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Abstract classes Tile, TileSource

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ClemensFischer 2025-11-13 15:32:01 +01:00
parent 20e4fcce75
commit cb8fff0dd1
14 changed files with 95 additions and 98 deletions
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57
MapControl/Shared/TileSource.cs
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@ -21,7 +21,41 @@ namespace MapControl
#else
[System.ComponentModel.TypeConverter(typeof(TileSourceConverter))]
#endif
public class TileSource : ITileSource
public abstract class TileSource
{
/// <summary>
/// Indicates whether tile images from this source should be cached.
/// </summary>
public abstract bool Cacheable { get; }
/// <summary>
/// Gets the image Uri for the specified zoom level and tile indices.
/// </summary>
public abstract Uri GetUri(int zoomLevel, int column, int row);
/// <summary>
/// Loads a tile image whithout caching.
/// </summary>
public abstract Task<ImageSource> LoadImageAsync(int zoomLevel, int column, int row);
/// <summary>
/// Loads a cacheable tile image from an encoded frame buffer.
/// </summary>
public virtual Task<ImageSource> LoadImageAsync(byte[] buffer)
{
return ImageLoader.LoadImageAsync(buffer);
}
/// <summary>
/// Creates a TileSource instance from an Uri template string.
/// </summary>
public static TileSource Parse(string uriTemplate)
{
return new UriTileSource { UriTemplate = uriTemplate };
}
}
public class UriTileSource : TileSource
{
private string uriTemplate;
@ -44,9 +78,9 @@ namespace MapControl
public string[] Subdomains { get; set; }
public bool Cacheable => UriTemplate != null && UriTemplate.StartsWith("http");
public override bool Cacheable => UriTemplate != null && UriTemplate.StartsWith("http");
public virtual Uri GetUri(int zoomLevel, int column, int row)
public override Uri GetUri(int zoomLevel, int column, int row)
{
Uri uri = null;
@ -69,33 +103,20 @@ namespace MapControl
return uri;
}
public virtual Task<ImageSource> LoadImageAsync(int zoomLevel, int column, int row)
public override Task<ImageSource> LoadImageAsync(int zoomLevel, int column, int row)
{
var uri = GetUri(zoomLevel, column, row);
return uri != null ? ImageLoader.LoadImageAsync(uri) : Task.FromResult((ImageSource)null);
}
public virtual Task<ImageSource> LoadImageAsync(byte[] buffer)
{
return ImageLoader.LoadImageAsync(buffer);
}
public override string ToString()
{
return UriTemplate;
}
/// <summary>
/// Creates a TileSource instance from an Uri template string.
/// </summary>
public static TileSource Parse(string uriTemplate)
{
return new TileSource { UriTemplate = uriTemplate };
}
}
public class TmsTileSource : TileSource
public class TmsTileSource : UriTileSource
{
public override Uri GetUri(int zoomLevel, int column, int row)
{