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Added missing implementation of get_window_extent for AxisImage and test (fixes #2980). #3861

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Merged
merged 3 commits into from
Nov 30, 2014
Merged

Added missing implementation of get_window_extent for AxisImage and test (fixes #2980). #3861

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488eb61
Added missing implementation of get_window_extent for AxisImage and t…
maxalbert Nov 29, 2014
0220351
Reduce linewidth for PEP-8 compliance.
maxalbert Nov 29, 2014
87bac9d
Split long line.
maxalbert Nov 30, 2014
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5 changes: 5 additions & 0 deletions lib/matplotlib/image.py
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Original file line number Diff line number Diff line change
Expand Up @@ -574,6 +574,11 @@ def __init__(self, ax,
**kwargs
)

def get_window_extent(self, renderer=None):
x0, x1, y0, y1 = self._extent
bbox = Bbox.from_extents([x0, y0, x1, y1])
return bbox.transformed(self.axes.transData)

def make_image(self, magnification=1.0):
if self._A is None:
raise RuntimeError('You must first set the image'
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22 changes: 22 additions & 0 deletions lib/matplotlib/tests/test_image.py
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Expand Up @@ -335,6 +335,28 @@ def test_bbox_image_inverted():
axes.add_artist(bbox_im)


@cleanup
def test_get_window_extent_for_AxisImage():
# Create a figure of known size (1000x1000 pixels), place an image
# object at a given location and check that get_window_extent()
# returns the correct bounding box values (in pixels).

im = np.array([[0.25, 0.75, 1.0, 0.75], [0.1, 0.65, 0.5, 0.4], \
[0.6, 0.3, 0.0, 0.2], [0.7, 0.9, 0.4, 0.6]])
fig = plt.figure(figsize=(10, 10), dpi=100)
ax = plt.subplot()
ax.set_position([0, 0, 1, 1])
ax.set_xlim(0, 1)
ax.set_ylim(0, 1)
im_obj = ax.imshow(im, extent=[0.4, 0.7, 0.2, 0.9], interpolation='nearest')

fig.canvas.draw()
renderer = fig.canvas.renderer
im_bbox = im_obj.get_window_extent(renderer)

assert_array_equal(im_bbox.get_points(), [[400, 200], [700, 900]])


if __name__=='__main__':
import nose
nose.runmodule(argv=['-s','--with-doctest'], exit=False)