Merge EllipseSelector example together with RectangleSelector. #20602
+39
−57
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The old EllipseSelector example had similar issues as those fixed in
f288658 for RectangleSelector.
I'm not too happy with the explanation text, but that can be fixed
lated.
PR Summary
PR Checklist
pytest
passes).flake8
on changed files to check).flake8-docstrings
and runflake8 --docstring-convention=all
).doc/users/next_whats_new/
(follow instructions in README.rst there).doc/api/next_api_changes/
(follow instructions in README.rst there).