LocalClusterLayer Class

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LocalClusterLayer is responsible for the fetching, caching, and indexing of clusters and associated features. Feature information is fetched on another thread and OnClustersChanged is called when new features are available.

Inheritance Hierarchy

SystemObject
Telogis.GeoBase.ClusteringLocalClusterLayer

Namespace: Telogis.GeoBase.Clustering
Assembly: geobase.net (in geobase.net.dll) Version: 4.99.0.0

Syntax

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public class LocalClusterLayer : IClusterLayer, 
	IDisposable

Public Class LocalClusterLayer
	Implements IClusterLayer, IDisposable

The LocalClusterLayer type exposes the following members.

Constructors

	Name	Description
	LocalClusterLayer	Creates and initializes a local cluster layer for fetching, caching, and indexing clusters.

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Methods

	Name	Description
	BeginGetClusters	Starts calculating clusters asynchronously.
	BeginGetImage	Obtains the image for a cluster asynchronously.
	BeginRefresh	Starts updating the feature data for the clusters asynchronously.
	Dispose	Disposes of this local cluster layer.
	EndGetClusters	Returns the clusters calculated asynchronously by BeginGetClusters(Int32, BoundingBox, AsyncCallback, Object) when the calculation is complete.
	EndGetImage	Returns the image for a cluster made available by a call to BeginGetImage.
	EndRefresh	Executes when a refresh initiated by a call to BeginRefresh(AsyncCallback, Object) completes.
	Equals	Determines whether the specified object is equal to the current object. (Inherited from Object.)
	GetHashCode	Serves as the default hash function. (Inherited from Object.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	ToString	Returns a string that represents the current object. (Inherited from Object.)

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Events

	Name	Description
	OnClustersChanged	Event that is fired when new features are available for the local cluster layer.

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Remarks

LocalClusterLayer is intended to act as a single, global object that persists for the lifetime of your application. It fetches point data automatically, based on the refresh rate of the feature data source. This data is cached to improve performance.Applications that use a cluster layer locally to generate clusters, but that do not keep a reference to the cluster layer once the clusters are first generated should use TransientClusterLayer instead.

All calls to IPointFeatureSource and IPointFeature occur on a separate thread from the thread used to call BeginGetClusters(Int32, BoundingBox, AsyncCallback, Object).

Reference

Telogis.GeoBase.Clustering Namespace