[Qt-interest] QThread event loop running in main thread?

[Thiago Macieira]

On Monday, 27 de December de 2010 04:05:02 lbutler3 at comcast.net wrote:
> I seem to be having trouble with a QThread and signals/slots. 

When I read the first sentence, I thought "he's using slots in a class derived 
from QThread". So reading a bit below, we see:

> In my main window constructor I do: 
> 
> connect(this, SIGNAL(tweakThread()), &myThread, SLOT(tweak()),
> Qt::QueuedConnection); 

Simply don't do that. DO NOT put slots in a class derived from QThread and 
you'll save yourself a lot of headaches. You can add signals, but you 
shouldn't.

Instead, create a new QObject with the signals and slots and make sure it's 
moved to or created in the other thread.

Think of QThread as "the resource managing a thread", not the work to be done. 
So "tweak" means tweaking the thread, whatever that should mean (as in "kill 
the thread", "start the thread", "set the thread's priority").

-- 
Thiago Macieira - thiago (AT) macieira.info - thiago (AT) kde.org
  Senior Product Manager - Nokia, Qt Development Frameworks
      PGP/GPG: 0x6EF45358; fingerprint:
      E067 918B B660 DBD1 105C  966C 33F5 F005 6EF4 5358
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