[Interest] Triggering Actions on Application Close

[Mandeep Sandhu]

Here's a good article on how to handle unix signals the Qt way (i.e via
it's event loop):

http://qt-project.org/doc/qt-4.8/unix-signals.html

HTH,
-mandeep



On Wed, Jul 10, 2013 at 5:53 PM, franki <franki at franki.eu.org> wrote:

> Dnia wtorek, 9 lipca 2013 o 00:33:44 Mitchell Verter napisał(a):
> > 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.
> >
> > 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)
> >
> > and also
> >
> > connect(&myMainWindow, SIGNAL(destroy()), &myMainWindow,
> > SLOT(closeFileSlot()));
> >
> > Neither of these approaches seems to successfully trigger the
> > closeFileSlot() Any suggestions about what the right technique might be?
>
> Hi
>
> If you are doing this on Linux, I've made it like this:
>
> in header:
>
> #include <signal.h>
> .......
> public slots:
>      void terminate(bool fromSignal);
> .....
> };
> extern "C" void terminate_wrapper(int dummy);
>
> in cpp file:
> in main class constructor:
>
> GlobalVariable= (void*)this;
> signal(SIGTERM,terminate_wrapper);
> ........
>
>
> void MainClass::terminate(bool fromSignal) {
>     qDebug()<<"MainClass::terminate";
>     ... close my services....
>     qApp->quit();
> }
>
> void terminate_wrapper(int dummy) {
>     MainClass *myApp=(MainClass*)GlobalVariable;
>     myApp->terminate(true);
> }
>
> So every time I hit red button in QtCreator it sends SIGTERM to
> application,
> my wrapper catches it and I can do clean up.
>
> regards
> Marek
>
>
> >
> > Thanks
> > Mitchell
> > _______________________________________________
> > Interest mailing list
> > Interest at qt-project.org
> > http://lists.qt-project.org/mailman/listinfo/interest
> _______________________________________________
> Interest mailing list
> Interest at qt-project.org
> http://lists.qt-project.org/mailman/listinfo/interest
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.qt-project.org/pipermail/interest/attachments/20130710/83a0ca39/attachment.html>