How to manipulate a thread

I need to create a thread such that it can be paused, stoped, and restarted. I already know how to make it restart, but the other cases I still dont know how to do it. I have used wait() for stopping it, and sleep(1) for pausing it; in both cases the GUI frezzes. I would thank if someone could put an example on this matter.

Thanks.

If you want to stop the thread, you just have to make it return from run(). For pausing, take a look at QWaitCondition.