/// <summary>
/// Place images received from the REST service in the proper place in the active tile cube, and save them to
/// the cache.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
void TileServerRequestCompleted(object sender, DownloadDataCompletedEventArgs e)
{
pendingRequestCount--;
TileInformation requestInformation = (TileInformation)e.UserState;
// Do not handle the event if the request was cancelled
if (requestInformation.IsRequestCancelled)
{
requestInformation.MarkImageRequestCancelled();
if (pendingRequestCount == 0)
{
MoveToNextPhase();
}
return;
}
bool imageAvailable = e.Error == null ? true : false;
// Clean the old image, if any
requestInformation.Dispose(true);
try
{
if (imageAvailable == true)
{
SetTileImage(e, requestInformation);
}
}
catch (Exception)
{
imageAvailable = false;
Console.WriteLine("image not available Error exception");
}
if (imageAvailable == false)
{
Console.WriteLine("image not available bad key?");
requestInformation.Image = unavailableImage;
}
requestInformation.MarkImageRequestCompleted();
// If all asynchronous calls returned, we can move to the next phase
if (pendingRequestCount == 0)
{
MoveToNextPhase();
}
}
/// <summary>
/// Cancels all currently ongoing tile image requests, and disposes of all current tile images.
/// </summary>
private void CancelActiveRequestsAndResetImages()
{
for (int xIndex = 0; xIndex < ActiveTilePlaneSize; xIndex++)
{
for (int yIndex = 0; yIndex < ActiveTilePlaneSize; yIndex++)
{
TileInformation cellInformation = activeTilePlane[xIndex, yIndex];
if (cellInformation != null)
{
cellInformation.Dispose();
}
}
}
}