Bug 296074

Description ArronM 2009-11-24 22:30:22 EST

User-Agent:       Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.1.5) Gecko/20091102 Firefox/3.5.5
Build Identifier: SWT3621

If you have a table with a vertical scroll bar, and you try to scroll the table using the mouse wheel on a non-mac USB mouse (I've tried on a Dell USB mouse and a Logitech mouse), the SWT.Selection is not fired.  Using the trackpad or a mac mouse (bluetooth) works fine.

Snippet below.  Curiously (red herring?), scrolling via "two fingers" on a trackpad doesn't fire the MouseWheel event, but scrolling via the USB mouse does.

Tested on SWT 3621, but also present in 3.5.1 release build


Reproducible: Always

Steps to Reproduce:

	public static void main(String[] args) {
		Display display = new Display();
		Shell shell = new Shell(display, SWT.SHELL_TRIM);
		shell.setLayout(new FillLayout());

		
		final Table c = new Table(shell, SWT.VIRTUAL);
		
		c.setItemCount(5000);
		
		ScrollBar bar = c.getVerticalBar();
		
		bar.addListener(SWT.Selection, new Listener() {
			public void handleEvent(Event event) {
				System.out.println(event.time + "] Selection! Top now " + c.getTopIndex());
			}
		});
		
		c.addListener(SWT.MouseWheel, new Listener() {
			public void handleEvent(Event event) {
				System.out.println(event.time + "] MouseWheel! Top now " + c.getTopIndex());
			}
		});
		
		shell.open();

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