drawstring on canvas

[Dennis Riggs]

I have seven buttons. Each button draws a different string. In my actionlistener method, I first call repaint to clear the canvas, then I draw the string. Unfortunatly, after clearing the canvas, the new text is drawn, then repainted again. Any solutions?
thanks,
dennis

[Cindy Glass]

Some code would help.

[Dennis Riggs]

Thanks Cindy,
Here is the paint method:

public void paint(Graphics g)
  {
c.repaint();
c.setForeground(Color.black);
requestFocus();
System.out.println("I'm at paint");
}
//Here is the troubling listener:
 if(event.getSource()==btn2)
              {
 repaint();
  String text="this is a test";
  c.setForeground(Color.black);
  c.requestFocus();
  g.drawString(text,455,20);
  g.drawString(text,455,20);
  g.drawString(text,455,20);
  g.drawString(text,455,20);
  System.out.println("I'm at    btn2");
}

The system.out is for my troubleshooting. If you have a clue, I'd appreciate some help.
thanks,
dennis
(edited by Cindy to format code)
[This message has been edited by Cindy Glass (edited March 26, 2001).]

[Cindy Glass]

Try reading this painting tutorial: http://java.sun.com/docs/books/tutorial/uiswing/overview/draw.html
[This message has been edited by Cindy Glass (edited March 26, 2001).]

[Dennis Riggs]

Thanks for the tip. Although the link refers to swing, does the Opaque also work for AWT?
thanks,
dennis

[Cindy Glass]

Well the AWT components get their opaque window from the native window.
This is a rather old article disussing how to turn heavyweight AWT components into lightweight components - which is exactly what Swing does for you: http://java.sun.com/products//jdk/1.2/docs/guide/awt/designspec/lightweights.html

[Dennis Riggs]

You may consider me dense if you like. It seems maybe I haven't communicated my problem very well, or Java is much more verbose than I thought it was. When I run my code above, the expected system.out should be 1st: "I'm at Paint" then second, "I'm at btn 2" however just the oppisite occurs. In order to get around this, do I truely need to worry about Opaque, and lightweight controls? Or is there something I can do with my present code to solve the problem that Paint is actually called before my drawstring instead of after? thanks with your patience.

[Cindy Glass]

Sorry I though that they were two separate questions.
I would think that calling repaint inside paint would cause a problem, however let's move this to AWT/Swing and see if you get some better suggestions.