public virtual void DownloadTile(TileInfo tileInfo, AsyncTileRequestCompletedHandler callback)
{
Uri tileUri = GetUri(tileInfo);
HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create(tileUri);
this.tileDownloader.Download(tileInfo, this, callback);
}
public override void Download(TileInfo tileInfo, TileSource tileSource, AsyncTileRequestCompletedHandler callback, NetworkPriority networkPriority)
{
AsyncTileRequest tileRequest;
if (this.tileRequests.TryGetValue(tileSource, out tileRequest))
{
throw new InvalidOperationException("Multiple concurrent downloads of the same tile is not supported.");
}
AsyncTileRequestQueue.Instance.CreateRequest(tileSource.GetUri(tileInfo), tileInfo, networkPriority, callback);
}
public virtual void DownloadTile(TileInfo tileInfo, AsyncTileRequestCompletedHandler callback)
{
Uri tileUri = GetTileUri(tileInfo);
// Attach the events after tile request downloaded.
tileDownloader.TileDownloadCompleted += (sender, e) =>
{
callback(e.TileInfo.Content, null);
};
// Start download the image and attach the content.
tileDownloader.StartDownload(tileUri, tileInfo);
}
public abstract void Download(TileInfo tileInfo, TileSource tileSource, AsyncTileRequestCompletedHandler callback, NetworkPriority networkPriority);
public void Download(TileInfo tileInfo, TileSource tileSource, AsyncTileRequestCompletedHandler callback)
{
Download(tileInfo, tileSource, callback, NetworkPriority.Normal);
}
public AsyncTileRequest(Uri uri, TileInfo tileInfo, AsyncTileRequestCompletedHandler callback)
{
this.uri = uri;
this.callback = callback;
}
public AsyncTileRequest CreateRequest(Uri uri, TileInfo tileInfo, NetworkPriority networkPriority, AsyncTileRequestCompletedHandler callback)
{
AsyncTileRequest tempTileRequest = new AsyncTileRequest(uri, tileInfo, callback)
{
NetworkPriority = networkPriority
};
lock (this.pendingRequests)
{
this.pendingRequests.Add(tempTileRequest);
}
this.thereMayBeWorkToDo.Set();
return(tempTileRequest);
}
