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
  33 enum {
  34   ARG_0,
  35   ARG_SHADOW
  36 };
  37
  38
  39 #define BORDER_SPACING  0
  40 #define CHILD_SPACING   3
  41
  42
  43 static void gtk_menu_bar_class_init    (GtkMenuBarClass *klass);
  44 static void gtk_menu_bar_init          (GtkMenuBar      *menu_bar);
  45 static void gtk_menu_bar_set_arg       (GtkObject      *object,
  46                                         GtkArg         *arg,
  47                                         guint           arg_id);
  48 static void gtk_menu_bar_get_arg       (GtkObject      *object,
  49                                         GtkArg         *arg,
  50                                         guint           arg_id);
  51 static void gtk_menu_bar_size_request  (GtkWidget       *widget,
  52                                         GtkRequisition  *requisition);
  53 static void gtk_menu_bar_size_allocate (GtkWidget       *widget,
  54                                         GtkAllocation   *allocation);
  55 static void gtk_menu_bar_paint         (GtkWidget       *widget,
  56                                         GdkRectangle    *area);
  57 static gint gtk_menu_bar_expose        (GtkWidget       *widget,
  58                                         GdkEventExpose  *event);
  59
  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) gtk_menu_bar_init,
  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   object_class = (GtkObjectClass*) class;
  96   widget_class = (GtkWidgetClass*) class;
  97   menu_shell_class = (GtkMenuShellClass*) class;
  98
  99   gtk_object_add_arg_type ("GtkMenuBar::shadow", GTK_TYPE_SHADOW_TYPE, GTK_ARG_READWRITE, ARG_SHADOW);
 100
 101   object_class->set_arg = gtk_menu_bar_set_arg;
 102   object_class->get_arg = gtk_menu_bar_get_arg;
 103
 104   widget_class->size_request = gtk_menu_bar_size_request;
 105   widget_class->size_allocate = gtk_menu_bar_size_allocate;
 106   widget_class->expose_event = gtk_menu_bar_expose;
 107
 108   menu_shell_class->submenu_placement = GTK_TOP_BOTTOM;
 109
 110   binding_set = gtk_binding_set_by_class (class);
 111   gtk_binding_entry_add_signal (binding_set,
 112                                 GDK_Left, 0,
 113                                 "move_current", 1,
 114                                 GTK_TYPE_MENU_DIRECTION_TYPE,
 115                                 GTK_MENU_DIR_PREV);
 116   gtk_binding_entry_add_signal (binding_set,
 117                                 GDK_Right, 0,
 118                                 "move_current", 1,
 119                                 GTK_TYPE_MENU_DIRECTION_TYPE,
 120                                 GTK_MENU_DIR_NEXT);
 121   gtk_binding_entry_add_signal (binding_set,
 122                                 GDK_Up, 0,
 123                                 "move_current", 1,
 124                                 GTK_TYPE_MENU_DIRECTION_TYPE,
 125                                 GTK_MENU_DIR_PARENT);
 126   gtk_binding_entry_add_signal (binding_set,
 127                                 GDK_Down, 0,
 128                                 "move_current", 1,
 129                                 GTK_TYPE_MENU_DIRECTION_TYPE,
 130                                 GTK_MENU_DIR_CHILD);
 131 }
 132
 133 static void
 134 gtk_menu_bar_init (GtkMenuBar *menu_bar)
 135 {
 136   menu_bar->shadow_type = GTK_SHADOW_OUT;
 137 }
 138
 139 static void
 140 gtk_menu_bar_set_arg (GtkObject      *object,
 141                       GtkArg         *arg,
 142                       guint           arg_id)
 143 {
 144   GtkMenuBar *menu_bar;
 145
 146   menu_bar = GTK_MENU_BAR (object);
 147
 148   switch (arg_id)
 149     {
 150     case ARG_SHADOW:
 151       gtk_menu_bar_set_shadow_type (menu_bar, GTK_VALUE_ENUM (*arg));
 152       break;
 153     default:
 154       break;
 155     }
 156 }
 157
 158 static void
 159 gtk_menu_bar_get_arg (GtkObject      *object,
 160                       GtkArg         *arg,
 161                       guint           arg_id)
 162 {
 163   GtkMenuBar *menu_bar;
 164
 165   menu_bar = GTK_MENU_BAR (object);
 166
 167   switch (arg_id)
 168     {
 169     case ARG_SHADOW:
 170       GTK_VALUE_ENUM (*arg) = menu_bar->shadow_type;
 171       break;
 172     default:
 173       arg->type = GTK_TYPE_INVALID;
 174       break;
 175     }
 176 }
 177
 178 GtkWidget*
 179 gtk_menu_bar_new (void)
 180 {
 181   return GTK_WIDGET (gtk_type_new (gtk_menu_bar_get_type ()));
 182 }
 183
 184 void
 185 gtk_menu_bar_append (GtkMenuBar *menu_bar,
 186                      GtkWidget  *child)
 187 {
 188   gtk_menu_shell_append (GTK_MENU_SHELL (menu_bar), child);
 189 }
 190
 191 void
 192 gtk_menu_bar_prepend (GtkMenuBar *menu_bar,
 193                       GtkWidget  *child)
 194 {
 195   gtk_menu_shell_prepend (GTK_MENU_SHELL (menu_bar), child);
 196 }
 197
 198 void
 199 gtk_menu_bar_insert (GtkMenuBar *menu_bar,
 200                      GtkWidget  *child,
 201                      gint        position)
 202 {
 203   gtk_menu_shell_insert (GTK_MENU_SHELL (menu_bar), child, position);
 204 }
 205
 206
 207 static void
 208 gtk_menu_bar_size_request (GtkWidget      *widget,
 209                            GtkRequisition *requisition)
 210 {
 211   GtkMenuBar *menu_bar;
 212   GtkMenuShell *menu_shell;
 213   GtkWidget *child;
 214   GList *children;
 215   gint nchildren;
 216   GtkRequisition child_requisition;
 217
 218   g_return_if_fail (widget != NULL);
 219   g_return_if_fail (GTK_IS_MENU_BAR (widget));
 220   g_return_if_fail (requisition != NULL);
 221
 222   requisition->width = 0;
 223   requisition->height = 0;
 224
 225   if (GTK_WIDGET_VISIBLE (widget))
 226     {
 227       menu_bar = GTK_MENU_BAR (widget);
 228       menu_shell = GTK_MENU_SHELL (widget);
 229
 230       nchildren = 0;
 231       children = menu_shell->children;
 232
 233       while (children)
 234         {
 235           child = children->data;
 236           children = children->next;
 237
 238           if (GTK_WIDGET_VISIBLE (child))
 239             {
 240               gint toggle_size;
 241
 242               GTK_MENU_ITEM (child)->show_submenu_indicator = FALSE;
 243               gtk_widget_size_request (child, &child_requisition);
 244               gtk_menu_item_toggle_size_request (GTK_MENU_ITEM (child),
 245                                                  &toggle_size);
 246
 247               requisition->width += child_requisition.width;
 248               requisition->width += toggle_size;
 249
 250               requisition->height = MAX (requisition->height, child_requisition.height);
 251               /* Support for the right justified help menu */
 252               if ((children == NULL) && GTK_IS_MENU_ITEM(child) &&
 253                   GTK_MENU_ITEM(child)->right_justify)
 254                 {
 255                   requisition->width += CHILD_SPACING;
 256                 }
 257
 258               nchildren += 1;
 259             }
 260         }
 261
 262       requisition->width += (GTK_CONTAINER (menu_bar)->border_width +
 263                              widget->style->xthickness +
 264                              BORDER_SPACING) * 2;
 265       requisition->height += (GTK_CONTAINER (menu_bar)->border_width +
 266                               widget->style->ythickness +
 267                               BORDER_SPACING) * 2;
 268
 269       if (nchildren > 0)
 270         requisition->width += 2 * CHILD_SPACING * (nchildren - 1);
 271     }
 272 }
 273
 274 static void
 275 gtk_menu_bar_size_allocate (GtkWidget     *widget,
 276                             GtkAllocation *allocation)
 277 {
 278   GtkMenuBar *menu_bar;
 279   GtkMenuShell *menu_shell;
 280   GtkWidget *child;
 281   GList *children;
 282   GtkAllocation child_allocation;
 283   GtkRequisition child_requisition;
 284   guint offset;
 285
 286   g_return_if_fail (widget != NULL);
 287   g_return_if_fail (GTK_IS_MENU_BAR (widget));
 288   g_return_if_fail (allocation != NULL);
 289
 290   menu_bar = GTK_MENU_BAR (widget);
 291   menu_shell = GTK_MENU_SHELL (widget);
 292
 293   widget->allocation = *allocation;
 294   if (GTK_WIDGET_REALIZED (widget))
 295     gdk_window_move_resize (widget->window,
 296                             allocation->x, allocation->y,
 297                             allocation->width, allocation->height);
 298
 299   if (menu_shell->children)
 300     {
 301       child_allocation.x = (GTK_CONTAINER (menu_bar)->border_width +
 302                             widget->style->xthickness +
 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                             BORDER_SPACING);
 309       child_allocation.height = MAX (1, (gint)allocation->height - child_allocation.y * 2);
 310
 311       children = menu_shell->children;
 312       while (children)
 313         {
 314           gint toggle_size;
 315
 316           child = children->data;
 317           children = children->next;
 318
 319           gtk_menu_item_toggle_size_request (GTK_MENU_ITEM (child),
 320                                              &toggle_size);
 321           gtk_widget_get_child_requisition (child, &child_requisition);
 322
 323           child_requisition.width += toggle_size;
 324
 325           /* Support for the right justified help menu */
 326           if ( (children == NULL) && (GTK_IS_MENU_ITEM(child))
 327               && (GTK_MENU_ITEM(child)->right_justify))
 328             {
 329               child_allocation.x = allocation->width -
 330                   child_requisition.width - CHILD_SPACING - offset;
 331             }
 332           if (GTK_WIDGET_VISIBLE (child))
 333             {
 334               child_allocation.width = child_requisition.width;
 335
 336               gtk_menu_item_toggle_size_allocate (GTK_MENU_ITEM (child),
 337                                                   toggle_size);
 338               gtk_widget_size_allocate (child, &child_allocation);
 339
 340               child_allocation.x += child_allocation.width + CHILD_SPACING * 2;
 341             }
 342         }
 343     }
 344 }
 345
 346 void
 347 gtk_menu_bar_set_shadow_type (GtkMenuBar    *menu_bar,
 348                               GtkShadowType  type)
 349 {
 350   g_return_if_fail (menu_bar != NULL);
 351   g_return_if_fail (GTK_IS_MENU_BAR (menu_bar));
 352
 353   if ((GtkShadowType) menu_bar->shadow_type != type)
 354     {
 355       menu_bar->shadow_type = type;
 356
 357       if (GTK_WIDGET_DRAWABLE (menu_bar))
 358         {
 359           gtk_widget_queue_clear (GTK_WIDGET (menu_bar));
 360         }
 361       gtk_widget_queue_resize (GTK_WIDGET (menu_bar));
 362     }
 363 }
 364
 365 static void
 366 gtk_menu_bar_paint (GtkWidget *widget, GdkRectangle *area)
 367 {
 368   g_return_if_fail (widget != NULL);
 369   g_return_if_fail (GTK_IS_MENU_BAR (widget));
 370
 371   if (GTK_WIDGET_DRAWABLE (widget))
 372     {
 373       gtk_paint_box (widget->style,
 374                      widget->window,
 375                      GTK_STATE_NORMAL,
 376                      GTK_MENU_BAR (widget)->shadow_type,
 377                      area, widget, "menubar",
 378                      0, 0,
 379                      -1,-1);
 380     }
 381 }
 382
 383 static gint
 384 gtk_menu_bar_expose (GtkWidget      *widget,
 385                      GdkEventExpose *event)
 386 {
 387   GtkMenuShell *menu_shell;
 388   GdkEventExpose child_event;
 389   GList *children;
 390   GtkWidget *child;
 391
 392   g_return_val_if_fail (widget != NULL, FALSE);
 393   g_return_val_if_fail (GTK_IS_MENU_BAR (widget), FALSE);
 394   g_return_val_if_fail (event != NULL, FALSE);
 395
 396   if (GTK_WIDGET_DRAWABLE (widget))
 397     {
 398       gtk_menu_bar_paint (widget, &event->area);
 399
 400       menu_shell = GTK_MENU_SHELL (widget);
 401       child_event = *event;
 402
 403       children = menu_shell->children;
 404       while (children)
 405         {
 406           child = children->data;
 407           children = children->next;
 408
 409           if (GTK_WIDGET_NO_WINDOW (child) &&
 410               gtk_widget_intersect (child, &event->area, &child_event.area))
 411             gtk_widget_event (child, (GdkEvent*) &child_event);
 412         }
 413     }
 414
 415   return FALSE;
 416 }