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indicate_inset_zoom sometimes draws incorrect connector lines #12323

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@dstraus

Description

@dstraus

Bug report

Bug summary

Depending on location of inset, the connector lines are not drawn to the nearest two corners.

Code for reproduction

import matplotlib.pyplot as plt
import numpy as np
line=np.linspace(10,0, 101)
fig, ax=plt.subplots()
ax.plot(line, line)
axins=ax.inset_axes([0, .5, .4, .4])
axins.plot(line, line)
axins.set_xlim(7,8)
axins.set_ylim(7,8)
ax.indicate_inset_zoom(axins)

Actual outcome

image

Expected outcome

import matplotlib.pyplot as plt
import numpy as np
line=np.linspace(10,0, 101)
fig, ax=plt.subplots()
ax.plot(line, line)
axins=ax.inset_axes([0, .5, .4, .4])
axins.plot(line, line)
axins.set_xlim(7,8)
axins.set_ylim(7,8)
rectpatch, connects=ax.indicate_inset_zoom(axins)
connects[0].set_visible(False)
connects[1].set_visible(False)
connects[2].set_visible(True)
connects[3].set_visible(True)

image

Matplotlib version

  • Operating system: Windows 10 1803
  • Matplotlib version: 3.0.0
  • Matplotlib backend (print(matplotlib.get_backend())): module://ipykernel.pylab.backend_inline
  • Python version: Python 3.6.5 (Anaconda Python)
  • Jupyter version (if applicable): 6.4.0
  • Other libraries:

Installed matplotlib 3.0.0 from conda-forge

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