WheelViewLib/src/main/java/com/lukedeighton/wheelview/WheelView.java
private void updateSelectedPosition() {
        int position = (int) ((-mAngle + -0.5 * Math.signum(mAngle) * mItemAngle) / mItemAngle);
        setSelectedPosition(position);
    }
private void updateSelectedPosition() {
        int position = (int) ((-mAngle + -0.5 * Math.signum(mAngle) * mItemAngle) / mItemAngle);
        setSelectedPosition(position);
    }
Checks to see if the selectedPosition has changed.