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	Wed, 27 Jan 2016 00:27:31 -0800 (PST)
Date:	Wed, 27 Jan 2016 09:27:27 +0100
From:	"Nicklas Karlsson (nicklas DOT karlsson17 AT gmail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
To:	geda-user AT delorie DOT com
Subject:	Re: [geda-user] The nature of gEDA users
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We are heading in the same direction.

> >>> But the first steps should not be "implement b/b vias" or "allow more
> >>> than one pair of outer layers".  It should be something like "expess
> >>> Elements and Vias as subclasses of generic containers that can include
> >>> anything".
> >>
> >> +1
> >
> > So you guys actually want a more strongly typed system.  
> 
> No.
> 
> The Via is a container with Attribute "Via".  An Element is a container
> with Attibute "Element".  The GUI HID shall present those as special
> types to the user, in component libraries and via stack editors. But in
> the data structures those could well the the same as a hierachical
> sublayout.

Sounds perfect. The GUI HID shall present via/element/... as special types to the user but in the data structures those could well the the same as a hierachical sublayout.

>  ...

> > Regarding making arbitrary containers, I'm not convinced its a good
> > idea.  Entire layouts serve much the same purpose and can easily be
> > copied about. 
> 
> I'd like to instanciate the same sublayout by reference, so I can edit
> the master and all copies follow.  Problem: How to override atributes
> (refdes) on the copies?

To instantiate via/pin/pad/element by reference would certainly be good although a local copy is needed so that changes only are made then pressing the update button. As is now I think it would be possible to implement update of elements in pcb without change of file format.


Nicklas Karlsson

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