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AreaMeasurement3D

require(["esri/widgets/AreaMeasurement3D"], function(AreaMeasurement3D) { /* code goes here */ });
Class: esri/widgets/AreaMeasurement3D
Inheritance: AreaMeasurement3D Widget Accessor
Since: ArcGIS API for JavaScript 4.7

The AreaMeasurement3D widget calculates and displays the area and perimeter of a polygon. This widget can be used in a SceneView to measure the area and perimeter of a polygon.

measurement-line-3d

When the widget is active, a horizontal "laser" line is drawn which indicates the height at the current mouse position. This line can help in analyzing the heights of objects relative to each other and the terrain.

Known Limitations

This widget is designed to work with 3D SceneViews. For measurements with 2D MapViews, use AreaMeasurement2D.

For information about gaining full control of widget styles, see the Styling topic.
See also:
Example:
var measurementWidget = new AreaMeasurement3D({
  view: view
});

view.ui.add(measurementWidget, "top-right");

Constructors

new AreaMeasurement3D(properties)
Parameter:
properties Object
optional

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

Example:
// typical usage
var measurementWidget = new AreaMeasurement3D({
  view: view
});

Property Overview

Any properties can be set, retrieved or listened to. See the Working with Properties topic.
NameTypeSummaryClass
String|HTMLElement

The ID or node representing the DOM element containing the widget.

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more detailsWidget
String

The name of the class.

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more detailsAccessor
Boolean

When true, this property indicates whether the widget has been destroyed.

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more detailsWidget
String

The unique ID assigned to the widget when the widget is created.

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more detailsWidget
String

The widget's label.

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more detailsWidget
String

Unit system (imperial, metric) or specific unit used for displaying the area values.

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more detailsAreaMeasurement3D
String[]

List of available units and unit systems (imperial, metric) for displaying the area values.

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more detailsAreaMeasurement3D
SceneView

A reference to the SceneView.

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more detailsAreaMeasurement3D
AreaMeasurement3DViewModel

The view model for this widget.

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more detailsAreaMeasurement3D

Property Details

The ID or node representing the DOM element containing the widget. This property can only be set once. The following examples are all valid use cases when working with widgets.

Examples:
// Create the HTML div element programatically at runtime and set to the widget's container
const basemapGallery = new BasemapGallery({
  view: view,
  container: document.createElement("div")
});

// Add the widget to the top-right corner of the view
view.ui.add(basemapGallery, {
  position: "top-right"
});
// Specify an already-defined HTML div element in the widget's container

const basemapGallery = new BasemapGallery({
  view: view,
  container: basemapGalleryDiv
});

// Add the widget to the top-right corner of the view
view.ui.add(basemapGallery, {
  position: "top-right"
});

// HTML markup
<body>
  <div id="viewDiv"></div>
  <div id="basemapGalleryDiv"></div>
</body>
// Specify the widget while adding to the view's UI
const basemapGallery = new BasemapGallery({
  view: view
});

// Add the widget to the top-right corner of the view
view.ui.add(basemapGallery, {
  position: "top-right"
});
declaredClass Stringreadonly inherited

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

destroyed Boolean inherited

When true, this property indicates whether the widget has been destroyed.

The unique ID assigned to the widget when the widget is created. If not set by the developer, it will default to the container ID, or if that is not present then it will be automatically generated.

Since: ArcGIS API for JavaScript 4.11

The widget's label.

This property is useful whenever the widget is controlled by another one (e.g. Expand)

unit String
Since: ArcGIS API for JavaScript 4.8

Unit system (imperial, metric) or specific unit used for displaying the area values.

Possible Values: metric | imperial | square-inches | square-feet | square-us-feet | square-yards | square-miles | square-meters | square-kilometers | acres | ares | hectares

unitOptions String[]

List of available units and unit systems (imperial, metric) for displaying the area values. By default, the following units are included: metric, imperial, square-inches, square-feet, square-us-feet, square-yards, square-miles, square-meters, square-kilometers, acres, ares, hectares.

A reference to the SceneView. Set this to link the widget to a specific view.

The view model for this widget. This is a class that contains all the logic (properties and methods) that controls this widget's behavior. See the AreaMeasurement3DViewModel class to access all properties and methods on the widget.

Method Overview

NameReturn TypeSummaryClass
String

A utility method used for building the value for a widget's class property.

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more detailsWidget

Destroys the widget instance.

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more detailsWidget
Boolean

Emits an event on the instance.

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more detailsWidget
Boolean

Indicates whether there is an event listener on the instance that matches the provided event name.

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more detailsWidget
Object

Registers an event handler on the instance.

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more detailsWidget

Widget teardown helper.

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more detailsWidget

This method is primarily used by developers when implementing custom widgets.

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more detailsWidget
Object

This method is primarily used by developers when implementing custom widgets.

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more detailsWidget

Renders widget to the DOM immediately.

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more detailsWidget

This method is primarily used by developers when implementing custom widgets.

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more detailsWidget

Method Details

classes(classNames){String}inherited

A utility method used for building the value for a widget's class property. This aids in simplifying CSS class setup.

Parameter:
classNames (String|String[]|Object)[]
repeatable

The class names.

Returns:
TypeDescription
StringThe computed class name.
See also:
Example:
// .tsx syntax showing how to set CSS classes while rendering the widget

render() {
  const dynamicIconClasses = {
    [CSS.myIcon]: this.showIcon,
    [CSS.greyIcon]: !this.showIcon
  };

  return (
    <div class={classes(CSS.root, CSS.mixin, dynamicIconClasses)} />
  );
}
destroy()inherited

Destroys the widget instance.

emit(type, event){Boolean}inherited

Emits an event on the instance. This method should only be used when creating subclasses of this class.

Parameters:
type String

The name of the event.

event Object
optional

The event payload.

Returns:
TypeDescription
Booleantrue if a listener was notified
hasEventListener(type){Boolean}inherited

Indicates whether there is an event listener on the instance that matches the provided event name.

Parameter:
type String

The name of the event.

Returns:
TypeDescription
BooleanReturns true if the class supports the input event.
on(type, listener){Object}inherited

Registers an event handler on the instance. Call this method to hook an event with a listener.

Parameters:

A event type, or an array of event types, to listen for.

listener Function

The function to call when the event is fired.

Returns:
TypeDescription
ObjectReturns an event handler with a remove() method that can be called to stop listening for the event(s).
PropertyTypeDescription
removeFunctionWhen called, removes the listener from the event.
Example:
view.on("click", function(event){
  // event is the event handle returned after the event fires.
  console.log(event.mapPoint);
});
own(handles)inherited

Widget teardown helper. Any handles added to it will be automatically removed when the widget is destroyed.

Parameter:

Handles marked for removal once the widget is destroyed.

postInitialize()inherited

This method is primarily used by developers when implementing custom widgets. Executes after widget is ready for rendering.

render(){Object}inherited

This method is primarily used by developers when implementing custom widgets. It must be implemented by subclasses for rendering.

Returns:
TypeDescription
ObjectThe rendered virtual node.
renderNow()inherited

Renders widget to the DOM immediately.

scheduleRender()inherited

This method is primarily used by developers when implementing custom widgets. Schedules widget rendering. This method is useful for changes affecting the UI.

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