protected string GetImagePath(TileIndex index)
{
var normalizedIndex = MapTileProvider.NormalizeIndex(index);
string id = GetNameByIndex(normalizedIndex);
string zoomDirPath = GetZoomDir(index.Level);
string imagePath = Path.Combine(zoomDirPath, GetFileName(id));
return(imagePath);
}
public override void BeginLoadImage(TileIndex id)
{
VerifyTileIndex(id);
string uri = CreateRequestUriCore(MapTileProvider.NormalizeIndex(id));
bool useMultipleServers = ServersNum != 0;
if (useMultipleServers)
{
CurrentServer++;
if (CurrentServer >= MinServer + ServersNum)
{
CurrentServer = MinServer;
}
}
if (runningDownloadsNum >= MaxConcurrentDownloads)
{
lock (waitingIDs)
waitingIDs.Push(id);
return;
}
MapsTraceSource.Instance.ServerInformationTraceSource.TraceInformation("\"{0}\" - began to load url=\"{1}\"", GetCustomName(), uri);
WebRequest request = WebRequest.Create(uri);
AdjustRequest(request);
runningDownloadsNum++;
// this is hack to prevent freezing when request.BeginGetResponse was called
// at the 1st time
if (!firstCall)
{
request.BeginGetResponse(ResponseReadyCallback,
new ResponseCallbackInfo {
ID = id, Request = request
});
}
else
{
ThreadPool.QueueUserWorkItem(dummy => {
//Task.Create(o =>
//{
request.BeginGetResponse(ResponseReadyCallback, new ResponseCallbackInfo {
ID = id, Request = request
});
//}).WithExceptionThrowingInDispatcher(Dispatcher);
});
}
}
public TileIndex Normalize()
{
return(MapTileProvider.NormalizeIndex(this));
}