gEDA-dev: o_redraw_single() has moved to gschem

[Bernd Jendrissek]

On 11/1/07, Peter TB Brett <peter at peter-b.co.uk> wrote:
> On Thursday 01 November 2007 13:42:08 Steve Meier wrote:
> > This allows the application to ask the page to draw itself and the page
> > to ask the complex components, segments, arcs, boxes, text etc to draw
> > themselves. Instead of the application having to go through the page and
> > get each item and then do the drawing.
>
> On the other hand, I *don't* like this, because it violates the
> Model-View-Controller pattern.  I would like it to be possible to have
> multiple View implementations which can simultaneously use the same Model.
>
> In my world, each renderer should keep its own look-up table mapping drawable
> types to rendering functions.

I have to agree with you here Peter, MVC rocks.  How, though, do you
think gschem should deal with COMPLEX or TEXT objects, with the
prim_objs inside?  The respective renderers for these would have to
know about the substructure and delegate the real work to the
renderers for each of these sub-objects.

Would it make sense to be able to attach observers to the sub-objects
inside a COMPLEX or a TEXT?

Actually I think TEXT are a bit grotty here.  It should be gschem, not
libgeda, that does the character->glyph font mapping.  It isn't like
PCB where the text gets rendered onto an electrically significant
medium.