CSVLayerView

Class: esri/views/layers/CSVLayerView
Inheritance: CSVLayerView LayerView Accessor
Since: ArcGIS API for JavaScript 4.4

Represents the LayerView of a CSVLayer after it has been added to a Map in either a MapView or SceneView. The CSVLayerView is responsible for rendering a CSVLayer's features as graphics in the View.

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.

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more detailsLayerView
Boolean

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

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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.

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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.

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more detailsLayerView
Object

Highlights the given feature(s).

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more detailsCSVLayerView
Boolean

An instance of this class is a Promise.

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more detailsLayerView
Boolean

An instance of this class is a Promise.

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more detailsLayerView
Boolean

An instance of this class is a Promise.

more details
more detailsLayerView
Promise

An instance of this class is a Promise.

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more detailsLayerView
Promise<Object>

Executes a Query against features available for drawing in the layer view and returns the Extent of features that satisfy the query.

more details
more detailsCSVLayerView
Promise<Number>

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

more details
more detailsCSVLayerView
Promise<Graphic[]>

Executes a Query against features available for drawing in the layer view and returns an array of Graphic[].

more details
more detailsCSVLayerView
Promise<Number[]>

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

more details
more detailsCSVLayerView
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}

Highlights the given feature(s).

Known Limitations

Currently the highlight method is only supported in a SceneView.

Parameter:
optional

The feature(s) to highlight.

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 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>}

Executes a Query against features available for drawing in the layer view and returns the Extent of features that satisfy the query.

Parameter:
params Query
optional

Specifies the attributes and spatial filter of the query. Only the geometry, objectIds, and spatialRelationship properties should be specified. Adding any other properties will return an error. If specifying a spatialRelationship, note that intersects is the only supported operation. If query parameters are not provided, the extent and count of all features available for drawing 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 CSVLayer({
  url: csvUrl  // URL to a csv file
});

view.whenLayerView(lyr).then(function(lyrView){
  lyrView.watch("updating", function(val){
    if(!val){  // wait for the layer view to finish updating
      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>}

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

Parameter:
params Query
optional

Specifies the attributes and spatial filter of the query. Only the geometry, objectIds, and spatialRelationship properties should be specified. Adding any other properties will return an error. If specifying a spatialRelationship, note that intersects is the only supported operation. If query parameters are not provided, the count of all features available for drawing is returned.

Returns:
TypeDescription
Promise< Number>When resolved, returns the number of features satisfying the query.
Examples:
view.on("click", function(event){

  var query = new Query();
  query.geometry = event.mapPoint;  // obtained from a view click event
  query.spatialRelationship = "intersects";

  view.whenLayerView(lyr).then(function(lyrView){
    watchUtils.whenNotOnce(lyrView, "updating")
    .then(function(){
      return lyrView.queryFeatureCount(query);
    })
    .then(function(count){
      console.log(count);  // prints the number of the client-side graphics that satisfy the query
    });
  });
});
view.whenLayerView(lyr).then(function(lyrView){
  return lyrView.queryFeatureCount()
}).then(function(count){
  console.log(count);  // prints the total number of client-side graphics to the console
});

queryFeatures(params){Promise<Graphic[]>}

Executes a Query against features available for drawing in the layer view and returns an array of Graphic[]. If query parameters are not provided, all features available for drawing are returned.

Parameter:
params Query
optional

Specifies the attributes and spatial filter of the query. Only the geometry, objectIds, and spatialRelationship properties should be specified. Adding any other properties will return an error. If specifying a spatialRelationship, note that intersects is the only supported operation. If specifying a geometry parameter, note that extent is the only supported geometry. If query parameters are not provided, all features available for drawing are returned.

Returns:
TypeDescription
Promise< Graphic[]>When resolved, an array of Graphic[] is returned. This array will not be populated if zero results are found.
Examples:
view.whenLayerView(layer).then(function(lyrView){
  lyrView.watch("updating", function(val){
    if(!val){  // wait for the layer view to finish updating
      lyrView.queryFeatures(query).then(function(results){
        console.log(results);  // prints the array of client-side graphics to the console
      });
    }
  });
});
// returns all the graphics from the layer view
view.whenLayerView(layer).then(function(lyrView){
  lyrView.watch("updating", function(val){
    if(!val){  // wait for the layer view to finish updating
      lyrView.queryFeatures().then(function(results){
        console.log(results);  // prints all the client-side graphics to the console
      });
    }
  });
});

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

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

Parameter:
params Query
optional

Specifies the attributes and spatial filter of the query. Only the geometry, objectIds, and spatialRelationship properties should be specified. Adding any other properties will return an error. If specifying a spatialRelationship, note that intersects is the only supported operation. If query parameters are not provided, the ObjectIDs of all features available for drawing are returned.

Returns:
TypeDescription
Promise< Number[]>When resolved, returns an array of numbers representing the ObjectIDs of the features satisfying the query.
Examples:
view.on("click", function(event){

  var query = new Query();
  query.geometry = event.mapPoint;  // obtained from a view click event
  query.spatialRelationship = "intersects";

  view.whenLayerView(lyr).then(function(lyrView){
    watchUtils.whenNotOnce(lyrView, "updating")
    .then(function(){
      return lyrView.queryObjectIds(query);
    })
    .then(function(ids){
      console.log(ids);  // prints the ids of the client-side graphics to the console
    });
  });
});
// returns all the Ids from the graphics 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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