Class TileFetchPlanner

Inheritance
object
TileFetchPlanner
Implements
Inherited Members
Namespace: Mapsui.Tiling.Fetcher
Assembly: Mapsui.Tiling.dll
Syntax
public class TileFetchPlanner : INotifyPropertyChanged, IFetchableSource

Constructors

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TileFetchPlanner(ITileCache<IFeature?>, ITileSchema, Func<TileInfo, Task<IFeature?>>, IDataFetchStrategy, ILayer)

Declaration
public TileFetchPlanner(ITileCache<IFeature?> tileCache, ITileSchema tileSchema, Func<TileInfo, Task<IFeature?>> fetchTileAsFeature, IDataFetchStrategy dataFetchStrategy, ILayer layer)
Parameters
Type Name Description
ITileCache<IFeature> tileCache
ITileSchema tileSchema
Func<TileInfo, Task<IFeature>> fetchTileAsFeature
IDataFetchStrategy dataFetchStrategy
ILayer layer

Properties

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Busy

Declaration
public bool Busy { get; }
Property Value
Type Description
bool
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DefaultNumberOfSimultaneousFetches

Declaration
public static int DefaultNumberOfSimultaneousFetches { get; set; }
Property Value
Type Description
int
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Id

The layer identifier.

Declaration
public int Id { get; }
Property Value
Type Description
int
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NumberTilesNeeded

Declaration
public int NumberTilesNeeded { get; }
Property Value
Type Description
int

Methods

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ClearCache()

Clears the cache of this layer. Call this if source data has was invalidated or the layer is removed.

Declaration
public void ClearCache()
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GetFetchJobs(int, int)

Gets the fetch requests for this layer. The requests are based on the viewport stored within the layer.

Declaration
public FetchJob[] GetFetchJobs(int activeFetches, int availableFetchSlots)
Parameters
Type Name Description
int activeFetches
int availableFetchSlots

Number of available fetch slots in the caller. It is the maximum number of fetch jobs the method should return.
Returns
Type Description
FetchJob[]
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ViewportChanged(FetchInfo)

Informs the layer that the viewport has changed and it should update its data accordingly.

Declaration
public void ViewportChanged(FetchInfo fetchInfo)
Parameters
Type Name Description
FetchInfo fetchInfo

Events

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DataChanged

Declaration
public event EventHandler<Exception?>? DataChanged
Event Type
Type Description
EventHandler<Exception>
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FetchRequested

Indicates to the listener that it should fetch data again. This event is raised when there was a change in source data, so only relevant for dynamic data. The fetches triggered by viewport changes do not depend on it.

Declaration
public event EventHandler<FetchRequestedEventArgs>? FetchRequested
Event Type
Type Description
EventHandler<FetchRequestedEventArgs>
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PropertyChanged

Occurs when a property value changes.

Declaration
public event PropertyChangedEventHandler? PropertyChanged
Event Type
Type Description
PropertyChangedEventHandler

Implements

Extension Methods