if (DEBUG_DRAW_LINK_AREA) {
            g2.setPaint(Color.blue);
            g2.draw(linkAreaXX);
            g2.setPaint(Color.yellow);
            g2.draw(new Ellipse2D.Double(linkAreaXX.getX(), linkAreaXX.getY(), 
                    linkAreaXX.getWidth(), linkAreaXX.getHeight()));