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

public class PainterDemo extends JFrame{
	
	JToggleButton[] button=new JToggleButton[3];  //按鈕組
	PainterPanel painter=new PainterPanel(); //繪圖面板
	
	public PainterDemo(){
		super("Java畫圖程序"); //調用父類構造函數
		
		String[] buttonName={"直線","橢圓","矩形"}; //按鈕文字
		DrawShapeListener buttonListener=new DrawShapeListener(); //按鈕事件

		JToolBar toolBar=new JToolBar(); //實例化工具欄
		ButtonGroup buttonGroup=new ButtonGroup(); //實例化按鈕組
		for (int i=0;i<button.length;i++){
			button[i]=new JToggleButton(buttonName[i]); //實例化按鈕
			button[i].addActionListener(buttonListener); //增加按鈕事件處理
			buttonGroup.add(button[i]); //增加按鈕到按鈕組
			toolBar.add(button[i]);	 //增加按鈕到工具欄
		}

		Container container=getContentPane(); //得到窗口容器
		container.add(toolBar,BorderLayout.NORTH); //增加組件到容器上
		container.add(painter,BorderLayout.CENTER);			
		
		setSize(300,200);  //設置窗口尺寸
		setVisible(true);  //設置窗口為可視
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);  //關閉窗口時退出程序		
	}
	
	class DrawShapeListener implements ActionListener{  //按鈕事件處理
		public void actionPerformed(ActionEvent e){
			for (int i=0;i<button.length;i++){ 
				if (e.getSource()==button[i]){  //判斷來自于哪個按鈕
					painter.drawShape(i); //繪制圖形
				}				
			}			
		}
	}
			
	public static void main(String[] args){
		new PainterDemo();
	}
}