UI | API Reference | ArcGIS Maps SDK for JavaScript 4.31

This class provides a simple interface for adding, moving and removing components from a view's user interface (UI). In most cases, you will work with the view's DefaultUI which places default widgets, such as Zoom and Attribution in the View.

The UI class provides the API for easily placing HTML elements and widgets within the view. See DefaultUI for details on working with this class.

See also

Constructors

UI Constructor new UI(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 Watch for changes topic.

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Type	Summary	Class
HTMLElement	The HTML Element that contains the view.	UI
String	The name of the class.	Accessor
Number	The height of the UI container.	UI
Object\|Number	Defines the padding for the UI from the top, left, right, and bottom sides of the container or View.	UI
MapView\|SceneView	The view associated with the UI components.	UI
Number	The width of the UI container.	UI

Property Details

container Property container HTMLElement

The HTML Element that contains the view.

See also

View.container

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.

height Property height Numberreadonly

The height of the UI container.

padding Property padding Object |Number

Defines the padding for the UI from the top, left, right, and bottom sides of the container or View. If the value is a number, it will be used to pad all sides of the container.

Default Value:{ left: 15, top: 15, right: 15, bottom: 15 }

Example

// Setting a single number to this property
ui.padding = 0;
// is the same as setting it on all properties of the object
ui.padding = { top: 0, left: 0, right: 0, bottom: 0 };

view Property view MapView |SceneView

The view associated with the UI components.

width Property width Numberreadonly

The width of the UI container.

Method Overview

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Return Type	Summary	Class
	Adds one or more HTML component(s) or widgets to the UI.	UI
	Adds one or more handles which are to be tied to the lifecycle of the object.	Accessor
	Removes all components from a given position.	UI
HTMLElement\|Widget	Find a component by widget or DOM ID.	UI
Array<(Widget\|HTMLElement)>	Returns all widgets and/or HTML elements in the view, or only components at specified positions in the view.	UI
Boolean	Returns true if a named group of handles exist.	Accessor
	Moves one or more UI component(s) to the specified position.	UI
	Removes one or more HTML component(s) or widgets from the UI.	UI
	Removes a group of handles owned by the object.	Accessor

Method Details

add Method add(component, position)

Adds one or more HTML component(s) or widgets to the UI.

Parameters

Specification

component Widget|HTMLElement|String|Object|Array

The component(s) to add to the UI. This can be a widget instance, HTML element, a string value representing a DOM node ID, or an array containing a combination of any of those types. See the example snippets below for code examples. Alternatively, you can pass an array of objects with the following specification.

Specification

component Widget|HTMLElement|String

The component to add to the UI. This can be a widget instance, HTML element, a string value representing a DOM node ID.

position String

optional

The position in the view at which to add the component. If not specified, manual is used by default. Using manual allows you to place the component in a container where you can position it anywhere using css. For the other possible values, "top", "bottom", "left", and "right" are consistent placements. The "leading" and "trailing" values depend on whether the browser is using right-to-left (RTL) or left-to-right (LTR). For LTR, "leading" is left and "trailing" is right. For RTL, "leading" is right and "trailing" is left.

index Number

optional

The placement index of the component. This index shows where to place the component relative to other components. For example a value of 0 would place it topmost when position is top-*, leftmost for bottom-left and right most for bottom-right.

position String|Object

optional

Specification

position String

optional

index Number

optional

The placement index of the component(s). This index shows where to place the component relative to other components. For example a value of 0 would place it topmost when position is top-*, leftmost for bottom-left and right most for bottom-right.

Examples

let toggle = new BasemapToggle({
  view: view,
  nextBasemap: "hybrid"
});
// Adds an instance of BasemapToggle widget to the
// top right of the view's container.
view.ui.add(toggle, "top-right");

// Adds multiple widgets to the top right of the view
view.ui.add([ compass, toggle ], "top-leading");

// Adds multiple components of different types to the bottom left of the view
view.ui.add([ searchWidget, "infoDiv" ], "bottom-left");

// Adds multiple components of various types to different view positions
view.ui.add([
  {
    component: compassWidget,
    position: "top-left",
    index: 0
  }, {
    component: "infoDiv",
    position: "bottom-trailing"
  }, {
    component: searchWidget,
    position: "top-right",
    index: 0
  }, {
    component: legendWidgetDomNode,
    position: "top-right",
    index: 1
  }
]);

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.

empty Method empty(position)

Removes all components from a given position.

Parameter

position String

optional

Example

// Removes all of the elements in the top-left of the view's container
// including the default widgets zoom and compass (if working in SceneView)
view.ui.empty("top-left");

find Method find(id){HTMLElement |Widget}

Find a component by widget or DOM ID.

Parameter

id String

The component's ID.

Returns

Type	Description
HTMLElement \| Widget	Returns the Widget or HTMLElement if the id is found, otherwise returns `null`.

Example

let compassWidget = new Compass({
  view: view,
  id: "myCompassWidget" // set an id to get the widget with find
});

// Add the Compass widget to the top left corner of the view
view.ui.add(compassWidget, "top-left");

// Find the Widget with the specified ID
let compassWidgetFind = view.ui.find("myCompassWidget"))

getComponents Method getComponents(position){Array<(Widget|HTMLElement)>} Since: ArcGIS Maps SDK for JavaScript 4.27 UI since 4.0, getComponents added at 4.27.

Returns all widgets and/or HTML elements in the view, or only components at specified positions in the view.

Parameter

position UIPosition|UIPosition []

optional

The position or array of positions from which to fetch the components. If not specified, all components will be returned from the View.

Returns

Type	Description
Array<(Widget\|HTMLElement)>	Returns an array of Widgets and/or HTML elements in the View.

Examples

// Display the number of components added to MapView by default.
const view = new MapView({
  map,
  container: "viewDiv",
  zoom: 4,
  center: [-100, 35]
});
await view.when();
const components = view.ui.getComponents();
console.log(`There are ${components.length} components added to MapView.`); // There are 4 components added to MapView.

// Display the label of the first manually placed widget in SceneView.
const view = new SceneView({
  map,
  container: "viewDiv",
  zoom: 4,
  center: [-100, 35]
});
await view.when();
console.log("Widget label is: ${view.ui.getComponents("manual")[0].label}.`); // Widget label is: Attribution.

// Display how many components (i.e. widgets or HTMLElements) are placed in the top-left corner of the View.
const view = new MapView({
  map,
  container: "viewDiv",
  zoom: 4,
  center: [-100, 35]
});
await view.when();
const components = view.ui.getComponents("top-left");
console.log(`There is/are ${components.length} component(s) located in MapView's top-left corner.`);
// There is/are 1 component(s) located in MapView's top-left corner.

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");
}

move Method move(component, position)

Moves one or more UI component(s) to the specified position.

Parameters

Specification

component Widget|HTMLElement|String|Object|Array

The component(s) to move. This value can be a widget instance, HTML element, a string value representing a DOM node ID, or an array containing a combination of any of those types. See the example snippets below for code examples. Alternatively, you can pass an array of objects with the following specification.

Specification

component Widget|HTMLElement|String

The component to move. This can be a widget instance, HTML element, a string value representing a DOM node ID.

position String

optional

The destination position. The component will be placed in the UI container when not provided. If not specified, manual is used by default. Using manual allows you to place the component in a container where you can position it anywhere using css.

index Number

optional

The placement index of the component. This index shows where to place the component relative to other components. For example a value of 0 would place it topmost when position is top-*, leftmost for bottom-left and right most for bottom-right.

position String|Object

optional

The destination position. The component will be placed in the UI container when not provided.

Specification

position String

optional

index Number

optional

Examples

// Moves the BasemapToggle widget from the view if added.
// See the example for add() for more context
view.ui.move(toggle, "bottom-leading");

// Moves the default zoom widget to the bottom left corner of the view's container
view.ui.move("zoom", "bottom-left");

// Moves multiple widgets to the bottom right of the view's UI
view.ui.move([ compass, toggle, "zoom" ], "bottom-right");

// Moves the legend to the topmost position in the top-right corner of the view's UI.
view.ui.move({component: legend, position: "top-right", index: 0});

remove Method remove(component)

Removes one or more HTML component(s) or widgets from the UI.

Parameter

component Widget|HTMLElement|String|Array

The component(s) to remove from the UI. This can be a widget instance, HTML element, a string value representing a DOM node ID, or an array containing a combination of any of those types. See the example snippets below for code examples.

Examples

// Removes the BasemapToggle widget from the view if added.
// See the example for add() for more context
view.ui.remove(toggle);

// Removes the default zoom widget from the view's container
view.ui.remove("zoom");

// Removes multiple widgets from the view's UI
view.ui.remove([ compass, toggle, "zoom" ]);

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");

Type Definitions

UIPosition Type Definition UIPosition String

The UI position of an element in the view.