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