if (plot instanceof CategoryPlot) {
                CategoryPlot p = (CategoryPlot) plot;
                CategoryItemRenderer r = p.getRenderer();
                if (r instanceof LineAndShapeRenderer) {
                    ((LineAndShapeRenderer) r).setLinesVisible(
                        this.drawLines.booleanValue()
                    );
                }
            }
            else if (plot instanceof XYPlot) {
                XYPlot p = (XYPlot) plot;
                XYItemRenderer r = p.getRenderer();
                if (r instanceof StandardXYItemRenderer) {
                    ((StandardXYItemRenderer) r).setPlotLines(
                        this.drawLines.booleanValue()