gEDA-dev: HID_attribute dependencies

[Dan McMahill <dan@xxxxxxxxxxxx>]

Anyone have any thoughts on the right way to specify any dependencies 
between attributes in an export HID attribute list?  In particular, what 
I'd like to capture is stuff like you have some HID_Boolean and 
depending on if it is true or false, some other attributes are used or 
not used.  In the GUI it would correspond to those others being 
sensitive or not.

My immediate application is I pretty much took the gtk HID attiribute 
editor code from pcb wholesale and added it to gerbv for editing file 
parsing options.  The idea is that each file parser (drill, pick and 
place, rs274-x, etc) can define an HID_Attribute list that controls 
things like inches/metric, zero supression, etc.  The catch is I have an 
"auto" HID_Boolean which if checked basically means "ignore all the rest 
of the user provided values".

So do I add a "sensitive when" field that is a variable?  I could also 
think about providing some functions that let you record dependencies 
although I haven't fully thought out how either of these work without 
having global storage for attribute lists.

Any ideas?

Thanks
-Dan


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