Re: [wxhaskell-users] wxhaskell 0.7 arrowhead line styles, graph editing and misc questions

[Claus R. <cla...@ta...>]

Hello Arjan,

> >  For instance, how do I get arrowheads at the end of my lines?
> I do not know what this means.

arrow, as in "bow and arrow" - no categories involved;-)
useful to indicate directional links in directed graphs, e.g., 
you use them in your NetEdit screenshot.
 
> I develop the NetEdit tool. It is an editor for probabilistic networks 
> (summary: nodes and arcs and probability tables at each node). You can 
> get the source from me if you want. It is growing larger and larger and 
> does much more than just editing networks, but maybe you can partially 
> evaluate it to your needs :-)

Only if you don't mind me borrowing some ideas/code from it
(such as dealing gracefully with arrows;-). I've got a rudimentary 
graph editor working, but working code for a more complete app 
would help me to find my way into the documentation, not to mention 
saving time on more "advanced" user interface features. So, if 
reuse is ok with you, I'd like to have a look.
 
> It is of course possible to write SOEGraphics on top 
> of wxHaskell. A nice student project I would think...

Yes, but I'm not so much worried about Paul's book. More about
something nice, small and working to give to beginners (as in: download
over a slow modem and get going with fun stuff quickly). The standard
package was Hugs+SOEGraphics, but the latter is -once again- out of 
sync with the Hugs releases.. But if Daan seems to think that wxhaskell
for Hugs wouldn't fall into the "small" category, that's probably not 
the right replacement. There's still the question of the "standard" 
Haskell GUI being available for all Haskell systems (Hugs is still 
popular in academic teaching, I think).

Cheers,
Claus