import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class AnimatorDemo extends JDialog  
{
	private AnimatorPanel animatorPanel;   //繪制動畫的面板
	//private JButton startButton, stopButton;
	//private JPanel buttonPanel;      //存放開始按鈕和結束按鈕的面板
	
	public AnimatorDemo()
	{
		//super("給點獎勵吧!!!!!!!!!!");
		super(new Frame(), "給點獎勵吧!!!!!!!!!!", false);
	    // setSize(400, 400);
	      this.setBounds(180,150,400,400);
	    //獲取內容面板
	    Container container = getContentPane();
	    
	    //創建用于繪制圖像的面板
	    animatorPanel = new AnimatorPanel();
	    container.add(animatorPanel, BorderLayout.CENTER);
	    
	    //設置字體
	    Font font = new Font("Serif", Font.PLAIN, 14);
	  
	    //container.add(buttonPanel, BorderLayout.SOUTH);
	   
	  
	    
	    setVisible(false);
	   // setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
	//處理按鈕事件
/*	public void actionPerformed(ActionEvent event)
	{
		//if(event.getSource() == startButton)
			animatorPanel.start();
	//	else if(event.getSource() == stopButton)
		//	animatorPanel.stop();
	}*/
	
/*	public static void main(String[] args) 
	{
		AnimatorDemo application = new AnimatorDemo();
	}*/

    class AnimatorPanel extends JPanel implements ActionListener
    {
    	private ImageIcon images[];
    	private int currentImage = 0;     //當前幀
    	private Timer timer;              //定時器
    	private int x = -100, y;                 //圖像的坐標
    	
        public AnimatorPanel() 
        {
        	super();
        	setBackground(Color.WHITE);
        	images = new ImageIcon[4];    //創建圖像對象數組
        	for(int i = 0; i < images.length; i++)
        	{        //載入圖像
        		images[i] = new ImageIcon("boy0" + (i+1) + ".png");
        	}
        	//this.setVisible(false);
        }
        
        public void paintComponent(Graphics g) 
        {
            Graphics2D g2d=(Graphics2D)g;
            g2d.setColor(getBackground());
            g2d.fillRect(0, 0, getWidth(), getHeight());
            //繪制圖像,坐標為屏幕中心 
            y = (this.getHeight() - images[currentImage].getIconHeight())/2;
            images[currentImage].paintIcon(this, g, x, y);
            //定時器正在運行
            currentImage = (++currentImage)%4; 
             animatorPanel.start();
        }
        //開始動畫
        public void start()
        {
        	if(timer == null)
        	{
        		currentImage = 0;
        		timer = new Timer(100, this);      //創建定時器
        		timer.start();
        	} 
        	else if(!timer.isRunning())
        	   timer.restart();
        		//timer.stop();
        	//startButton.setEnabled(false);
        //	stopButton.setEnabled(true);
        }
        //動畫暫停
       public void stop()
        {
        	timer.stop();
        	//startButton.setEnabled(true);
        	//stopButton.setEnabled(false);
        }
        
        //處理定時器事件
        public void actionPerformed(ActionEvent event)
        {
        	x += 10;
        	if(x >= 450)
        		x=-100;
        	repaint();
        }
    }
}