if (PlotOrientation.HORIZONTAL == l_orientation) {
            l_line = new Line2D.Double(l_y1, l_x1, l_y2, l_x2);
        }
        else if (PlotOrientation.VERTICAL == l_orientation) {
            l_line = new Line2D.Double(l_x1, l_y1, l_x2, l_y2);