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Annotation bbox clipping incorrect for boxstyle='round' Matplotlib >= 1.4.0 #4140
Description
Annotations using a bbox boxstyle of "round" have different (incorrect?) clipping behavior compared to a square boxstyle.
As an example, note that with matplotlib 1.4.0, the connector arrow extends inside the round box, while it is clipped for the square boxstyle. With earlier versions, both have the same clipping behavior.
import matplotlib.pyplot as plt
import matplotlib
def main():
fig, ax = plt.subplots()
ax.set(title='Matplotlib {}'.format(matplotlib.__version__))
annotate(ax, 'Round')
annotate(ax, 'Square')
plt.show()
def annotate(ax, text):
bbox = dict(fc='none')
x, y = 0.1, 0.1
if text == 'Round':
bbox['boxstyle'] = 'round'
y = 0.5
ax.annotate(text, xy=(x, y), xytext=(50, 50), size=20,
xycoords='data', textcoords='offset points',
bbox=bbox, arrowprops=dict(arrowstyle='->'))
main()
The problem persists up to and including the current HEAD, but newer versions also have the issue described in #4139 The two issues don't appear to be directly related.
Activity
tacaswell commentedon Feb 21, 2015
This is related to/duplicate of #4012. There is some subtle 'race' conditions with the fancy bounding boxes + fancy arrows. The root cause of this is the re-factoring of annotation for 1.4 (which I did).
I sunk a day into this leading up to 1.4.3 and did not make much headway.
Annotate: draw text before arrow; closes matplotlib#4140
Annotate: draw text before arrow; closes matplotlib#4140
Annotate: draw text before arrow; closes matplotlib#4140
Annotate: draw text before arrow; closes matplotlib#4140