public void paintThumb(Graphics g) {
        Icon icon = null;
        if (slider.getOrientation() == JSlider.HORIZONTAL) {
            if (isRollover && slider.isEnabled()) {
                icon = getThumbHorIconRollover();
            } else {
                icon = getThumbHorIcon();
            }
        } else {
            if (isRollover && slider.isEnabled()) {
                icon = getThumbVerIconRollover();
            } else {
                icon = getThumbVerIcon();
            }
        }
        Graphics2D g2D = (Graphics2D) g;
        Composite savedComposite = g2D.getComposite();
        if (!slider.isEnabled()) {
            g.setColor(AbstractLookAndFeel.getBackgroundColor());
            g.fillRect(thumbRect.x + 1, thumbRect.y + 1, thumbRect.width - 2, thumbRect.height - 2);
            AlphaComposite alpha = AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.6f);
            g2D.setComposite(alpha);
        }
        icon.paintIcon(null, g, thumbRect.x, thumbRect.y);
        g2D.setComposite(savedComposite);
    }