arcgis js 3.x 之弹框拖动后添加引导线

arcgis js 3.x 之弹框拖动后添加引导线

效果：

原理：

1.先创建一个graphicLayer放到地图里面

2.通过map.infoWindow.openPopups获取到点的经纬度和弹框的屏幕坐标

3.通过map.toMap(new ScreenPoint(x,y)将屏幕坐标转换为经纬度

4.用两个点的经纬度在地图上面绘制一条虚线graphic

5.将线添加到map里面的graphicLayer里面

6.每40毫秒调用一下2~5步，每次调用前先清除一下graphicLayer里面的graphic

代码：

1.创建地图和graphicLayer

 

  var map

  var graphicsLayer

map = new Map("mapId", {
        logo:false,
        showAttribution: false
      })
      // 添加底图
      var tileInfo = new TileInfo({
        dpi: 90.71428571427429,
        rows: 256,
        cols: 256,
        compressionQuality: 0,
        origin: {
          x: -180,
          y: 90
        },
        spatialReference: {
          wkid: 4326
        },
      })
      var vecLayer = WebTiledLayer('http://{subDomain}.tianditu.com/DataServer?T=vec_c&x={col}&y={row}&l={level}&tk=42ed4b29c64f51d74daafc226d01064b', {
        subDomains: ['t0', 't1', 't2', 't3', 't4', 't5', 't6', 't7'],
        tileInfo: tileInfo
      })
      var labelLayer = WebTiledLayer('http://{subDomain}.tianditu.com/DataServer?T=cva_c&x={col}&y={row}&l={level}&tk=42ed4b29c64f51d74daafc226d01064b', {
        subDomains: ['t0', 't1', 't2', 't3', 't4', 't5', 't6', 't7'],
        tileInfo: tileInfo
      })
      map.addLayers([vecLayer, labelLayer])
　　　　// 添加引导线图层
      graphicsLayer = new GraphicsLayer()
      map.addLayer(graphicsLayer)
　　　　// 刷新引导线
      setInterval(() => {
        consol ()
      }, 40)
      // 定位
      var extent = new Extent({
        xmax: 116.720392,
        xmin: 116.102933,
        ymax: 40.011797,
        ymin: 39.809015,
        spatialReference: { wkid: 4326 }
      })
      map.setExtent(extent)

2.添加点图层

function getOtherFeatures (list) {
    var gras = []
    var json = {}
    var tempJson = {}
    for (var i = 0; i < list.length; i++) {
        tempJson = {
          "type":"Feature",
          "properties":{
            "Id": list[i].id,
            "name": list[i].name,
            "lon": list[i].gpsLon,
            "lat": list[i].gpsLat,
            "dzEventName": list[i].dzEventName,
            "remark": list[i].remark
          },
          "geometry":{
            "type":"Point",
            "dzEventName": list[i].dzEventName,
            "coordinates":[Number(list[i].gpsLon),Number(list[i].gpsLat)]
          }
      }
      gras.push(tempJson)
    }
    json.features = gras
    json.type = 'FeatureCollection'
    // 执行渲染点和弹窗方法
    addGeoJsonToMap_other(json)
  }
  // 其他不显示弹窗的点添加到地图
  function addGeoJsonToMap_other(data){
    require(["esri/map",
        "./geojsonlayer.js",
        "esri/geometry/Point",
        "esri/SpatialReference",
        "esri/geometry/ScreenPoint",
        "dojo/on",
        "dojo/dom",
        "dojo/domReady!"],
      function (Map, geojsonlayer, Point, SpatialReference,ScreenPoint,on, dom) {
        geoJsonLayer = {}
        geoJsonLayer = new geojsonlayer({
          baseMap:map,
          data: data,
          id: 'pointLayer_other'
        });
        geoJsonLayer.dataType="geojson";
        map.addLayer(geoJsonLayer);
      });
  }

3.添加、清除引导线方法

function consol () {
    require(["esri/map",
        "esri/Color",
        "esri/graphic",
        "esri/geometry/Point",
        "esri/geometry/Polyline",
        "esri/symbols/SimpleLineSymbol",
        "esri/SpatialReference",
        "esri/geometry/ScreenPoint",
        "dojo/on",
        "dojo/dom",
        "dojo/domReady!"],
      function (Map,Color,Graphic,Point,Polyline,SimpleLineSymbol, SpatialReference,ScreenPoint,on, dom) {
        //清除线
        graphicsLayer.clear()
        //获取当前打开的弹框
        let popups = map.infoWindow.openPopups
        popups.forEach((e) => {
          // 点坐标
          let p = e.location
          // 弹框坐标
          let offsetP = new ScreenPoint(e.domNode.offsetLeft + e.wrapperNode.offsetLeft, e.domNode.offsetTop)
          let winP = map.toMap(offsetP)
          // 生成线
          var paths = [[winP.x, winP.y],[p.x, p.y]];
          var line = new Polyline(paths);
          var sls = new SimpleLineSymbol(SimpleLineSymbol.STYLE_DASH,new Color([255,0,0]),3);
          var graphic = new Graphic(line,sls);
          graphicsLayer.add(graphic);
        })
    })
  }

钻研不易，转载请注明出处。。。。。。