String filename = dlFile.getFilename();
int bytes = 0;
Integer bytesInt = downloadedBytes.get(filename);
if(bytesInt != null)
bytes = bytesInt;
bytes += handler.newByteCount();
downloadedBytes.put(filename, bytes);
// ... and progres bar in main window
int last = 0;
Integer lastInt = lastProgBarUpdate.get(filename);