BasemapGalleryViewModel

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

Provides the logic for the BasemapGallery widget.

See also

Constructors

BasemapGalleryViewModel

Constructor
new BasemapGalleryViewModel(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

The map's basemap.

BasemapGalleryViewModel

The name of the class.

Accessor

A collection of BasemapGalleryItems representing basemaps.

BasemapGalleryViewModel

The source for basemaps that the widget will display.

BasemapGalleryViewModel

The view model's state.

BasemapGalleryViewModel

The view from which the widget will operate.

BasemapGalleryViewModel

Property Details

activeBasemap

Property
activeBasemap Basemap

The map's basemap.

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.

items

Property
items Collection<BasemapGalleryItem>

A collection of BasemapGalleryItems representing basemaps.

The source for basemaps that the widget will display. This property can be autocast with an array or Collection of Basemaps, or a Portal instance. The default source is a PortalBasemapsSource that points to the default portal instance set in esriConfig.portalUrl.

state

Property
state Stringreadonly

The view model's state.

Possible Values:"ready" |"disabled"

Default Value:disabled

view

Property
view MapView |SceneView

The view from which the widget will operate. This view provides access to the active basemap via the view's map property.

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

A convenience function to check basemap equality.

BasemapGalleryViewModel

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.

basemapEquals

Method
basemapEquals(basemap1, basemap2){Boolean}

A convenience function to check basemap equality.

Parameters
basemap1 Basemap

The basemap to compare against basemap2.

basemap2 Basemap

The basemap to compare against basemap1.

Returns
Type Description
Boolean Returns true if both basemaps are equal, false otherwise.

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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