So for some weird reason my application was not closable from the Mac OS X dock – it quit properly when you selected “Quit” from the application menu or hit the Cmd-Q shortcut – but the dock menu’s quit action was completely ignored.
While debugging the issue I hooked into `QApplication::notify(QObject *, QEvent *)` and noted that a `QCloseEvent` was send to my application… wait, what? A `QCloseEvent`? Yes, I also thought that these kinds of events would only be send to widgets, namely, top level widgets, but I got one for my application, and Qt plainly ignored it. So I went further ahead and tried to quit the application directly when the event occured, similar to this
bool MyApp::event(QEvent * ev)
{
bool eaten = false;
switch (ev->type())
{
// other stuff ...
#ifdef Q_WS_MAC:
case QEvent::Close:
{
quit();
eaten = true;
break;
}
#endif
default:
eaten = QCoreApplication::event(ev);
break;
}
return eaten;
}
but this didn’t work out so nicely: while the application quitted correctly, the `quit()` slot was apparently called twice in a row. My guess is that Qt ignores the `quitOnLastWindowClosed` property – which I’ve set to false – and since I close all windows in the quit slot it executes quit again, or something else, so I decided to just close all open windows when the `QCloseEvent` arrived – without calling `quit()` directly, and tada, my application quitted and the slot was also only called once. (This was a mistake on my side because I missed a break.)
