@Override
		protected void fillShape(Graphics graphics) {
Rectangle r = (Rectangle) getBounds().getCopy();
			Point topLeft = r.getTopLeft();
			Point bottomRight = r.getBottomRight();
			Pattern pattern = new Pattern(Display.getCurrent(), topLeft.x,
					topLeft.y, bottomRight.x, bottomRight.y, color1, color2);
			graphics.setBackgroundPattern(pattern);
			graphics.fillOval((org.eclipse.draw2d.geometry.Rectangle) r);
			graphics.setBackgroundPattern(null);
			pattern.dispose();
}