@Override
    public void paintFeedback(Graphics2D g, Rectangle rc) {
      g.setColor(LightColors.YELLOW);
      if (rc.width == 1) {
        g.drawLine(rc.x, rc.y, rc.x, rc.y+rc.height);
      }
      else {
        g.drawLine(rc.x, rc.y, rc.x+rc.width, rc.y);
      }
    }
@Override
    public void paintFeedback(Graphics2D g, Rectangle rc)