+ //! one of system processes finished
+ void processFinished();
+
+ //! user cancel downloading
+ void breakDownloading();
+
+ //! handling a download error
+ void downloadingError(QString);
+
+ /*!
+ function divide two qint64 and result emmit in
+ signals downloadProgress(float)
+ */
+ void updateDownloadProgress(qint64, qint64);
+