public object this[int i]
{
get
{
if (_dummyItem == i)
return null;
var tile = _tileSource.TileFromIndex(i);
var tileId = tile.ToString();
//if (_tileCache.ContainsKey(tileId))
// return new VisualTile(tile, _tileSource, _tileCache[tileId]);
var tileVm = new VisualTile(tile, _tileSource);
var imageSource = _tileSource.GetTileLayers(tile.Level, tile.Column, tile.Row);
var uri = imageSource as Uri;
if (uri != null)
{
// Capture closure
var source = ImageLoader.LoadImage(uri);
if (source != null)
{
source = CacheTile(tileId, source);
tileVm.Source = source;
}
/*var token = _currentCancellationTokenSource.Token;
Task.Factory
.StartNew(() =>
{
var source = ImageLoader.LoadImage(uri);
if (source != null)
source = CacheTile(tileId, source);
return source;
}, token, TaskCreationOptions.None, TaskScheduler.Default)
.ContinueWith(t =>
{
if (t.Result != null)
{
tileVm.Source = t.Result;
}
}, TaskContinuationOptions.OnlyOnRanToCompletion);*/
}
else
{
var stream = imageSource as Stream;
if (stream != null)
{
var source = new BitmapImage();
source.BeginInit();
source.CacheOption = BitmapCacheOption.OnLoad;
source.StreamSource = stream;
source.EndInit();
var src = CacheTile(tileId,(source));
tileVm.Source = src;
}
else return null;
}
return tileVm;
}
set { }
}
public object this[int i]
{
get
{
var tile = _tileSource.TileFromIndex(i);
var tileId = tile.ToString();
if (_tileCache.ContainsKey(tileId))
{
return(new VisualTile(tile, _tileSource, _tileCache[tileId]));
}
var tileVm = new VisualTile(tile, _tileSource);
var imageSource = _tileSource.GetTileLayers(tile.Level, tile.Column, tile.Row);
var uri = imageSource as Uri;
if (uri != null)
{
// Capture closure
var token = _currentCancellationTokenSource.Token;
Task.Factory
.StartNew(() =>
{
var source = ImageLoader.LoadImage(uri);
if (source != null)
{
source = CacheTile(tileId, source);
}
return(source);
}, token, TaskCreationOptions.None, TaskScheduler.Default)
.ContinueWith(t =>
{
if (t.Result != null)
{
tileVm.Source = t.Result;
}
}, TaskContinuationOptions.OnlyOnRanToCompletion);
}
else
{
var stream = imageSource as Stream;
if (stream != null)
{
var source = new BitmapImage();
source.BeginInit();
source.CacheOption = BitmapCacheOption.OnLoad;
source.StreamSource = stream;
source.EndInit();
var src = CacheTile(tileId, source);
tileVm.Source = src;
}
else
{
return(null);
}
}
return(tileVm);
}
set { }
}