ExpandViewModel

AMD: require(["esri/widgets/Expand/ExpandViewModel"], (ExpandVM) => { /* code goes here */ });
ESM: import ExpandVM from "@arcgis/core/widgets/Expand/ExpandViewModel.js";
Class: esri/widgets/Expand/ExpandViewModel
Inheritance: ExpandViewModel Accessor
Since: ArcGIS Maps SDK for JavaScript 4.3

Provides the logic for the Expand widget.

See also

Constructors

ExpandViewModel

Constructor
new ExpandViewModel(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
Boolean

Automatically collapses the expand widget instance when the view's viewpoint updates.

ExpandViewModel
String

The name of the class.

Accessor
Boolean

Whether the widget is currently expanded or not.

ExpandViewModel
String

This value associates two or more Expand widget instances with each other, allowing one instance to auto collapse when another instance in the same group is expanded.

ExpandViewModel
String

The view model's state.

ExpandViewModel
MapView|SceneView

The view in which the Expand is used.

ExpandViewModel

Property Details

autoCollapse

Property
autoCollapse Boolean

Automatically collapses the expand widget instance when the view's viewpoint updates.

Default Value:false

declaredClass

Inherited
Property
declaredClass Stringreadonly
Inherited from Accessor
Since: ArcGIS Maps SDK for JavaScript 4.7 Accessor since 4.0, declaredClass added at 4.7.

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

expanded

Property
expanded Boolean

Whether the widget is currently expanded or not.

Default Value:false

group

Property
group String
Since: ArcGIS Maps SDK for JavaScript 4.6 ExpandViewModel since 4.3, group added at 4.6.

This value associates two or more Expand widget instances with each other, allowing one instance to auto collapse when another instance in the same group is expanded. For auto collapsing to take effect, all instances of the group must be included in the view.ui.

For example, if you place multiple Expand instances in the top-left of the view's ui, you can assign them to a group called top-left. If one Expand instance is expanded and the user clicks on a different instance in the top-left group, then the first instance is collapsed, allowing the content of the second instance to be fully visible.

See also

state

Property
state Stringreadonly

The view model's state.

Possible Values:"ready"|"disabled"

Default Value:disabled

view

Property
view MapView|SceneView

The view in which the Expand is used.

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
Boolean

Returns true if a named group of handles exist.

Accessor

Removes a group of handles owned by the object.

Accessor

Method Details

addHandles

Inherited
Method
addHandles(handleOrHandles, groupKey)
Inherited from Accessor
Since: ArcGIS Maps SDK for JavaScript 4.25 Accessor since 4.0, addHandles added at 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 Accessor since 4.0, hasHandles added at 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 Accessor since 4.0, removeHandles added at 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");

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