[Qt-interest] Bringing back Mac OS drawer QWidget after it's been closed

[Nikos Chantziaras]

How do I bring back a QWidget that uses the Qt::Drawer attribute after 
it's been closed by the user?  How do I even tell that the drawer has 
been closed?

I'm not having any luck with show(), activate() or raise().  With those, 
what I get is a window that looks like a drawer, but isn't (it just 
appears floating at some random place).