[news.eclipse.platform.swt] Canvas vs Composite Question....

[kris.lyon@xxxxxxxxxx (Kris Lyon)]

I'm just starting out doing some custom control development and I'm 
running into what I hope is a simple problem.  From what I've read, I'm 
fairly certain that I understand the situations where you should subclass 
Composite vs Canvas.


For example: 

I would like to make a composite control made up of existing swt widgets, 
say a few labels and text boxes, however I'd like to surround them with a 
custom border.

If I subclass Canvas, im not sure how have the widgets display themselves 
on the canvas.

If I subclass Composite (which I believe is the right way to go) I can 
either have the controls draw themselves, OR draw the border.  It seems 
that if I set the layout on the Control the widgets that have been added 
to the custom control will display, but the paintListener (which draws my 
border on the composite) doesn't fire.  If no layout is set on the 
control, the widgets don't display, but the paintListener fires and the 
border is displayed fine.

I'm working from memory here, so I apologize in advance for any obvious 
programming errors...

Any help would be appreciated...

 -k




public class MyWidget extends Composite {

 public MyWidget( Composite parent, int style ){
   super( parent, style );

   Label first = new Label( this, SWT.NONE );
   first.setText("One");
   Label second = new Label( this, SWT.NONE );
   second.setText("Two");
   
   // If this line is commented out my paintControl method will be called 
and
   // I see only my custom rectangular border.
   //
   // If left un-commented, I see my widgets (labels) but no border.
   setLayout( new FillLayout(SWT.VERTICAL) );
   
   addPaintListener( new PaintListener() {
      public void paintControl( PaintEvent e ){
         MyWidget.this.paintControl(e);
      }
   });
 }


 public void paintControl( PaintEvent e ){
    GC gc = e.gc;  
    // Draw my custom border surrounding both labels here... 
 }


}