/*
 * @(#)HierarchyBoundsListener.java	1.7 03/12/19
 *
 * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */

package java.awt.event;

import java.util.EventListener;

/**
 * The listener interface for receiving ancestor moved and resized events.
 * The class that is interested in processing these events either implements
 * this interface (and all the methods it contains) or extends the abstract
 * <code>HierarchyBoundsAdapter</code> class (overriding only the method of
 * interest).
 * The listener object created from that class is then registered with a
 * Component using the Component's <code>addHierarchyBoundsListener</code> 
 * method. When the hierarchy to which the Component belongs changes by
 * the resizing or movement of an ancestor, the relevant method in the listener
 * object is invoked, and the <code>HierarchyEvent</code> is passed to it.
 * <p>
 * Hierarchy events are provided for notification purposes ONLY;
 * The AWT will automatically handle changes to the hierarchy internally so
 * that GUI layout works properly regardless of whether a
 * program registers an <code>HierarchyBoundsListener</code> or not.
 *
 * @author	David Mendenhall
 * @version	1.7, 12/19/03
 * @see		HierarchyBoundsAdapter
 * @see		HierarchyEvent
 * @since 	1.3
 */
public interface HierarchyBoundsListener extends EventListener {
    /**
     * Called when an ancestor of the source is moved.
     */
    public void ancestorMoved(HierarchyEvent e);

    /**
     * Called when an ancestor of the source is resized.
     */
    public void ancestorResized(HierarchyEvent e);
}
