src/java.desktop/share/classes/java/awt/event/WindowStateListener.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
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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} 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}'s
 * {@code addWindowStateListener} method.  When the window's
 * state changes by virtue of being iconified, maximized etc., the
 * {@code windowStateChanged} method in the listener object is
 * invoked, and the {@code WindowEvent} 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.
     * @param e the event to be processed
     */
    public void windowStateChanged(WindowEvent e);
}