title: Threads, QRunnable and QThreadPool, I can't fit in the details
body: <p>I know the general theory, Thread, QRunnable and QThreadPool. How does it all fit in ? I mean when an instance of QRunnable is created, and assigned to the ThreadPool, what does it mean to start a thread ? Can multiple threads access the same QRunnable ? Does one QRunnable necessarily map one-to-one with one worker thread ?</p>