The BasemapToggle provides a widget which allows an end-user to switch between two basemaps. The toggled basemap is set inside the view's map object.
Starting with version 4.23, the BasemapToggle widget can have two basemaps with different spatial references.
Set the MapView.spatialReferenceLocked property to true
to disable basemaps in different spatial references and prevent users from changing the view's spatial reference at runtime.
// Create a map with an initial basemap
let map = new Map({
basemap: "streets-vector", // The initial basemap to toggle from
ground: "world-elevation"
});
// Reference the map in the view instance
let view = new SceneView({
container: "viewDiv",
map: map
});
let basemapToggle = new BasemapToggle({
view: view, // The view that provides access to the map's "streets-vector" basemap
nextBasemap: "hybrid" // Allows for toggling to the "hybrid" basemap
});
Constructors
-
new BasemapToggle(properties)
-
Parameterproperties Objectoptional
See the properties for a list of all the properties that may be passed into the constructor.
Example// typical usage let basemapToggle = new BasemapToggle({ view: view, nextBasemap: "satellite" });
Property Overview
Name | Type | Summary | Class |
---|---|---|---|
Basemap | The map's basemap. more details | BasemapToggle | |
String|HTMLElement | The ID or node representing the DOM element containing the widget. more details | Widget | |
String | The name of the class. more details | Accessor | |
String | The unique ID assigned to the widget when the widget is created. more details | Widget | |
String | The widget's default label. more details | BasemapToggle | |
Basemap | The next basemap for toggling. more details | BasemapToggle | |
MapView|SceneView | A reference to the MapView or SceneView. more details | BasemapToggle | |
BasemapToggleViewModel | The view model for this widget. more details | BasemapToggle | |
Boolean | Indicates whether the widget is visible. more details | Widget | |
VisibleElements | The visible elements that are displayed within the widget. more details | BasemapToggle |
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 programmatically 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" });
-
Since: ArcGIS Maps SDK for JavaScript 4.7
-
The name of the class. The declared class name is formatted as
esri.folder.className
.
-
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.
-
label String
-
The widget's default label.
-
The next basemap for toggling. One of the following values may be set to this property:
-
A reference to the MapView or SceneView. This view provides the BasemapToggle widget with access to the initial basemap to toggle from via the view's map property.
-
viewModel BasemapToggleViewModelautocast
-
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 BasemapToggleViewModel class to access all properties and methods on the widget.
-
Indicates whether the widget is visible.
If
false
, the widget will no longer be rendered in the web document. This may affect the layout of other elements or widgets in the document. For example, if this widget is the first of three widgets associated to the upper right hand corner of the view UI, then the other widgets will reposition when this widget is made invisible. For more information, refer to the CSS display value of"none"
.- Default Value:true
Example// Hides the widget in the view widget.visible = false;
-
visibleElements VisibleElementsSince: ArcGIS Maps SDK for JavaScript 4.15
-
The visible elements that are displayed within the widget. This property provides the ability to turn individual elements of the widget's display on/off.
ExamplebasemapToggle.visibleElements = { title: false };
Method Overview
Name | Return Type | Summary | Class |
---|---|---|---|
Adds one or more handles which are to be tied to the lifecycle of the object. more details | Accessor | ||
String | A utility method used for building the value for a widget's | Widget | |
Destroys the widget instance. more details | Widget | ||
Boolean | Emits an event on the instance. more details | Widget | |
Boolean | Indicates whether there is an event listener on the instance that matches the provided event name. more details | Widget | |
Boolean | Returns true if a named group of handles exist. more details | Accessor | |
Boolean |
| Widget | |
Boolean |
| Widget | |
Boolean |
| Widget | |
Object | Registers an event handler on the instance. more details | Widget | |
Adds one or more handles which are to be tied to the lifecycle of the widget. more details | Widget | ||
This method is primarily used by developers when implementing custom widgets. more details | Widget | ||
Removes a group of handles owned by the object. more details | Accessor | ||
Object | This method is primarily used by developers when implementing custom widgets. more details | Widget | |
Renders widget to the DOM immediately. more details | Widget | ||
This method is primarily used by developers when implementing custom widgets. more details | Widget | ||
Promise | Toggles to the next basemap. more details | BasemapToggle | |
Promise |
| Widget |
Method Details
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addHandles(handleOrHandles, groupKey)inheritedSince: 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();
ParametershandleOrHandles WatchHandle|WatchHandle[]Handles marked for removal once the object is destroyed.
groupKey *optionalKey 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.
-
Since: ArcGIS Maps SDK for JavaScript 4.7
-
A utility method used for building the value for a widget's
class
property. This aids in simplifying CSS class setup.Parameterrepeatable The class names.
ReturnsType Description String The computed class name. 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.
-
Since: ArcGIS Maps SDK for JavaScript 4.5
-
Emits an event on the instance. This method should only be used when creating subclasses of this class.
Parameterstype StringThe name of the event.
event ObjectoptionalThe event payload.
ReturnsType Description Boolean true
if a listener was notified
-
Indicates whether there is an event listener on the instance that matches the provided event name.
Parametertype StringThe name of the event.
ReturnsType Description Boolean Returns true if the class supports the input event.
-
Since: ArcGIS Maps SDK for JavaScript 4.25
-
Returns true if a named group of handles exist.
ParametergroupKey *optionalA group key.
ReturnsType 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"); }
-
Since: ArcGIS Maps SDK for JavaScript 4.19
-
isFulfilled()
may be used to verify if creating an instance of the class is fulfilled (either resolved or rejected). If it is fulfilled,true
will be returned.ReturnsType Description Boolean Indicates whether creating an instance of the class has been fulfilled (either resolved or rejected).
-
Since: ArcGIS Maps SDK for JavaScript 4.19
-
isRejected()
may be used to verify if creating an instance of the class is rejected. If it is rejected,true
will be returned.ReturnsType Description Boolean Indicates whether creating an instance of the class has been rejected.
-
Since: ArcGIS Maps SDK for JavaScript 4.19
-
isResolved()
may be used to verify if creating an instance of the class is resolved. If it is resolved,true
will be returned.ReturnsType Description Boolean Indicates whether creating an instance of the class has been resolved.
-
Registers an event handler on the instance. Call this method to hook an event with a listener.
ParametersAn event or an array of events to listen for.
listener FunctionThe function to call when the event fires.
ReturnsType Description Object Returns an event handler with a remove()
method that should be called to stop listening for the event(s).Property Type Description remove Function When called, removes the listener from the event. Exampleview.on("click", function(event){ // event is the event handle returned after the event fires. console.log(event.mapPoint); });
-
own(handleOrHandles)inheritedSince: ArcGIS Maps SDK for JavaScript 4.24
-
Adds one or more handles which are to be tied to the lifecycle of the widget. The handles will be removed when the widget is destroyed.
const handle = reactiveUtils.when( () => !view.updating, () => { wkidSelect.disabled = false; }, { once: true} ); this.own(handle); // Handle gets removed when the widget is destroyed.
ParameterhandleOrHandles WatchHandle|WatchHandle[]Handles marked for removal once the widget is destroyed.
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postInitialize()inherited
-
This method is primarily used by developers when implementing custom widgets. Executes after widget is ready for rendering.
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removeHandles(groupKey)inheritedSince: ArcGIS Maps SDK for JavaScript 4.25
-
Removes a group of handles owned by the object.
ParametergroupKey *optionalA group key or an array or collection of group keys to remove.
Exampleobj.removeHandles(); // removes handles from default group obj.removeHandles("handle-group"); obj.removeHandles("other-handle-group");
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This method is primarily used by developers when implementing custom widgets. It must be implemented by subclasses for rendering.
ReturnsType Description Object The rendered virtual node.
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renderNow()inherited
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Renders widget to the DOM immediately.
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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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toggle(){Promise}
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Toggles to the next basemap.
ReturnsType Description Promise Resolves after the widget has toggled to the next basemap.
-
Since: ArcGIS Maps SDK for JavaScript 4.19
-
when()
may be leveraged once an instance of the class is created. This method takes two input parameters: acallback
function and anerrback
function. Thecallback
executes when the instance of the class loads. Theerrback
executes if the instance of the class fails to load.Parameterscallback FunctionoptionalThe function to call when the promise resolves.
errback FunctionoptionalThe function to execute when the promise fails.
ReturnsType Description Promise Returns a new promise for the result of callback
.Example// Although this example uses the BasemapGallery widget, any class instance that is a promise may use when() in the same way let bmGallery = new BasemapGallery(); bmGallery.when(function(){ // This function will execute once the promise is resolved }, function(error){ // This function will execute if the promise is rejected due to an error });
Type Definitions
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VisibleElements
-
The visible elements that are displayed within the widget. This provides the ability to turn individual elements of the widget's display on/off.
- Property
-
title Boolean
Indicates whether to the title will be displayed. Default is
false
.