Re: forward declarations of gtkmm stuff

On 1/2/08, David L <idht4n gmail com> wrote:
> Sorry if this is a stupid question, but how can I forward declare
> gtkmm things so that gtkmm header files don't need to be
> included before defining a class that has gtkmm pointers?
>
> For example, I'd like to get rid of the two includes in this header file:
> // foo.h
> #include <gtkmm/window.h>
> #include <gtkmm/radioaction.h>

namespace Gtk {
class Window;
class RadioAction;
}

> class foo {
> public:
> foo();
> private:
> Gtk::Window *myWindow;
> Glib::RefPtr<Gtk::RadioAction> myRadioAction;
> };

hope that helps

Thanks! That did fix the Gtk::Window problem... now I get this error:

g++ -Wall -c -g `pkg-config --cflags gtkmm-2.4` -o foo.o foo.cpp
foo.h:13: error: 'Glib' has not been declared
foo.h:13: error: ISO C++ forbids declaration of 'RefPtr' with no type
foo.h:13: error: expected ';' before '<' token
make: *** [foo.o ] Error 1

But it works if I replace the original includes with:
#include <glibmm/refptr.h>

Is this the minimum set of header dependencies since
the compiler needs to know that a RefPtr is a pointer?
That header is 342 lines, which is a bit bigger than I'd
like. Any way to avoid refptr.h inclusion?

Thanks,

David