[Qt-interest] Does QCoreApplication::processEvents() update timers?

[Girish Ramakrishnan]

Karol Krizka wrote:
> Hi all,
> 
> I am using a third party 3D engine to draw a scene in a QGLWidget. The 
> scene is quite big, so it takes a while to load, so I want to show some kind 
> of an animation while it loads. However, the engine is not thread safe, so I 
> cannot do the loading in one thread and drawing in another. What I would like 
> to do instead is to redrew the scene after each major component has been 
> loaded. It will be a bit choppy, but better than nothing.
> 
> I'm trying to accomplish this by having my drawing done inside a timer loop 
> and call QApplication::processEvents(). Basically, I started a timer with 
> QObject::startTimer() inside the QGLWidget and inside it I call updateGL(). 
> I'm hoping that when I call processEvents(), it will call timerEvent() every 
> while in order to trigger the redraw. However that does not happen. The 
> timerEvent() is not called at all during the loading stage.
> 
> So my question is, does QApplication::processEvents() also update any 
> running timers?
> 

Yes, your object will get timerEvent() if you do processEvents(). Maybe
you can show some code with which you are facing this problem?

I also don't understand why you need to call processEvents() yourself.
Why not just start the timer and run the event loop i.e qApp->exec()?

Girish