How to create a checkbox layer list using multiple layers ArcGIS Javascript

1502
1
04-19-2019 09:09 AM
JohnnyHarley
New Contributor

HI, 

   I have been surfing the web for days looking for an answer to this but it seems like this is not a common issue. My goal is to create a custom web map using JavaScript. I have multiple layers on ArcGIS Server that I wish to use a checkbox to select and unselect two different layers. I have crime maps in categories (rape, assault, dui, etc) but want to overlay each layer with census tract demographic data (mean age, owner/renter %). I want to make it so the crime maps are unselectable but the demographic polygons are. I also want an ESRI basemap to be included. Right now I have this for a code. Currently what I get from this is just one layer showing up. The checkbox shows up for that one layer (the assault code). 

      var layer, map, visible = [];
      require([
        "esri/map", "esri/layers/ArcGISDynamicMapServiceLayer",
        "dojo/dom", "dojo/on", "dojo/query", "dojo/_base/array",
        "dojo/domReady!"
      ], function(
        Map, ArcGISDynamicMapServiceLayer,
        dom, on, query, arrayUtils
      ) {

        map = new Map("map");
        layer = new ArcGISDynamicMapServiceLayer("http://gis.nwmissouri.edu/msgis642/rest/services/Harley/AGGASSAULT/MapServer");
        layer.on("load", buildLayerList);
        map.addLayer(layer);
        mean = new Map("mean");
        Mean = new ArcGISDynamicMapServiceLayer("http://gis.nwmissouri.edu/msgis642/rest/services/Harley/MEANAGE/MapServer");
        layer.on("load", buildLayerList);
        mean.addLayer(Mean);
        function buildLayerList() {
          var items = arrayUtils.map(layer.layerInfos, function(info, index) {
            if (info.defaultVisibility) {
              visible.push(info.id);
            }
            return "<input type='checkbox' class='list_item'" + (info.defaultVisibility ? "checked=checked" : "") + "' id='" + info.id + "'' /><label for='" + info.id + "'>" + info.name + "</label>";
          });
          var ll = dom.byId("layer_list");
          ll.innerHTML = items.join(' ');
          layer.setVisibleLayers(visible);
          on(ll, "click", updateLayerVisibility);
        }
        function updateLayerVisibility() {
          var inputs = query(".list_item");
          var input;
          visible = [];
          arrayUtils.forEach(inputs, function(input) {
            if (input.checked) {
              visible.push(input.id);
            }
          });
          //if there aren't any layers visible set the array to be -1
          if (visible.length === 0) {
            visible.push(-1);
          }
          layer.setVisibleLayers(visible);
        }
      });
    </script>
  </head>
Tags (2)
0 Kudos
1 Reply
JakeSkinner
Esri Esteemed Contributor

Here's an example with 3 layers (State, Cities, Rivers).  States and Rivers are able to be toggled on/off, but Cities is not:

<!DOCTYPE html>
<html>
<head>
  <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
  <!--The viewport meta tag is used to improve the presentation and behavior of the samples
    on iOS devices-->
  <meta name="viewport" content="initial-scale=1, maximum-scale=1,user-scalable=no">
  <title>Checkbox</title>
  <link rel="stylesheet" href="https://js.arcgis.com/3.28/dijit/themes/nihilo/nihilo.css">
  <link rel="stylesheet" href="https://js.arcgis.com/3.28/esri/css/esri.css">
  <link rel="stylesheet" href="css/layout.css">
  <style>
    html, body {
      height: 97%;
      width: 98%;
      margin: 1%;
    }

    #leftPane {
      width: 30%;
    }

    #pane1 {
      border: solid #97DCF2 1px;
    }
    #header{
      border: solid #C0C0C0 2px;
      background-color:#C0C0C0
    }
    #HomeButton {
      position: absolute;
      top: 98px;
      left: 26px;
      z-index: 50;
    }
    #legendPane {
      border: solid #97DCF2 1px;
    }
  </style>
  
  <script src="http://js.arcgis.com/3.28/"></script>
  <script>

    var map;
    require([
            "dojo/parser", "esri/map", "esri/dijit/HomeButton", "esri/layers/FeatureLayer", "dojo/on", "dojo/dom", "dojo/dom-construct", "esri/dijit/Legend", "dojo/_base/array", "dijit/form/CheckBox",  "esri/dijit/BasemapGallery", "esri/dijit/Geocoder",
            "esri/graphic", "esri/symbols/SimpleMarkerSymbol", "esri/geometry/screenUtils", "dijit/layout/BorderContainer", "dijit/layout/ContentPane", "dijit/layout/AccordionContainer", "dojo/domReady!"
    ], function(
      parser, Map, HomeButton, FeatureLayer, on, dom, domConstruct, Legend, array, CheckBox, BasemapGallery, Geocoder, Graphic, SimpleMarkerSymbol, screenUtils, Color,  domConstract, BorderContainer, ContentPane, AccordionContainer
    ) {
      parser.parse();
      //Create the map
      var map = new Map("map", {
        center: [-80.734, 28.297],
        zoom: 10,
        basemap: "topo"
      });
      //Add a home button
      var home = new HomeButton({
        map:map
      }, "HomeButton");
      home.startup();
      //Add Feature Layers

      var cities = new FeatureLayer(
          "http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Specialty/ESRI_StatesCitiesRivers_USA/MapServer/0", {
          mode: FeatureLayer.MODE_ONDEMAND,
          outFields: ["*"]
      });
      var rivers = new FeatureLayer(
          "http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Specialty/ESRI_StatesCitiesRivers_USA/MapServer/1", {
          mode: FeatureLayer.MODE_ONDEMAND,
          outFields: ["*"]
      });
      var states = new FeatureLayer(
          "http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Specialty/ESRI_StatesCitiesRivers_USA/MapServer/2", {
          mode: FeatureLayer.MODE_ONDEMAND,
          opacity: 0.5,
          outFields: ["*"]
      });

            //add the legend
      map.on("layers-add-result", function (evt) {
          var layerInfo = array.map(evt.layers, function (layer,
          index) {
              return {
                  layer: layer.layer,
                  title: layer.layer.name
              };
          });
          if (layerInfo.length > 0) {
              var legendDijit = new Legend({
                  map: map,
                  layerInfos: layerInfo
              }, "legendDiv");
              legendDijit.startup();
          }
                //add check boxes
          array.forEach(layerInfo,

          function (layer) {
              var layerName = layer.title;
              if(layerName != 'Cities'){
              var checkBox = new CheckBox({
                  name: "checkBox" + layer.layer.id,
                  value: layer.layer.id,
                  checked: layer.layer.visible,
                  onChange: function (evt) {
                      var clayer = map.getLayer(this.value);
                      clayer.setVisibility(!clayer.visible);
                      this.checked = clayer.visible;
                  }
              });
                    //add the check box and label to the TOC
              domConstruct.place(checkBox.domNode, "layers",
                  "after");
              var checkLabel = domConstruct.create('label', {
                  'for': checkBox.name,
                  innerHTML: layerName
              }, checkBox.domNode, "after");
              domConstruct.place("<br />", checkLabel,
                  "after");
           }
          });
      });
      map.addLayers([states, rivers, cities]);
      //Create the Basemap
      var basemapGallery = new BasemapGallery({
        showArcGISBasemaps: true,
        map: map
      }, "basemapGallery");
      basemapGallery.startup();
      basemapGallery.on("error", function(msg) {
        console.log("basemap gallery error:  ", msg);
        
        });
    });
  </script>

</head>
<body class="nihilo">
<div id="content" data-dojo-type="dijit/layout/BorderContainer" data-dojo-props="design:'headline', gutters:true" style="width: 100%; height: 100%; margin: 0;">
  <div id="header" data-dojo-type="dijit/layout/ContentPane" data-dojo-props="region:'top'">
  	<strong>Layer Checkbox</strong>
  </div>    
  <div id="leftPane"       data-dojo-type="dijit/layout/ContentPane" data-dojo-props="region:'left'">
    <div data-dojo-type="dijit/layout/AccordionContainer">
      <div data-dojo-type="dijit/layout/ContentPane" id="pane1" data-dojo-props="title:'Base Maps', selected:false">
        <div id="basemapGallery"></div>
      </div>
      <div data-dojo-type="dijit/layout/ContentPane" data-dojo-props="title:'Layers', selected:true">
          <span style="padding: 10px 0;">Click to toggle each layer on or off</span>
          <div id="layers"></div>
      </div>
      <div data-dojo-type="dijit/layout/ContentPane" id="legendPane" data-dojo-props="title:'Legend', selected:false">
        <div id="legendDiv"></div>
      </div>
    </div>
  </div>
  <div id="map" data-dojo-type="dijit/layout/ContentPane" data-dojo-props="region:'center'" style="overflow:hidden;">
  <div id="HomeButton"></div>
    
  </div>

</div>
</body>

</html>