[PyX-devel] [ pyx-Bugs-1492588 ] graph.pos method seems broken

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Bugs item #1492588, was opened at 2006-05-21 21:07
Message generated for change (Comment added) made by wobsta
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Category: None
Group: None
>Status: Closed
>Resolution: Invalid
Priority: 5
Submitted By: Dominic Ford (dcf21)
Assigned to: Nobody/Anonymous (nobody)
Summary: graph.pos method seems broken

Initial Comment:
The attached code snippet works fine with PyX 0.7.1,
but fails with PyX 0.8.1:

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Traceback (most recent call last):
  File "pyx_pos.py", line 19, in ?
    x,y = g.pos(x=0,y=0)
  File
"/usr/local/lib/python2.4/site-packages/pyx/graph/graph.py",
line 169, in pos
    return self.xpos + xaxis.convert(x)*self.width,
self.ypos + yaxis.convert(y)*self.height
  File
"/usr/local/lib/python2.4/site-packages/pyx/graph/axis/axis.py",
line 472, in convert
    assert self.canvas is not None, self.errorname
AssertionError: x

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I believe the cause of this is that the syntax of the
method "convert" has changed in the file
graph/axis/axis.py, but the pos method in the file
graph/graph.py has not been updated to reflect this change.

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>Comment By: André Wobst (wobsta)
Date: 2006-05-22 11:46

Message:
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Sorry, that's not a bug but a problem due to the anchored axes as introduced 
in PyX 0.8 internally. You need to access the axes by g.axes["x"] and 
g.axes["y"], since only by that they have access to the graphs internal data 
(like the axes ranges ... you can use the original axis instances multiple times 
now). Adjusted the manual in changeset:2769.

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