Quality Control request for a graphic layer script snippet

BrandonPrice · ‎06-02-2018

Can anybody find anything wrong with this? I want to check myself.

var text = new TextSymbol("Hello World");
var pt = new Point(-118.5, 34.5, map.spatialReference);
var graphic = new Graphic(pt, text);
map.graphic.show();

Thank you

RobertScheitlin__GISP · ‎06-04-2018

Brandon,

Not sure what you are missing but here is a working sample:

<!DOCTYPE html>
<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    <meta name="viewport" content="initial-scale=1, maximum-scale=1, user-scalable=no">
    <title>Labeling features client-side</title>
    <link rel="stylesheet" href="https://js.arcgis.com/3.24/esri/css/esri.css">
    <style>
      html, body, #map {
        height: 100%; width: 100%; margin: 0; padding: 0; 
      }
    </style>

   <script src="https://js.arcgis.com/3.24/"></script>
    <script>
      var map;
    
      require([
        "esri/map", 
        "esri/geometry/Extent",
        "esri/geometry/Point",
        "esri/layers/FeatureLayer",
        "esri/symbols/SimpleLineSymbol",
        "esri/symbols/SimpleFillSymbol",
        "esri/symbols/TextSymbol",
        "esri/renderers/SimpleRenderer",
        "esri/layers/LabelClass",
        "esri/Color",
        "esri/graphic",
         
        "dojo/domReady!"
      ], function(Map, Extent, Point, FeatureLayer,
                  SimpleLineSymbol, SimpleFillSymbol, 
                  TextSymbol, SimpleRenderer, LabelClass, Color, Graphic) 
      {
        // load the map centered on the United States
        var bbox = new Extent({"xmin": -1940058, "ymin": -814715, "xmax": 1683105, "ymax": 1446096, "spatialReference": {"wkid": 102003}});
      
        //create the map and set the extent, making sure to "showLabels"
        map = new Map("map", {
          extent: bbox,
          showLabels : true //very important that this must be set to true!   
        });
        
        var text = new TextSymbol("Hello World");
        var pt = new Point(-118.5, 34.5, map.spatialReference);
        var graphic = new Graphic(pt, text);

        // create a renderer for the states layer to override default symbology
        var statesColor = new Color("#666");
        var statesLine = new SimpleLineSymbol("solid", statesColor, 1.5);
        var statesSymbol = new SimpleFillSymbol("solid", statesLine, null);
        var statesRenderer = new SimpleRenderer(statesSymbol);
         
        // create the feature layer to render and label
        var statesUrl = "https://sampleserver6.arcgisonline.com/arcgis/rest/services/Census/MapServer/3";
        var states = new FeatureLayer(statesUrl, {
          id: "states",
          outFields: ["*"]
        });
        states.setRenderer(statesRenderer);


        // create a text symbol to define the style of labels
        var statesLabel = new TextSymbol().setColor(statesColor);
        statesLabel.font.setSize("14pt");
        statesLabel.font.setFamily("arial");

        //this is the very least of what should be set within the JSON  
        var json = {
          "labelExpressionInfo": {"value": "{STATE_NAME}"}
        };

        //create instance of LabelClass (note: multiple LabelClasses can be passed in as an array)
        var labelClass = new LabelClass(json);
        labelClass.symbol = statesLabel; // symbol also can be set in LabelClass' json
        states.setLabelingInfo([ labelClass ]);
        map.addLayer(states);
        map.on("load", function() {
          map.graphics.add(graphic);
        });
      });
    </script>
  </head>
  <body>
    <div id="map"></div>
  </body>
</html>‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

View solution in original post

RobertScheitlin__GISP · ‎06-03-2018

Brandon,

Are you adding the graphics to the map elsewhere in your code that you are not showing here?..

BrandonPrice · ‎06-04-2018

I was testing this in the sandbox first. I haven't added this to my file yet. I was going to add this right after I my creation of the dynamic layers in my map.

RobertScheitlin__GISP · ‎06-04-2018

Brandon,

But still if you do not add the graphic to the map them how is it going to show in the map?

BrandonPrice · ‎06-04-2018

You are right. I will test it out.

BrandonPrice · ‎06-04-2018

How is this?

var text = new TextSymbol("Hello World");
var pt = new Point(-118.5, 34.5, map.spatialReference);
var graphic = new Graphic(pt, text);

map.graphics.add(graphic);

RobertScheitlin__GISP · ‎06-04-2018

Brandon,

Not sure what you are missing but here is a working sample:

<!DOCTYPE html>
<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    <meta name="viewport" content="initial-scale=1, maximum-scale=1, user-scalable=no">
    <title>Labeling features client-side</title>
    <link rel="stylesheet" href="https://js.arcgis.com/3.24/esri/css/esri.css">
    <style>
      html, body, #map {
        height: 100%; width: 100%; margin: 0; padding: 0; 
      }
    </style>

   <script src="https://js.arcgis.com/3.24/"></script>
    <script>
      var map;
    
      require([
        "esri/map", 
        "esri/geometry/Extent",
        "esri/geometry/Point",
        "esri/layers/FeatureLayer",
        "esri/symbols/SimpleLineSymbol",
        "esri/symbols/SimpleFillSymbol",
        "esri/symbols/TextSymbol",
        "esri/renderers/SimpleRenderer",
        "esri/layers/LabelClass",
        "esri/Color",
        "esri/graphic",
         
        "dojo/domReady!"
      ], function(Map, Extent, Point, FeatureLayer,
                  SimpleLineSymbol, SimpleFillSymbol, 
                  TextSymbol, SimpleRenderer, LabelClass, Color, Graphic) 
      {
        // load the map centered on the United States
        var bbox = new Extent({"xmin": -1940058, "ymin": -814715, "xmax": 1683105, "ymax": 1446096, "spatialReference": {"wkid": 102003}});
      
        //create the map and set the extent, making sure to "showLabels"
        map = new Map("map", {
          extent: bbox,
          showLabels : true //very important that this must be set to true!   
        });
        
        var text = new TextSymbol("Hello World");
        var pt = new Point(-118.5, 34.5, map.spatialReference);
        var graphic = new Graphic(pt, text);

        // create a renderer for the states layer to override default symbology
        var statesColor = new Color("#666");
        var statesLine = new SimpleLineSymbol("solid", statesColor, 1.5);
        var statesSymbol = new SimpleFillSymbol("solid", statesLine, null);
        var statesRenderer = new SimpleRenderer(statesSymbol);
         
        // create the feature layer to render and label
        var statesUrl = "https://sampleserver6.arcgisonline.com/arcgis/rest/services/Census/MapServer/3";
        var states = new FeatureLayer(statesUrl, {
          id: "states",
          outFields: ["*"]
        });
        states.setRenderer(statesRenderer);


        // create a text symbol to define the style of labels
        var statesLabel = new TextSymbol().setColor(statesColor);
        statesLabel.font.setSize("14pt");
        statesLabel.font.setFamily("arial");

        //this is the very least of what should be set within the JSON  
        var json = {
          "labelExpressionInfo": {"value": "{STATE_NAME}"}
        };

        //create instance of LabelClass (note: multiple LabelClasses can be passed in as an array)
        var labelClass = new LabelClass(json);
        labelClass.symbol = statesLabel; // symbol also can be set in LabelClass' json
        states.setLabelingInfo([ labelClass ]);
        map.addLayer(states);
        map.on("load", function() {
          map.graphics.add(graphic);
        });
      });
    </script>
  </head>
  <body>
    <div id="map"></div>
  </body>
</html>‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

BrandonPrice · ‎06-06-2018

Thanks Robert. Would this be the best way to label something that is not in apart of a layers attribute table?

RobertScheitlin__GISP · ‎06-06-2018

Correct

BrandonPrice · ‎06-07-2018

Got it. Thanks Robert.