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Backport PR #17602: FIX: propagate _is_saving state when changing can… #17609

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merged 1 commit into from Jun 10, 2020
Merged

Backport PR #17602: FIX: propagate _is_saving state when changing can… #17609

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5 changes: 3 additions & 2 deletions lib/matplotlib/backend_bases.py
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Expand Up @@ -2068,8 +2068,9 @@ def print_figure(self, filename, dpi=None, facecolor=None, edgecolor=None,
# Some code (e.g. Figure.show) differentiates between having *no*
# manager and a *None* manager, which should be fixed at some point,
# but this should be fine.
with cbook._setattr_cm(self, _is_saving=True, manager=None), \
cbook._setattr_cm(self.figure, dpi=dpi):
with cbook._setattr_cm(self, manager=None), \
cbook._setattr_cm(self.figure, dpi=dpi), \
cbook._setattr_cm(canvas, _is_saving=True):

if facecolor is None:
facecolor = rcParams['savefig.facecolor']
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9 changes: 9 additions & 0 deletions lib/matplotlib/tests/test_figure.py
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Expand Up @@ -487,3 +487,12 @@ def test_removed_axis():
fig, axs = plt.subplots(2, sharex=True)
axs[0].remove()
fig.canvas.draw()


@check_figures_equal(extensions=["svg", "pdf", "eps", "png"])
def test_animated_with_canvas_change(fig_test, fig_ref):
ax_ref = fig_ref.subplots()
ax_ref.plot(range(5))

ax_test = fig_test.subplots()
ax_test.plot(range(5), animated=True)