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Text rotation patch by Alex-Carter01 · Pull Request #19114 · matplotlib/matplotlib · GitHub

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Text rotation patch - #19114

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Alex-Carter01 wants to merge 3 commits into
matplotlib:mainfrom
Alex-Carter01:text-rotation-patch
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Text rotation patch#19114
Alex-Carter01 wants to merge 3 commits into
matplotlib:mainfrom
Alex-Carter01:text-rotation-patch

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Alex-Carter01 commented Dec 14, 2020

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PR Summary

Resolves issue #13044. Fixing calculation error of Y-offset for specific rotation mode of text. This pull also includes a proposed minimal test (based off the original bug report).

PR Checklist

  • Has pytest style unit tests (and pytest passes).
  • Is Flake 8 compliant (run flake8 on changed files to check).
  • [N/A] New features are documented, with examples if plot related.
  • [N/A] Documentation is sphinx and numpydoc compliant (the docs should build without error).
  • Conforms to Matplotlib style conventions (install flake8-docstrings and run flake8 --docstring-convention=all).
  • [N/A] New features have an entry in doc/users/next_whats_new/ (follow instructions in README.rst there).
  • [N/A] API changes documented in doc/api/next_api_changes/ (follow instructions in README.rst there).

add comparison image for rotation test in test_text
8a6dc24
patch to rotation error in anchor, center_baseline mode
7c939d9 
fix to error in calculation of Y offset in text rotation.
todo: test and test baseline
add corresponding test for proposed patch to text rotation
762c32e 
see baseline_images for corresponding baseline

jklymak commented Dec 15, 2020

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Thanks a lot for the pull request! Unfortunately this broke some existing tests in test_text.py, so this isn't compatible with the existing behaviour. So you will either have to change the old tests and argue that they were wrong, or modify this....

story645 commented Apr 6, 2021

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hey @Alex-Carter01, do you have any bandwidth to finish up this PR?

timhoffm mentioned this pull request Apr 7, 2021
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jklymak marked this pull request as draft April 23, 2021 16:58

WeatherGod commented Apr 24, 2021

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Oh, and we should double-check with the Cairo renderer, although I suspect it might have the same bug if this is happening at a layer above AGG/Cairo?

safdarzareef mentioned this pull request Apr 24, 2021
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dstansby commented Dec 18, 2021

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Thanks for opening this PR. Unfortunately I don't think this is the correct fix. ymax1 - baseline / 2.0 seems to be the correct logic, putting the offset halfway between the baseline and ymax, so I think subtracting ymin1 is incorrect. As such I'm going to close this PR - if I've missed something feel free to comment and I will open it up again, and thanks again for the contribution.

dstansby closed this Dec 18, 2021
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