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 Library 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  * Library General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Library 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 1997-1999.  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 void gtk_menu_bar_draw          (GtkWidget       *widget,
  58                                         GdkRectangle    *area);
  59 static gint gtk_menu_bar_expose        (GtkWidget       *widget,
  60                                         GdkEventExpose  *event);
  61
  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   object_class = (GtkObjectClass*) class;
  98   widget_class = (GtkWidgetClass*) class;
  99   menu_shell_class = (GtkMenuShellClass*) class;
 100
 101   gtk_object_add_arg_type ("GtkMenuBar::shadow", GTK_TYPE_SHADOW_TYPE, GTK_ARG_READWRITE, ARG_SHADOW);
 102
 103   object_class->set_arg = gtk_menu_bar_set_arg;
 104   object_class->get_arg = gtk_menu_bar_get_arg;
 105
 106   widget_class->draw = gtk_menu_bar_draw;
 107   widget_class->size_request = gtk_menu_bar_size_request;
 108   widget_class->size_allocate = gtk_menu_bar_size_allocate;
 109   widget_class->expose_event = gtk_menu_bar_expose;
 110
 111   menu_shell_class->submenu_placement = GTK_TOP_BOTTOM;
 112
 113   binding_set = gtk_binding_set_by_class (class);
 114   gtk_binding_entry_add_signal (binding_set,
 115                                 GDK_Left, 0,
 116                                 "move_current", 1,
 117                                 GTK_TYPE_MENU_DIRECTION_TYPE,
 118                                 GTK_MENU_DIR_PREV);
 119   gtk_binding_entry_add_signal (binding_set,
 120                                 GDK_Right, 0,
 121                                 "move_current", 1,
 122                                 GTK_TYPE_MENU_DIRECTION_TYPE,
 123                                 GTK_MENU_DIR_NEXT);
 124   gtk_binding_entry_add_signal (binding_set,
 125                                 GDK_Up, 0,
 126                                 "move_current", 1,
 127                                 GTK_TYPE_MENU_DIRECTION_TYPE,
 128                                 GTK_MENU_DIR_PARENT);
 129   gtk_binding_entry_add_signal (binding_set,
 130                                 GDK_Down, 0,
 131                                 "move_current", 1,
 132                                 GTK_TYPE_MENU_DIRECTION_TYPE,
 133                                 GTK_MENU_DIR_CHILD);
 134 }
 135
 136 static void
 137 gtk_menu_bar_init (GtkMenuBar *menu_bar)
 138 {
 139   menu_bar->shadow_type = GTK_SHADOW_OUT;
 140 }
 141
 142 static void
 143 gtk_menu_bar_set_arg (GtkObject      *object,
 144                       GtkArg         *arg,
 145                       guint           arg_id)
 146 {
 147   GtkMenuBar *menu_bar;
 148
 149   menu_bar = GTK_MENU_BAR (object);
 150
 151   switch (arg_id)
 152     {
 153     case ARG_SHADOW:
 154       gtk_menu_bar_set_shadow_type (menu_bar, GTK_VALUE_ENUM (*arg));
 155       break;
 156     default:
 157       break;
 158     }
 159 }
 160
 161 static void
 162 gtk_menu_bar_get_arg (GtkObject      *object,
 163                       GtkArg         *arg,
 164                       guint           arg_id)
 165 {
 166   GtkMenuBar *menu_bar;
 167
 168   menu_bar = GTK_MENU_BAR (object);
 169
 170   switch (arg_id)
 171     {
 172     case ARG_SHADOW:
 173       GTK_VALUE_ENUM (*arg) = menu_bar->shadow_type;
 174       break;
 175     default:
 176       arg->type = GTK_TYPE_INVALID;
 177       break;
 178     }
 179 }
 180
 181 GtkWidget*
 182 gtk_menu_bar_new (void)
 183 {
 184   return GTK_WIDGET (gtk_type_new (gtk_menu_bar_get_type ()));
 185 }
 186
 187 void
 188 gtk_menu_bar_append (GtkMenuBar *menu_bar,
 189                      GtkWidget  *child)
 190 {
 191   gtk_menu_shell_append (GTK_MENU_SHELL (menu_bar), child);
 192 }
 193
 194 void
 195 gtk_menu_bar_prepend (GtkMenuBar *menu_bar,
 196                       GtkWidget  *child)
 197 {
 198   gtk_menu_shell_prepend (GTK_MENU_SHELL (menu_bar), child);
 199 }
 200
 201 void
 202 gtk_menu_bar_insert (GtkMenuBar *menu_bar,
 203                      GtkWidget  *child,
 204                      gint        position)
 205 {
 206   gtk_menu_shell_insert (GTK_MENU_SHELL (menu_bar), child, position);
 207 }
 208
 209
 210 static void
 211 gtk_menu_bar_size_request (GtkWidget      *widget,
 212                            GtkRequisition *requisition)
 213 {
 214   GtkMenuBar *menu_bar;
 215   GtkMenuShell *menu_shell;
 216   GtkWidget *child;
 217   GList *children;
 218   gint nchildren;
 219   GtkRequisition child_requisition;
 220
 221   g_return_if_fail (widget != NULL);
 222   g_return_if_fail (GTK_IS_MENU_BAR (widget));
 223   g_return_if_fail (requisition != NULL);
 224
 225   requisition->width = 0;
 226   requisition->height = 0;
 227
 228   if (GTK_WIDGET_VISIBLE (widget))
 229     {
 230       menu_bar = GTK_MENU_BAR (widget);
 231       menu_shell = GTK_MENU_SHELL (widget);
 232
 233       nchildren = 0;
 234       children = menu_shell->children;
 235
 236       while (children)
 237         {
 238           child = children->data;
 239           children = children->next;
 240
 241           if (GTK_WIDGET_VISIBLE (child))
 242             {
 243               GTK_MENU_ITEM (child)->show_submenu_indicator = FALSE;
 244               gtk_widget_size_request (child, &child_requisition);
 245
 246               requisition->width += child_requisition.width;
 247               requisition->height = MAX (requisition->height, child_requisition.height);
 248               /* Support for the right justified help menu */
 249               if ((children == NULL) && GTK_IS_MENU_ITEM(child) &&
 250                   GTK_MENU_ITEM(child)->right_justify)
 251                 {
 252                   requisition->width += CHILD_SPACING;
 253                 }
 254
 255               nchildren += 1;
 256             }
 257         }
 258
 259       requisition->width += (GTK_CONTAINER (menu_bar)->border_width +
 260                              widget->style->klass->xthickness +
 261                              BORDER_SPACING) * 2;
 262       requisition->height += (GTK_CONTAINER (menu_bar)->border_width +
 263                               widget->style->klass->ythickness +
 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
 283   g_return_if_fail (widget != NULL);
 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   if (menu_shell->children)
 297     {
 298       child_allocation.x = (GTK_CONTAINER (menu_bar)->border_width +
 299                             widget->style->klass->xthickness +
 300                             BORDER_SPACING);
 301       offset = child_allocation.x;      /* Window edge to menubar start */
 302
 303       child_allocation.y = (GTK_CONTAINER (menu_bar)->border_width +
 304                             widget->style->klass->ythickness +
 305                             BORDER_SPACING);
 306       child_allocation.height = MAX (1, (gint)allocation->height - child_allocation.y * 2);
 307
 308       children = menu_shell->children;
 309       while (children)
 310         {
 311           child = children->data;
 312           children = children->next;
 313
 314           gtk_widget_get_child_requisition (child, &child_requisition);
 315
 316           /* Support for the right justified help menu */
 317           if ( (children == NULL) && (GTK_IS_MENU_ITEM(child))
 318               && (GTK_MENU_ITEM(child)->right_justify))
 319             {
 320               child_allocation.x = allocation->width -
 321                   child_requisition.width - CHILD_SPACING - offset;
 322             }
 323           if (GTK_WIDGET_VISIBLE (child))
 324             {
 325               child_allocation.width = child_requisition.width;
 326
 327               gtk_widget_size_allocate (child, &child_allocation);
 328
 329               child_allocation.x += child_allocation.width + CHILD_SPACING * 2;
 330             }
 331         }
 332     }
 333 }
 334
 335 void
 336 gtk_menu_bar_set_shadow_type (GtkMenuBar    *menu_bar,
 337                               GtkShadowType  type)
 338 {
 339   g_return_if_fail (menu_bar != NULL);
 340   g_return_if_fail (GTK_IS_MENU_BAR (menu_bar));
 341
 342   if ((GtkShadowType) menu_bar->shadow_type != type)
 343     {
 344       menu_bar->shadow_type = type;
 345
 346       if (GTK_WIDGET_DRAWABLE (menu_bar))
 347         {
 348           gtk_widget_queue_clear (GTK_WIDGET (menu_bar));
 349         }
 350       gtk_widget_queue_resize (GTK_WIDGET (menu_bar));
 351     }
 352 }
 353
 354 static void
 355 gtk_menu_bar_paint (GtkWidget *widget, GdkRectangle *area)
 356 {
 357   g_return_if_fail (widget != NULL);
 358   g_return_if_fail (GTK_IS_MENU_BAR (widget));
 359
 360   if (GTK_WIDGET_DRAWABLE (widget))
 361     {
 362       gtk_paint_box (widget->style,
 363                      widget->window,
 364                      GTK_STATE_NORMAL,
 365                      GTK_MENU_BAR (widget)->shadow_type,
 366                      area, widget, "menubar",
 367                      0, 0,
 368                      -1,-1);
 369     }
 370 }
 371
 372 static void
 373 gtk_menu_bar_draw (GtkWidget    *widget,
 374                    GdkRectangle *area)
 375 {
 376   GtkMenuShell *menu_shell;
 377   GtkWidget *child;
 378   GdkRectangle child_area;
 379   GList *children;
 380
 381   g_return_if_fail (widget != NULL);
 382   g_return_if_fail (GTK_IS_MENU_BAR (widget));
 383   g_return_if_fail (area != NULL);
 384
 385   if (GTK_WIDGET_DRAWABLE (widget))
 386     {
 387       gtk_menu_bar_paint (widget, area);
 388
 389       menu_shell = GTK_MENU_SHELL (widget);
 390
 391       children = menu_shell->children;
 392       while (children)
 393         {
 394           child = children->data;
 395           children = children->next;
 396
 397           if (gtk_widget_intersect (child, area, &child_area))
 398             gtk_widget_draw (child, &child_area);
 399         }
 400     }
 401 }
 402
 403 static gint
 404 gtk_menu_bar_expose (GtkWidget      *widget,
 405                      GdkEventExpose *event)
 406 {
 407   GtkMenuShell *menu_shell;
 408   GdkEventExpose child_event;
 409   GList *children;
 410   GtkWidget *child;
 411
 412   g_return_val_if_fail (widget != NULL, FALSE);
 413   g_return_val_if_fail (GTK_IS_MENU_BAR (widget), FALSE);
 414   g_return_val_if_fail (event != NULL, FALSE);
 415
 416   if (GTK_WIDGET_DRAWABLE (widget))
 417     {
 418       gtk_menu_bar_paint (widget, &event->area);
 419
 420       menu_shell = GTK_MENU_SHELL (widget);
 421       child_event = *event;
 422
 423       children = menu_shell->children;
 424       while (children)
 425         {
 426           child = children->data;
 427           children = children->next;
 428
 429           if (GTK_WIDGET_NO_WINDOW (child) &&
 430               gtk_widget_intersect (child, &event->area, &child_event.area))
 431             gtk_widget_event (child, (GdkEvent*) &child_event);
 432         }
 433     }
 434
 435   return FALSE;
 436 }