/*
 * Copyright 1999 Sun Microsystems, Inc.  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.  Sun designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.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);
}