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Backport PR #21076 on branch v3.5.x (Break links between twinned axes when removing) #21077

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Merged
merged 1 commit into from
Sep 14, 2021
Merged

Backport PR #21076 on branch v3.5.x (Break links between twinned axes when removing) #21077

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4 changes: 4 additions & 0 deletions lib/matplotlib/figure.py
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Original file line number Diff line number Diff line change
Expand Up @@ -928,11 +928,15 @@ def _break_share_link(ax, grouper):
self.stale = True
self._localaxes.remove(ax)

# Break link between any shared axes
for name in ax._axis_names:
last_ax = _break_share_link(ax, ax._shared_axes[name])
if last_ax is not None:
_reset_locators_and_formatters(getattr(last_ax, f"{name}axis"))

# Break link between any twinned axes
_break_share_link(ax, ax._twinned_axes)

# Note: in the docstring below, the newlines in the examples after the
# calls to legend() allow replacing it with figlegend() to generate the
# docstring of pyplot.figlegend.
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15 changes: 15 additions & 0 deletions lib/matplotlib/tests/test_axes.py
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Expand Up @@ -4663,6 +4663,21 @@ def test_spectrum():
ax.set(xlabel="", ylabel="")


@check_figures_equal(extensions=['png'])
def test_twin_remove(fig_test, fig_ref):
ax_test = fig_test.add_subplot()
ax_twinx = ax_test.twinx()
ax_twiny = ax_test.twiny()
ax_twinx.remove()
ax_twiny.remove()

ax_ref = fig_ref.add_subplot()
# Ideally we also undo tick changes when calling ``remove()``, but for now
# manually set the ticks of the reference image to match the test image
ax_ref.xaxis.tick_bottom()
ax_ref.yaxis.tick_left()


@image_comparison(['twin_spines.png'], remove_text=True)
def test_twin_spines():

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