Pileus Git - ~andy/gtk/blob - gtk/gtktearoffmenuitem.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 <config.h>
  28 #include "gtkmenu.h"
  29 #include "gtktearoffmenuitem.h"
  30
  31 #define ARROW_SIZE 10
  32 #define TEAR_LENGTH 5
  33 #define BORDER_SPACING  3
  34
  35 static void gtk_tearoff_menu_item_class_init (GtkTearoffMenuItemClass *klass);
  36 static void gtk_tearoff_menu_item_init       (GtkTearoffMenuItem      *tearoff_menu_item);
  37 static void gtk_tearoff_menu_item_size_request (GtkWidget             *widget,
  38                                                 GtkRequisition        *requisition);
  39 static gint gtk_tearoff_menu_item_expose     (GtkWidget             *widget,
  40                                               GdkEventExpose        *event);
  41 static void gtk_tearoff_menu_item_activate   (GtkMenuItem           *menu_item);
  42 static void gtk_tearoff_menu_item_parent_set (GtkWidget             *widget,
  43                                               GtkWidget             *previous);
  44
  45 GType
  46 gtk_tearoff_menu_item_get_type (void)
  47 {
  48   static GType tearoff_menu_item_type = 0;
  49
  50   if (!tearoff_menu_item_type)
  51     {
  52       static const GTypeInfo tearoff_menu_item_info =
  53       {
  54         sizeof (GtkTearoffMenuItemClass),
  55         NULL,           /* base_init */
  56         NULL,           /* base_finalize */
  57         (GClassInitFunc) gtk_tearoff_menu_item_class_init,
  58         NULL,           /* class_finalize */
  59         NULL,           /* class_data */
  60         sizeof (GtkTearoffMenuItem),
  61         0,              /* n_preallocs */
  62         (GInstanceInitFunc) gtk_tearoff_menu_item_init,
  63       };
  64
  65       tearoff_menu_item_type =
  66         g_type_register_static (GTK_TYPE_MENU_ITEM, "GtkTearoffMenuItem",
  67                                 &tearoff_menu_item_info, 0);
  68     }
  69
  70   return tearoff_menu_item_type;
  71 }
  72
  73 GtkWidget*
  74 gtk_tearoff_menu_item_new (void)
  75 {
  76   return g_object_new (GTK_TYPE_TEAROFF_MENU_ITEM, NULL);
  77 }
  78
  79 static void
  80 gtk_tearoff_menu_item_class_init (GtkTearoffMenuItemClass *klass)
  81 {
  82   GtkObjectClass *object_class;
  83   GtkWidgetClass *widget_class;
  84   GtkMenuItemClass *menu_item_class;
  85
  86   object_class = (GtkObjectClass*) klass;
  87   widget_class = (GtkWidgetClass*) klass;
  88   menu_item_class = (GtkMenuItemClass*) klass;
  89
  90   widget_class->expose_event = gtk_tearoff_menu_item_expose;
  91   widget_class->size_request = gtk_tearoff_menu_item_size_request;
  92   widget_class->parent_set = gtk_tearoff_menu_item_parent_set;
  93
  94   menu_item_class->activate = gtk_tearoff_menu_item_activate;
  95 }
  96
  97 static void
  98 gtk_tearoff_menu_item_init (GtkTearoffMenuItem *tearoff_menu_item)
  99 {
 100   tearoff_menu_item->torn_off = FALSE;
 101 }
 102
 103 static void
 104 gtk_tearoff_menu_item_size_request (GtkWidget      *widget,
 105                                     GtkRequisition *requisition)
 106 {
 107   GtkTearoffMenuItem *tearoff;
 108
 109   tearoff = GTK_TEAROFF_MENU_ITEM (widget);
 110
 111   requisition->width = (GTK_CONTAINER (widget)->border_width +
 112                         widget->style->xthickness +
 113                         BORDER_SPACING) * 2;
 114   requisition->height = (GTK_CONTAINER (widget)->border_width +
 115                          widget->style->ythickness) * 2;
 116
 117   if (GTK_IS_MENU (widget->parent) && GTK_MENU (widget->parent)->torn_off)
 118     {
 119       requisition->height += ARROW_SIZE;
 120     }
 121   else
 122     {
 123       requisition->height += widget->style->ythickness + 4;
 124     }
 125 }
 126
 127 static void
 128 gtk_tearoff_menu_item_paint (GtkWidget   *widget,
 129                              GdkRectangle *area)
 130 {
 131   GtkMenuItem *menu_item;
 132   GtkTearoffMenuItem *tearoff_item;
 133   GtkShadowType shadow_type;
 134   gint width, height;
 135   gint x, y;
 136   gint right_max;
 137   GtkArrowType arrow_type;
 138   GtkTextDirection direction;
 139
 140   if (GTK_WIDGET_DRAWABLE (widget))
 141     {
 142       menu_item = GTK_MENU_ITEM (widget);
 143       tearoff_item = GTK_TEAROFF_MENU_ITEM (widget);
 144
 145       direction = gtk_widget_get_direction (widget);
 146
 147       x = widget->allocation.x + GTK_CONTAINER (menu_item)->border_width;
 148       y = widget->allocation.y + GTK_CONTAINER (menu_item)->border_width;
 149       width = widget->allocation.width - GTK_CONTAINER (menu_item)->border_width * 2;
 150       height = widget->allocation.height - GTK_CONTAINER (menu_item)->border_width * 2;
 151       right_max = x + width;
 152
 153       if (widget->state == GTK_STATE_PRELIGHT)
 154         {
 155           gint selected_shadow_type;
 156
 157           gtk_widget_style_get (widget,
 158                                 "selected_shadow_type", &selected_shadow_type,
 159                                 NULL);
 160           gtk_paint_box (widget->style,
 161                          widget->window,
 162                          GTK_STATE_PRELIGHT,
 163                          selected_shadow_type,
 164                          area, widget, "menuitem",
 165                          x, y, width, height);
 166         }
 167       else
 168         gdk_window_clear_area (widget->window, area->x, area->y, area->width, area->height);
 169
 170       if (GTK_IS_MENU (widget->parent) && GTK_MENU (widget->parent)->torn_off)
 171         {
 172           gint arrow_x;
 173
 174           if (widget->state == GTK_STATE_PRELIGHT)
 175             shadow_type = GTK_SHADOW_IN;
 176           else
 177             shadow_type = GTK_SHADOW_OUT;
 178
 179           if (menu_item->toggle_size > ARROW_SIZE)
 180             {
 181               if (direction == GTK_TEXT_DIR_LTR) {
 182                 arrow_x = x + (menu_item->toggle_size - ARROW_SIZE)/2;
 183                 arrow_type = GTK_ARROW_LEFT;
 184               }
 185               else {
 186                 arrow_x = x + width - menu_item->toggle_size + (menu_item->toggle_size - ARROW_SIZE)/2;
 187                 arrow_type = GTK_ARROW_RIGHT;
 188               }
 189               x += menu_item->toggle_size + BORDER_SPACING;
 190             }
 191           else
 192             {
 193               if (direction == GTK_TEXT_DIR_LTR) {
 194                 arrow_x = ARROW_SIZE / 2;
 195                 arrow_type = GTK_ARROW_LEFT;
 196               }
 197               else {
 198                 arrow_x = x + width - 2 * ARROW_SIZE + ARROW_SIZE / 2;
 199                 arrow_type = GTK_ARROW_RIGHT;
 200               }
 201               x += 2 * ARROW_SIZE;
 202             }
 203
 204
 205           gtk_paint_arrow (widget->style, widget->window,
 206                            widget->state, shadow_type,
 207                            NULL, widget, "tearoffmenuitem",
 208                            arrow_type, FALSE,
 209                            arrow_x, y + height / 2 - 5,
 210                            ARROW_SIZE, ARROW_SIZE);
 211         }
 212
 213       while (x < right_max)
 214         {
 215           gint x1, x2;
 216
 217           if (direction == GTK_TEXT_DIR_LTR) {
 218             x1 = x;
 219             x2 = MIN (x + TEAR_LENGTH, right_max);
 220           }
 221           else {
 222             x1 = right_max - x;
 223             x2 = MAX (right_max - x - TEAR_LENGTH, 0);
 224           }
 225
 226           gtk_paint_hline (widget->style, widget->window, GTK_STATE_NORMAL,
 227                            NULL, widget, "tearoffmenuitem",
 228                            x1, x2, y + (height - widget->style->ythickness) / 2);
 229           x += 2 * TEAR_LENGTH;
 230         }
 231     }
 232 }
 233
 234 static gint
 235 gtk_tearoff_menu_item_expose (GtkWidget      *widget,
 236                             GdkEventExpose *event)
 237 {
 238   gtk_tearoff_menu_item_paint (widget, &event->area);
 239
 240   return FALSE;
 241 }
 242
 243 static void
 244 gtk_tearoff_menu_item_activate (GtkMenuItem *menu_item)
 245 {
 246   if (GTK_IS_MENU (GTK_WIDGET (menu_item)->parent))
 247     {
 248       GtkMenu *menu = GTK_MENU (GTK_WIDGET (menu_item)->parent);
 249
 250       gtk_menu_set_tearoff_state (GTK_MENU (GTK_WIDGET (menu_item)->parent),
 251                                   !menu->torn_off);
 252     }
 253
 254   gtk_widget_queue_resize (GTK_WIDGET (menu_item));
 255 }
 256
 257 static void
 258 tearoff_state_changed (GtkMenu            *menu,
 259                        GtkTearoffMenuItem *tearoff_menu_item)
 260 {
 261   tearoff_menu_item->torn_off = gtk_menu_get_tearoff_state (menu);
 262 }
 263
 264 static void
 265 gtk_tearoff_menu_item_parent_set (GtkWidget *widget,
 266                                   GtkWidget *previous)
 267 {
 268   GtkTearoffMenuItem *tearoff_menu_item = GTK_TEAROFF_MENU_ITEM (widget);
 269   GtkMenu *menu = GTK_IS_MENU (widget->parent) ? GTK_MENU (widget->parent) : NULL;
 270
 271   if (previous)
 272     g_signal_handlers_disconnect_by_func (previous,
 273                                           tearoff_state_changed,
 274                                           tearoff_menu_item);
 275
 276   if (menu)
 277     {
 278       tearoff_menu_item->torn_off = gtk_menu_get_tearoff_state (menu);
 279       g_signal_connect (menu, "notify::tearoff-state",
 280                         G_CALLBACK (tearoff_state_changed),
 281                         tearoff_menu_item);
 282     }
 283 }