signals/slots across threads

[high_flyer]

I am not interested in DirectConnection - that is the whole idea of having the thread for.
I want to post the signals, and let the target thread execute them in its own time.

[wysota]

Hi Dani, nice to hear from you again I hope we can drink a 3EUR worth small bottle of water some time soon

About the problem - as Jacek pointed out the problem of thread affinity causes Qt to misinterpret your intentions. HSCSocket (thread) is created with the GUI thread affinity and you then make a connection to the thread object that is handled by the GUI thread.
There are two solutions:
1. make the connection not to the thread object, but to an object created by the thread's run method
or
2. push the thread object to the thread itself, like so:

connect(m_hpscSocket, SIGNAL(started()), this, SLOT(onStarted()));
m_hpscSocket->start();
//...
void FrmPower::onStarted(){
  m_hpscSocket->moveToThread(m_hpscSocket);
}

connect(m_hpscSocket, SIGNAL(started()), this, SLOT(onStarted()));
m_hpscSocket->start();
//...
void FrmPower::onStarted(){
  m_hpscSocket->moveToThread(m_hpscSocket);
}

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That just might work

Remember you'll lose the parent-child relation between FrmPower object and the thread object.

[high_flyer]

Hi Wysota and Jacek,

Yes, it will be cool to have a 3EU drink again, I wont mind if it will be a trolltech event though
Ok, I think I understand now.
Hmm, I new I need to implement a queue, and I thought that if I use the thread safe signal/slots I will just let the QThread queue do the work, and all I need to do is post signals from my gui thread.
That was what I was trying to do anyhow...
But you are right, my SocketThread class it self lives in the GUI thread.
I guess I will just fall back to custom events then.
I guess that the threaded signals/slots are doing just that behind the scenes, but for me it will be less coding with custom events.

Thanks again for the first class help guys!

[wysota]

If you want a queue, maybe it's better to use postEvent() directly? Signals/slots won't give you any advantage here...

[high_flyer]

Yes, its exactly what I meant when I said custom events.
Thanks.

[wysota]

Yes, I know I just noticed that after sending my post and added the second sentence just to make the post say something anyway