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     @SuppressWarnings("serial") // Not statically typed as Serializable
  51     private AppContext toNotify;
  52 
  53     SentEvent() {
  54         this(null);
  55     }
  56     SentEvent(AWTEvent nested) {
  57         this(nested, null);
  58     }
  59     SentEvent(AWTEvent nested, AppContext toNotify) {
  60         super((nested != null)
  61                   ? nested.getSource()
  62                   : Toolkit.getDefaultToolkit(),
  63               ID);
  64         this.nested = nested;
  65         this.toNotify = toNotify;
  66     }
  67 
  68     public void dispatch() {
  69         try {
  70             if (nested != null) {
  71                 Toolkit.getEventQueue().dispatchEvent(nested);
  72             }
  73         } finally {
  74             dispatched = true;
  75             if (toNotify != null) {
  76                 SunToolkit.postEvent(toNotify, new SentEvent());
  77             }
  78             synchronized (this) {
  79                 notifyAll();
  80             }
  81         }
  82     }
  83     final void dispose() {
  84         dispatched = true;
  85         if (toNotify != null) {
  86             SunToolkit.postEvent(toNotify, new SentEvent());
  87         }
  88         synchronized (this) {
  89             notifyAll();
  90         }
  91     }
  92 }