@Override
public void paintComponent(final Graphics g) {
super.paintComponent(g);
final int w = getWidth();
final int h = getHeight();
final int hh = h / 2;
final int s = (int) (3 * GUIConstants.SCALE);
g.setColor(hasFocus() ? GUIConstants.BACK : GUIConstants.lgray);
g.fillRect(0, hh - s, w, s * 2 - 1);
g.setColor(GUIConstants.TEXT);
g.drawLine(0, hh - s, w, hh - s);
g.drawLine(0, hh - s, 0, hh + s - 1);
g.setColor(GUIConstants.gray);
g.drawLine(w - 1, hh - s, w - 1, hh + s - 1);
g.drawLine(0, hh + s - 1, w, hh + s - 1);
final double x = (value - min) * (w - SLIDERW) / (max - min);
BaseXLayout.drawCell(g, (int) x, (int) (x + SLIDERW), hh - s * 2, hh + s * 2, oldValue != -1);
}