On 9/21/2010 1:50 PM Chuck Mayers said...
Hello,
I'm having trouble with this small example program:
http://en.literateprograms.org/Bresenham%27s_line_algorithm_%28Python%29
When I run it, I only get a blank grey window. I'm running Python 2.6 under
Windows XP.
If there's a problem with the code, I can't see it... it seems like it
should work. Can anyone else try this and see if it works for them?
If I stick this line in before the loop, it does draw a red line, so I know
my copy of Python/Tkinter is working:
canvas.create_line(10, 100, 5, 50 , fill='red')
Using this form of the line,
canvas.create_line(xstart, ystart, xend, yend, fill="red")
seems to do it, although I can't say what versions allowed the author to
(apparently successfully) write
canvas.draw_line(xstart, ystart, xend, yend, color="blue")
HTH,
Emile
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