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 #include "gdk/gdkkeysyms.h"
  20 #include "gtkbindings.h"
  21 #include "gtkmain.h"
  22 #include "gtkmenubar.h"
  23 #include "gtkmenuitem.h"
  24
  25
  26 #define BORDER_SPACING  2
  27 #define CHILD_SPACING   3
  28
  29
  30 static void gtk_menu_bar_class_init    (GtkMenuBarClass *klass);
  31 static void gtk_menu_bar_init          (GtkMenuBar      *menu_bar);
  32 static void gtk_menu_bar_size_request  (GtkWidget       *widget,
  33                                         GtkRequisition  *requisition);
  34 static void gtk_menu_bar_size_allocate (GtkWidget       *widget,
  35                                         GtkAllocation   *allocation);
  36 static void gtk_menu_bar_paint         (GtkWidget       *widget);
  37 static void gtk_menu_bar_draw          (GtkWidget       *widget,
  38                                         GdkRectangle    *area);
  39 static gint gtk_menu_bar_expose        (GtkWidget       *widget,
  40                                         GdkEventExpose  *event);
  41
  42
  43 GtkType
  44 gtk_menu_bar_get_type (void)
  45 {
  46   static GtkType menu_bar_type = 0;
  47
  48   if (!menu_bar_type)
  49     {
  50       GtkTypeInfo menu_bar_info =
  51       {
  52         "GtkMenuBar",
  53         sizeof (GtkMenuBar),
  54         sizeof (GtkMenuBarClass),
  55         (GtkClassInitFunc) gtk_menu_bar_class_init,
  56         (GtkObjectInitFunc) gtk_menu_bar_init,
  57         /* reserved_1 */ NULL,
  58         /* reserved_2 */ NULL,
  59         (GtkClassInitFunc) NULL,
  60       };
  61
  62       menu_bar_type = gtk_type_unique (gtk_menu_shell_get_type (), &menu_bar_info);
  63     }
  64
  65   return menu_bar_type;
  66 }
  67
  68 static void
  69 gtk_menu_bar_class_init (GtkMenuBarClass *class)
  70 {
  71   GtkWidgetClass *widget_class;
  72   GtkMenuShellClass *menu_shell_class;
  73
  74   GtkBindingSet *binding_set;
  75
  76   widget_class = (GtkWidgetClass*) class;
  77   menu_shell_class = (GtkMenuShellClass*) class;
  78
  79   widget_class->draw = gtk_menu_bar_draw;
  80   widget_class->size_request = gtk_menu_bar_size_request;
  81   widget_class->size_allocate = gtk_menu_bar_size_allocate;
  82   widget_class->expose_event = gtk_menu_bar_expose;
  83
  84   menu_shell_class->submenu_placement = GTK_TOP_BOTTOM;
  85
  86   binding_set = gtk_binding_set_by_class (class);
  87   gtk_binding_entry_add_signal (binding_set,
  88                                 GDK_Left, 0,
  89                                 "move_current", 1,
  90                                 GTK_TYPE_MENU_DIRECTION_TYPE,
  91                                 GTK_MENU_DIR_PREV);
  92   gtk_binding_entry_add_signal (binding_set,
  93                                 GDK_Right, 0,
  94                                 "move_current", 1,
  95                                 GTK_TYPE_MENU_DIRECTION_TYPE,
  96                                 GTK_MENU_DIR_NEXT);
  97   gtk_binding_entry_add_signal (binding_set,
  98                                 GDK_Up, 0,
  99                                 "move_current", 1,
 100                                 GTK_TYPE_MENU_DIRECTION_TYPE,
 101                                 GTK_MENU_DIR_PARENT);
 102   gtk_binding_entry_add_signal (binding_set,
 103                                 GDK_Down, 0,
 104                                 "move_current", 1,
 105                                 GTK_TYPE_MENU_DIRECTION_TYPE,
 106                                 GTK_MENU_DIR_CHILD);
 107 }
 108
 109 static void
 110 gtk_menu_bar_init (GtkMenuBar *menu_bar)
 111 {
 112 }
 113
 114 GtkWidget*
 115 gtk_menu_bar_new (void)
 116 {
 117   return GTK_WIDGET (gtk_type_new (gtk_menu_bar_get_type ()));
 118 }
 119
 120 void
 121 gtk_menu_bar_append (GtkMenuBar *menu_bar,
 122                      GtkWidget  *child)
 123 {
 124   gtk_menu_shell_append (GTK_MENU_SHELL (menu_bar), child);
 125 }
 126
 127 void
 128 gtk_menu_bar_prepend (GtkMenuBar *menu_bar,
 129                       GtkWidget  *child)
 130 {
 131   gtk_menu_shell_prepend (GTK_MENU_SHELL (menu_bar), child);
 132 }
 133
 134 void
 135 gtk_menu_bar_insert (GtkMenuBar *menu_bar,
 136                      GtkWidget  *child,
 137                      gint        position)
 138 {
 139   gtk_menu_shell_insert (GTK_MENU_SHELL (menu_bar), child, position);
 140 }
 141
 142
 143 static void
 144 gtk_menu_bar_size_request (GtkWidget      *widget,
 145                            GtkRequisition *requisition)
 146 {
 147   GtkMenuBar *menu_bar;
 148   GtkMenuShell *menu_shell;
 149   GtkWidget *child;
 150   GList *children;
 151   gint nchildren;
 152
 153   g_return_if_fail (widget != NULL);
 154   g_return_if_fail (GTK_IS_MENU_BAR (widget));
 155   g_return_if_fail (requisition != NULL);
 156
 157   requisition->width = 0;
 158   requisition->height = 0;
 159
 160   if (GTK_WIDGET_VISIBLE (widget))
 161     {
 162       menu_bar = GTK_MENU_BAR (widget);
 163       menu_shell = GTK_MENU_SHELL (widget);
 164
 165       nchildren = 0;
 166       children = menu_shell->children;
 167
 168       while (children)
 169         {
 170           child = children->data;
 171           children = children->next;
 172
 173           if (GTK_WIDGET_VISIBLE (child))
 174             {
 175               GTK_MENU_ITEM (child)->show_submenu_indicator = FALSE;
 176               gtk_widget_size_request (child, &child->requisition);
 177
 178               requisition->width += child->requisition.width;
 179               requisition->height = MAX (requisition->height, child->requisition.height);
 180               /* Support for the right justified help menu */
 181               if ( (children == NULL) && (GTK_IS_MENU_ITEM(child))
 182                    && (GTK_MENU_ITEM(child)->right_justify))
 183                 {
 184                   requisition->width += CHILD_SPACING;
 185                 }
 186
 187               nchildren += 1;
 188             }
 189         }
 190
 191       requisition->width += (GTK_CONTAINER (menu_bar)->border_width +
 192                              widget->style->klass->xthickness +
 193                              BORDER_SPACING) * 2;
 194       requisition->height += (GTK_CONTAINER (menu_bar)->border_width +
 195                               widget->style->klass->ythickness +
 196                               BORDER_SPACING) * 2;
 197
 198       if (nchildren > 0)
 199         requisition->width += 2 * CHILD_SPACING * (nchildren - 1);
 200     }
 201 }
 202
 203 static void
 204 gtk_menu_bar_size_allocate (GtkWidget     *widget,
 205                             GtkAllocation *allocation)
 206 {
 207   GtkMenuBar *menu_bar;
 208   GtkMenuShell *menu_shell;
 209   GtkWidget *child;
 210   GList *children;
 211   GtkAllocation child_allocation;
 212   guint offset;
 213
 214   g_return_if_fail (widget != NULL);
 215   g_return_if_fail (GTK_IS_MENU_BAR (widget));
 216   g_return_if_fail (allocation != NULL);
 217
 218   menu_bar = GTK_MENU_BAR (widget);
 219   menu_shell = GTK_MENU_SHELL (widget);
 220
 221   widget->allocation = *allocation;
 222   if (GTK_WIDGET_REALIZED (widget))
 223     gdk_window_move_resize (widget->window,
 224                             allocation->x, allocation->y,
 225                             allocation->width, allocation->height);
 226
 227   if (menu_shell->children)
 228     {
 229       child_allocation.x = (GTK_CONTAINER (menu_bar)->border_width +
 230                             widget->style->klass->xthickness +
 231                             BORDER_SPACING);
 232       offset = child_allocation.x;      /* Window edge to menubar start */
 233
 234       child_allocation.y = (GTK_CONTAINER (menu_bar)->border_width +
 235                             widget->style->klass->ythickness +
 236                             BORDER_SPACING);
 237       child_allocation.height = MAX (1, allocation->height - child_allocation.y * 2);
 238
 239       children = menu_shell->children;
 240       while (children)
 241         {
 242           child = children->data;
 243           children = children->next;
 244
 245           /* Support for the right justified help menu */
 246           if ( (children == NULL) && (GTK_IS_MENU_ITEM(child))
 247               && (GTK_MENU_ITEM(child)->right_justify))
 248             {
 249               child_allocation.x = allocation->width -
 250                   child->requisition.width - CHILD_SPACING - offset;
 251             }
 252           if (GTK_WIDGET_VISIBLE (child))
 253             {
 254               child_allocation.width = child->requisition.width;
 255
 256               gtk_widget_size_allocate (child, &child_allocation);
 257
 258               child_allocation.x += child_allocation.width + CHILD_SPACING * 2;
 259             }
 260         }
 261     }
 262 }
 263
 264 static void
 265 gtk_menu_bar_paint (GtkWidget *widget)
 266 {
 267   g_return_if_fail (widget != NULL);
 268   g_return_if_fail (GTK_IS_MENU_BAR (widget));
 269
 270   if (GTK_WIDGET_DRAWABLE (widget))
 271     {
 272       gtk_draw_shadow (widget->style,
 273                        widget->window,
 274                        GTK_STATE_NORMAL,
 275                        GTK_SHADOW_OUT,
 276                        0, 0,
 277                        widget->allocation.width,
 278                        widget->allocation.height);
 279     }
 280 }
 281
 282 static void
 283 gtk_menu_bar_draw (GtkWidget    *widget,
 284                    GdkRectangle *area)
 285 {
 286   GtkMenuShell *menu_shell;
 287   GtkWidget *child;
 288   GdkRectangle child_area;
 289   GList *children;
 290
 291   g_return_if_fail (widget != NULL);
 292   g_return_if_fail (GTK_IS_MENU_BAR (widget));
 293   g_return_if_fail (area != NULL);
 294
 295   if (GTK_WIDGET_DRAWABLE (widget))
 296     {
 297       gtk_menu_bar_paint (widget);
 298
 299       menu_shell = GTK_MENU_SHELL (widget);
 300
 301       children = menu_shell->children;
 302       while (children)
 303         {
 304           child = children->data;
 305           children = children->next;
 306
 307           if (gtk_widget_intersect (child, area, &child_area))
 308             gtk_widget_draw (child, &child_area);
 309         }
 310     }
 311 }
 312
 313 static gint
 314 gtk_menu_bar_expose (GtkWidget      *widget,
 315                      GdkEventExpose *event)
 316 {
 317   GtkMenuShell *menu_shell;
 318   GtkWidget *child;
 319   GdkEventExpose child_event;
 320   GList *children;
 321
 322   g_return_val_if_fail (widget != NULL, FALSE);
 323   g_return_val_if_fail (GTK_IS_MENU_BAR (widget), FALSE);
 324   g_return_val_if_fail (event != NULL, FALSE);
 325
 326   if (GTK_WIDGET_DRAWABLE (widget))
 327     {
 328       gtk_menu_bar_paint (widget);
 329
 330       menu_shell = GTK_MENU_SHELL (widget);
 331       child_event = *event;
 332
 333       children = menu_shell->children;
 334       while (children)
 335         {
 336           child = children->data;
 337           children = children->next;
 338
 339           if (GTK_WIDGET_NO_WINDOW (child) &&
 340               gtk_widget_intersect (child, &event->area, &child_event.area))
 341             gtk_widget_event (child, (GdkEvent*) &child_event);
 342         }
 343     }
 344
 345   return FALSE;
 346 }