code: public void setSelection(int selectionDegrees, boolean isInnerCircle, boolean forceDrawDot) {
          mSelectionDegrees = selectionDegrees;
          mSelectionRadians = selectionDegrees * Math.PI / 180;
          mForceDrawDot = forceDrawDot;
  
          if (mHasInnerCircle) {
              if (isInnerCircle) {
                  mNumbersRadiusMultiplier = mInnerNumbersRadiusMultiplier;
              } else {
                  mNumbersRadiusMultiplier = mOuterNumbersRadiusMultiplier;
              }
          }
      }
docs: Set the selection.
  @param selectionDegrees The degrees to be selected.
  @param isInnerCircle Whether the selection should be in the inner circle or outer. Will be
  ignored if hasInnerCircle was initialized to false.
  @param forceDrawDot Whether to force the dot in the center of the selection circle to be
  drawn. If false, the dot will be drawn only when the degrees is not a multiple of 30, i.e.
  the selection is not on a visible number.