question: private boolean ensureScrollWheelAdjusted ( ) { int delta = mInitialScrollOffset - mCurrentScrollOffset ; if ( delta != 0 ) { if ( Math . abs ( delta ) > mSelectorElementSize / 2 ) { delta += ( delta > 0 ) ? - mSelectorElementSize : mSelectorElementSize ; } if ( isHorizontalMode ( ) ) { mPreviousScrollerX = 0 ; mAdjustScroller . startScroll ( 0 , 0 , delta , 0 , SELECTOR_ADJUSTMENT_DURATION_MILLIS ) ; } else { mPreviousScrollerY = 0 ; mAdjustScroller . startScroll ( 0 , 0 , 0 , delta , SELECTOR_ADJUSTMENT_DURATION_MILLIS ) ; } invalidate ( ) ; return true ; } return false ; }
target:  Ensures that the scroll wheel is adjusted i.e. there is no offset and the middle element is in the middle of the widget.