[Qt-interest] problem using QThread

[Bradley T. Hughes]

Sarvesh Saran wrote:
> Hi,
> 
> I have a main window where one of its widgets launches a QThread. Unfortunately an exit(1) in the thread closes the main window too. I'm not sure why this is happening. It could be because of the way I launch the thread or something else.
> 
> Basically, I am doing the following:
> 
> 
> 1.       (in mainwindow.cpp)
> Mywidget *widget = new Mywidget(this);
> 
> 
> 2.       .....then in MyWidget.cpp
> MyThread *th = new MyThread(this);
> Connect (this,SIGNAL(killall()),th,SLOT(KillThread()));
> th->start();

The KillThread() slot is being called from the GUI thread because the thread 
affinity of MyThread is not to itself[1][2].


[1] "Like other objects, QThread objects live in the thread where the object 
was created -- not in the thread that is created when QThread::run() is 
called."
http://doc.qtsoftware.com/4.5/threads.html#accessing-qobject-subclasses-from-other-threads

[2] See pages 33-43 of 
http://chaos.troll.no/~ahanssen/devdays2007/DevDays2007-Threading.pdf

-- 
Bradley T. Hughes (Nokia-D-Qt/Oslo), bradley.hughes at nokia.com
Sandakervn. 116, P.O. Box 4332 Nydalen, 0402 Oslo, Norway