public void actionPerformed(ActionEvent event) {
DrawingTool dt = getDrawingTool();
GraphicAttributes ga = new GraphicAttributes();
ga.setLinePaint(Color.yellow);
if (dt != null) {
OMRangeRings rr = (OMRangeRings) getDrawingTool().create("com.bbn.openmap.omGraphics.OMRangeRings",
ga,
layer);
if (rr != null) {
// rr.setInterval(25, Length.MILE);
} else {