CheckerMenu.java example

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/*
 *  JOrtho
 *
 *  Copyright (C) 2005-2008 by i-net software
 *
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU General Public License as 
 *  published by the Free Software Foundation; either version 2 of the
 *  License, or (at your option) any later version. 
 *
 *  This program 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 for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 *  USA.
 *  
 *  Created on 07.11.2005
 */
package com.inet.jortho;

import java.awt.event.HierarchyEvent;
import java.awt.event.HierarchyListener;

import javax.swing.JMenu;
import javax.swing.JPopupMenu;

/**
 * @author Volker Berlin
 */
class CheckerMenu extends JMenu implements HierarchyListener {
	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;
	private final CheckerListener listener;

	CheckerMenu(final SpellCheckerOptions options) {
		super(Utils.getResource("spelling"));
		listener = new CheckerListener(this, options);
		super.addHierarchyListener(this);
	}

	public void hierarchyChanged(final HierarchyEvent ev) {
		// If this sub menu is added to a parent
		// then an Listener is added to request show popup events of the parent
		if (ev.getChangeFlags() == HierarchyEvent.PARENT_CHANGED && ev.getChanged() == this) {
			final JPopupMenu parent = (JPopupMenu) getParent();
			if (parent != null) {
				parent.addPopupMenuListener(listener);
			}
			else {
				((JPopupMenu) ev.getChangedParent()).removePopupMenuListener(listener);
			}
		}
	}
}