var plottingEditMap, baseLayer, plottingLayer, plottingEdit, drawFeature;
        var mapurl ="http://localhost:8090/iserver/services/map-ShunYiQuPeiTu/rest/maps/顺义区配图";
        var serverUrl ="http://localhost:8090/iserver/services/plot-jingyong/rest/plot/";
        function init_() {
            plottingEditMap = new SuperMap.Map("plottingEditMap", {
                controls: [
                    new SuperMap.Control.LayerSwitcher(),
                    new SuperMap.Control.ScaleLine(),
                    new SuperMap.Control.Zoom(),
                    new SuperMap.Control.Navigation({
                        dragPanOptions: {
                            enableKinetic: true
                        }
                    })]
            });
            baseLayer = new SuperMap.Layer.TiledDynamicRESTLayer("顺义区配图", mapurl, {
                transparent: true,
                cacheEnabled: true
            }, {maxResolution: "auto"});
            baseLayer.events.on({"layerInitialized": addLayer});
            plottingLayer = new SuperMap.Layer.PlottingLayer("PlottingLayer", serverUrl);
            plottingEdit = new SuperMap.Control.PlottingEdit(plottingLayer);
            drawFeature = new SuperMap.Control.DrawFeature(plottingLayer, SuperMap.Handler.GraphicObject);
            drawFeature.events.on({"featureadded": drawCompleted});
            plottingEditMap.addControls([plottingEdit, drawFeature]);
            
            
            console.log("init:初始化方法");
        }
        function addLayer(){
             console.log("addLayer:添加图层");
            plottingEditMap.addLayers([baseLayer, plottingLayer]);
            plottingEditMap.setCenter(new SuperMap.LonLat(116.63505 , 40.17000), 3);         
        }
        function drawCompleted(){
            drawFeature.deactivate();
            plottingEdit.activate();
        }
        function editableChanges(){
            plottingLayer.isEditable = document.getElementById("editable").selectedIndex;
        }
        function lockedChanges(){
            plottingLayer.isLocked = document.getElementById("locked").selectedIndex;
        }
        function drawPolygon()
        {
            drawFeature.handler.serverUrl = serverUrl;
            drawFeature.handler.libID = 0;
            drawFeature.handler.symbolCode = 32;
            drawFeature.deactivate();
            drawFeature.activate();
        }
        document.oncontextmenu = function(evt){
            drawFeature.deactivate();
            return false;
        }
        
这是参考代码里面的模板  怎么获取鼠标绘画的坐标