/*

 * Copyright (c) 1996, 2013, 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;

/**

 * An abstract adapter class for receiving window events.

 * The methods in this class are empty. This class exists as

 * convenience for creating listener objects.

 * <P>

 * Extend this class to create a <code>WindowEvent</code> listener

 * and override the methods for the events of interest. (If you implement the

 * <code>WindowListener</code> interface, you have to define all of

 * the methods in it. This abstract class defines null methods for them

 * all, so you can only have to define methods for events you care about.)

 * <P>

 * Create a listener object using the extended class and then register it with

 * a Window using the window's <code>addWindowListener</code>

 * method. When the window's status changes by virtue of being opened,

 * closed, activated or deactivated, iconified or deiconified,

 * the relevant method in the listener

 * object is invoked, and the <code>WindowEvent</code> is passed to it.

 *

 * @see WindowEvent

 * @see WindowListener

 * @see <a href="https://docs.oracle.com/javase/tutorial/uiswing/events/windowlistener.html">Tutorial: Writing a Window Listener</a>

 *

 * @author Carl Quinn

 * @author Amy Fowler

 * @author David Mendenhall

 * @since 1.1

 */

public abstract class WindowAdapter

    implements WindowListener, WindowStateListener, WindowFocusListener

{

    /**

     * Invoked when a window has been opened.

     */

    public void windowOpened(WindowEvent e) {}

    /**

     * Invoked when a window is in the process of being closed.

     * The close operation can be overridden at this point.

     */

    public void windowClosing(WindowEvent e) {}

    /**

     * Invoked when a window has been closed.

     */

    public void windowClosed(WindowEvent e) {}

    /**

     * Invoked when a window is iconified.

     */

    public void windowIconified(WindowEvent e) {}

    /**

     * Invoked when a window is de-iconified.

     */

    public void windowDeiconified(WindowEvent e) {}

    /**

     * Invoked when a window is activated.

     */

    public void windowActivated(WindowEvent e) {}

    /**

     * Invoked when a window is de-activated.

     */

    public void windowDeactivated(WindowEvent e) {}

    /**

     * Invoked when a window state is changed.

     * @since 1.4

     */

    public void windowStateChanged(WindowEvent e) {}

    /**

     * Invoked when the Window is set to be the focused Window, which means

     * that the Window, or one of its subcomponents, will receive keyboard

     * events.

     *

     * @since 1.4

     */

    public void windowGainedFocus(WindowEvent e) {}

    /**

     * Invoked when the Window is no longer the focused Window, which means

     * that keyboard events will no longer be delivered to the Window or any of

     * its subcomponents.

     *

     * @since 1.4

     */

    public void windowLostFocus(WindowEvent e) {}

}