Re: [gtk-list] Re: Callback Argument Marshalling

Kenneth Albanowski <> writes:

> On Thu, 6 Aug 1998 wrote:
> > How does it work with the low-level (GdkEvent) signals? 
> That's the rub: all passed structure pointers (like GdkEvent) will be
> passed as a raw pointer, with type "pointer".  Currently disambiguating
> such types requires manual assistance, in some form or another. 

The Gtk type system is able to differentiate between random pointers
(GTK_TYPE_POINTER) and pointers to specific structures (say GdkEvent,

Uses of GTK_TYPE_POINTER naturally pose problems for programs that
want to dynamically query the types of pointers, like interpreter
bindings.  So using GTK_TYPE_POINTER should be avoided whenever
possible.  I think most of Gtk+ is free of GTK_TYPE_POINTER.

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