buttonbarpanel.java

主要是对串口驱动的的一些控制源码！！！ 在下载javacomm20-win32.zip后就可以使用。

package de.fhm.jkf.launch.cl;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JPanel;

/**
 * @author Theodor Willax
 *
 * <br><br><center><table border="1" width="80%"><hr>
 * <strong><a href="http://jkf.sourceforge.net">The JKF Project</a></strong>
 * <p>
 * Copyright (C) 2002 by Theodor Willax
 * <p>
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * <p>
 * This library 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
 * Lesser General Public License for more details.
 * <p>
 * You should have received a copy of the <a href="http://www.gnu.org/copyleft/lesser.html">
 * GNU Lesser General Public License</a> along with this library; if not, write to
 * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA  02111-1307  USA
 * <hr></table></center>
 *
 * Button panel for the launcher application.
 */
class ButtonBarPanel extends JPanel implements ActionListener {
	
	private JButton launchButton = new JButton("launch");
	private JButton cancelButton = new JButton("cancel");
	private JButton clearButton = new JButton("clear");
	
	/**
	 * Reference to the launchers main class.
	 */
	private Main main;
	
	/**
	 * Creates a <code>new</code> button panel. Disables
	 * the clear button if the cache is empty.
	 * 
	 * @param mainApp the main application.
	 */
	public ButtonBarPanel(Main mainApp) {
		main = mainApp;
		launchButton.addActionListener(this);
		cancelButton.addActionListener(this);
		clearButton.addActionListener(this);
		add(clearButton);
		add(cancelButton);
		add(launchButton);
		clearButton.setEnabled(!main.isCacheEmpty());
	}
	
	/**
	 * Takes actions according to the pressed button.
	 */
	public void actionPerformed(ActionEvent e) {
		Object source = e.getSource();
		if (source == launchButton) {
			// fire up the application
			main.launch();
		} else if (source == cancelButton) {
			System.exit(0);
		} else if (source == clearButton) {
			clearButton.setEnabled(!main.clearCache() );
		}
	}
}