flex -设置柱状图ColumnChart的彩虹柱子、点击单个柱子高亮显示(三)

//实现彩虹柱子private function myFillFunction(element:ChartItem, index:Number):IFill {//四色柱子var c:SolidColor = new SolidColor(0x00CC00);var temp:int = index%4;if(0 == temp){ c.color = 0xEE716A;}else if(1 == temp){ c.color = 0xFEE05F;}else if(2 == temp){ c.color = 0x90CE99;}else{ c.color = 0x0983D3;}//简单的按值显示颜色/*var item:ColumnSeriesItem = ColumnSeriesItem(element);var profit:Number = Number(item.yValue);       if (profit >= 2) {return c;} else {c.color = 0xFF0000;}return c;*/}[Bindable]private var clickGroup:String = "";//图形点击事件private function columnseries2_clickHandler(event:ChartItemEvent):void   {   var temp:String=event.hitData.item.year;//横坐标clickGroup = temp;//赋值给变量var psi:ColumnSeriesItem= event.hitData.chartItem as ColumnSeriesItem;if(null != psi){changefunction(psi);}}   //改变单个柱子颜色，点击的柱子变成红色private function changefunction(psi:ColumnSeriesItem):void{if(psi != null){if (psi.item["year"]==clickGroup){line2.setStyle("fill",new SolidColor(0xEE5B58, 1));//line2为ColumnSeries的id，将点击柱子颜色改变line2.validateNow();}else{line2.setStyle("fill",new SolidColor(0x4197FF));//柱子原来的颜色line2.validateNow();}}}//必须使用fillfunction，不然所有line2的柱子都变红了private function fillfunction2(item:ChartItem, index:Number):IFill{var psi:ColumnSeriesItem = ColumnSeriesItem(item);if (psi.item["year"] == clickGroup){return (new SolidColor(0xEE5B58, 1)); //红色}return (new SolidColor(0x4197FF));//蓝色}