[Qt-interest] Asynchronous quitting of Symbian application

[Pritam Ghanghas]

On Tue, 2011-09-27 at 17:16 +0530, Bo Elmgreen wrote:
> Hi all,
> 
> I am developing an application for Symbian and I have come across a 
> problem, where I could use some advice :-)
> 
> My application is divided in two: A (widget-based) UI part and some 
> "middleware" components, that run in their own (Q)Thread, that 
> communicate with some servers over a data connection. The communication 
> between the UI and the middleware is done via signals and slots.
> 
> The problem arises, when it is time to quit the application in a special 
> situation. If the user selects the "Exit" option in the UI, the UI 
> components can dispose of the middleware and exit the application when 
> the middleware has signalled that this has completed. But if the 
> application is closed from the task manager, the application will not 
> know what is happening before either 1) the main window destructor is 
> called or 2) it listens to the aboutToQuit signal. But in both cases it 
> appears as though the application has to quit synchronously, leaving me 
> with the problem that I cannot wait for the middleware to exit properly :-(
> 
> I guess that I am not the only one having this kind of design, so how is 
> this situation "normally" handled?

Look at documentation of QWidget::closeEvent().
handle this event and quit when you are ready.

> 
> Thanks in advance!
> 
> Best Regards,
> Bo
> 
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