private static void drawRollover(Graphics2D g, int width, int height) {
        Color color1 = Color.white;
        Color color2 = new Color(0xc0, 0xc0, 0xc0);
        Composite oldComposite = g.getComposite();
        g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, 0.25f));
        g.setPaint(new GradientPaint(0, 0, color1, width, height, color2));
        g.fillRoundRect(0, 0, width, height, 4, 4);
        g.setComposite(oldComposite);
    }