// 程序：使用過高的FPS
// 范例文件：DropFrame.java

import java.awt.*;
import java.applet.*;

public class DropFrame extends Applet implements Runnable
{
   int          SPF;           
   int          currentImage;  
   Image        Animation[];   
   MediaTracker MT;             

   Thread       newThread;      

   Image    OffScreen;         
   Graphics drawOffScreen;    

   public void init()
   {
      SPF          = 11;      

      currentImage = 0;             
      Animation    = new Image[8];  
      MT           = new MediaTracker(this);
  
      for(int i=0;i<8;i++)        
      {
         Animation[i] 
         = getImage(getDocumentBase(),"Images/Freedom" + (i+1) + ".gif");

         MT.addImage(Animation[i],0);
      }
 
      try 
      {
         showStatus("圖像載入中...");  
         MT.waitForAll();            
      }
      catch(InterruptedException E){ }

      OffScreen     = createImage(250,250);     
      drawOffScreen = OffScreen.getGraphics();   
   }

   public void start()  
   {

      newThread = new Thread(this);
      newThread.start();
   }

   public void stop() 
   {
      newThread = null; 
   }

   //==================================================================

   public void paint(Graphics g)  
   {

      drawOffScreen.setColor(Color.black);
      drawOffScreen.fillRect(0,0,250,250);


      drawOffScreen.drawImage(Animation[currentImage],0,0,250,250,this);


      g.drawImage(OffScreen,0,0,250,250,this); 
   }

   public void update(Graphics g)
   {
      paint(g);
   }

   public void run()
   {
      while(newThread != null)
      {
         repaint();                        

         try
         {
            Thread.sleep(SPF);            
         }
         catch(InterruptedException E){ }
              
         currentImage = (++currentImage) % 8; 
      }
   }
}