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Showing content from https://developers.arcgis.com/javascript/latest/api-reference/esri-widgets-TimeZoneLabel.html below:

TimeZoneLabel | API Reference | ArcGIS Maps SDK for JavaScript 4.33

ESM: import TimeZoneLabel from "@arcgis/core/widgets/TimeZoneLabel.js";

CDN: const TimeZoneLabel = await $arcgis.import("@arcgis/core/widgets/TimeZoneLabel.js");

Class: @arcgis/core/widgets/TimeZoneLabel

Since: ArcGIS Maps SDK for JavaScript 4.28

TimeZoneLabel is widget for displaying the current time zone of the MapView. The widget has two states, collapsed as a small button and expanded displaying the internationalized name of the MapView's time zone. The user can toggle between these states by clicking the widget's expand/collapse button. By default the widget is collapsed.

The widget will expand to the right when the document's direction is set to ltr (left-to-right) unless the widget is added to the top-right to bottom-right View UI corners where it will expand towards the left. Similarly the opposite occurs when the document's direction is set to rtl.

To add the TimeZoneLabel to the upper right hand corner in the default collapsed state.

view.ui.add(new TimeZoneLabel({ view: view }), "top-right");

To add the TimeZoneLabel widget to the lower right hand corner of the View expanded.

view.ui.add(new TimeZoneLabel({ expanded: true, view: view }), "bottom-right");

Constructors

TimeZoneLabel Constructor new TimeZoneLabel(properties)

Parameter

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

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 case 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"
});

declaredClass Inherited Property declaredClass Stringreadonly: The name of the class. The declared class name is formatted as esri.folder.className.

When true, sets the widget to a disabled state so the user cannot interact with it.

Example

// Create the TimeZoneLabel widget.
const timeZoneLabel = new TimeZoneLabel({ view: view });

// Add the widget to the upper right hand corner of the view.
view.ui.add(timeZoneLabel, "top-right");

// Disable the widget when a user clicks a button.
document.getElementById("myButton").addEventListener("click", () => {
  timeZoneLabel.disable = true;
});

expandDirection Property expandDirection String

The direction the widget will expand.

By default, the widget will expand inward if assigned to a View UI corner. If the widget is positioned manually, the widget will expand towards the "end" which is equivalent to right in a LTR application.

Possible Values:"start" |"end"

Example

// Create a TimeZoneLabel widget that expands to towards the right (on a LTR application).
const timeZoneLabel = new TimeZoneLabel({ expandDirection: "end", view: view });

// Manually assign the widget to the View's UI.
view.ui.add(timeZoneLabel, "manual");

The expanded state of the widget. This property can be set to update expanded state or alternatively the expand() and collapse() methods can be used.

Example

// Create an expanded TimeZoneLabel widget.
const timeZoneLabel = new TimeZoneLabel({ expanded: true, view: view });

// Add the widget to the upper right hand corner of the view.
view.ui.add(timeZoneLabel, "top-right");

: Icon which represents the widget. It is typically used when the widget is controlled by another one (e.g. in the Expand widget).

id Inherited Property id String: 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.

The widget's label.

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

A reference to a MapView.

While this widget can be created without a reference to a MapView it is not very practical without one. A reference to a MapView is need for the widget to obtain the current time zone.

Example

// Create an expanded TimeZoneLabel widget.
const timeZoneLabel = new TimeZoneLabel({ expanded: true, view: view });

// Add the widget to the upper right hand corner of the view.
view.ui.add(timeZoneLabel, "top-right");

visible Inherited Property visible Boolean

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".

Example

// Hides the widget in the view
widget.visible = false;

Method Overview

Show inherited methods Hide inherited methods

Method Details

addHandles Inherited Method addHandles(handleOrHandles, groupKey)

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

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.

classes Inherited Method classes(classNames){String}

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

Returns

Type Description String The computed class name.

Example

// .tsx syntax showing how to set css classes while rendering the widget

render() {
  const dynamicClasses = {
    [css.flip]: this.flip,
    [css.primary]: this.primary
  };

  return (
    <div class={classes(css.root, css.mixin, dynamicClasses)} />
  );
}

destroy Inherited Method destroy(): Destroys the widget instance.

emit Inherited Method emit(type, event){Boolean}

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

Parameters

The name of the event.

optional

The event payload.

Returns

Type Description Boolean true if a listener was notified

hasEventListener Inherited Method hasEventListener(type){Boolean}

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

Returns

Type Description Boolean Returns true if the class supports the input event.

hasHandles Inherited Method hasHandles(groupKey){Boolean}

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");
}

isFulfilled Inherited Method isFulfilled(){Boolean}

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.

Returns

Type Description Boolean Indicates whether creating an instance of the class has been fulfilled (either resolved or rejected).

isRejected Inherited Method isRejected(){Boolean}

isRejected() may be used to verify if creating an instance of the class is rejected. If it is rejected, true will be returned.

Returns

Type Description Boolean Indicates whether creating an instance of the class has been rejected.

isResolved Inherited Method isResolved(){Boolean}

isResolved() may be used to verify if creating an instance of the class is resolved. If it is resolved, true will be returned.

Returns

Type Description Boolean Indicates whether creating an instance of the class has been resolved.

on Inherited Method on(type, listener){Object}

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

Returns

Type 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.

Example

view.on("click", function(event){
  // event is the event handle returned after the event fires.
  console.log(event.mapPoint);
});

postInitialize Inherited Method postInitialize(): Executes after widget is ready for rendering.

removeHandles Inherited Method removeHandles(groupKey)

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");

render Inherited Method render(){Object}

This method is implemented by subclasses for rendering.

Returns

Type Description Object The rendered virtual node.

renderNow Inherited Method renderNow(): Renders widget to the DOM immediately.

scheduleRender Inherited Method scheduleRender(): Schedules widget rendering. This method is useful for changes affecting the UI.

when Inherited Method when(callback, errback){Promise}

when() may be leveraged once an instance of the class is created. This method takes two input parameters: a callback function and an errback function. The callback executes when the instance of the class loads. The errback executes if the instance of the class fails to load.

Parameters

optional

The function to call when the promise resolves.

optional

The function to execute when the promise fails.

Returns

Type 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
});

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