[SailfishDevel] Closing an application without killing the main loop

[Lucien XU]

Hello,

I don't know what's the best way to do it, but here are some ideas.

1. Use aboutToQuit and block it with a QEventLoop ? It might not be enough and 
   might leave the application cover open on the multitask grid, making it 
   look not responding.
2. Launch a script / program when quitting, that performs the async task.

Cheers,
Lucien

Le mercredi 11 décembre 2013 22:51:48 Ville Ranki a écrit :
> Hello,
> 
> I'm the author of Siilihai web forum reader <http://siilihai.com> and
> i'm currently porting it to Sailfish.
> 
> Siilihai needs to synchronize it's status (read messages etc) to a
> remote server when user quits it.
> 
> I have not found a way to do it in Sailfish. When user closes the
> application, Sailfish terminates the Qt main loop which effectively
> makes it impossible to do any asynchronous tasks.
> 
> On desktop QApplication::setQuitOnLastWindowClosed(false) can be
> used to instruct Qt to continue running main loop when last
> window is closed, but it does not work on Sailfish.
> 
> Restarting the main loop worked on Harmattan, but on Sailfish
> it causes a crash inside Qt-Wayland code (qwaylandeventthread.cpp line
> 37). I also tried to create a Qt event filter with no success.
> 
> 
> Here is a example application to demonstrate the issue:
> 
http://talk.maemo.org/attachment.php?attachmentid=33970&d=1386249527
> 
> This application creates a repeating timer which stops working
> when the window is closed.
> 
> I have already asked about the issue on TMO and #sailfishos, but didn't
> get any satisfactory answers.
> 
> http://talk.maemo.org/showthread.php?t=91947
> 
> The question is: is this a bug or intended behavior? Can anyone hack
> the example application so that the timer keeps running after the window
> is closed?
> 
> --
> Ville Ranki <ville.ranki at iki.fi>
> http://www.iki.fi/~cos
> PGP public key: http://www.iki.fi/~cos/vranki_pub.asc
> _______________________________________________
> SailfishOS.org Devel mailing list
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