[Interest] Triggering Actions on Application Close

[Charles Yin]

see also :
http://stackoverflow.com/questions/3360761/how-to-do-a-cleanup-after-sigkill


2013/7/9 Gopalakrishna Bhat <gopalakbhat at gmail.com>

>
>
>
> On Tue, Jul 9, 2013 at 9:33 AM, andy fillebrown <andy.fillebrown at gmail.com
> > wrote:
>
>> I think the problem might be the use of the "Force quit" button.  That is
>> not a normal way to close an application.  Pressing the "Force quit" button
>> is similar to using the OS to kill the process. I'd be surprised if any
>> slots were called in that case.  Try closing the application like a normal
>> user would.
>>
>> Cheers,
>> ~ andy.f
>>
>>
>>
>>
>>
>> On Mon, Jul 8, 2013 at 9:11 PM, Syam Krishnan <syamcr at gmail.com> wrote:
>>
>>> On 07/09/2013 04:03 AM, Mitchell Verter wrote:
>>> > How do I trigger cleanup actions on application close?
>>> >
>>> > I need to write out temporary objects and a footer to a file whenever
>>> > the Application is closed.
>>> >
>>> > I've tried several approaches, but none of them produces any result
>>> > when I "Force Quit" by hitting the red button within QtCreator.
>>>
>>
> As others have pointed out, forcing an application to quit is killing the
> process immediately. All the events in the event queue will discarded.
> Hence none of your event handlers will be called.
>
> Try doing normal application termination like pressing the Close button on
> the window etc.
>
>>  >
>>> > More specifically, I have tried to connect:
>>> >
>>> >      QObject::connect(&myApplication, SIGNAL(aboutToQuit()),
>>> > &myMainWindow,  SLOT(closeFileSlot()));
>>> >
>>> > (note that I am using a QApplication rather than a QCoreApplication --
>>> > I'm not sure if it makes a difference)
>>>
>>>
>>> You could try the signal QApplication::lastWindowClosed() or override
>>> the closeEvent() function of your QMainWindow class.
>>>
>>> regards,
>>>
>>> Syam
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>>
>>
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>
>
> --
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>
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-- 
--
Yunqiao (Charles) Yin
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