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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  }