QThread exec proplem to stop...

[wysota]

Not so sure about that. Signals can be emitted from within the thread to other threads - this works because the are nothing but some events. It is similar to calling QApplication: postEvent( someThread, someEvent ).

I'm talking about using signals within a thread, but this generally applies to using slots across threads as well.

Yes, any event that targets this thread( without an event loop ) is a potential danger to the entire application ( therefore to other threads ).

If a thread doesn't have an event loop, all its objects' events won't ever be processed.