SceneLayerView

Class: esri/views/layers/SceneLayerView
Inheritance: SceneLayerView LayerView Accessor
Since: ArcGIS API for JavaScript 4.3

Represents the LayerView of a SceneLayer after it has been added to a Map in a SceneView.

The SceneLayerView is responsible for streaming and rendering a SceneLayer's features in the SceneView. The methods in the SceneLayerView provide developers with the ability to query loaded features. See the code snippets in the methods below for examples of how to access client-side graphics from the view.

Features in a SceneLayer are loaded progressively, starting from coarse representations that are refined to higher levels of detail as necessary for close-up views.

Queries on the SceneLayerView will be executed against features that have been loaded for the current view. This means that only visible features are guaranteed to be available once the layer has finished updating. At lower levels of detail, features may be omitted from rendering by the SceneLayerView, and will therefore not be included in the results of queries. As a result the query methods on the SceneLayerView should not be used when the intention is to query or search within the whole dataset, instead the query methods on the SceneLayer should be used.

To only execute a query once the loading of features has completed, applications can wait until the updating property of the SceneLayerView is false.

See also:

Property Overview

Any properties can be set, retrieved or listened to. See the Working with Properties topic.
NameTypeSummaryClass
String

The name of the class.

more details
more detailsAccessor
Layer

The layer being viewed.

more details
more detailsLayerView
Boolean

Value is true if the layer is suspended (i.e., layer will not redraw or update itself when the extent changes).

more details
more detailsLayerView
Boolean

Value is true when the layer is updating; for example, if it is in the process of fetching data.

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more detailsLayerView
Boolean

When true, the layer is visible in the view.

more details
more detailsLayerView

Property Details

declaredClassStringreadonly inherited

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

layerLayerreadonly inherited

The layer being viewed.

suspendedBooleanreadonly inherited

Value is true if the layer is suspended (i.e., layer will not redraw or update itself when the extent changes).

updatingBooleanreadonly inherited

Value is true when the layer is updating; for example, if it is in the process of fetching data.

Default Value: false

When true, the layer is visible in the view. Set this property to false to hide the layer from the view.

Default Value: true

Method Overview

NameReturn TypeSummaryClass
Promise

An instance of this class is a Promise.

more details
more detailsLayerView
Object

Highlights the given feature(s).

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more detailsSceneLayerView
Boolean

An instance of this class is a Promise.

more details
more detailsLayerView
Boolean

An instance of this class is a Promise.

more details
more detailsLayerView
Boolean

An instance of this class is a Promise.

more details
more detailsLayerView
Promise

An instance of this class is a Promise.

more details
more detailsLayerView
Promise<Object>

Executes a Query against features in the layer view and returns the 3D Extent of features that satisfy the query.

more details
more detailsSceneLayerView
Promise<Number>

Executes a Query against features in the layer view and returns the number of features that satisfy the query.

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more detailsSceneLayerView
Promise<FeatureSet>

Executes a Query against features in the layer view and returns a FeatureSet.

more details
more detailsSceneLayerView
Promise<Number[]>

Executes a Query against features in the layer view and returns an array of the ObjectIDs of features that satisfy the input query.

more details
more detailsSceneLayerView
Promise

An instance of this class is a Promise.

more details
more detailsLayerView

Method Details

always(callbackOrErrback){Promise}inherited

An instance of this class is a Promise. Therefore always() may be used to execute a function if the promise is rejected or resolved. The input function will always execute no matter the response. For more information about promises, see the Working with Promises guide page.

Parameter:
callbackOrErrback Function
optional

The function to execute when the promise is rejected or resolved.

Returns:
TypeDescription
PromiseReturns a new promise for the result of callbackOrErrback.
Example:
// Although this example uses MapView, any class instance that is a promise may use always() in the same way
var view = new MapView();
view.always(function(){
  // This function will always execute whether or not the promise is resolved or rejected
});

highlight(target){Object}

Since: ArcGIS API for JavaScript 4.4

Highlights the given feature(s).

Parameter:
optional

The feature(s) to highlight. When passing a graphic or array of graphics, each feature must have a valid objectID. You may alternatively pass one or more objectIDs as a single number or an array.

Returns:
TypeDescription
ObjectReturns a highlight handler with a remove() method that can be called to remove the highlight.
PropertyTypeDescription
removeFunctionWhen called, removes the highlight of the selected graphics.
See also:
Example:
// highlight features based on a layer query result
// this workflow is valid only if the scene layer has a companion feature layer
var highlight;
view.whenLayerView(sceneLayer).then(function(lyrView){
 var query = sceneLayer.createQuery();
 query.where = "type = 'Quercus'";
 sceneLayer.queryFeatures(query).then(function(result){
   if (highlight) {
     highlight.remove();
   }
   highlight = lyrView.highlight(result.features);
 })
});

// highlight feature on click
view.on("click", function(event){
 view.hitTest(event).then(function(response){
   if (response.results[0]) {
     var graphic = response.results[0].graphic;
     view.whenLayerView(graphic.layer).then(function(lyrView){
       lyrView.highlight(graphic);
     })
   }
 })
});

isFulfilled(){Boolean}inherited

An instance of this class is a Promise. Therefore isFulfilled() may be used to verify if the promise is fulfilled (either resolved or rejected). If it is fulfilled, true will be returned. See the Working with Promises guide page for more information about promises.

Returns:
TypeDescription
BooleanIndicates whether the promise has been fulfilled (either resolved or rejected).

isRejected(){Boolean}inherited

An instance of this class is a Promise. Therefore isRejected() may be used to verify if the promise is rejected. If it is rejected, true will be returned. See the Working with Promises guide page for more information about promises.

Returns:
TypeDescription
BooleanIndicates whether the promise has been rejected.

isResolved(){Boolean}inherited

An instance of this class is a Promise. Therefore isResolved() may be used to verify if the promise is resolved. If it is resolved, true will be returned. See the Working with Promises guide page for more information about promises.

Returns:
TypeDescription
BooleanIndicates whether the promise has been resolved.

otherwise(errback){Promise}inherited

An instance of this class is a Promise. Use otherwise() to call a function once the promise is rejected.

Parameter:
errback Function
optional

The function to execute when the promise fails.

Returns:
TypeDescription
PromiseReturns a new promise for the result of errback.
Example:
// Although this example uses MapView, any class instance that is a promise may use otherwise() in the same way
var view = new MapView();
view.otherwise(function(error){
  // This function will execute if the promise is rejected due to an error
});

queryExtent(params){Promise<Object>}

beta

Executes a Query against features in the layer view and returns the 3D Extent of features that satisfy the query. If query parameters are not provided, the extent and count of all loaded features are returned.

This method is not yet supported when the associated scene layer has a geometryType of point.

To query for the extent of features directly from a Scene Service rather than those loaded for the current view, you must use the SceneLayer.queryExtent() method.

Parameter:
params Query
optional

Specifies the attributes of the query. Only the objectIds property should be specified. Adding any other properties will return an error. If query parameters are not provided, the extent and count of all loaded features are returned.

Returns:
TypeDescription
Promise< Object>When resolved, returns the extent and count of the features that satisfy the input query. See the object specification table below for details.
PropertyTypeDescription
countNumberThe number of features that satisfy the input query.
extentExtentThe extent of the features that satisfy the query.
Example:
var lyr = new SceneLayer({
  url: ssUrl  // points to a Scene Service layer url
});

view.whenLayerView(lyr).then(function(lyrView){
 watchUtils.whenNotOnce(lyrView, "updating") // watches when the layer finishes updating the first time
   .then(function() {
     return lyrView.queryExtent();
   })
   .then(function(results) {
     view.goTo(results.extent); // go to the extent of all the graphics in the layer view
   });
});

queryFeatureCount(params){Promise<Number>}

beta

Executes a Query against features in the layer view and returns the number of features that satisfy the query. If query parameters are not provided, the count of all loaded features is returned.

This method is not yet supported when the associated scene layer has a geometryType of point.

To query for the count of features directly from a Scene Service rather than those loaded for the current view, you must use the SceneLayer.queryFeatureCount() method.

Parameter:
params Query
optional

Specifies the attributes of the query. Only the objectIds property should be specified. Adding any other properties will return an error. If query parameters are not provided, the count of all loaded features is returned.

Returns:
TypeDescription
Promise< Number>When resolved, returns the number of features satisfying the query.
Example:
var lyr = new SceneLayer({
  url: ssUrl  // points to a Scene Service layer url
});

view.whenLayerView(lyr).then(function(lyrView){
 watchUtils.whenNotOnce(lyrView, "updating") // watches when the layer finishes updating the first time
   .then(function() {
     return lyrView.queryFeatureCount();
   })
   .then(function(count) {
     console.log(count); // prints the number of client-side graphics that are currently loaded
   });
});

queryFeatures(params){Promise<FeatureSet>}

beta

Executes a Query against features in the layer view and returns a FeatureSet. If query parameters are not provided, all loaded features are returned.

This method is not yet supported when the associated scene layer has a geometryType of point.

To execute a query against all the features in a Scene Service rather than only those loaded for the current view, you must use the SceneLayer.queryFeatures() method.

Parameter:
params Query
optional

Specifies the attributes of the query. Only the outFields and objectIds properties should be specified. Adding any other properties will return an error. If query parameters are not provided, all loaded features are returned.

Returns:
TypeDescription
Promise< FeatureSet>When resolved, a FeatureSet is returned. The set will be empty if zero results are found.
Examples:
var lyr = new SceneLayer({
  url: ssUrl  // points to a Scene Service layer url
});

// returns loaded features from the layer view that match the query
var query = new Query();
query.objectIds = [10, 125, 126, 200, 201];
query.outFields = ["NAME", "STATE_ABBR", "POP04"];

view.whenLayerView(lyr).then(function(lyrView){
 watchUtils.whenNotOnce(lyrView, "updating")
   .then(function() {
     return lyrView.queryFeatures();
   })
   .then(function(result) {
     console.log(result.features); // prints the client-side graphics to the console
   });
});
var lyr = new SceneLayer({
  url: ssUrl  // points to a Scene Service layer url
});

// returns all loaded features from the layer view
view.whenLayerView(lyr).then(function(lyrView){
  lyrView.watch("updating", function(val){
    if(!val){  // wait for the layer view to finish updating
      lyrView.queryFeatures().then(function(result){
        console.log(result.features);  // prints all loaded client-side graphics to the console
      });
    }
  });
});

queryObjectIds(params){Promise<Number[]>}

beta

Executes a Query against features in the layer view and returns an array of the ObjectIDs of features that satisfy the input query. If query parameters are not provided, the ObjectIDs of all loaded features are returned.

This method is not yet supported when the associated scene layer has a geometryType of point.

To query for ObjectIDs of features directly from a Scene Service rather than those loaded for the current view, you must use the SceneLayer.queryObjectIds() method.

Parameter:
params Query
optional

Specifies the attributes of the query. Only the objectIds property should be specified. Adding any other properties will return an error. If query parameters are not provided, the ObjectIDs of all loaded features are returned.

Returns:
TypeDescription
Promise< Number[]>When resolved, returns an array of numbers representing the ObjectIDs of the features satisfying the query.
Example:
var lyr = new SceneLayer({
  url: ssUrl  // points to a Scene Service layer url
});

// returns all the Ids from the features in the layer view
view.whenLayerView(lyr).then(function(lyrView){
  return lyrView.queryObjectIds();
}).then(function(ids){
  console.log(ids);  // prints the ids of all the client-side graphics to the console
});

then(callback, errback, progback){Promise}inherited

An instance of this class is a Promise. Therefore then() 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 promise resolves (when the instance of the class loads). The errback executes if the promise fails. See the Working with Promises guide page for additional details.

Parameters:
callback Function
optional

The function to call when the promise resolves.

errback Function
optional

The function to execute when the promise fails.

progback Function
optional

The function to invoke when the promise emits a progress update.

Returns:
TypeDescription
PromiseReturns a new promise for the result of callback that may be used to chain additional functions.
Example:
// Although this example uses MapView, any class instance that is a promise may use then() in the same way
var view = new MapView();
view.then(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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