On Thursday 01 November 2007 13:42:08 Steve Meier wrote:
> I also think that objects in libgeda should know which application
> function to call in order to draw them selves.
>
> 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.
>
> When I say an object should draw itself I mean that the object should
> call the appropriatly registered application function. In my view this
> way if the library changes the application won't get broken.
>
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.
Peter
--
Peter Brett
Electronic Systems Engineer
Integral Informatics Ltd
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