How to create a Ticks Scale in SWT? I need a switch that "jumps", not "slides"...

[Absurd]

Hi there.
I'm trying to create a ticks scale in SWT, where you can choose between 5 levels. Something similar to this:


(Ignore the volume label)

Where you can jump the switch from one level to another (but not in between levels).

The closest thing I could come is with is this:

public class Gui {

	public static void main(String[] args) {
		Gui g = new Gui();
		g.run();
	}

	private Shell shell;
	private Display display;

	public Gui() {
		display = new Display();
		shell = new Shell(display);
		shell.setSize(250, 250);

		// Scale
		Scale levels_scale = new Scale(shell, SWT.BALLOON | SWT.CENTER);
		levels_scale.setMinimum(1);
		levels_scale.setMaximum(5);
		levels_scale.setSelection(5);
		levels_scale.setIncrement(1);
		levels_scale.setPageIncrement(5);
		levels_scale.setSize(150,50);

	}

	public void run() {
		shell.open();
		// Set up the event loop.
		while (!shell.isDisposed()) {
			if (!display.readAndDispatch()) {
				// If no more entries in the event queue
				display.sleep();
			}
		}
		display.dispose();
	}
}

But this does not produce the desired output:



Actually you can't see it from the picture, but the slider slides smoothly from right to left and vice versa, instead of "jumping" from level to level.
In other words, I want a "jumper", and all I could find is "slider".
Can it be done, or this is the only option offered by SWT?

Any help would be greatly appreciated!
Thanks in advance.