[gtkada] Addressing external data in a GUI

[Emmanuel Briot]

> GtkAda imports C routines.  Therefore: the only way to address data from (say)
> callbacks is to have a public (global in C) access type (pointer in C) to the
> data visible to the callback.  In other words, write Ada code to pull C tricks!

No.
I would recommend that you read the GtkAda User's guide to get to know 
the technology better before asking these questions.

regards,
Emmanuel