flex 线图上加点！

基本的方法是在线图上画点！

代码如下：

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描点代码：
 private function addRender(event:Event):void            {                var factory:ClassFactory = new ClassFactory(LineSeriesItemRenderer);                factory.properties = {color:0xE48701};                (event.target as LineSeries).setStyle("itemRenderer", factory);            }                        private function addRenderM(event:Event):void            {                var factory:ClassFactory = new ClassFactory(LineSeriesItemRenderer);                factory.properties = {color:0x33FF66};                (event.target as LineSeries).setStyle("itemRenderer", factory);            }
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