Hello. I am using the swap web maps in the same view. I want to create a legend for the web maps in the api. Is that possible yet?

BrandonPrice · ‎06-19-2017

Thanks in advance.

ChristopherSchreiber · ‎06-19-2017

Yes,

Here is an example using your html file.

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no">
  <title>Underground Utilities Caltrans District 7</title>

  <style>
    html,
    body {
      font-family: sans-serif;
      padding: 0;
      margin: 0;
      height: 100%;
      width: 100%;
      overflow: hidden;
       color: white;
       text-align: center;
    }
    
    #viewDiv {
      position: absolute;
      right: 0;
      left: 0;
      top: 0;
      bottom: 60px;
    }
     
    #viewy {
      position: absolute;
      width: 1150px;
      height: 40px;
      left: 10%;
       text-align: justify;
       z-index: 1;
       text-align: center;
       -webkit-text-stroke-width: 1.2px;
      -webkit-text-stroke-color: black;
       font-size: 35px
    }
     
    .footer {
      position: absolute;
      bottom: 0;
      width: 100%;
      height: 60px;
    }
    
    .btns {
      margin: 0 auto;
      display: flex;
      flex-direction: row;
      justify-content: center;
      align-items: center;
      overflow: auto;
    }
    
    .btn-switch {
      flex-grow: 4;
      background-color: #54A0CD;
      color: #FFF;
      margin: 1px;
      width: 50%;
      padding: 20px;
      overflow: auto;
      text-align: center;
      cursor: pointer;
      font-size: 0.7em;
    }
    
    .active-map {
      color: #fff;
      background-color: #54CDB4;
    }
  </style>

  <link rel="stylesheet" href="https://js.arcgis.com/4.3/esri/css/main.css">
  <script src="https://js.arcgis.com/4.3/"></script>
  
  <script>
    require([
       "dojo/dom-construct",
      "esri/views/MapView",
       "esri/widgets/Legend",
      "esri/WebMap",
       "esri/widgets/Search",
      "dojo/on",
      "dojo/domReady!"
    ], function(
      domConstruct, MapView, Legend, WebMap, Search,
      on
    ) {

      var webmapids = [
        "ba7b97b7d6b24c6381eba23062f8aab1",
        "7884594fbc904ac6bdb540727ff2f5d7",
        "bde977a8dcb34a719a1b0bc30df9542d",
          "e857341735434b67ae844244ae4701ca",
          "4818da5fb8de4fafaa5499b4873c1bd7",
      ];

      /************************************************************
       * Create multiple WebMap instances
       ************************************************************/
      var webmaps = webmapids.map(function(webmapid) {
        return new WebMap({
          portalItem: {
            id: webmapid
          }
        });
      });

      /************************************************************
       * Initialize the View with the first WebMap
       ************************************************************/
      var view = new MapView({
        map: webmaps[0],
        container: "viewDiv"
      });
      on(document.querySelector(".btns"), ".btn-switch:click", function(
        event) {
        /************************************************************
         * On a button click, change the map of the View
         ************************************************************/
        var id = event.target.getAttribute("data-id");
        if (id) {
          var webmap = webmaps[id];
          view.map = webmap;
          var nodes = document.querySelectorAll(".btn-switch");
          for (var idx = 0; idx < nodes.length; idx++) {
            var node = nodes[idx];
            var mapIndex = node.getAttribute("data-id");
            if (mapIndex === id) {
              node.classList.add("active-map");
            } else {
              node.classList.remove("active-map");
            }
          }
        }
      });
//******************* MY EDIT: ADD LEGEND HERE ***************************//
      var legend = new Legend({
          view: view
      });
//************************************** END MY EDITS ******************//
        var logo = domConstruct.create("img", {
        src: "https://onramp.dot.ca.gov/hq/paffairs/CT_No_Logotype/CT_logo_no_type.gif",
          style: "height:50px;width:80px;",
        id: "logo",
        title: "Office of Surveys, Geospatial Unit"
      });
       var search = new Search({
        view: view
       });
       view.ui.add(logo, "bottom-right");
       view.ui.add(search, "top-right");
       view.ui.add(legend, "top-right");
     });
  </script>
</head>

<body>
  <section class="footer">
    <div class="btns">
      <div class="btn-switch active-map" data-id="0">Caltrans Utilities</div>
      <div class="btn-switch" data-id="1">Electrical</div>
      <div class="btn-switch" data-id="2">Natural Gas</div>
       <div class="btn-switch" data-id="3">Wastewater</div>
       <div class="btn-switch" data-id="4">Water</div>
       <div class="btn-switch" data-id="5">Utility Listing</div>
    </div>
  </section>
  <div id="viewy"><b>Underground Utilities within Caltrans District 7<b></div>
  <div id="viewDiv"></div>
</body>

</html>‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

The styling is not the greatest, so you may want to fancy it up!

But it does work!

Chris

View solution in original post

ThomasSolow · ‎06-19-2017

Check out: Legend | API Reference | ArcGIS API for JavaScript 4.3

BrandonPrice · ‎06-19-2017

This says it is not possible yet in the known limitations.

ThomasSolow · ‎06-19-2017

Which part isn't possible?

BrandonPrice · ‎06-19-2017

Thanks for the help. It works. Easier than what I thought. ☺

ChristopherSchreiber · ‎06-19-2017

No problem!

Happy to help!

Don't forget to mark this question as "Answered"

ChristopherSchreiber · ‎06-19-2017

Yes,

Here is an example using your html file.

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no">
  <title>Underground Utilities Caltrans District 7</title>

  <style>
    html,
    body {
      font-family: sans-serif;
      padding: 0;
      margin: 0;
      height: 100%;
      width: 100%;
      overflow: hidden;
       color: white;
       text-align: center;
    }
    
    #viewDiv {
      position: absolute;
      right: 0;
      left: 0;
      top: 0;
      bottom: 60px;
    }
     
    #viewy {
      position: absolute;
      width: 1150px;
      height: 40px;
      left: 10%;
       text-align: justify;
       z-index: 1;
       text-align: center;
       -webkit-text-stroke-width: 1.2px;
      -webkit-text-stroke-color: black;
       font-size: 35px
    }
     
    .footer {
      position: absolute;
      bottom: 0;
      width: 100%;
      height: 60px;
    }
    
    .btns {
      margin: 0 auto;
      display: flex;
      flex-direction: row;
      justify-content: center;
      align-items: center;
      overflow: auto;
    }
    
    .btn-switch {
      flex-grow: 4;
      background-color: #54A0CD;
      color: #FFF;
      margin: 1px;
      width: 50%;
      padding: 20px;
      overflow: auto;
      text-align: center;
      cursor: pointer;
      font-size: 0.7em;
    }
    
    .active-map {
      color: #fff;
      background-color: #54CDB4;
    }
  </style>

  <link rel="stylesheet" href="https://js.arcgis.com/4.3/esri/css/main.css">
  <script src="https://js.arcgis.com/4.3/"></script>
  
  <script>
    require([
       "dojo/dom-construct",
      "esri/views/MapView",
       "esri/widgets/Legend",
      "esri/WebMap",
       "esri/widgets/Search",
      "dojo/on",
      "dojo/domReady!"
    ], function(
      domConstruct, MapView, Legend, WebMap, Search,
      on
    ) {

      var webmapids = [
        "ba7b97b7d6b24c6381eba23062f8aab1",
        "7884594fbc904ac6bdb540727ff2f5d7",
        "bde977a8dcb34a719a1b0bc30df9542d",
          "e857341735434b67ae844244ae4701ca",
          "4818da5fb8de4fafaa5499b4873c1bd7",
      ];

      /************************************************************
       * Create multiple WebMap instances
       ************************************************************/
      var webmaps = webmapids.map(function(webmapid) {
        return new WebMap({
          portalItem: {
            id: webmapid
          }
        });
      });

      /************************************************************
       * Initialize the View with the first WebMap
       ************************************************************/
      var view = new MapView({
        map: webmaps[0],
        container: "viewDiv"
      });
      on(document.querySelector(".btns"), ".btn-switch:click", function(
        event) {
        /************************************************************
         * On a button click, change the map of the View
         ************************************************************/
        var id = event.target.getAttribute("data-id");
        if (id) {
          var webmap = webmaps[id];
          view.map = webmap;
          var nodes = document.querySelectorAll(".btn-switch");
          for (var idx = 0; idx < nodes.length; idx++) {
            var node = nodes[idx];
            var mapIndex = node.getAttribute("data-id");
            if (mapIndex === id) {
              node.classList.add("active-map");
            } else {
              node.classList.remove("active-map");
            }
          }
        }
      });
//******************* MY EDIT: ADD LEGEND HERE ***************************//
      var legend = new Legend({
          view: view
      });
//************************************** END MY EDITS ******************//
        var logo = domConstruct.create("img", {
        src: "https://onramp.dot.ca.gov/hq/paffairs/CT_No_Logotype/CT_logo_no_type.gif",
          style: "height:50px;width:80px;",
        id: "logo",
        title: "Office of Surveys, Geospatial Unit"
      });
       var search = new Search({
        view: view
       });
       view.ui.add(logo, "bottom-right");
       view.ui.add(search, "top-right");
       view.ui.add(legend, "top-right");
     });
  </script>
</head>

<body>
  <section class="footer">
    <div class="btns">
      <div class="btn-switch active-map" data-id="0">Caltrans Utilities</div>
      <div class="btn-switch" data-id="1">Electrical</div>
      <div class="btn-switch" data-id="2">Natural Gas</div>
       <div class="btn-switch" data-id="3">Wastewater</div>
       <div class="btn-switch" data-id="4">Water</div>
       <div class="btn-switch" data-id="5">Utility Listing</div>
    </div>
  </section>
  <div id="viewy"><b>Underground Utilities within Caltrans District 7<b></div>
  <div id="viewDiv"></div>
</body>

</html>‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

The styling is not the greatest, so you may want to fancy it up!

But it does work!

Chris