PopupListener.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 06.12.2007
 */
package com.inet.jortho;

import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

import javax.swing.JPopupMenu;

/**
 * Implement a MouseListener for Popup Event. It simple show the popup if there are the right mouse event. This should
 * be part of the standard Java API.
 * 
 * @author Volker Berlin
 */
public class PopupListener extends MouseAdapter {
	private final JPopupMenu menu;

	public PopupListener(final JPopupMenu menu) {
		this.menu = menu;
	}

	private void maybeShowPopup(final MouseEvent ev) {
		if (ev.isPopupTrigger()) {
			menu.show(ev.getComponent(), ev.getX(), ev.getY());
		}
	}

	@Override
	public void mousePressed(final MouseEvent ev) {
		maybeShowPopup(ev);
	}

	@Override
	public void mouseReleased(final MouseEvent ev) {
		maybeShowPopup(ev);
	}
}