Re: gtkmm2.4 and MSVC (again)

[m h <msh126 yahoo com>]

i'm finding more details (slowly).
the problem is the casting from the Glib::ObjectBase
to the Gtk::Widget (or others).
here's another test that gives the exact same results.

class A : public Gtk::Window {

   A():Gtk::Window(TOPLEVEL){
      Gtk::Window * w1 = this;
      Glib::ObjectBase * obj =
dynamic_cast<Glib::ObjectBase *>(w1);//this line works
fine
      Gtk::Window * w2 = dynamic_cast<Gtk::Window
*>(obj); //this gives the _non_rtti_object exception
   }

   ~A();


};

class B : public A {

   B():A(){}
   int i;//commenting this eliminates the exception
};

if we can figure out why this is happening, it'll fix
the problem.
i tried changing what class A extends (Gtk::Widget,
Gtk::Object, etc) just to see if i can cast back and
forth.  the same results.  (i'm not sure, but i think
when i made class A extend Glib::Object the casting
worked).
i do get warnings in compiling that says Gtk::Window,
Bin, Container, and Widget inherit set_manage() and
destroy_notify_() by dominance.  i'm not sure if this
could be the problem.

any ideas?
thanks for all your help!
--Matt

--- Roger Leigh <rleigh whinlatter ukfsn org> wrote:

> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> Cedric Gustin <cedric gustin swing be> writes:
> 
> > class MyHelloWorld : public HelloWorld
> > {
> > public:
> > 	MyHelloWorld() {}
> 
> Does
>         MyHelloWorld(): HelloWorld() {}
> change anything?
> 
> It might just be you didn't chain up to the base
> class constructor?
> 
> > 	virtual ~MyHelloWorld() {}
> >
> > private:
> > 	int i;  // comment this out and helloworld does
> not crash !
> > };
> 
> 
> - -- 
> Roger Leigh
>                 Printing on GNU/Linux? 
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