/*
 * Copyright (c) 1997, 2014, 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
 * or visit www.oracle.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/**
 * 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
Params:
event – an AncestorEvent signifying a change in an ancestor-component's display-status/**
     * 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
     *
     * @param event an {@code AncestorEvent} signifying a change in an
     *              ancestor-component's display-status
     */
    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
removed 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
Params:
event – an AncestorEvent signifying a change in an ancestor-component's display-status/**
     * Called when the source or one of its ancestors is made invisible
     * either by setVisible(false) being called or by its being
     * removed 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
     *
     * @param event an {@code AncestorEvent} signifying a change in an
     *              ancestor-component's display-status
     */
    public void ancestorRemoved(AncestorEvent event);

    
Called when either the source or one of its ancestors is moved.
Params:
event – an AncestorEvent signifying a change in an ancestor-component's display-status/**
     * Called when either the source or one of its ancestors is moved.
     *
     * @param event an {@code AncestorEvent} signifying a change in an
     *              ancestor-component's display-status
     */
    public void ancestorMoved(AncestorEvent event);

}