@Override
        public boolean onDown(MotionEvent e) {
            if (isRotationEnabled) {
                scroller.abortAnimation();
                return true;
            }

            return false;

        }
Reference to PieChartView to use some methods specific for that kind of chart.
hellocharts-library/src/lecho/lib/hellocharts/gesture/PieChartTouchHandler.java