DEV Chart控件鼠标选中某条曲线

  this.Chart.ObjectSelected += new DevExpress.XtraCharts.HotTrackEventHandler(this.Chart_ObjectSelected);
            this.Chart.ObjectHotTracked += new DevExpress.XtraCharts.HotTrackEventHandler(this.Chart_ObjectHotTracked);
            Chart.SelectionMode = ElementSelectionMode.Single;
            //Chart.SeriesSelectionMode = SeriesSelectionMode.Point;

 public Series seriesSelected = null;
        public SeriesPoint pointSelected = null;
        public object selectedAnotherObject = null;
        bool SeriesSelection = true;

        protected virtual bool AllowSelectAnotherObject(object obj)
        {
            return false;
        }
        private void Chart_ObjectSelected(object sender, HotTrackEventArgs e)
        {
            if (e.Object is Series)
            {
                e.Cancel = !SeriesSelection;
                if (SeriesSelection) 
                {
                    this.seriesSelected = (Series)e.Object;
                    this.pointSelected = e.AdditionalObject as SeriesPoint;
                }
            }
            else
            {
                if (AllowSelectAnotherObject(e.Object))
                {
                    this.selectedAnotherObject = e.Object;
                    e.Cancel = false;
                }
                else
                {
                    this.selectedAnotherObject = null;
                    e.Cancel = true;
                    Chart.ClearSelection(false);
                }
                if (SeriesSelection)
                {
                    this.seriesSelected = null;
                    this.pointSelected = null;
                }
            }
        }

        private void Chart_ObjectHotTracked(object sender, HotTrackEventArgs e)
        {
            if (e.Object is Series)
                e.Cancel = !SeriesSelection;
            else
                e.Cancel = !AllowSelectAnotherObject(e.Object);
        }