/*

 * Copyright (c) 1999, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package sun.awt;

import java.awt.event.WindowEvent;

/**

 * Interface for listening to WINDOW_CLOSING events before and

 * after they are posted to the queue.

 */

public interface WindowClosingListener {

    /**

     * Called before a WINDOW_CLOSING event gets posted to the queue.

     * @param event The WINDOW_CLOSING event that will be posted.

     * @return A RuntimeException if the result of this function

     * call needs to interrupt a blocking thread.  The exception

     * returned will be thrown from that thread.  This function

     * should return null otherwise.

     */

    RuntimeException windowClosingNotify(WindowEvent event);

    /**

     * Called after a WINDOW_CLOSING event gets posted to the queue.

     * @param event The WINDOW_CLOSING event that has been posted.

     * @return A RuntimeException if the result of this function

     * call needs to interrupt a blocking thread.  The exception

     * returned will be thrown from that thread.  This function

     * should return null otherwise.

     */

    RuntimeException windowClosingDelivered(WindowEvent event);

}