XYLineAndShapeRenderer r = (XYLineAndShapeRenderer) plot.getRenderer();
r.setBaseShapesVisible(true);
r.setBaseShapesFilled(true);
r.setUseFillPaint(true);
r.setSeriesFillPaint(0, r.lookupSeriesPaint(0));
r.setSeriesFillPaint(1, r.lookupSeriesPaint(1));
//add selection specific rendering
IRSUtilities.setSelectedItemFillPaint(r, ext, Color.white);
//register plot as selection change listener