Bug 285299

Description Andrei Diaconu 2009-07-31 12:15:38 EDT

For the following snippet, click on the tree to create a resize tracker, move the mouse outside the tree, and release the mouse button. You will notice that the tracker is not closed, and you can continue to change the tracker size if you move the mouse beck into the tree area. Also, many time, but not always, it leaves cheese on the application below (Eclipse), when the shell is closed.

If you change the type of variable "composite" from Tree to Composite, the tracker is disposed when you release the mouse button even if outside the shell.

import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.*;

public class TrackerBug {
	public static void main(String[] args) {
		final Display display = new Display();
		final Shell shell = new Shell(display);
		shell.setSize(200, 200);
		shell.setLayout(new FillLayout());

		final Composite composite = new Tree(shell, SWT.NONE);
		composite.addListener(SWT.MouseDown, new Listener() {
			@Override
			public void handleEvent(Event e) {
				final Tracker tracker = new Tracker(composite, SWT.RESIZE);
				tracker.setRectangles(new Rectangle[] {new Rectangle(e.x, e.y,
						0, 0)});
				tracker.open();
			}
		});

		shell.open();
		while (!shell.isDisposed()) {
			if (!display.readAndDispatch())
				display.sleep();
		}
		display.dispose();
	}
}