jradiobuttondemo.java

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/*
 * $Header$
 * $Date$ 
 * $Revision$
 * Copyright (C) 2003-2004 CIC, Tsinghua Univ. 
 */
package jcase.gui.swing;

import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Enumeration;
import java.util.Properties;

import javax.swing.ButtonGroup;
import javax.swing.JRadioButton;
import javax.swing.JTextField;

/**
 * JRadioButtonDemo 
 */
public class JRadioButtonDemo extends BaseSwingDemo implements ActionListener {
	JTextField jtf;
	Properties ships;
	ButtonGroup bg;
	protected void init() {
		bg = new ButtonGroup();
		ships=new Properties();
		ships.setProperty("尼布加尼撒号","（马克三型，编好十一）建于2069年");
		ships.setProperty("奥西瑞斯号","建于2079年");
		ships.setProperty("逻格斯号","建于2101年");
		ships.setProperty("雷神之锤号","（马克十四型，编号六十二）建于2111年");
		Enumeration keys=ships.keys();
		while(keys.hasMoreElements()){
			String key=keys.nextElement().toString();
			add(createShip(key));
		}
		jtf = new JTextField(30);
		add(jtf);
	}
	
	public String getTitle() {		
		return "JRadioButton演示";
	}
	
	private JRadioButton createShip(String text){
		JRadioButton ship = new JRadioButton(text);
	 	ship.addActionListener(this);
	 	bg.add(ship);
	 	return ship;
	}
	/**
	 *显示当前选择的radiobutton
	 */
	public void actionPerformed(ActionEvent e) {
		String ship =e.getActionCommand();		
		jtf.setText(ship+": "+ships.getProperty(ship));
	}
	
	/**
	 * 设置最佳显示尺寸
	 */
	public Dimension getPreferredSize() {		
		return new Dimension(400,100);
	}
}