Re: Subclasses

Carlos Agon <[email protected]> writes:

> hi Espen
> 
> thanks for your work it is great and very useful for us
> 
> we are porting our software OpenMusic on LInux. OpenMusic is a visual
> interface of CLOS including special classes and methods for music
> composition. It runs on Mac and windows but many people ask us for a
> Linux version. OpenMusic sources are available under the GNU Public
> License (GPL), porting it on Linux will allow us to make a true free
> version. You can see more details about OpenMusic at:
> 
> http://recherche.ircam.fr/equipes/repmus/OpenMusic/

It sounds like an interesting project. I am looking forward to give it 
a try.

> To start we need to find a class equivalent to the class view in MCL,
> it is, a container allowing to include other containers at any
> position and of any size. We need also to draw into these containers.
> At the moment I have not found a class equivalent, do you know  such
> a class ? or may be we need to use different classes i.e. layout +
> drawing-area. Can you give us an advice please ?

I think using some kind of canvas widget would give the easiest and most
flexible solution (isn't this what the existing clg port of OM is
using?), but unfortunately such a widget is not yet included in the Gtk
library. Of the may canvas widget that exists for Gtk, I believe
goocanvas¹ would be the best candidate as it uses Cairo for rendering.
Creating Lisp bindings for it should be quite straight forward.

But anyway you should also ask this question on the gtk-app-devel-list
as it is more like a general Gtk question, and you would probably get a
much more deceive answer.


¹http://www.dachaplin.dsl.pipex.com/goocanvas/
-- 
Espen


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