Question

I have a class derived from QThread: class MyClass : public QThread. In the run method I have “my own” message loop:

run() { 
  // exec(); // while not reached    
  while (_runMessageLoop && ...) {
    hr = CallDispatch(.....);
    if (hr== 0) QThread::msleep(100); 
    // QCoreApplication::processEvents(); // Does not work
  }
}

Since exec() is not executed, I have no Qt event loop. This obviously causes signal / slots not to work correctly. Is there any chance to combine the Qt and my own message loop? Or do I need a frequently firing timer in order to do what I have accomplished in my infinite loop?

Answer 1

The right way “Qt-wise” is to use a timer and let Qt manage the event loop.

If you need to depend on external things, you can use things like QAbstractSocket to send events when data comes in over an external socket, eg.