/*
 * Copyright (c) 2001, 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
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 */

package java.awt.event;

import java.util.EventListener;

/**
 * The listener interface for receiving window state events.
 * <p>
 * The class that is interested in processing a window state event
 * either implements this interface (and all the methods it contains)
 * or extends the abstract <code>WindowAdapter</code> class
 * (overriding only the methods of interest).
 * <p>
 * The listener object created from that class is then registered with
 * a window using the <code>Window</code>'s
 * <code>addWindowStateListener</code> method.  When the window's
 * state changes by virtue of being iconified, maximized etc., the
 * <code>windowStateChanged</code> method in the listener object is
 * invoked, and the <code>WindowEvent</code> is passed to it.
 *
 * @see java.awt.event.WindowAdapter
 * @see java.awt.event.WindowEvent
 *
 * @since 1.4
 */
public interface WindowStateListener extends EventListener {
    /**
     * Invoked when window state is changed.
     */
    public void windowStateChanged(WindowEvent e);
}
