Timer problem...

[Jim Crawford]

Hi
Why doesn't run get called?
Thanks.

 
import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;
import java.util.*;
public class Test1 extends MIDlet
{
  public void startApp()
  {
    Displayable d = new PacerCanvas();
    d.addCommand(new Command("Exit", Command.EXIT, 0));
    d.setCommandListener(new CommandListener()
                         {
                           public void commandAction(Command c, Displayable s)
                           {
                             notifyDestroyed();
                           }
                         }
                        );

    Display.getDisplay(this).setCurrent(d);
  }
  public void pauseApp()
  {}
  public void destroyApp(boolean unconditional)
  {}
}

class PacerCanvas extends Canvas
{
  UpdateDisplay task = new UpdateDisplay(Image.createImage(getWidth(), getHeight()), this, getWidth(), getHeight());
  
  public PacerCanvas()
  {
    new Timer().scheduleAtFixedRate(task, new Date().getTime() + 5, 5);
  }
  public void paint(Graphics g)
  {
    g.drawImage(((UpdateDisplay)task).getImage(), 1, 1, Graphics.TOP|Graphics.LEFT);
  }
}
class UpdateDisplay extends TimerTask
{
  PacerCanvas pacerCanvas;
  Image image;
  private static int colour = 0;
  private static int x = 10;
  private static int y = 10;
  private int width;
  private int height;

  public UpdateDisplay(Image image, PacerCanvas pacerCanvas, int width, int height)
  {
    System.out.println("UpdateDisplay constructor called.");
    this.image = image;
    this.pacerCanvas = pacerCanvas;
    this.width = width;
    this.height = height;
  }
  public Image getImage()
  {
    System.out.println("UpdateDisplay getImage called.");
    return image;
  }
  
  public void run()
  {
    System.out.println("UpdateDisplay run called.");
    
    Graphics graphics = image.getGraphics();
    
    graphics.setColor(0xffffff);
    graphics.fillRect(0, 0, width, height);

    graphics.setColor(colour);
    colour += 100;
    if (x < width-1)
      x += 1;
    if (y < height-1)
      y += 1;
    graphics.drawLine(x-1, y-1, x+1, y+1);
/*
    try
    {
      Thread.currentThread().sleep(50);
    }
    catch(Exception e)
    {
      e.printStackTrace();
    }
*/    
    pacerCanvas.repaint();
  }
}
 

[ February 07, 2004: Message edited by: Jim Crawford ]