docs: @Override protected void handleEvents(final String EVENT_TYPE) {
          super.handleEvents(EVENT_TYPE);
          if ("RECALC".equals(EVENT_TYPE)) {
              range     = gauge.getRange();
              angleStep = -ANGLE_RANGE / range;
              redraw();
          } else if ("VISIBILITY".equals(EVENT_TYPE)) {
              Helper.enableNode(titleText, !gauge.getTitle().isEmpty());
          }
      }