arcgis api for flex 地图选点画线 可拖动变色【写给已逝去的arcgis flex】

<?xml version="1.0" encoding="utf-8"?><viewer:BaseWidget xmlns:fx="http://ns.adobe.com/mxml/2009"   xmlns:s="library://ns.adobe.com/flex/spark"   xmlns:mx="library://ns.adobe.com/flex/mx"   xmlns:viewer="com.esri.viewer.*"   xmlns:esri="http://www.esri.com/2008/ags"   layout="absolute"   creationComplete="init()"   width="414"   height="214"><fx:Script source="script/Pathpoint.as"/><fx:Declarations><esri:PictureMarkerSymbol id="picStation3"  source="assets/images/widget/vehicle/stop.png"/><!-- 将非可视元素（例如服务、值对象）放在此处 --></fx:Declarations><mx:ColorPicker id="cpLine" selectedColor="{defaultDrawColor}" change="cpLine_changeHandler(event)" x="134" y="93" width="31" height="31"/></viewer:BaseWidget>

import com.adobe.serialization.json.JSONDecoder;import com.esri.ags.Graphic;import com.esri.ags.Map;import com.esri.ags.SpatialReference;import com.esri.ags.events.*;import com.esri.ags.geometry.Geometry;import com.esri.ags.geometry.MapPoint;import com.esri.ags.geometry.Polyline;import com.esri.ags.layers.GraphicsLayer;import com.esri.ags.symbols.PictureMarkerSymbol;import com.esri.ags.symbols.SimpleLineSymbol;import com.esri.ags.utils.WebMercatorUtil;import flash.events.MouseEvent;import flash.utils.*;import mx.collections.*;import mx.controls.*;import mx.core.UIComponent;import mx.effects.Glow;import mx.events.*;import mx.events.ListEvent;import mx.rpc.events.FaultEvent;import mx.rpc.events.ResultEvent;import mx.rpc.http.HTTPService;import spark.events.*;import spark.primitives.Line;private static var _instance:Pathpoint;private var _map:Map;[Bindable]private var _mapChanged:Boolean=false;[Bindable]private var defaultDrawColor:uint;private var pArray:Array=new Array;private var line:Polyline=new Polyline;private var candraw:Boolean=true;private var panoGraphic:Graphic;private var pointLayer:GraphicsLayer;private var lineLayer:GraphicsLayer;private var currentLineGraphic:Graphic;//--------------------------------------------------------------------------//  map//--------------------------------------------------------------------------public static function getInstance():Pathpoint{if (_instance == null)_instance=new Pathpoint();return _instance;}private function init():void{getInstance();widgetInit();}/** * 窗体初始化函数 */private function widgetInit():void{defaultDrawColor=0x3FAFDC;lineLayer=new GraphicsLayer();pointLayer=new GraphicsLayer();this.map.addLayer(lineLayer);this.map.addLayer(pointLayer);this.map.addEventListener(MapMouseEvent.MAP_CLICK, test_clickHandler);}protected function drag(event:DragEvent):void{this.map.addEventListener(MapMouseEvent.MAP_CLICK, test_clickHandler);}protected function clear(event:MouseEvent):void{pArray.length=0;lineLayer.clear();pointLayer.clear();}protected function test_clickHandler(event:MapMouseEvent):void{var mouseMapPoint:MapPoint=map.toMapFromStage(event.stageX, event.stageY);map.infoWindow.label="当前位置 共：" + (pArray.length + 1) + "个点";map.infoWindow.show(mouseMapPoint);var pointGraphic:Graphic=new Graphic(mouseMapPoint, picStation3);pointGraphic.toolTip=mouseMapPoint.x + "," + mouseMapPoint.y;pointGraphic.name="point";pArray.push(mouseMapPoint);line.addPath(pArray);pointLayer.add(pointGraphic);//0x22DD92var lineGraphic:Graphic=lineLayer.getChildByName("line") as Graphic || new Graphic();lineGraphic.name="line";lineGraphic.geometry=line;lineGraphic.symbol=new SimpleLineSymbol('solid', defaultDrawColor, 1, 5);if (!lineLayer.getChildByName("line"))lineLayer.add(lineGraphic);pointGraphic.addEventListener(MouseEvent.MOUSE_UP, enddrag);pointGraphic.addEventListener(MouseEvent.MOUSE_DOWN, startdrag);//map.removeEventListener(MapMouseEvent.MAP_CLICK,test_clickHandler);}/** * 开始拖动 * @param event */private function startdrag(event:MouseEvent):void{map.removeEventListener(MapMouseEvent.MAP_CLICK, test_clickHandler);var component:UIComponent=event.currentTarget as UIComponent;component.startDrag();}/** * 结束拖动 * @param event */private function enddrag(event:MouseEvent):void{var component:Graphic=event.currentTarget as Graphiccomponent.stopDrag();var m:MapPoint=map.toMapFromStage(event.stageX, event.stageY);component.toolTip=m.x + "," + m.y;map.infoWindow.show(m);component.geometry=m;trace(component.name);var idx:int=pointLayer.getChildIndex(component);idx=idx < 1 ? 0 : idx;line.setPoint(idx, idx, m);//lineGraphic.symbol=new SimpleLineSymbol('solid', 0x0000FF, 1, 5);pointLayer.refresh();lineLayer.refresh();map.addEventListener(MapMouseEvent.MAP_CLICK, test_clickHandler);}/** * 改变颜色 * @param event */protected function cpLine_changeHandler(event:ColorPickerEvent):void{defaultDrawColor=cpLine.selectedColor;if (lineLayer.getChildByName("line")){(lineLayer.getChildByName("line") as Graphic).symbol=new SimpleLineSymbol('solid', defaultDrawColor, 1, 5);lineLayer.refresh();}}