Re: [wxlua-users] Getting window class names in wxLuaWinDestroyCallback

[John L. <jla...@gm...>]

On Sun, Aug 25, 2013 at 6:42 AM, Andreas Falkenhahn <an...@fa...>
wrote:
...

>
>
> What is confusing me here is this: The m_window pointer is always the
same but in each
> callback I get a different class name. How can this be? I'd expect to get
"wxFrame"
> in each callback but instead I get "wxFrame" only in the constructor. In
the other
> two callbacks it is "wxWindow" and then even "wxEvtHandler".... I don't
understand
> this. What is going on there?
>

The window is just being cast to different types, It looks like the
GetClassInfo() function is virtual, as defined in wxDECLARE_ABSTRACT_CLASS,
so it returns whatever the object is cast to at that time, which is what
you see. C++ doesn't really know what type any particular object really is.

The first case where the object is passed by wxWindow* pointer to the
wxLuaWinDestroyCallback seems odd, but it's a wxFrame that being passed in
and the wxWindow* arg doesn't really make a new pointer object, it just
passes the frame though it.

Regards,
    John