Canvas followup (was Re: Predation Model

[Paul E Johnson]

"Marcus G. Daniels" wrote:

> I exported the OvalNodeItem and RectangleNodeItem, which size per
> the text in them.  A person would need to export Circle in order to do that,
> or maybe even add new code to tkobjc.

OK. Before I figure that out, tell me this.  I notice that when I put
some rectangles and 8 or 10 bugs, into that TestCanvas program, the
model runs somewhat "sluggishly", in the sense that the control panel
does not respond immediately to mouse clicks and the simulation runs a
while after the stop button. This makes me suspect that the canvas will
be too slow to draw dots for a few hundred objects, so there's not much
use in trying.  Am I just having a bad morning?

It seems like the ideal case would be a raster full of pixels that can
have a "clear" canvas on top of it, so I could write the raster part in
the background and have canvas action overlaid on a separate plane.  If
I did learn Tk, would I be able to do something like that?

-- 
Paul E. Johnson                       email: address@hidden
Dept. of Political Science            http://lark.cc.ukans.edu/~pauljohn
University of Kansas                  Office: (785) 864-9086
Lawrence, Kansas 66045                FAX: (785) 864-5700

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