public boolean computeScroll() {
        boolean needInvalidate = false;
        if (isScrollEnabled && chartScroller.computeScrollOffset(computator)) {
            needInvalidate = true;
        }
        if (isZoomEnabled && chartZoomer.computeZoom(computator)) {
            needInvalidate = true;
        }
        return needInvalidate;
    }
public boolean computeScroll ( ) { boolean needInvalidate = false ; if ( isScrollEnabled && chartScroller . computeScrollOffset ( computator ) ) { needInvalidate = true ; } if ( isZoomEnabled && chartZoomer . computeZoom ( computator ) ) { needInvalidate = true ; } return needInvalidate ; }
Computes scroll and zoom using {@link ChartScroller} and {@link ChartZoomer}. This method returns true if
scroll/zoom was computed and chart needs to be invalidated.