RE: [Java-gnome-developer] CVS: Problem with gdk_BaseObject.c and GTK_IS_OBJECT()

[Santeri P. <sa...@ik...>]

On Tue, 9 Oct 2001, Jeffrey Morgan wrote:
> I have struggled with this issue for some time and as yet haven't
> found a solution.  I need to determine if a void pointer is actually
> pointing to a GTK type.  All macros and methods in GTK assume this is
> the case (like the GTK_IS_OBJECT macro below).  Does anybody have a
> suggestion?

Of course there is no generic way to test that -- we could put all GTK
objects into a hashtable and check them from there.. but that's not really
an option.

However, the caller to makeBaseObjectSubclass routine always knows the
type of the 'peer' argument, eg. whether it is a GTK or non-GTK object.
Thus, we could remove the GTK_IS_OBJECT test from makeBaseObjectSubclass,
add a new routine makeGtkBaseObjectSubclass, which would have the
GTK_IS_OBJECT test, and modify the code generator to use the GTK routine
version when it knows that the underlying object (for which it is being
called) is a GTK (or Gnome) object, and not some other (glib, gdk).

--
sa...@ik...                    I have become death, destroyer of the worlds.