Blame gtk/gtktearoffmenuitem.c

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/* GTK - The GIMP Toolkit
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 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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 *
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 * This library is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2 of the License, or (at your option) any later version.
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 *
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 * This library is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with this library; if not, write to the
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 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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 * Boston, MA 02111-1307, USA.
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 */
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/*
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 * Modified by the GTK+ Team and others 1997-2000.  See the AUTHORS
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 * file for a list of people on the GTK+ Team.  See the ChangeLog
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 * files for a list of changes.  These files are distributed with
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 * GTK+ at ftp://ftp.gtk.org/pub/gtk/. 
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 */
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#include "config.h"
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#include "gtkmenu.h"
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#include "gtktearoffmenuitem.h"
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#include "gtkintl.h"
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#include "gtkalias.h"
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#define ARROW_SIZE 10
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#define TEAR_LENGTH 5
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#define BORDER_SPACING  3
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static void gtk_tearoff_menu_item_size_request (GtkWidget             *widget,
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				                GtkRequisition        *requisition);
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static gint gtk_tearoff_menu_item_expose     (GtkWidget             *widget,
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					      GdkEventExpose        *event);
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static void gtk_tearoff_menu_item_activate   (GtkMenuItem           *menu_item);
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static void gtk_tearoff_menu_item_parent_set (GtkWidget             *widget,
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					      GtkWidget             *previous);
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G_DEFINE_TYPE (GtkTearoffMenuItem, gtk_tearoff_menu_item, GTK_TYPE_MENU_ITEM)
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GtkWidget*
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gtk_tearoff_menu_item_new (void)
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{
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  return g_object_new (GTK_TYPE_TEAROFF_MENU_ITEM, NULL);
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}
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static void
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gtk_tearoff_menu_item_class_init (GtkTearoffMenuItemClass *klass)
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{
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  GtkWidgetClass *widget_class;
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  GtkMenuItemClass *menu_item_class;
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  widget_class = (GtkWidgetClass*) klass;
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  menu_item_class = (GtkMenuItemClass*) klass;
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  widget_class->expose_event = gtk_tearoff_menu_item_expose;
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  widget_class->size_request = gtk_tearoff_menu_item_size_request;
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  widget_class->parent_set = gtk_tearoff_menu_item_parent_set;
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  menu_item_class->activate = gtk_tearoff_menu_item_activate;
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}
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static void
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gtk_tearoff_menu_item_init (GtkTearoffMenuItem *tearoff_menu_item)
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{
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  tearoff_menu_item->torn_off = FALSE;
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}
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static void
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gtk_tearoff_menu_item_size_request (GtkWidget      *widget,
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				    GtkRequisition *requisition)
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{
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  requisition->width = (GTK_CONTAINER (widget)->border_width +
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			widget->style->xthickness +
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			BORDER_SPACING) * 2;
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  requisition->height = (GTK_CONTAINER (widget)->border_width +
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			 widget->style->ythickness) * 2;
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  if (GTK_IS_MENU (widget->parent) && GTK_MENU (widget->parent)->torn_off)
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    {
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      requisition->height += ARROW_SIZE;
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    }
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  else
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    {
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      requisition->height += widget->style->ythickness + 4;
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    }
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}
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static void
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gtk_tearoff_menu_item_paint (GtkWidget   *widget,
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			     GdkRectangle *area)
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{
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  GtkMenuItem *menu_item;
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  GtkShadowType shadow_type;
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  gint width, height;
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  gint x, y;
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  gint right_max;
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  GtkArrowType arrow_type;
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  GtkTextDirection direction;
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  if (gtk_widget_is_drawable (widget))
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    {
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      menu_item = GTK_MENU_ITEM (widget);
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      direction = gtk_widget_get_direction (widget);
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      x = widget->allocation.x + GTK_CONTAINER (menu_item)->border_width;
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      y = widget->allocation.y + GTK_CONTAINER (menu_item)->border_width;
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      width = widget->allocation.width - GTK_CONTAINER (menu_item)->border_width * 2;
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      height = widget->allocation.height - GTK_CONTAINER (menu_item)->border_width * 2;
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      right_max = x + width;
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      if (widget->state == GTK_STATE_PRELIGHT)
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	{
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	  gint selected_shadow_type;
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	  gtk_widget_style_get (widget,
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				"selected-shadow-type", &selected_shadow_type,
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				NULL);
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	  gtk_paint_box (widget->style,
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			 widget->window,
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			 GTK_STATE_PRELIGHT,
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			 selected_shadow_type,
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			 area, widget, "menuitem",
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			 x, y, width, height);
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	}
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      else
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	gdk_window_clear_area (widget->window, area->x, area->y, area->width, area->height);
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      if (GTK_IS_MENU (widget->parent) && GTK_MENU (widget->parent)->torn_off)
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	{
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	  gint arrow_x;
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	  if (widget->state == GTK_STATE_PRELIGHT)
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	    shadow_type = GTK_SHADOW_IN;
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	  else
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	    shadow_type = GTK_SHADOW_OUT;
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	  if (menu_item->toggle_size > ARROW_SIZE)
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	    {
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	      if (direction == GTK_TEXT_DIR_LTR) {
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		arrow_x = x + (menu_item->toggle_size - ARROW_SIZE)/2;
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		arrow_type = GTK_ARROW_LEFT;
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	      }
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	      else {
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		arrow_x = x + width - menu_item->toggle_size + (menu_item->toggle_size - ARROW_SIZE)/2; 
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		arrow_type = GTK_ARROW_RIGHT;	    
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	      }
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	      x += menu_item->toggle_size + BORDER_SPACING;
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	    }
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	  else
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	    {
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	      if (direction == GTK_TEXT_DIR_LTR) {
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		arrow_x = ARROW_SIZE / 2;
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		arrow_type = GTK_ARROW_LEFT;
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	      }
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	      else {
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		arrow_x = x + width - 2 * ARROW_SIZE + ARROW_SIZE / 2; 
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		arrow_type = GTK_ARROW_RIGHT;	    
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	      }
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	      x += 2 * ARROW_SIZE;
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	    }
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	  gtk_paint_arrow (widget->style, widget->window,
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			   widget->state, shadow_type,
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			   NULL, widget, "tearoffmenuitem",
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			   arrow_type, FALSE,
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			   arrow_x, y + height / 2 - 5, 
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			   ARROW_SIZE, ARROW_SIZE);
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	}
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      while (x < right_max)
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	{
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	  gint x1, x2;
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	  if (direction == GTK_TEXT_DIR_LTR) {
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	    x1 = x;
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	    x2 = MIN (x + TEAR_LENGTH, right_max);
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	  }
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	  else {
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	    x1 = right_max - x;
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	    x2 = MAX (right_max - x - TEAR_LENGTH, 0);
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	  }
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	  gtk_paint_hline (widget->style, widget->window, GTK_STATE_NORMAL,
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			   NULL, widget, "tearoffmenuitem",
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			   x1, x2, y + (height - widget->style->ythickness) / 2);
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	  x += 2 * TEAR_LENGTH;
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	}
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    }
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}
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static gint
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gtk_tearoff_menu_item_expose (GtkWidget      *widget,
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			    GdkEventExpose *event)
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{
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  gtk_tearoff_menu_item_paint (widget, &event->area);
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  return FALSE;
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}
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static void
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gtk_tearoff_menu_item_activate (GtkMenuItem *menu_item)
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{
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  if (GTK_IS_MENU (GTK_WIDGET (menu_item)->parent))
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    {
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      GtkMenu *menu = GTK_MENU (GTK_WIDGET (menu_item)->parent);
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      gtk_widget_queue_resize (GTK_WIDGET (menu_item));
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      gtk_menu_set_tearoff_state (GTK_MENU (GTK_WIDGET (menu_item)->parent),
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				  !menu->torn_off);
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    }
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}
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static void
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tearoff_state_changed (GtkMenu            *menu,
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		       GParamSpec         *pspec,
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		       gpointer            data)
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{
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  GtkTearoffMenuItem *tearoff_menu_item = GTK_TEAROFF_MENU_ITEM (data);
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  tearoff_menu_item->torn_off = gtk_menu_get_tearoff_state (menu);
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}
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static void
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gtk_tearoff_menu_item_parent_set (GtkWidget *widget,
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				  GtkWidget *previous)
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{
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  GtkTearoffMenuItem *tearoff_menu_item = GTK_TEAROFF_MENU_ITEM (widget);
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  GtkMenu *menu = GTK_IS_MENU (widget->parent) ? GTK_MENU (widget->parent) : NULL;
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  if (previous)
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    g_signal_handlers_disconnect_by_func (previous, 
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					  tearoff_state_changed, 
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					  tearoff_menu_item);
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  if (menu)
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    {
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      tearoff_menu_item->torn_off = gtk_menu_get_tearoff_state (menu);
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      g_signal_connect (menu, "notify::tearoff-state", 
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			G_CALLBACK (tearoff_state_changed), 
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			tearoff_menu_item);
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    }  
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}
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#define __GTK_TEAROFF_MENU_ITEM_C__
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#include "gtkaliasdef.c"