From: Joel VanderWerf <vjoel@...>
Date: 2008-08-15T12:09:45+09:00
Subject: Re: vector graphics library with pan and zoom

Patrick Doyle wrote:
> Hello,
> I'm not trying to open a debate about which GUI library is the best.
> I would just like a pointer to a graphics library I can use to draw
> some vector graphics (lines, arcs, circles, polygons, possibly filled
> polygons, etc...) which would be presented to a Windows user in a
> window which (s)he could pan and zoom in and out.
> 
> Does anybody know if such a beast exists?
> 
> If not, can anybody point me at the easiest way to get something close to that?
> 
> If not, can anybody point me at the easiest way to get any sort of
> vector graphics drawn in a Windows window?  (This is the part I cringe
> at -- I'm _really_ not trying to ignite a holy war here.)
> 
> Thanks for any pointers...
> 
> --wpd

TkCanvas is very good for that.

You can use it as a library, but what I've found useful recently is to 
isolate the vector drawing and user interaction (select, drag, drop, 
pan, zoom) in a separate process. This permits using it from simulink, 
for example.

http://path.berkeley.edu/~vjoel/vis/tkar/

There's a protocol for talking to tkar, documented in the above.

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