menubar->toplevel = GTK_WIDGET (window);
 427 }
 428
 429 /* Hack-around */
 430 #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)
 431
 432 static void
 433 remove_from_window (GtkWindow  *window,
 434                     GtkMenuBar *menubar)
 435 {
 436   g_return_if_fail (menubar->toplevel == GTK_WIDGET (window));
 437
 438   g_signal_handlers_disconnect_by_func (G_OBJECT (window),
 439                                         G_CALLBACK (window_key_press_handler),
 440                                         menubar);
 441
 442   /* dnotify zeroes menubar->toplevel */
 443   g_object_set_data (G_OBJECT (window),
 444                      "gtk-menu-bar",
 445                      NULL);
 446
 447   menubar->toplevel = NULL;
 448 }
 449
 450 static void
 451 gtk_menu_bar_hierarchy_changed (GtkWidget *widget)
 452 {
 453   GtkWidget *toplevel;
 454   GtkMenuBar *menubar;
 455
 456   menubar = GTK_MENU_BAR (widget);
 457
 458   toplevel = gtk_widget_get_toplevel (widget);
 459
 460   if (menubar->toplevel &&
 461       toplevel != menubar->toplevel)
 462     {
 463       remove_from_window (GTK_WINDOW (menubar->toplevel),
 464                           menubar);
 465     }
 466
 467   if (toplevel &&
 468       GTK_IS_WINDOW (toplevel))
 469     {
 470       add_to_window (GTK_WINDOW (toplevel),
 471                      menubar);
 472     }
 473 }
 474
 475 static GtkShadowType
 476 get_shadow_type (GtkMenuBar *menubar)
 477 {
 478   GtkShadowType shadow_type = GTK_SHADOW_OUT;
 479
 480   gtk_widget_style_get (GTK_WIDGET (menubar),
 481                         "shadow_type", &shadow_type,
 482                         NULL);
 483
 484
 485   return shadow_type;
 486 }