repaint?

[Guest_imported]

Does anyone know how to make a class (that extends Canvas) to keep repainting automatically (in order to display new values) whenever someone invoke that action from the main class.

I have part of the code here which doesnt really work:
------------------------------------------------------
public class Diagram extends Canvas
{ ....

public void paint(Graphics g)
{
new Diagram(n.getName());
display(g);
}
....
}

------------------------------------------------------

When i debug, it does retrieve the new values each time someone invoke that action but it doesnt repaint the canvas with the new values, the initial values are always stay visible.

Thank you.

 

[HavaTheJut]

(Sorry for any bugs in the following, but I can't test it at the moment.)
Try something like:
(??? is the class of n)

public class Diagram extends Canvas
{
 Thread paintThread;
 ??? nVal;

 ...

 public void paint(Graphics g)
 {
  // create  and start the painting thread
  // if it does not exist
  if (paintThread==null || !paintThread.isAlive())
  {

   // the painting thread
   paintThread = new Thread()
   {
    boolean doRun = true;
    public void run()
    {
     while(doRun)
     {
      paint(g);
      try { sleep(100); } catch(Exception eSleep) {}
     }
    }
    public void endPaint()
    {
     doRun = false;
    }
   };

   paintThread.start();

  }

  // otherwise paint the values if the
  // name is new

  else if (nVal==null ||
    !(nVal.getName()).equals(n.getName()))
  {
   new Diagram(n.getName());
   display(g);
  }

  // method to stop the painting
  public void stopPaint()
  {
   paintThread.endPaint();
  }
 ....
}

I hope this helps.
-HavaTheJut

 

[HavaTheJut]

Already found one

else if (nVal==null ||
    !(nVal.getName()).equals(n.getName()))
  {
   new Diagram(n.getName());
   display(g);

nVal = n;

  }