[gtkada] Addressing external data in a GUI

[Rick Duley]

Hi folks

I think the penny might just have dropped.

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!

Is this right?
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"Professional qualitative judgement
   consists in knowing the rules
     for using (or occasionally breaking)
       the rules."
                            D. Royce Sadler
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Rick Duley
Murdoch University
School of Engineering Science
Perth, Western Australia
http://eng.murdoch.edu.au/~rick
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