*/
protected void drawDomainGridlines(final GC g2, final Rectangle dataArea) {
// draw the domain grid lines, if any...
if (this.isDomainGridlinesVisible()) {
final CategoryAnchor anchor = this.getDomainGridlinePosition();
final RectangleEdge domainAxisEdge = this.getDomainAxisEdge();
final Stroke gridStroke = this.getDomainGridlineStroke();
final Color gridPaint = this.getDomainGridlinePaint();
if ((gridStroke != null) && (gridPaint != null)) {
// iterate over the categories