/// <summary>
/// Create tile layer for given tile source
/// </summary>
/// <param name="source">Tile source to use for this layer</param>
/// <param name="minTiles">Minimum number of tiles to cache</param>
/// <param name="maxTiles">Maximum number of tiles to cache</param>
/// <param name="maxRetries">Unused</param>
/// <param name="dataFetchStrategy">Strategy to get list of tiles for given extent</param>
/// <param name="renderFetchStrategy"></param>
/// <param name="minExtraTiles">Number of minimum extra tiles for memory cache</param>
/// <param name="maxExtraTiles">Number of maximum extra tiles for memory cache</param>
// ReSharper disable once UnusedParameter.Local // Is public and won't break this now
public TileLayer(ITileSource source = null, int minTiles = 200, int maxTiles = 300,
IDataFetchStrategy dataFetchStrategy = null, IRenderFetchStrategy renderFetchStrategy = null,
int minExtraTiles = -1, int maxExtraTiles = -1, Func <TileInfo, Feature> fetchTileAsFeature = null)
{
MemoryCache = new MemoryCache <Feature>(minTiles, maxTiles);
Style = new VectorStyle {
Outline = { Color = Color.FromArgb(0, 0, 0, 0) }
}; // initialize with transparent outline
_tileSource = source;
if (_tileSource != null)
{
if (Attribution == null)
{
Attribution = new Hyperlink();
}
Attribution.Text = _tileSource.Attribution?.Text;
Attribution.Url = _tileSource.Attribution?.Url;
}
_envelope = _tileSource?.Schema?.Extent.ToBoundingBox();
dataFetchStrategy = dataFetchStrategy ?? new DataFetchStrategy(3);
_renderFetchStrategy = renderFetchStrategy ?? new RenderFetchStrategy();
_minExtraTiles = minExtraTiles;
_maxExtraTiles = maxExtraTiles;
_tileFetchDispatcher = new TileFetchDispatcher(MemoryCache, source.Schema, fetchTileAsFeature ?? ToFeature, dataFetchStrategy);
_tileFetchDispatcher.DataChanged += TileFetchDispatcherOnDataChanged;
_tileFetchDispatcher.PropertyChanged += TileFetchDispatcherOnPropertyChanged;
}
public TileFetchDispatcher(
ITileCache <Feature> tileCache,
ITileSchema tileSchema,
Func <TileInfo, Feature> fetchTileAsFeature,
IDataFetchStrategy dataFetchStrategy = null)
{
_tileCache = tileCache;
_tileSchema = tileSchema;
_fetchTileAsFeature = fetchTileAsFeature;
_dataFetchStrategy = dataFetchStrategy ?? new MinimalDataFetchStrategy();
_fetchMachine = new FetchMachine(this);
}
