FeatureLayer 的Feature 的symbol使用renderer

定义个DataRenderer

<?xml version="1.0" encoding="utf-8"?>
<s:DataRenderer xmlns:fx="http://ns.adobe.com/mxml/2009"
				xmlns:s="library://ns.adobe.com/flex/spark" implements="mx.core.IFactory"
				xmlns:code="http://code.google.com/p/flex-iframe/"
				creationComplete="datarenderer1_creationCompleteHandler(event)"
				xmlns:mx="library://ns.adobe.com/flex/mx" xmlns:supportClasses="com.esri.ags.skins.supportClasses.*" xmlns:view="widgets.monitor.view.*" xmlns:template="com.depth.viewer.widget.template.*" xmlns:widget="com.depth.viewer.widget.*">
	
	<fx:Script>
		<![CDATA[
			import com.depth.viewer.facade.IocAppFacade;
			import com.esri.ags.Graphic;
			import com.esri.ags.layers.FeatureLayer;
			import com.xcsw.flex.facade.ConstFacade;
			
			import mx.controls.Alert;
			import mx.events.DragEvent;
			import mx.events.FlexEvent;
			import mx.events.MoveEvent;
			
			import widgets.map.util.MapUtil;
			/*
			
			只显示监控数据，雨量、水位、闸门开合度，没有视频
			*/
			protected function linkbutton3_clickHandler(event:MouseEvent):void
			{
				if(!data)//由渲染器使用者提供
					return;
				var feature:Graphic = data.feature as Graphic;
				var fl:FeatureLayer = feature.graphicsLayer as FeatureLayer;
				//获取水位站对应的ID
				var fId:String = feature.attributes[fl.layerDetails.objectIdField];
				var site:String=data.station;
				//水位信息警戒水位参数设置
				IocAppFacade.getInstance().sendNotification(IocAppFacade.LOAD_WIDGET,{id:"TriggerlevelWidget",runingParams:{ID:fId,tablename:"M_Waterlevel",site:site}});
			}
			
			
			public function newInstance():*{
				return new MonitorDataInfoSymbolRenderer();
			}
			
	
			protected function btnCloseButton_clickHandler(event:MouseEvent):void
			{
				if (currentState != "minState")
				{
					currentState = "minState";
				} 
			}
			
			
			protected function datarenderer1_creationCompleteHandler(event:FlexEvent):void
			{
				//addEventListener(MouseEvent.ROLL_OUT,rollOutHandler);
				//addEventListener(MouseEvent.ROLL_OVER,rollOverHandler);
			}
			
			private function rollOverHandler(event:MouseEvent):void
			{
				if (currentState == "minState")
				{
					currentState = "normal";
				}
			}
			
			private function rollOutHandler(event:MouseEvent):void
			{
				//var obj:Object=event.target;
			}
			
			
			protected function chkMonitorData_clickHandler(event:MouseEvent):void
			{
				var checkBox:CheckBox=event.target as CheckBox;
				switch(checkBox.label){
					case "雨量":
						if(checkBox.selected)							
							
							break;
					case "水位":
						if(checkBox.selected)
														
							
							break;
					case "闸门":						
						if(checkBox.selected)
							
							
							break;
				}
			}
				

			protected function btnExpandButton_clickHandler(event:MouseEvent):void
			{
				if (currentState == "minState")
				{
					currentState = "normal";
				}
			}

		]]>
	</fx:Script>
	
	<s:states>
		<s:State name="normal"/>
		<s:State name="minState"/>
	</s:states>
	
	<fx:Style>
		@namespace s "library://ns.adobe.com/flex/spark";
		@namespace mx "library://ns.adobe.com/flex/mx";
		.InfoExpandButton {
			disabledSkin: Embed(source="/assets/swf/skins2.swf",symbol="Callout_expandButtonDisabledSkin");
			downSkin: Embed(source="/assets/swf/skins2.swf",symbol="Callout_expandButtonDownSkin");
			overSkin: Embed(source="/assets/swf/skins2.swf",symbol="Callout_expandButtonOverSkin");
			upSkin: Embed(source="/assets/swf/skins2.swf",symbol="Callout_expandButtonUpSkin");
		}
		
		.InfoCloseButton {
			disabledSkin: Embed(source="/assets/swf/skins2.swf",symbol="Callout_closeButtonDisabledSkin");
			downSkin: Embed(source="/assets/swf/skins2.swf",symbol="Callout_closeButtonDownSkin");
			overSkin: Embed(source="/assets/swf/skins2.swf",symbol="Callout_closeButtonOverSkin");
			upSkin: Embed(source="/assets/swf/skins2.swf",symbol="Callout_closeButtonUpSkin");
		}
	</fx:Style>
	
	<fx:Declarations>
		<!-- 将非可视元素（例如服务、值对象）放在此处 -->
	</fx:Declarations>
	
	<s:VGroup width="100%">
		<s:HGroup verticalAlign="middle">
			<s:Label text="监控点："/>
			<mx:Button id="btnExpandButton"
					   width="18" height="18"
					   click="btnExpandButton_clickHandler(event)"
					   includeIn="minState"
					   styleName="InfoExpandButton"/>
			<mx:Button id="btnCloseButton" 
					   width="18" height="18"
					  includeIn="normal"
					  click="btnCloseButton_clickHandler(event)" 
					  styleName="InfoCloseButton" toolTip="关闭"/>
		</s:HGroup>
				
		<s:BorderContainer height="80" borderColor="#128EEE" includeIn="normal" >
			<s:layout>
				<s:VerticalLayout />
			</s:layout>
			
			<s:HGroup id="ghRain"  verticalAlign="middle" fontSize="25">
				<s:CheckBox id="chkMonitorDataRain" label="雨量" click="chkMonitorData_clickHandler(event)" />
				<s:Label text="：" />
			</s:HGroup>
			
			<s:HGroup id="hgWater" verticalAlign="middle">
				<s:CheckBox id="chkMonitorDataWater" label="水位" click="chkMonitorData_clickHandler(event)" />
				<s:Label text="：" />
			</s:HGroup>
			
			<s:HGroup id="hgFloodgate" verticalAlign="middle">
				<s:CheckBox id="chkMonitorDataFloodgate" label="闸门" click="chkMonitorData_clickHandler(event)" />
				<s:Label text="：" />
			</s:HGroup>	
		</s:BorderContainer>
		
		<s:Label text="当前时间：" includeIn="normal" />
	</s:VGroup>	
</s:DataRenderer>

使用该renderer

			protected function btnShowVideoInfo_clickHandler(event:MouseEvent):void
			{
				var videoLayerName:String="sde.SDE.MonitorPoint";
				//var videoLayerName:String="sde.SDE.RainMonitory";
				featureLayer=MapUtil.getFeatureLayerByName(videoLayerName);
				
				//featureLayer增加feature
				featureLayer.addEventListener(GraphicEvent.GRAPHIC_ADD,graphicAddedHandler);
				featureLayer.visible=true;
				
				/**
				 * feature添加处理函数
				 */ 
				function graphicAddedHandler(event:GraphicEvent):void{
/* 					var features:ArrayCollection=featureLayer.graphicProvider as ArrayCollection;
					for each(var feature:Graphic in features){
						displayFeatureInfoSymbol(feature);
					}  */
					displayFeatureInfoSymbol(event.graphic);
				}

	
			}
			private function displayFeatureInfoSymbol(feature:Graphic,data:Object=null):void{
				var infoSymbol:InfoSymbol=new InfoSymbol();
				infoSymbol.infoRenderer=new ClassFactory(MoniotorPointInfoSymbolRenderer);
				feature.symbol=infoSymbol;
				feature.alpha=0.8;
				//feature.visible=false;
			}