mainwindow does not refresh

[jacek]

You could create also a timer. The timer should fire every second or so, and then check the worker thread. If the thread is done, the time could raise an event or some other means to tell your app that the thread has finished.

You don't need timers --- thread can posts such event when it finishes.

[wysota]

Or even emit a signal.

[jacek]

Or even emit a signal.

In Qt3?

[wysota]

In Qt3?

I was speaking in general terms. QThread in Qt3 doesn't provide a signal for that, but you still can emit one (by sending an event, processing it and emitting a signal from the thread using the custom event handler and a wrapper (like void MyThread::emitFinished(){ emit finished(); })

[jacek]

QThread in Qt3 doesn't provide a signal for that

Because QThread doesn't inherit QObject in Qt3. You would have to use multiple inheritance.

[yop]

Read the docs on QThread, the examples given are enough for your case. You just have to post an event to the main / gui thread to alert it that the operation has finished. The GUI programming with qt3 book also has some very usefull examples.

[wysota]

Because QThread doesn't inherit QObject in Qt3. You would have to use multiple inheritance.

Hmm... true, I didn't notice that.