/*

 * Copyright 1997-1998 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 javax.swing.event;

import java.awt.event.*;

import java.awt.*;

import java.util.*;

import javax.swing.*;

/**

 * AncestorListener

 *

 * Interface to support notification when changes occur to a JComponent or one

 * of its ancestors.  These include movement and when the component becomes

 * visible or invisible, either by the setVisible() method or by being added

 * or removed from the component hierarchy.

 *

 * @author Dave Moore

 */

public interface AncestorListener extends EventListener {

    /**

     * Called when the source or one of its ancestors is made visible

     * either by setVisible(true) being called or by its being

     * added to the component hierarchy.  The method is only called

     * if the source has actually become visible.  For this to be true

     * all its parents must be visible and it must be in a hierarchy

     * rooted at a Window

     */

    public void ancestorAdded(AncestorEvent event);

    /**

     * Called when the source or one of its ancestors is made invisible

     * either by setVisible(false) being called or by its being

     * remove from the component hierarchy.  The method is only called

     * if the source has actually become invisible.  For this to be true

     * at least one of its parents must by invisible or it is not in

     * a hierarchy rooted at a Window

     */

    public void ancestorRemoved(AncestorEvent event);

    /**

     * Called when either the source or one of its ancestors is moved.

     */

    public void ancestorMoved(AncestorEvent event);

}