ClemensFischer/XAML-Map-Control
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Added WorldMercatorProjection, fixed bounding box problems when changing projection.

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This commit is contained in:
ClemensF 2017-10-27 17:15:18 +02:00
parent 2f123886ff
commit 156ebfe177
21 changed files with 586 additions and 469 deletions
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51
MapControl/WPF/TileImageLoader.WPF.cs
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@ -42,7 +42,19 @@ namespace MapControl
if (buffer == null || expiration < DateTime.UtcNow)
{
loaded = await DownloadTileImageAsync(tile, uri, cacheKey);
try
{
loaded = await ImageLoader.LoadHttpTileImageAsync(uri, async (stream, maxAge) =>
{
await SetTileImageAsync(tile, stream); // create BitmapFrame before caching
SetCachedImage(cacheKey, stream, GetExpiration(maxAge));
});
}
catch (Exception ex)
{
Debug.WriteLine("TileImageLoader: {0}: {1}", uri, ex.Message);
}
}
if (!loaded && buffer != null) // keep expired image if download failed
@ -54,43 +66,6 @@ namespace MapControl
}
}
private async Task<bool> DownloadTileImageAsync(Tile tile, Uri uri, string cacheKey)
{
var success = false;
try
{
using (var response = await TileSource.HttpClient.GetAsync(uri))
{
success = response.IsSuccessStatusCode;
if (!success)
{
Debug.WriteLine("TileImageLoader: {0}: {1} {2}", uri, (int)response.StatusCode, response.ReasonPhrase);
}
else if (TileSource.TileAvailable(response.Headers))
{
using (var stream = new MemoryStream())
{
await response.Content.CopyToAsync(stream);
stream.Seek(0, SeekOrigin.Begin);
await SetTileImageAsync(tile, stream); // create BitmapFrame before caching
SetCachedImage(cacheKey, stream, GetExpiration(response));
}
}
}
}
catch (Exception ex)
{
Debug.WriteLine("TileImageLoader: {0}: {1}", uri, ex.Message);
}
return success;
}
private async Task SetTileImageAsync(Tile tile, MemoryStream stream)
{
var imageSource = BitmapFrame.Create(stream, BitmapCreateOptions.None, BitmapCacheOption.OnLoad);