改寫flex4圖表組件提示信息，使其背景色與圖形相適應

/**
 * 鼠標移過圖形
 */
protected function itemRollOverHandler(event:ChartItemEvent):void {
				
				var pSI:PieSeriesItem = event.hitData.chartItem as PieSeriesItem;
				
				var rg:RadialGradient = pSI.fill as RadialGradient;
				var arr:Array = rg.entries;
				trace(arr[0])
				
				if (myTip) {
					myTip.text = s;
					myTip.x = chart.localToGlobal(point).x;
					myTip.y = chart.localToGlobal(point).y;
				} else {
					myTip = ToolTipManager.createToolTip(s, chart.localToGlobal(point).x, chart.localToGlobal(point).y, "errorTipAbove",
						IUIComponent(event.currentTarget)) as ToolTip;
				}
				myTip.visible = true;
			}

完整代碼見：