/** {@inheritDoc} */
protected void applyDelegateOwner(Object owner) {
if (this.rings == null) return;
for (SurfaceCircle ring : this.rings) {
ring.setDelegateOwner(owner);
}
}
/**
* Create a circle for a range ring.
*
* @return New circle.
*/
protected SurfaceCircle createCircle() {
SurfaceCircle circle = new SurfaceCircle();
circle.setDelegateOwner(this.getActiveDelegateOwner());
circle.setAttributes(this.getActiveShapeAttributes());
return circle;
}