ScaleRangeSliderViewModel | API Reference | ArcGIS Maps SDK for JavaScript 4.32

Provides the logic for the ScaleRangeSlider widget.

See also

Example

const view = new MapView({
  container: "viewDiv",
  map: map
});

const scaleRangeSlider = new ScaleRangeSlider({
  viewModel: {  // autocasts as new ScaleRangeSliderViewModel()
    view: view
  }
}, "scaleRangeSliderDiv");

Constructors

ScaleRangeSliderViewModel Constructor new ScaleRangeSliderViewModel(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
String	The name of the class.	Accessor
Layer\|Sublayer\|null\|undefined	When provided, the initial minScale and maxScale values will match the layer's.	ScaleRangeSliderViewModel
Number	The maximum scale of the active scale range.	ScaleRangeSliderViewModel
Number	The lowest possible maximum scale value from the slider.	ScaleRangeSliderViewModel
Number	The minimum scale of the active scale range.	ScaleRangeSliderViewModel
Number	The highest possible minimum scale value from the slider.	ScaleRangeSliderViewModel
ScaleRanges	The valid scale ranges available based on the slider position.	ScaleRangeSliderViewModel
SliderViewModel	The SliderViewModel for supporting the scale range slider widget.	ScaleRangeSliderViewModel
String	The current state of the widget.	ScaleRangeSliderViewModel
MapView\|SceneView\|null\|undefined	A reference to the MapView or SceneView.	ScaleRangeSliderViewModel

Property Details

declaredClass Inherited Property declaredClass Stringreadonly Inherited from Accessor

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

layer Property layer Layer |Sublayer |null |undefined

When provided, the initial minScale and maxScale values will match the layer's.

When a tiled layer is used, the slider will be restricted from moving the slider thumbs past the lods of the layer's tiling scheme. Since version 4.28, when a MapImageLayer is used, the slider will be restricted from moving past the min/max scale defined on the map service. The unavailable scale range will be designated with a dashed line.

maxScale Property maxScale Number

The maximum scale of the active scale range. When the maxScale reaches the maxScaleLimit, the maxScale value becomes 0 and there is no maximum scale set.

maxScaleLimit Property maxScaleLimit Number

The lowest possible maximum scale value from the slider.

minScale Property minScale Number

The minimum scale of the active scale range. When the minScale reaches the minScaleLimit, the minScale value becomes 0 and there is no minimum scale set.

minScaleLimit Property minScaleLimit Number

The highest possible minimum scale value from the slider.

scaleRanges Property scaleRanges ScaleRangesreadonly

The valid scale ranges available based on the slider position.

sliderViewModel Property sliderViewModel SliderViewModelautocast

The SliderViewModel for supporting the scale range slider widget.

state Property state Stringreadonly

The current state of the widget.

Possible Values:"disabled" |"ready"

Default Value:"disabled"

view Property view MapView |SceneView |null |undefined

A reference to the MapView or SceneView. Set this to link the widget to a specific view.

Method Overview

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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
Number	Utility method for converting scale-to-slider values.	ScaleRangeSliderViewModel
Number	Utility method for converting slider-to-scale values.	ScaleRangeSliderViewModel
	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");
}

mapScaleToSlider Method mapScaleToSlider(scale){Number}

Utility method for converting scale-to-slider values.

Parameter

scale Number

The map scale to be converted.

Returns

Type	Description
Number	The value of the slider.

mapSliderToScale Method mapSliderToScale(value){Number}

Utility method for converting slider-to-scale values.

Parameter

value Number

The value of the slider.

Returns

Type	Description
Number	The map scale that corresponds to the value of the slider.

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");