LineCallout3D

AMD: require(["esri/symbols/callouts/LineCallout3D"], (LineCallout3D) => { /* code goes here */ });
ESM: import LineCallout3D from "@arcgis/core/symbols/callouts/LineCallout3D";
Class: esri/symbols/callouts/LineCallout3D
Inheritance: LineCallout3D Callout3D Accessor
Since: ArcGIS Maps SDK for JavaScript 4.4

This type of callout displays a line to connect a symbol or a label with its actual location in the scene. For example when displaying points of interest in a city, visualizing them with a callout line helps to understand where the points are actually located:

symbol3D-line-callout

This visualization can be created on a PointSymbol3D or a LabelSymbol3D. After defining the symbolLayers, an offset should be defined by setting the verticalOffset property. The symbols are now shifted vertically, but we still need to add the callout, otherwise it can be very confusing to understand where the points are located:

symbol3D-line-callout

Setting the callout property of type line on the symbol will create the line that connects the symbol with its actual position:

symbol3D-line-callout

See also
Example
let symbol = {
  type: "point-3d",  // autocasts as new PointSymbol3D()
  symbolLayers: [{
    type: "icon",  // autocasts as new IconSymbol3DLayer()
    resource: {
      href: "CityHall.svg"
    },
    size: 20
  }],
  verticalOffset: {
    screenLength: 40,
    maxWorldLength: 100,
    minWorldLength: 20
  },
  callout: {
    type: "line", // autocasts as new LineCallout3D()
    size: 1.5,
    color: "white",
    border: {
      color: "black"
    }
  }
});

Constructors

new LineCallout3D(properties)
Parameter
properties Object
optional

See the properties for a list of all the properties that may be passed into the constructor.

Property Overview

Any properties can be set, retrieved or listened to. See the Working with Properties topic.
Show inherited properties Hide inherited properties
Name Type Summary Class
Accessor

The border settings of the callout line.

more details
LineCallout3D
Color

The color of the callout line.

more details
LineCallout3D
String

The name of the class.

more details
Accessor
Number

The width of the callout line in points.

more details
LineCallout3D
String For LineCallout3D the type is always "line". more detailsLineCallout3D

Property Details

The border settings of the callout line. The border of the callout line can be used to improve the contrast of the callout line color against various background colors. If the border is null, then no border will be visible.

Property
color Color
optional
Default Value:white
Autocasts from Object|Number[]|String

The color of the callout line border. This can be autocast with an array of rgb(a) values, named string, hex string or an hsl(a) string, an object with r, g, b, and a properties, or a Color object.

Autocasts from Object|Number[]|String

The color of the callout line. This can be autocast with an array of rgb(a) values, named string, hex string or an hsl(a) string, an object with r, g, b, and a properties, or a Color object.

Default Value:black
declaredClass Stringreadonly inherited
Since: ArcGIS Maps SDK for JavaScript 4.7

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

Autocasts from Number|String

The width of the callout line in points. This value may be autocast with a string expressing size in points or pixels (e.g. 12px).

Default Value:1px
type String

For LineCallout3D the type is always "line".

Method Overview

Show inherited methods Hide inherited methods
Name Return Type Summary Class

Adds one or more handles which are to be tied to the lifecycle of the object.

more details
Accessor
LineCallout3D

Creates a deep clone of the callout.

more details
LineCallout3D
*

Creates a new instance of this class and initializes it with values from a JSON object generated from an ArcGIS product.

more details
Callout3D
Boolean

Returns true if a named group of handles exist.

more details
Accessor

Removes a group of handles owned by the object.

more details
Accessor
Object

Converts an instance of this class to its ArcGIS portal JSON representation.

more details
Callout3D

Method Details

addHandles(handleOrHandles, groupKey)inherited
Since: ArcGIS Maps SDK for JavaScript 4.25

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 }
);

// Handle gets removed when the object is destroyed.
this.addHandles(handle);
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.

clone(){LineCallout3D}

Creates a deep clone of the callout.

Returns
Type Description
LineCallout3D A deep clone of the object that invoked this method.
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
Since: ArcGIS Maps SDK for JavaScript 4.25

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
Since: ArcGIS Maps SDK for JavaScript 4.25

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}inherited

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.

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