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package javax.swing.event;

import java.awt.event.*;
import java.awt.*;
import javax.swing.*;

An event reported to a child component that originated from an
ancestor in the component hierarchy.

Warning:
Serialized objects of this class will not be compatible with
future Swing releases. The current serialization support is
appropriate for short term storage or RMI between applications running
the same version of Swing.  As of 1.4, support for long term storage
of all JavaBeansTM
has been added to the java.beans package. Please see XMLEncoder. 
Author:
Dave Moore/**
 * An event reported to a child component that originated from an
 * ancestor in the component hierarchy.
 * <p>
 * <strong>Warning:</strong>
 * Serialized objects of this class will not be compatible with
 * future Swing releases. The current serialization support is
 * appropriate for short term storage or RMI between applications running
 * the same version of Swing.  As of 1.4, support for long term storage
 * of all JavaBeans<sup><font size="-2">TM</font></sup>
 * has been added to the <code>java.beans</code> package.
 * Please see {@link java.beans.XMLEncoder}.
 *
 * @author Dave Moore
 */
public class AncestorEvent extends AWTEvent {
    
An ancestor-component was added to the hierarchy of
visible objects (made visible), and is currently being displayed.
/**
     * An ancestor-component was added to the hierarchy of
     * visible objects (made visible), and is currently being displayed.
     */
    public static final int ANCESTOR_ADDED = 1;
    
An ancestor-component was removed from the hierarchy
of visible objects (hidden) and is no longer being displayed.
/**
     * An ancestor-component was removed from the hierarchy
     * of visible objects (hidden) and is no longer being displayed.
     */
    public static final int ANCESTOR_REMOVED = 2;
    
An ancestor-component changed its position on the screen. /** An ancestor-component changed its position on the screen. */
    public static final int ANCESTOR_MOVED = 3;

    Container ancestor;
    Container ancestorParent;

    
Constructs an AncestorEvent object to identify a change
in an ancestor-component's display-status.
Params:
source –          the JComponent that originated the event
                       (typically this)
id –  an int specifying ANCESTOR_ADDED, ANCESTOR_REMOVED or ANCESTOR_MOVED
ancestor –        a Container object specifying the ancestor-component
                       whose display-status changed
ancestorParent –  a Container object specifying the ancestor's parent/**
     * Constructs an AncestorEvent object to identify a change
     * in an ancestor-component's display-status.
     *
     * @param source          the JComponent that originated the event
     *                        (typically <code>this</code>)
     * @param id              an int specifying {@link #ANCESTOR_ADDED},
     *                        {@link #ANCESTOR_REMOVED} or {@link #ANCESTOR_MOVED}
     * @param ancestor        a Container object specifying the ancestor-component
     *                        whose display-status changed
     * @param ancestorParent  a Container object specifying the ancestor's parent
     */
    public AncestorEvent(JComponent source, int id, Container ancestor, Container ancestorParent) {
        super(source, id);
        this.ancestor = ancestor;
        this.ancestorParent = ancestorParent;
    }

    
Returns the ancestor that the event actually occurred on.
/**
     * Returns the ancestor that the event actually occurred on.
     */
    public Container getAncestor() {
        return ancestor;
    }

    
Returns the parent of the ancestor the event actually occurred on.
This is most interesting in an ANCESTOR_REMOVED event, as
the ancestor may no longer be in the component hierarchy.
/**
     * Returns the parent of the ancestor the event actually occurred on.
     * This is most interesting in an ANCESTOR_REMOVED event, as
     * the ancestor may no longer be in the component hierarchy.
     */
    public Container getAncestorParent() {
        return ancestorParent;
    }

    
Returns the component that the listener was added to.
/**
     * Returns the component that the listener was added to.
     */
    public JComponent getComponent() {
        return (JComponent)getSource();
    }
}