Pileus Git - ~andy/gtk/blob - gtk/gtktearoffmenuitem.c

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