English | 简体中文

DataSourceCollection

new Cesium.DataSourceCollection()
engine/Source/DataSources/DataSourceCollection.js 13

A collection of DataSource instances.

Members

readonly dataSourceAdded : Event
engine/Source/DataSources/DataSourceCollection.js 40

An event that is raised when a data source is added to the collection. Event handlers are passed the data source that was added.

readonly dataSourceMoved : Event
engine/Source/DataSources/DataSourceCollection.js 66

An event that is raised when a data source changes position in the collection. Event handlers are passed the data source that was moved, its new index after the move, and its old index prior to the move.

readonly dataSourceRemoved : Event
engine/Source/DataSources/DataSourceCollection.js 53

An event that is raised when a data source is removed from the collection. Event handlers are passed the data source that was removed.

readonly length : number
engine/Source/DataSources/DataSourceCollection.js 27

Gets the number of data sources in this collection.

Methods

add(dataSource) → Promise.<DataSource>
engine/Source/DataSources/DataSourceCollection.js 81

Adds a data source to the collection.
Name Type Description
dataSource DataSource | Promise.<DataSource> A data source or a promise to a data source to add to the collection. When passing a promise, the data source will not actually be added to the collection until the promise resolves successfully.
Returns:
A Promise that resolves once the data source has been added to the collection.

contains(dataSource) → boolean
engine/Source/DataSources/DataSourceCollection.js 153

Checks to see if the collection contains a given data source.
Name Type Description
dataSource DataSource The data source to check for.
Returns:
true if the collection contains the data source, false otherwise.

destroy()
engine/Source/DataSources/DataSourceCollection.js 332

Destroys the resources held by all data sources in this collection. Explicitly destroying this object allows for deterministic release of WebGL resources, instead of relying on the garbage collector. Once this object is destroyed, it should not be used; calling any function other than isDestroyed will result in a DeveloperError exception. Therefore, assign the return value (undefined) to the object as done in the example.
Throws:
  • DeveloperError : This object was destroyed, i.e., destroy() was called.
Example:
dataSourceCollection = dataSourceCollection && dataSourceCollection.destroy();
See:

get(index) → DataSource
engine/Source/DataSources/DataSourceCollection.js 173

Gets a data source by index from the collection.
Name Type Description
index number the index to retrieve.
Returns:
The data source at the specified index.

getByName(name) → Array.<DataSource>
engine/Source/DataSources/DataSourceCollection.js 189

Gets a data source by name from the collection.
Name Type Description
name string The name to retrieve.
Returns:
A list of all data sources matching the provided name.

indexOf(dataSource) → number
engine/Source/DataSources/DataSourceCollection.js 163

Determines the index of a given data source in the collection.
Name Type Description
dataSource DataSource The data source to find the index of.
Returns:
The index of the data source in the collection, or -1 if the data source does not exist in the collection.

isDestroyed() → boolean
engine/Source/DataSources/DataSourceCollection.js 313

Returns true if this object was destroyed; otherwise, false. If this object was destroyed, it should not be used; calling any function other than isDestroyed will result in a DeveloperError exception.
Returns:
true if this object was destroyed; otherwise, false.
See:

lower(dataSource)
engine/Source/DataSources/DataSourceCollection.js 257

Lowers a data source down one position in the collection.
Name Type Description
dataSource DataSource The data source to move.
Throws:

lowerToBottom(dataSource)
engine/Source/DataSources/DataSourceCollection.js 293

Lowers a data source to the bottom of the collection.
Name Type Description
dataSource DataSource The data source to move.
Throws:

raise(dataSource)
engine/Source/DataSources/DataSourceCollection.js 244

Raises a data source up one position in the collection.
Name Type Description
dataSource DataSource The data source to move.
Throws:

raiseToTop(dataSource)
engine/Source/DataSources/DataSourceCollection.js 270

Raises a data source to the top of the collection.
Name Type Description
dataSource DataSource The data source to move.
Throws:

remove(dataSource, destroy) → boolean
engine/Source/DataSources/DataSourceCollection.js 109

Removes a data source from this collection, if present.
Name Type Default Description
dataSource DataSource The data source to remove.
destroy boolean false optional Whether to destroy the data source in addition to removing it.
Returns:
true if the data source was in the collection and was removed, false if the data source was not in the collection.

removeAll(destroy)
engine/Source/DataSources/DataSourceCollection.js 132

Removes all data sources from this collection.
Name Type Default Description
destroy boolean false optional whether to destroy the data sources in addition to removing them.
Need help? The fastest way to get answers is from the community and team on the Cesium Forum.
packages/engine
packages/widgets