1 /*
   2  * Copyright (c) 1999, 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 sun.awt;
  27 
  28 import java.awt.event.WindowEvent;
  29 
  30 /**
  31  * Interface for listening to WINDOW_CLOSING events before and
  32  * after they are posted to the queue.
  33  */
  34 public interface WindowClosingListener {
  35     /**
  36      * Called before a WINDOW_CLOSING event gets posted to the queue.
  37      * @param event The WINDOW_CLOSING event that will be posted.
  38      * @return A RuntimeException if the result of this function
  39      * call needs to interrupt a blocking thread.  The exception
  40      * returned will be thrown from that thread.  This function
  41      * should return null otherwise.
  42      */
  43     RuntimeException windowClosingNotify(WindowEvent event);
  44     /**
  45      * Called after a WINDOW_CLOSING event gets posted to the queue.
  46      * @param event The WINDOW_CLOSING event that has been posted.
  47      * @return A RuntimeException if the result of this function
  48      * call needs to interrupt a blocking thread.  The exception
  49      * returned will be thrown from that thread.  This function
  50      * should return null otherwise.
  51      */
  52     RuntimeException windowClosingDelivered(WindowEvent event);
  53 }