Java Applet painting outside it's borders?!

Question

Hello all, I have a java applet that is painting outside of it's bordors in Firefox and IE, only when scrolling does this occur. I have been searching around and found a bug which was submitted in 2006 for the same issue but cannot see any resolution or further issues. I imagine there must be a workaround as this would be quite a major issue if it was always the case. It only happens when scrolling and the applet is being repainted. Any ideas?
Thanks
Dori

Answer 1

here we go!
package main;
import javax.swing.JApplet;
public class Test extends JApplet
     private GamePanel gamePanel;
    public Test()
    public void init()
    public void start()
        //create a new GamePanel
         gamePanel = new GamePanel();
         //add the panel to the contentPane
         this.getContentPane().add(gamePanel);
    }//EOM
    public void stop()
         gamePanel.stopTimer();
    public void destroy()
        System.out.println("preparing for unloading...");
}and
package main;
import java.awt.Dimension;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.util.Timer;
import java.util.TimerTask;
import javax.swing.JPanel;
public class GamePanel extends JPanel{
     private static final int PWIDTH = 400;
     private static final int PHEIGHT = 400;
     private StringBuffer buffer;
     private int clickCounter = 0;
     private static final int FONTSIZE = 100;
     //timer period in ms
     private static final int PERIOD = 100;
     //game length (seconds)
     private static final int GAME_LENGTH = 5;
     //for the timer
     private long startTime;
     //image for Double buffering
     private Image dbImage = null;
     //timer
     Timer t = null;
     private boolean debug = true;
     private boolean gameRunning = false;
     public GamePanel(){
          setBackground(Color.gray);
          setSize( new Dimension(PWIDTH, PHEIGHT));
          setFocusable(true); //to receive key events
         requestFocus();
         addMouseListener( new MouseAdapter() {
            public void mousePressed(MouseEvent e)
            { doMouseAction(); }
         setUpNewGame();
     }//EOC
     public void setUpNewGame(){
         //set gameRunning to true, affects click actions
         gameRunning = true;
         //set counter to 0
         clickCounter = 0;
        MyTimerTask task = new MyTimerTask();
        t = new Timer();
        t.scheduleAtFixedRate(task,0,PERIOD);
        //for the timer
        startTime = System.currentTimeMillis();
    }//EOM
      private void doMouseAction(){
         if(gameRunning == true){
              incrementCounter();
         else if(gameRunning == false){
              setUpNewGame();
     }//EOM
      public void stopTimer(){
           t.cancel();
          System.out.println("Timer stopped!");
      public void timesUp(){
         //stop the timer
         stopTimer();
         //set game running to false
         gameRunning = false;
         //show gameover message
         //overwrite dbimage with score
        Graphics dbg = dbImage.getGraphics();
         //clear the image
         dbg.setColor(Color.gray);
         dbg.fillRect(0, 0, getWidth(), getHeight());
         //write the score
         dbg.setColor(Color.white);
         dbg.drawString("Your score was "+clickCounter+" clicks in "+GAME_LENGTH+" secs", 10, 40);
         //draw this to screen
         repaint();
     public void paintComponent(Graphics g)
        super.paintComponent(g);
         g.drawImage(dbImage, 0, 0, null);
    //draw to dbImage
    public void renderImage(){
         //for debug only
        long startRenderTime = System.nanoTime();
         //this will be removed, on init it should take the attributes from the html
         //and create the dbimage only once with these params
        //out(""+dbImage);
         dbImage = createImage(getWidth(), getHeight());
         out(dbImage+","+getWidth()+","+getHeight());
         Graphics dbg = dbImage.getGraphics();
         //this code should be here
         dbg.setColor(Color.gray);
         dbg.fillRect(0,0, getWidth(), getHeight());
         dbg.setColor(Color.white);
        dbg.setFont(new Font("ARIAL BOLD",Font.PLAIN,FONTSIZE));
        dbg.drawString(""+clickCounter,(getWidth()/2),(getHeight()/2));
        //draw timer
        dbg.setFont(new Font("ARIAL",Font.PLAIN,15));
        //calc time
        long currentTime = System.currentTimeMillis() - startTime;
        //for display in secs
        float floatTime = (float)((int)(currentTime/100f))/10f;
        dbg.drawString(""+floatTime, 10, getHeight()-10);
        //dbg.dispose();//test
        if(false){ //test for game over here
             //draw game over stuff here
        if(debug){
             //in ms
             long totalRenderTime = (System.nanoTime() - startRenderTime)/1000000L;
             System.out.println("Total Render Time = "+totalRenderTime+" ms, allowed "+PERIOD+"ms");
    }//EOM
    public void incrementCounter(){
         clickCounter++;
     private class MyTimerTask extends TimerTask{     
         public void run(){
              renderImage();
              repaint();
              if(System.currentTimeMillis()-startTime >= GAME_LENGTH*1000){
                   //stop the game
                   timesUp();
    }//End of inner class
      * Debugging method
      * @param out
     private void out(String out){
          System.out.println(out);
}//End of class