[platform-swt-dev] problem about Canvas' max size.

[Jiao Li <lijiao@xxxxxxxxxx>]

Hi,all
   I met some problems when
I use SWT's Canvas control. 
   When I draw on Canvas the
max size of Canvas only can extend to 32767, here I set the max size 33000
so I can see the effect.
   I don't know if this is
a bug of Canvas or this is Windows control feature.
   Can you give me some suggestions?
   The following is the code
I test.
   Platform: WinXP Prefessional,
Eclipse 3.0.1 RC.

   public class Scroll {

        public
static void main(String[] args) {
         
      Display display = new Display();
         
      Shell shell = new Shell(display);
         
     shell.setLayout(new FillLayout());
         
      ScrolledComposite sc = new ScrolledComposite(shell,
SWT.HORIZONTAL | SWT.VERTICAL);
         
      sc.setLayout(new FillLayout());
         
      final Canvas canvas = new Canvas(sc,0);
         
      canvas.setSize(33000, 200);
         
      sc.setContent(canvas);
         
      sc.setMinSize(33000,33000);
         
      sc.setExpandHorizontal(true);
         
      sc.setExpandVertical(true);
        
         
      canvas.addPaintListener(new PaintListener(){
       
         
              public
void paintControl(PaintEvent arg0) {
         
               
      // TODO Auto-generated method stub
         
               
      GC gc = arg0.gc;
         
               
      //here 33000 is bigger than 32767 so drawing
operations is end at 32767.
         
               
      gc.drawLine(0, 0, 33000, 200);
         
               
      gc.dispose();
         
              }
         
      });
        
         
      shell.open();
         
      while(!shell.isDisposed()){
         
              if(!display.readAndDispatch()){
         
               
      display.sleep();
         
              }
         
      }
         
      display.dispose();
        }
}