/*
 * @(#)AncestorNotifier.java	1.21 06/04/07
 *
 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */

package javax.swing;


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

import java.awt.Component;
import java.awt.Container;
import java.awt.Window;
import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeEvent;

import java.io.Serializable;


/**
 * @version 1.21 04/07/06
 * @author Dave Moore
 */

class AncestorNotifier implements ComponentListener, PropertyChangeListener, Serializable 
{
    Component firstInvisibleAncestor;
    EventListenerList listenerList = new EventListenerList();
    JComponent root;

    AncestorNotifier(JComponent root) {
	this.root = root;
       	addListeners(root, true);
    }

    void addAncestorListener(AncestorListener l) {
	listenerList.add(AncestorListener.class, l);
    }

    void removeAncestorListener(AncestorListener l) {
	listenerList.remove(AncestorListener.class, l);
    }

    AncestorListener[] getAncestorListeners() {
	return (AncestorListener[])listenerList.getListeners(AncestorListener.class);
    }

    /**
     * Notify all listeners that have registered interest for
     * notification on this event type.  The event instance 
     * is lazily created using the parameters passed into 
     * the fire method.
     * @see EventListenerList
     */
    protected void fireAncestorAdded(JComponent source, int id, Container ancestor, Container ancestorParent) {

	// Guaranteed to return a non-null array
	Object[] listeners = listenerList.getListenerList();
	// Process the listeners last to first, notifying
	// those that are interested in this event
	for (int i = listeners.length-2; i>=0; i-=2) {
	    if (listeners[i]==AncestorListener.class) {
		// Lazily create the event:
		AncestorEvent ancestorEvent = 
		    new AncestorEvent(source, id, ancestor, ancestorParent);
		((AncestorListener)listeners[i+1]).ancestorAdded(ancestorEvent);
	    }	       
	}
    }	
    
    /**
     * Notify all listeners that have registered interest for
     * notification on this event type.  The event instance 
     * is lazily created using the parameters passed into 
     * the fire method.
     * @see EventListenerList
     */
    protected void fireAncestorRemoved(JComponent source, int id, Container ancestor, Container ancestorParent) {

	// Guaranteed to return a non-null array
	Object[] listeners = listenerList.getListenerList();
	// Process the listeners last to first, notifying
	// those that are interested in this event
	for (int i = listeners.length-2; i>=0; i-=2) {
	    if (listeners[i]==AncestorListener.class) {
		// Lazily create the event:
		AncestorEvent ancestorEvent = 
		    new AncestorEvent(source, id, ancestor, ancestorParent);
		((AncestorListener)listeners[i+1]).ancestorRemoved(ancestorEvent);
	    }	       
	}
    }	
    /**
     * Notify all listeners that have registered interest for
     * notification on this event type.  The event instance 
     * is lazily created using the parameters passed into 
     * the fire method.
     * @see EventListenerList
     */