int columnCount = data.getColumnCount();
                        for (int c = 0; c < columnCount; c++) {
                            double xx = axis.getCategoryJava2DCoordinate(
                                    anchor, c, columnCount, dataArea,
                                    domainAxisEdge);
                            CategoryItemRenderer renderer1 = getRenderer();
                            if (renderer1 != null) {
                                renderer1.drawDomainGridline(g2, this,
                                        dataArea, xx);