Re: Canvas followup (was Re: Predation Model

[Marcus G. Daniels]

>>>>> "PJ" == Paul E Johnson <address@hidden> writes:

PJ> OK. Before I figure that out, tell me this.  I notice that when I
PJ> put some rectangles and 8 or 10 bugs, into that TestCanvas
PJ> program, the model runs somewhat "sluggishly", in the sense that
PJ> the control panel does not respond immediately to mouse clicks and
PJ> the simulation runs a while after the stop button. 

Hmm, I don't get this on a Sun where the host is the same as the X server.
I made about fifty bugs.

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

The Swarm Raster and Canvas aren't compatible.  For speed, raster uses
low-level access to the frame on both Windows and X11, bypassing Tk.


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