Bug 202957

Description Grant Gayed 2007-09-11 13:34:55 EDT

note that problem does not happen on win2000

- run the snippet below
- click repeatedly on the scrollbars such that they are not moved
  -> you'll see "paint" written to stdout for each click, which should not happen since the viewport did not change
- if you remove the SWT.RIGHT_TO_LEFT style from the snippet then you won't get the unexpected Paint events

public static void main(String[] args) {
	final Display display = Display.getDefault();
	final Shell shell = new Shell(display, SWT.RESIZE | SWT.CLOSE | SWT.RIGHT_TO_LEFT);
	shell.setLayout(new FillLayout());
	final ScrolledComposite scrolledC = new ScrolledComposite(shell, SWT.H_SCROLL | SWT.V_SCROLL);
	scrolledC.setLayout(new FillLayout());
	final Canvas canvas = new Canvas(scrolledC, SWT.NONE);
	final PaintListener paintListener = new PaintListener() {
		public void paintControl(PaintEvent e) {
			System.out.println("paint");
		}
	};
	canvas.addPaintListener(paintListener);
	scrolledC.setContent(canvas);
	scrolledC.setExpandHorizontal(true);
	scrolledC.setExpandVertical(true);
	scrolledC.setMinSize(350, 350);
	shell.setSize(300, 300);
	shell.open();
	while (!shell.isDisposed()) {
		if (!display.readAndDispatch()) display.sleep();
	}
	display.dispose();
}