On Sun, 7 Dec 2003, Ingo [iso-8859-1] Klöcker wrote:
> > Why not simply call kapp->ref() from the systemtray (your derived
> > class for now, the base one in kde-4 maybe), and deref in the dtor?
> >
> > Then the user has to close the systray thingie by whichever way,
> > before the process exits.
>
> Hah! I'm glad I'm not the only one that makes this mistake. That's what
> I tried first after I found out about kapp->ref(). But it doesn't work.
> Now, think again and tell me why it won't work. ;-)
>
> Hint: kapp->deref() is called each time a last visible window is closed.
> And you can close a last visible window more than once.

We had similar issues in Kopete, but there we solved it by not closing the
main window at all and instead _hiding_ it.

What also may or may not help is fiddling with WDestructiveClose. IIRC the
deref is used only for destructively closed windows.

-- 
Martijn