Source for gnu.java.awt.ComponentReshapeEvent

   1: /* WindowResizeEvent.java -- Used to synchronize the AWT and peer sizes
   2:    Copyright (C) 2006 Free Software Foundation, Inc.
   3: 
   4: This file is part of GNU Classpath.
   5: 
   6: GNU Classpath is free software; you can redistribute it and/or modify
   7: it under the terms of the GNU General Public License as published by
   8: the Free Software Foundation; either version 2, or (at your option)
   9: any later version.
  10: 
  11: GNU Classpath is distributed in the hope that it will be useful, but
  12: WITHOUT ANY WARRANTY; without even the implied warranty of
  13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14: General Public License for more details.
  15: 
  16: You should have received a copy of the GNU General Public License
  17: along with GNU Classpath; see the file COPYING.  If not, write to the
  18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19: 02110-1301 USA.
  20: 
  21: Linking this library statically or dynamically with other modules is
  22: making a combined work based on this library.  Thus, the terms and
  23: conditions of the GNU General Public License cover the whole
  24: combination.
  25: 
  26: As a special exception, the copyright holders of this library give you
  27: permission to link this library with independent modules to produce an
  28: executable, regardless of the license terms of these independent
  29: modules, and to copy and distribute the resulting executable under
  30: terms of your choice, provided that you also meet, for each linked
  31: independent module, the terms and conditions of the license of that
  32: module.  An independent module is a module which is not derived from
  33: or based on this library.  If you modify this library, you may extend
  34: this exception to your version of the library, but you are not
  35: obligated to do so.  If you do not wish to do so, delete this
  36: exception statement from your version. */
  37: 
  38: 
  39: package gnu.java.awt;
  40: 
  41: import java.awt.AWTEvent;
  42: import java.awt.Component;
  43: 
  44: /**
  45:  * This is used to update the AWT's knowledge about a Window's size when
  46:  * the user changes the window bounds.
  47:  *
  48:  * This event is _not_ posted to the eventqueue, but rather dispatched directly
  49:  * via Window.dispatchEvent(). It is the cleanest way we could find to update
  50:  * the AWT's knowledge of the window size. Small testprograms showed the
  51:  * following:
  52:  * - Component.reshape() and its derivatives are _not_ called. This makes sense
  53:  *   as it could end up in loops,because this calls back into the peers.
  54:  * - Intercepting event dispatching for any events in
  55:  *   EventQueue.dispatchEvent() showed that the size is still updated. So it
  56:  *   is not done via an event dispatched over the eventqueue.
  57:  *
  58:  * Possible other candidates for implementation would have been:
  59:  * - Call a (private) callback method in Window/Component from the native
  60:  *   side.
  61:  * - Call a (private) callback method in Window/Component via reflection.
  62:  *
  63:  * Both is uglier than sending this event directly. Note however that this
  64:  * is impossible to test, as Component.dispatchEvent() is final and can't be
  65:  * intercepted from outside code. But this impossibility to test the issue from
  66:  * outside code also means that this shouldn't raise any compatibility issues.
  67:  */
  68: public class ComponentReshapeEvent
  69:   extends AWTEvent
  70: {
  71: 
  72:   public int x;
  73:   public int y;
  74:   public int width;
  75:   public int height;
  76: 
  77:   public ComponentReshapeEvent(Component c, int x, int y, int width, int height)
  78:   {
  79:     super(c, 1999);
  80:     this.x = x;
  81:     this.y = y;
  82:     this.width = width;
  83:     this.height = height;
  84:   }
  85: }