Description Markus Keller 2007-01-22 06:48:52 EST

I20070116-1510

The Tracker flickers when using setRectangles(..) to hold it in place (like in bug 51081) and at the same time moving a shell around.

To reproduce, run the snippet below and drag the red rectangle around.


public class TrackerFlicker {
	public static void main(String[] args) {
		Display display= new Display();
		final Shell shell= new Shell(display);

		StyledText st= new StyledText(shell, SWT.WRAP | SWT.MULTI);
		st.setBounds(10, 20, 300, 200);
		shell.setSize(400, 300);
		shell.open();

		final Shell popup= new Shell(shell, SWT.ON_TOP | SWT.NO_TRIM);
		popup.setBackground(display.getSystemColor(SWT.COLOR_DARK_RED));
		final Rectangle popupRoot= new Rectangle(100, 100, 100, 50);
		popup.setBounds(popupRoot);
		popup.open();

		final Tracker tracker= new Tracker(st, SWT.NONE);
		final Rectangle trackedRoot= new Rectangle(1000000, 0, 0, 0);
		final Rectangle staticRubber= new Rectangle(100, 100, 100, 50);
		tracker.setRectangles(new Rectangle[] { trackedRoot,
				staticRubber });
		tracker.setStippled(true);
		tracker.addControlListener(new ControlAdapter() {
			public void controlMoved(ControlEvent e) {
				Rectangle tracked= tracker.getRectangles()[0];
				int x= popupRoot.x + tracked.x - trackedRoot.x;
				int y= popupRoot.y + tracked.y - trackedRoot.y;
				popup.setLocation(x, y);
				tracker.setRectangles(new Rectangle[] { tracked,
						staticRubber });
			}
		});
		
		popup.addMouseListener(new MouseAdapter() {
			public void mouseDown(MouseEvent e) {
				tracker.open();
			}
		});
		
		while (!shell.isDisposed()) {
			if (!display.readAndDispatch())
				display.sleep();
		}
		display.dispose();
	}
}