1 /*
   2  * Copyright (c) 2000, 2007, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package java.awt;
  27 
  28 import sun.awt.AppContext;
  29 import sun.awt.SunToolkit;
  30 
  31 /**
  32  * A wrapping tag for a nested AWTEvent which indicates that the event was
  33  * sent from another AppContext. The destination AppContext should handle the
  34  * event even if it is currently blocked waiting for a SequencedEvent or
  35  * another SentEvent to be handled.
  36  *
  37  * @author David Mendenhall
  38  */
  39 class SentEvent extends AWTEvent implements ActiveEvent {
  40     /*
  41      * serialVersionUID
  42      */
  43     private static final long serialVersionUID = -383615247028828931L;
  44 
  45     static final int ID =
  46         java.awt.event.FocusEvent.FOCUS_LAST + 2;
  47 
  48     boolean dispatched;
  49     private AWTEvent nested;
  50     private AppContext toNotify;
  51 
  52     SentEvent() {
  53         this(null);
  54     }
  55     SentEvent(AWTEvent nested) {
  56         this(nested, null);
  57     }
  58     SentEvent(AWTEvent nested, AppContext toNotify) {
  59         super((nested != null)
  60                   ? nested.getSource()
  61                   : Toolkit.getDefaultToolkit(),
  62               ID);
  63         this.nested = nested;
  64         this.toNotify = toNotify;
  65     }
  66 
  67     public void dispatch() {
  68         try {
  69             if (nested != null) {
  70                 Toolkit.getEventQueue().dispatchEvent(nested);
  71             }
  72         } finally {
  73             dispatched = true;
  74             if (toNotify != null) {
  75                 SunToolkit.postEvent(toNotify, new SentEvent());
  76             }
  77             synchronized (this) {
  78                 notifyAll();
  79             }
  80         }
  81     }
  82     final void dispose() {
  83         dispatched = true;
  84         if (toNotify != null) {
  85             SunToolkit.postEvent(toNotify, new SentEvent());
  86         }
  87         synchronized (this) {
  88             notifyAll();
  89         }
  90     }
  91 }