ANNOUNCE - graphics package
Mon Jan 19 15:13:31 CET 2004
On Mon, Jan 19, 2004 at 02:24:39PM +0100, Luke Gorrie wrote:
> Joe Armstrong <> writes:
> > It turns out that with 20 odd protocol messages one can do *most* of
> > the fun things that are possible with X. The entire design of
> > virtually all widget sets (motif, GTK etc) seems to be predicated by
> > the desire to simulate concurrency with callbacks. In ex11 I do
> > *exactly the opposite* and expose the concurrency to the applications.
> Is it really concurrency they are simulating?
> I think what they're simulating is object-oriented programming. The
> callbacks are there to poke in behaviour so that e.g. "Ok" and
> "Cancel" buttons do different things.
This may not be completely to the point, but however: In OO languages,
UIs are often modelled as one object per widget. This is imo a
natural thing to do. But although OO literature (at least that
introducing OO) often speaks of method invocation as message passing,
all of these `messages' are synchronous. One process per widget may
be similar to one object per widget, but advantageous if processes are
A functional language with lightweight processes (like Haskell, oh
wrong list ;-) may more OO than OO languages, but that is a discussion
we do not want to start ;-) And actually, I am not at all
knowledgeable enough to make such a claim.
Carsten Schultz (2:38, 33:47), FB Mathematik, FU Berlin
PGP/GPG key on the pgp.net key servers,
fingerprint on my home page.
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