CompassViewModel

AMD: require(["esri/widgets/Compass/CompassViewModel"], (CompassVM) => { /* code goes here */ });
ESM: import CompassVM from "@arcgis/core/widgets/Compass/CompassViewModel.js";
Class: esri/widgets/Compass/CompassViewModel
Inheritance: CompassViewModelAccessor
Since: ArcGIS Maps SDK for JavaScript 4.0

Provides the logic for the Compass widget.

The Compass indicates where north is in relation to the current view rotation or camera heading. This is added to a SceneView by default.

See also
Example
let view = new MapView({
  container: "viewDiv",
  map: map
});

let compass = new Compass({
  viewModel: {  // autocasts as new CompassViewModel()
    view: view
  })
}, "compassDiv");

Constructors

CompassViewModel

Constructor
new CompassViewModel(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 Watch for changes topic.
Show inherited properties Hide inherited properties
Name Type Summary Class

The name of the class.

Accessor

This function provides the ability to override either the MapView goTo() or SceneView goTo() methods.

CompassViewModel

The z axis orientation.

CompassViewModel

The view model's state.

CompassViewModel

The view in which the Compass obtains and indicates camera heading, using a (SceneView) or rotation (MapView).

CompassViewModel

Property Details

declaredClass

Inherited
Property
declaredClass Stringreadonly
Inherited from Accessor
Since: ArcGIS Maps SDK for JavaScript 4.7

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

goToOverride

Property
goToOverride GoToOverride |null |undefined
Since: ArcGIS Maps SDK for JavaScript 4.8

This function provides the ability to override either the MapView goTo() or SceneView goTo() methods.

See also
Example
// The following snippet uses the Search widget but can be applied to any
// widgets that support the goToOverride property.
search.goToOverride = function(view, goToParams) {
  goToParams.options = {
    duration: updatedDuration
  };
  return view.goTo(goToParams.target, goToParams.options);
};

orientation

Property
orientation Orientationreadonly

The z axis orientation.

Default Value:{ z: 0 }

state

Property
state Stringreadonly

The view model's state.

Possible Values:"compass" |"rotation" |"disabled"

Default Value:"disabled"

view

Property
view MapView |SceneView |null |undefined

The view in which the Compass obtains and indicates camera heading, using a (SceneView) or rotation (MapView).

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.

Accessor

Returns true if a named group of handles exist.

Accessor

Removes a group of handles owned by the object.

Accessor

If working in a MapView, sets the view's rotation is to 0.

CompassViewModel

Method Details

addHandles

Inherited
Method
addHandles(handleOrHandles, groupKey)
Inherited from Accessor
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 }
);

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.

hasHandles

Inherited
Method
hasHandles(groupKey){Boolean}
Inherited from Accessor
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

Inherited
Method
removeHandles(groupKey)
Inherited from Accessor
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");

reset

Method
reset()

If working in a MapView, sets the view's rotation is to 0. If working in a SceneView, sets the camera's heading to 0.

This method is executed each time the Compass is clicked.

Type Definitions

Orientation

Type Definition
Orientation

The z axis orientation.

Property
z Number
optional

z axis orientation.

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