M. Edward (Ed) Borasky wrote:
...
> What I'd like is a single graphical language that would let me build,
> for example, Petri nets, queuing networks, Mind Maps, dialog maps,
> entity-relationship diagrams, clouds of tags -- about any kind of
> graphical tool you could think of -- and have the elements all be active
> objects/actors, with methods, etc. And, of course, it needs to be open
> source.

IIRC TkCanvas lets you put general Tk widgets on a canvas, connect them
with stretchy lines and arrows, move them about, scroll them, etc.

-- 
      vjoel : Joel VanderWerf : path berkeley edu : 510 665 3407