@Override protected void invalidated() {
                    final double ANGLE_RANGE = get();
                    if (ANGLE_RANGE < 0 || ANGLE_RANGE > 360) set(clamp(0.0, 360.0, ANGLE_RANGE));
                    setAngleStep(get() / getRange());
                    if (isAutoScale()) { calcAutoScale(); }
                    fireTileEvent(RECALC_EVENT);
                }
Defines the angle range in degree that will be used to draw the scale
of the radial tile. The given range will be clamped in the range of
0 - 360 degrees. The range will start at the startAngle and will be
drawn in the direction dependent on the scaleDirection.

@param RANGE
src/main/java/eu/hansolo/tilesfx/Tile.java