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                                         GdkRectangle    *area);
  38 static void gtk_menu_bar_draw          (GtkWidget       *widget,
  39                                         GdkRectangle    *area);
  40 static gint gtk_menu_bar_expose        (GtkWidget       *widget,
  41                                         GdkEventExpose  *event);
  42
  43
  44 GtkType
  45 gtk_menu_bar_get_type (void)
  46 {
  47   static GtkType menu_bar_type = 0;
  48
  49   if (!menu_bar_type)
  50     {
  51       GtkTypeInfo menu_bar_info =
  52       {
  53         "GtkMenuBar",
  54         sizeof (GtkMenuBar),
  55         sizeof (GtkMenuBarClass),
  56         (GtkClassInitFunc) gtk_menu_bar_class_init,
  57         (GtkObjectInitFunc) gtk_menu_bar_init,
  58         /* reserved_1 */ NULL,
  59         /* reserved_2 */ NULL,
  60         (GtkClassInitFunc) NULL,
  61       };
  62
  63       menu_bar_type = gtk_type_unique (gtk_menu_shell_get_type (), &menu_bar_info);
  64     }
  65
  66   return menu_bar_type;
  67 }
  68
  69 static void
  70 gtk_menu_bar_class_init (GtkMenuBarClass *class)
  71 {
  72   GtkWidgetClass *widget_class;
  73   GtkMenuShellClass *menu_shell_class;
  74
  75   GtkBindingSet *binding_set;
  76
  77   widget_class = (GtkWidgetClass*) class;
  78   menu_shell_class = (GtkMenuShellClass*) class;
  79
  80   widget_class->draw = gtk_menu_bar_draw;
  81   widget_class->size_request = gtk_menu_bar_size_request;
  82   widget_class->size_allocate = gtk_menu_bar_size_allocate;
  83   widget_class->expose_event = gtk_menu_bar_expose;
  84
  85   menu_shell_class->submenu_placement = GTK_TOP_BOTTOM;
  86
  87   binding_set = gtk_binding_set_by_class (class);
  88   gtk_binding_entry_add_signal (binding_set,
  89                                 GDK_Left, 0,
  90                                 "move_current", 1,
  91                                 GTK_TYPE_MENU_DIRECTION_TYPE,
  92                                 GTK_MENU_DIR_PREV);
  93   gtk_binding_entry_add_signal (binding_set,
  94                                 GDK_Right, 0,
  95                                 "move_current", 1,
  96                                 GTK_TYPE_MENU_DIRECTION_TYPE,
  97                                 GTK_MENU_DIR_NEXT);
  98   gtk_binding_entry_add_signal (binding_set,
  99                                 GDK_Up, 0,
 100                                 "move_current", 1,
 101                                 GTK_TYPE_MENU_DIRECTION_TYPE,
 102                                 GTK_MENU_DIR_PARENT);
 103   gtk_binding_entry_add_signal (binding_set,
 104                                 GDK_Down, 0,
 105                                 "move_current", 1,
 106                                 GTK_TYPE_MENU_DIRECTION_TYPE,
 107                                 GTK_MENU_DIR_CHILD);
 108 }
 109
 110 static void
 111 gtk_menu_bar_init (GtkMenuBar *menu_bar)
 112 {
 113 }
 114
 115 GtkWidget*
 116 gtk_menu_bar_new (void)
 117 {
 118   return GTK_WIDGET (gtk_type_new (gtk_menu_bar_get_type ()));
 119 }
 120
 121 void
 122 gtk_menu_bar_append (GtkMenuBar *menu_bar,
 123                      GtkWidget  *child)
 124 {
 125   gtk_menu_shell_append (GTK_MENU_SHELL (menu_bar), child);
 126 }
 127
 128 void
 129 gtk_menu_bar_prepend (GtkMenuBar *menu_bar,
 130                       GtkWidget  *child)
 131 {
 132   gtk_menu_shell_prepend (GTK_MENU_SHELL (menu_bar), child);
 133 }
 134
 135 void
 136 gtk_menu_bar_insert (GtkMenuBar *menu_bar,
 137                      GtkWidget  *child,
 138                      gint        position)
 139 {
 140   gtk_menu_shell_insert (GTK_MENU_SHELL (menu_bar), child, position);
 141 }
 142
 143
 144 static void
 145 gtk_menu_bar_size_request (GtkWidget      *widget,
 146                            GtkRequisition *requisition)
 147 {
 148   GtkMenuBar *menu_bar;
 149   GtkMenuShell *menu_shell;
 150   GtkWidget *child;
 151   GList *children;
 152   gint nchildren;
 153
 154   g_return_if_fail (widget != NULL);
 155   g_return_if_fail (GTK_IS_MENU_BAR (widget));
 156   g_return_if_fail (requisition != NULL);
 157
 158   requisition->width = 0;
 159   requisition->height = 0;
 160
 161   if (GTK_WIDGET_VISIBLE (widget))
 162     {
 163       menu_bar = GTK_MENU_BAR (widget);
 164       menu_shell = GTK_MENU_SHELL (widget);
 165
 166       nchildren = 0;
 167       children = menu_shell->children;
 168
 169       while (children)
 170         {
 171           child = children->data;
 172           children = children->next;
 173
 174           if (GTK_WIDGET_VISIBLE (child))
 175             {
 176               GTK_MENU_ITEM (child)->show_submenu_indicator = FALSE;
 177               gtk_widget_size_request (child, &child->requisition);
 178
 179               requisition->width += child->requisition.width;
 180               requisition->height = MAX (requisition->height, child->requisition.height);
 181               /* Support for the right justified help menu */
 182               if ( (children == NULL) && (GTK_IS_MENU_ITEM(child))
 183                    && (GTK_MENU_ITEM(child)->right_justify))
 184                 {
 185                   requisition->width += CHILD_SPACING;
 186                 }
 187
 188               nchildren += 1;
 189             }
 190         }
 191
 192       requisition->width += (GTK_CONTAINER (menu_bar)->border_width +
 193                              widget->style->klass->xthickness +
 194                              BORDER_SPACING) * 2;
 195       requisition->height += (GTK_CONTAINER (menu_bar)->border_width +
 196                               widget->style->klass->ythickness +
 197                               BORDER_SPACING) * 2;
 198
 199       if (nchildren > 0)
 200         requisition->width += 2 * CHILD_SPACING * (nchildren - 1);
 201     }
 202 }
 203
 204 static void
 205 gtk_menu_bar_size_allocate (GtkWidget     *widget,
 206                             GtkAllocation *allocation)
 207 {
 208   GtkMenuBar *menu_bar;
 209   GtkMenuShell *menu_shell;
 210   GtkWidget *child;
 211   GList *children;
 212   GtkAllocation child_allocation;
 213   guint offset;
 214
 215   g_return_if_fail (widget != NULL);
 216   g_return_if_fail (GTK_IS_MENU_BAR (widget));
 217   g_return_if_fail (allocation != NULL);
 218
 219   menu_bar = GTK_MENU_BAR (widget);
 220   menu_shell = GTK_MENU_SHELL (widget);
 221
 222   widget->allocation = *allocation;
 223   if (GTK_WIDGET_REALIZED (widget))
 224     gdk_window_move_resize (widget->window,
 225                             allocation->x, allocation->y,
 226                             allocation->width, allocation->height);
 227
 228   if (menu_shell->children)
 229     {
 230       child_allocation.x = (GTK_CONTAINER (menu_bar)->border_width +
 231                             widget->style->klass->xthickness +
 232                             BORDER_SPACING);
 233       offset = child_allocation.x;      /* Window edge to menubar start */
 234
 235       child_allocation.y = (GTK_CONTAINER (menu_bar)->border_width +
 236                             widget->style->klass->ythickness +
 237                             BORDER_SPACING);
 238       child_allocation.height = MAX (1, allocation->height - child_allocation.y * 2);
 239
 240       children = menu_shell->children;
 241       while (children)
 242         {
 243           child = children->data;
 244           children = children->next;
 245
 246           /* Support for the right justified help menu */
 247           if ( (children == NULL) && (GTK_IS_MENU_ITEM(child))
 248               && (GTK_MENU_ITEM(child)->right_justify))
 249             {
 250               child_allocation.x = allocation->width -
 251                   child->requisition.width - CHILD_SPACING - offset;
 252             }
 253           if (GTK_WIDGET_VISIBLE (child))
 254             {
 255               child_allocation.width = child->requisition.width;
 256
 257               gtk_widget_size_allocate (child, &child_allocation);
 258
 259               child_allocation.x += child_allocation.width + CHILD_SPACING * 2;
 260             }
 261         }
 262     }
 263 }
 264
 265 static void
 266 gtk_menu_bar_paint (GtkWidget *widget, GdkRectangle *area)
 267 {
 268   g_return_if_fail (widget != NULL);
 269   g_return_if_fail (GTK_IS_MENU_BAR (widget));
 270
 271   if (GTK_WIDGET_DRAWABLE (widget))
 272     {
 273       gtk_paint_box (widget->style,
 274                      widget->window,
 275                      GTK_STATE_NORMAL,
 276                      GTK_SHADOW_OUT,
 277                      area, widget, "menubar",
 278                      0, 0,
 279                      -1,-1);
 280     }
 281 }
 282
 283 static void
 284 gtk_menu_bar_draw (GtkWidget    *widget,
 285                    GdkRectangle *area)
 286 {
 287   GtkMenuShell *menu_shell;
 288   GtkWidget *child;
 289   GdkRectangle child_area;
 290   GList *children;
 291
 292   g_return_if_fail (widget != NULL);
 293   g_return_if_fail (GTK_IS_MENU_BAR (widget));
 294   g_return_if_fail (area != NULL);
 295
 296   if (GTK_WIDGET_DRAWABLE (widget))
 297     {
 298       gtk_menu_bar_paint (widget, area);
 299
 300       menu_shell = GTK_MENU_SHELL (widget);
 301
 302       children = menu_shell->children;
 303       while (children)
 304         {
 305           child = children->data;
 306           children = children->next;
 307
 308           if (gtk_widget_intersect (child, area, &child_area))
 309             gtk_widget_draw (child, &child_area);
 310         }
 311     }
 312 }
 313
 314 static gint
 315 gtk_menu_bar_expose (GtkWidget      *widget,
 316                      GdkEventExpose *event)
 317 {
 318   GtkMenuShell *menu_shell;
 319   GdkEventExpose child_event;
 320   GList *children;
 321   GtkWidget *child;
 322
 323   g_return_val_if_fail (widget != NULL, FALSE);
 324   g_return_val_if_fail (GTK_IS_MENU_BAR (widget), FALSE);
 325   g_return_val_if_fail (event != NULL, FALSE);
 326
 327   if (GTK_WIDGET_DRAWABLE (widget))
 328     {
 329       gtk_menu_bar_paint (widget, &event->area);
 330
 331       menu_shell = GTK_MENU_SHELL (widget);
 332       child_event = *event;
 333
 334       children = menu_shell->children;
 335       while (children)
 336         {
 337           child = children->data;
 338           children = children->next;
 339
 340           if (GTK_WIDGET_NO_WINDOW (child) &&
 341               gtk_widget_intersect (child, &event->area, &child_event.area))
 342             gtk_widget_event (child, (GdkEvent*) &child_event);
 343         }
 344     }
 345
 346   return FALSE;
 347 }