UniqueValueGroup

// This example groups categories under three headings:
// Commercial, Residential, and Other
layer.renderer = {
  type: "unique-value",
  field: "zonecode",
  uniqueValueGroups: [{
    heading: "Commercial",
    classes: [{
      label: "C-2 | Community Commercial",
      symbol: createSymbol([255,179,219]),
      values: ["C-1", "C-2"]
    }, {
      label: "C-3 | Major Commercial",
      symbol: createSymbol([255,0,0]),
      values: "C-3"
    }]
  }, {
    heading: "Residential",
    classes: [{
      label: "R-1 | Low-Density Residential",
      symbol: createSymbol([255,255,224]),
      values: "R-1"
    }, {
      label: "R-3 | Limited High-Density Residential",
      symbol: createSymbol([255,214,0]),
      values: "R-3"
    }, {
      label: "R-4 | High-Density Residential",
      symbol: createSymbol([255,166,0]),
      values: "R-4",
    }]
  }, {
    heading: "Other",
    classes: [{
      label: "S | Special Area",
      symbol: createSymbol([161,237,237]),
      values: ["S-DW", "S-DR", "S-RP", "S-JW", "S-RN", "S-WS"]
    }]
  }]
};

Property Overview

Property Details

classes UniqueValueClass[]autocast

Specifies the classes (or unique categories) to group under a heading. Classes may be included without a heading when representing multiple values with a single symbol.

Example

commercialGroup.classes = [{
  label: "C-2 | Community Commercial",
  symbol: {
    type: "simple-fill",
    color: [255,179,219]
  },
  values: ["C-1", "C-2"]
}, {
  label: "C-3 | Major Commercial",
  symbol: {
    type: "simple-fill",
    color: 255,0,0
  },
  values: "C-3"
}];

declaredClass Stringreadonly inherited

The name of the class. The declared class name is formatted as esri.folder.className.

heading String

The heading to be displayed for the group of unique classes in the Legend.

Example

commercialGroup.heading = "Commercial";

Method Overview

Method Details

addHandles(handleOrHandles, groupKey)inherited

Adds one or more handles which are to be tied to the lifecycle of the object. The handles will be removed when the object is destroyed.

// Manually manage handles
const handle = reactiveUtils.when(
  () => !view.updating,
  () => {
    wkidSelect.disabled = false;
  },
  { once: true }
);

this.addHandles(handle);

// Destroy the object
this.destroy();

Parameters

handleOrHandles WatchHandle|WatchHandle[] Handles marked for removal once the object is destroyed.

groupKey * optional Key identifying the group to which the handles should be added. All the handles in the group can later be removed with Accessor.removeHandles(). If no key is provided the handles are added to a default group.

fromJSON(json){*}static

Creates a new instance of this class and initializes it with values from a JSON object generated from an ArcGIS product. The object passed into the input json parameter often comes from a response to a query operation in the REST API or a toJSON() method from another ArcGIS product. See the Using fromJSON() topic in the Guide for details and examples of when and how to use this function.

Parameter

json Object A JSON representation of the instance in the ArcGIS format. See the ArcGIS REST API documentation for examples of the structure of various input JSON objects.

Returns

Type	Description
*	Returns a new instance of this class.

hasHandles(groupKey){Boolean}inherited

Returns true if a named group of handles exist.

Parameter

groupKey * optional A group key.

Returns

Type	Description
Boolean	Returns true if a named group of handles exist.

Example

// Remove a named group of handles if they exist.
if (obj.hasHandles("watch-view-updates")) {
  obj.removeHandles("watch-view-updates");
}

removeHandles(groupKey)inherited

Removes a group of handles owned by the object.

Parameter

groupKey * optional A group key or an array or collection of group keys to remove.

Example

obj.removeHandles(); // removes handles from default group

obj.removeHandles("handle-group");
obj.removeHandles("other-handle-group");

toJSON(){Object}

Converts an instance of this class to its ArcGIS portal JSON representation. See the Using fromJSON() guide topic for more information.

Returns

Type	Description
Object	The ArcGIS portal JSON representation of an instance of this class.