[Matplotlib-users] Figure.draw_artist() bug with Text

[Ben A. <BAx...@co...>]

I am getting a fault when I try to use Figure.draw_artist() with a matplotlib.text.Text object.  Since matplotlib.text.Text inherits from matplotlib.artist.Artist, which is what draw_artist() takes, this should probably work.

Tested with latest SVN code on Linux.

Here is the traceback:

Traceback (most recent call last):
  File "test.py", line 10, in <module>
    fig.draw_artist(textartist)
  File "/usr/local/lib/python2.6/site-packages/matplotlib/figure.py", line 816, in draw_artist
    a.draw(self._cachedRenderer)
  File "/usr/local/lib/python2.6/site-packages/matplotlib/artist.py", line 55, in draw_wrapper
    draw(artist, renderer, *kl)
  File "/usr/local/lib/python2.6/site-packages/matplotlib/text.py", line 549, in draw
    bbox, info = self._get_layout(renderer)
  File "/usr/local/lib/python2.6/site-packages/matplotlib/text.py", line 267, in _get_layout
    key = self.get_prop_tup()
  File "/usr/local/lib/python2.6/site-packages/matplotlib/text.py", line 716, in get_prop_tup
    self.figure.dpi, id(self._renderer),
AttributeError: 'NoneType' object has no attribute 'dpi'

And here is some simple code to trigger the bug:

#!/usr/bin/env python
# display bug in figure.draw_artist(matplotlib.text)
import matplotlib.pyplot as plt
from matplotlib.text import Text

fig = plt.figure()
plt.draw()

textartist = Text(0.5, 0.5, "Foo")
fig.draw_artist(textartist)

plt.show()
#end code

Note that I still get the bug even when i specify figsize and dpi on the figure like so:
fig = plt.figure(figsize=(2,2), dpi=300)

-Ben