Hi,
Finding the bbox of a canvas doesn't seem to work.
For example:
c = canvas.canvas()
c.stroke(path.line(0, 0, 1, 1))
c.stroke(path.line(1, 1, 0, 0))
b = pyx.bbox.empty()
for item in c.items:
b1 = item.bbox()
b += b1
print(b)
The final bbox is empty.
Oh! It's not actually empty, but it is still an instance of
the bbox.empty class. Surely this should be a function, not a
class ? Or otherwise bbox.__iadd__ should just call __add__.
thanks,
Simon.
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