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anntzeranntzer
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Turn ContourSet into a standard Collection artist.
Keep (some) backcompat by making access to ContourSet.collection trigger the self-replacement of the ContourSet by the old-style list of PathCollections. The baseline images are slighly shifted, but the new images actually look more correct; see e.g. contour_corner_mask_False.png where the old ("-expected.png") implementation would white out some extra L-shaped areas between masked regions (particularly visible in the diff image).
1 parent ba55c52 commit a275173

6 files changed

Lines changed: 448 additions & 274 deletions

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‎doc/api/next_api_changes/deprecations/25247-AL.rst‎

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``ContourSet.collections``
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~~~~~~~~~~~~~~~~~~~~~~~~~~
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... is deprecated. `.ContourSet` is now implemented as a single `.Collection` of paths,
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each path corresponding to a contour level, possibly including multiple unconnected
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components.
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During the deprecation period, accessing ``ContourSet.collections`` will revert the
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current ContourSet instance to the old object layout, with a separate `.PathCollection`
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per contour level.

‎lib/matplotlib/axes/_base.py‎

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@@ -2179,10 +2179,7 @@ def _sci(self, im):
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_api.check_isinstance(
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(mpl.contour.ContourSet, mcoll.Collection, mimage.AxesImage),
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im=im)
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if isinstance(im, mpl.contour.ContourSet):
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if im.collections[0] not in self._children:
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raise ValueError("ContourSet must be in current Axes")
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elif im not in self._children:
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if im not in self._children:
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raise ValueError("Argument must be an image, collection, or "
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"ContourSet in this Axes")
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self._current_image = im

‎lib/matplotlib/colorbar.py‎

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Original file line numberDiff line numberDiff line change
@@ -767,15 +767,15 @@ def add_lines(self, *args, **kwargs):
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lambda self, levels, colors, linewidths, erase=True: locals()],
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self, *args, **kwargs)
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if "CS" in params:
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self, CS, erase = params.values()
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if not isinstance(CS, contour.ContourSet) or CS.filled:
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self, cs, erase = params.values()
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if not isinstance(cs, contour.ContourSet) or cs.filled:
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raise ValueError("If a single artist is passed to add_lines, "
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"it must be a ContourSet of lines")
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# TODO: Make colorbar lines auto-follow changes in contour lines.
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return self.add_lines(
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CS.levels,
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CS.to_rgba(CS.cvalues, CS.alpha),
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[coll.get_linewidths()[0] for coll in CS.collections],
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cs.levels,
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cs.to_rgba(cs.cvalues, cs.alpha),
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cs.get_linewidths(),
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erase=erase)
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else:
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self, levels, colors, linewidths, erase = params.values()

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