[Interest] [OS X] maintaining a list of own WIds

[René J. V. Bertin]

John Weeks wrote:

Thanks,

> On OS X with Qt 5, WId's are NSViews. You can get the NSWindow from [NSView

Actually, I'm also seeing QNSWindows (even the occasional QNSPanel). I'm not 
perfectly sure if I've ever seen instances of those because of a WId I received; 
can you be that all WIds are always and exclusively of the (Q)NSView persuasion?

> create an NSView even for non-top-level widgets. We call internalWinId() and
> we're prepared to get back nullptr. internalWinId() is undocumented, but a
> public API used lots of places in Qt code, so it's probably not going anywhere
> soon.

internalWinId() is defined as `inline WId internalWinId() const { return data-
>winid; }` in the QWidget class definition, so I doubt that calling the function 
will have a lot of side-effects if no winid was created yet ;)

Either way, calling a method to obtain the WId from an object that is bound to 
have such a property helps me only if I can do it in a function that is called 
each time such an object is created. That's what I was really asking about: how 
to get notified each time something is created that has a WId.

Alternatively I could work with a notification when a new window (NSWindow) is 
created or one is closed, and then parse the entire list of windows with their 
NSView and sub-NSViews (or their superView and that critter's subviews).

I've tried googling, but until now I've only come up with searches that give way 
too many irrelevant hits.

R.