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 static GtkMenuShellClass *parent_class = NULL;
  62
  63 GtkType
  64 gtk_menu_bar_get_type (void)
  65 {
  66   static GtkType menu_bar_type = 0;
  67
  68   if (!menu_bar_type)
  69     {
  70       static const GtkTypeInfo menu_bar_info =
  71       {
  72         "GtkMenuBar",
  73         sizeof (GtkMenuBar),
  74         sizeof (GtkMenuBarClass),
  75         (GtkClassInitFunc) gtk_menu_bar_class_init,
  76         (GtkObjectInitFunc) gtk_menu_bar_init,
  77         /* reserved_1 */ NULL,
  78         /* reserved_2 */ NULL,
  79         (GtkClassInitFunc) NULL,
  80       };
  81
  82       menu_bar_type = gtk_type_unique (gtk_menu_shell_get_type (), &menu_bar_info);
  83     }
  84
  85   return menu_bar_type;
  86 }
  87
  88 static void
  89 gtk_menu_bar_class_init (GtkMenuBarClass *class)
  90 {
  91   GtkObjectClass *object_class;
  92   GtkWidgetClass *widget_class;
  93   GtkMenuShellClass *menu_shell_class;
  94
  95   GtkBindingSet *binding_set;
  96
  97   parent_class = g_type_class_peek_parent (class);
  98
  99   object_class = (GtkObjectClass*) class;
 100   widget_class = (GtkWidgetClass*) class;
 101   menu_shell_class = (GtkMenuShellClass*) class;
 102
 103   gtk_object_add_arg_type ("GtkMenuBar::shadow", GTK_TYPE_SHADOW_TYPE, GTK_ARG_READWRITE, ARG_SHADOW);
 104
 105   object_class->set_arg = gtk_menu_bar_set_arg;
 106   object_class->get_arg = gtk_menu_bar_get_arg;
 107
 108   widget_class->size_request = gtk_menu_bar_size_request;
 109   widget_class->size_allocate = gtk_menu_bar_size_allocate;
 110   widget_class->expose_event = gtk_menu_bar_expose;
 111
 112   menu_shell_class->submenu_placement = GTK_TOP_BOTTOM;
 113
 114   binding_set = gtk_binding_set_by_class (class);
 115   gtk_binding_entry_add_signal (binding_set,
 116                                 GDK_Left, 0,
 117                                 "move_current", 1,
 118                                 GTK_TYPE_MENU_DIRECTION_TYPE,
 119                                 GTK_MENU_DIR_PREV);
 120   gtk_binding_entry_add_signal (binding_set,
 121                                 GDK_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_Down, 0,
 132                                 "move_current", 1,
 133                                 GTK_TYPE_MENU_DIRECTION_TYPE,
 134                                 GTK_MENU_DIR_CHILD);
 135 }
 136
 137 static void
 138 gtk_menu_bar_init (GtkMenuBar *menu_bar)
 139 {
 140   menu_bar->shadow_type = GTK_SHADOW_OUT;
 141 }
 142
 143 static void
 144 gtk_menu_bar_set_arg (GtkObject      *object,
 145                       GtkArg         *arg,
 146                       guint           arg_id)
 147 {
 148   GtkMenuBar *menu_bar;
 149
 150   menu_bar = GTK_MENU_BAR (object);
 151
 152   switch (arg_id)
 153     {
 154     case ARG_SHADOW:
 155       gtk_menu_bar_set_shadow_type (menu_bar, GTK_VALUE_ENUM (*arg));
 156       break;
 157     default:
 158       break;
 159     }
 160 }
 161
 162 static void
 163 gtk_menu_bar_get_arg (GtkObject      *object,
 164                       GtkArg         *arg,
 165                       guint           arg_id)
 166 {
 167   GtkMenuBar *menu_bar;
 168
 169   menu_bar = GTK_MENU_BAR (object);
 170
 171   switch (arg_id)
 172     {
 173     case ARG_SHADOW:
 174       GTK_VALUE_ENUM (*arg) = menu_bar->shadow_type;
 175       break;
 176     default:
 177       arg->type = GTK_TYPE_INVALID;
 178       break;
 179     }
 180 }
 181
 182 GtkWidget*
 183 gtk_menu_bar_new (void)
 184 {
 185   return GTK_WIDGET (gtk_type_new (gtk_menu_bar_get_type ()));
 186 }
 187
 188 void
 189 gtk_menu_bar_append (GtkMenuBar *menu_bar,
 190                      GtkWidget  *child)
 191 {
 192   gtk_menu_shell_append (GTK_MENU_SHELL (menu_bar), child);
 193 }
 194
 195 void
 196 gtk_menu_bar_prepend (GtkMenuBar *menu_bar,
 197                       GtkWidget  *child)
 198 {
 199   gtk_menu_shell_prepend (GTK_MENU_SHELL (menu_bar), child);
 200 }
 201
 202 void
 203 gtk_menu_bar_insert (GtkMenuBar *menu_bar,
 204                      GtkWidget  *child,
 205                      gint        position)
 206 {
 207   gtk_menu_shell_insert (GTK_MENU_SHELL (menu_bar), child, position);
 208 }
 209
 210
 211 static void
 212 gtk_menu_bar_size_request (GtkWidget      *widget,
 213                            GtkRequisition *requisition)
 214 {
 215   GtkMenuBar *menu_bar;
 216   GtkMenuShell *menu_shell;
 217   GtkWidget *child;
 218   GList *children;
 219   gint nchildren;
 220   GtkRequisition child_requisition;
 221
 222   g_return_if_fail (widget != NULL);
 223   g_return_if_fail (GTK_IS_MENU_BAR (widget));
 224   g_return_if_fail (requisition != NULL);
 225
 226   requisition->width = 0;
 227   requisition->height = 0;
 228
 229   if (GTK_WIDGET_VISIBLE (widget))
 230     {
 231       menu_bar = GTK_MENU_BAR (widget);
 232       menu_shell = GTK_MENU_SHELL (widget);
 233
 234       nchildren = 0;
 235       children = menu_shell->children;
 236
 237       while (children)
 238         {
 239           child = children->data;
 240           children = children->next;
 241
 242           if (GTK_WIDGET_VISIBLE (child))
 243             {
 244               gint toggle_size;
 245
 246               GTK_MENU_ITEM (child)->show_submenu_indicator = FALSE;
 247               gtk_widget_size_request (child, &child_requisition);
 248               gtk_menu_item_toggle_size_request (GTK_MENU_ITEM (child),
 249                                                  &toggle_size);
 250
 251               requisition->width += child_requisition.width;
 252               requisition->width += toggle_size;
 253
 254               requisition->height = MAX (requisition->height, child_requisition.height);
 255               /* Support for the right justified help menu */
 256               if ((children == NULL) && GTK_IS_MENU_ITEM(child) &&
 257                   GTK_MENU_ITEM(child)->right_justify)
 258                 {
 259                   requisition->width += CHILD_SPACING;
 260                 }
 261
 262               nchildren += 1;
 263             }
 264         }
 265
 266       requisition->width += (GTK_CONTAINER (menu_bar)->border_width +
 267                              widget->style->xthickness +
 268                              BORDER_SPACING) * 2;
 269       requisition->height += (GTK_CONTAINER (menu_bar)->border_width +
 270                               widget->style->ythickness +
 271                               BORDER_SPACING) * 2;
 272
 273       if (nchildren > 0)
 274         requisition->width += 2 * CHILD_SPACING * (nchildren - 1);
 275     }
 276 }
 277
 278 static void
 279 gtk_menu_bar_size_allocate (GtkWidget     *widget,
 280                             GtkAllocation *allocation)
 281 {
 282   GtkMenuBar *menu_bar;
 283   GtkMenuShell *menu_shell;
 284   GtkWidget *child;
 285   GList *children;
 286   GtkAllocation child_allocation;
 287   GtkRequisition child_requisition;
 288   guint offset;
 289
 290   g_return_if_fail (widget != NULL);
 291   g_return_if_fail (GTK_IS_MENU_BAR (widget));
 292   g_return_if_fail (allocation != NULL);
 293
 294   menu_bar = GTK_MENU_BAR (widget);
 295   menu_shell = GTK_MENU_SHELL (widget);
 296
 297   widget->allocation = *allocation;
 298   if (GTK_WIDGET_REALIZED (widget))
 299     gdk_window_move_resize (widget->window,
 300                             allocation->x, allocation->y,
 301                             allocation->width, allocation->height);
 302
 303   if (menu_shell->children)
 304     {
 305       child_allocation.x = (GTK_CONTAINER (menu_bar)->border_width +
 306                             widget->style->xthickness +
 307                             BORDER_SPACING);
 308       offset = child_allocation.x;      /* Window edge to menubar start */
 309
 310       child_allocation.y = (GTK_CONTAINER (menu_bar)->border_width +
 311                             widget->style->ythickness +
 312                             BORDER_SPACING);
 313       child_allocation.height = MAX (1, (gint)allocation->height - child_allocation.y * 2);
 314
 315       children = menu_shell->children;
 316       while (children)
 317         {
 318           gint toggle_size;
 319
 320           child = children->data;
 321           children = children->next;
 322
 323           gtk_menu_item_toggle_size_request (GTK_MENU_ITEM (child),
 324                                              &toggle_size);
 325           gtk_widget_get_child_requisition (child, &child_requisition);
 326
 327           child_requisition.width += toggle_size;
 328
 329           /* Support for the right justified help menu */
 330           if ( (children == NULL) && (GTK_IS_MENU_ITEM(child))
 331               && (GTK_MENU_ITEM(child)->right_justify))
 332             {
 333               child_allocation.x = allocation->width -
 334                   child_requisition.width - CHILD_SPACING - offset;
 335             }
 336           if (GTK_WIDGET_VISIBLE (child))
 337             {
 338               child_allocation.width = child_requisition.width;
 339
 340               gtk_menu_item_toggle_size_allocate (GTK_MENU_ITEM (child),
 341                                                   toggle_size);
 342               gtk_widget_size_allocate (child, &child_allocation);
 343
 344               child_allocation.x += child_allocation.width + CHILD_SPACING * 2;
 345             }
 346         }
 347     }
 348 }
 349
 350 void
 351 gtk_menu_bar_set_shadow_type (GtkMenuBar    *menu_bar,
 352                               GtkShadowType  type)
 353 {
 354   g_return_if_fail (menu_bar != NULL);
 355   g_return_if_fail (GTK_IS_MENU_BAR (menu_bar));
 356
 357   if ((GtkShadowType) menu_bar->shadow_type != type)
 358     {
 359       menu_bar->shadow_type = type;
 360
 361       if (GTK_WIDGET_DRAWABLE (menu_bar))
 362         {
 363           gtk_widget_queue_clear (GTK_WIDGET (menu_bar));
 364         }
 365       gtk_widget_queue_resize (GTK_WIDGET (menu_bar));
 366     }
 367 }
 368
 369 static void
 370 gtk_menu_bar_paint (GtkWidget *widget, GdkRectangle *area)
 371 {
 372   g_return_if_fail (widget != NULL);
 373   g_return_if_fail (GTK_IS_MENU_BAR (widget));
 374
 375   if (GTK_WIDGET_DRAWABLE (widget))
 376     {
 377       gtk_paint_box (widget->style,
 378                      widget->window,
 379                      GTK_STATE_NORMAL,
 380                      GTK_MENU_BAR (widget)->shadow_type,
 381                      area, widget, "menubar",
 382                      0, 0,
 383                      -1,-1);
 384     }
 385 }
 386
 387 static gint
 388 gtk_menu_bar_expose (GtkWidget      *widget,
 389                      GdkEventExpose *event)
 390 {
 391   g_return_val_if_fail (widget != NULL, FALSE);
 392   g_return_val_if_fail (GTK_IS_MENU_BAR (widget), FALSE);
 393   g_return_val_if_fail (event != NULL, FALSE);
 394
 395   if (GTK_WIDGET_DRAWABLE (widget))
 396     {
 397       gtk_menu_bar_paint (widget, &event->area);
 398
 399       (* GTK_WIDGET_CLASS (parent_class)->expose_event) (widget, event);
 400     }
 401
 402   return FALSE;
 403 }