Fix legend labelcolor=‘linecolor’ to handle various corner cases, e.g. step histograms and transparent markers
#30328
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…o `linecolor`, e.g. ensuring that histograms with `step` histtype do not end up with an empty label
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…m `c, fc` to `mfc, fc, mec, ec, c`; check if `color` is empty, `none` or transparent and loop on if so
…ne` for both `c` and `ec` to ensure invisibility, in classic black edges are default
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Nice work @lukashergt ! The tests are really helpful and good. Glad it was fixed by u :) U deserve the credit. |
Using helper for `'none'` string equality and using the fact that `to_rgba` always returns a 4-element tuple to simplify the code. Co-authored-by: Tim Hoffmann <[email protected]>
…ble handles; can pass empty string `" "` to achieve empty/invisible label instead; having a black legend label by default allows the creation of neutrally coloured dummy entries
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I'm pretty sure the current test failure has nothing to do with this PR. Some check timed out. If I could, I would simply try to re-run that test. Anything else that I should be doing, @timhoffm? |
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The test failure is unrelated. From my perspective, you don't have to do anything. We just have to wait for a second reviewer approval. |
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Thanks @lukashergt! Congratulations on your first PR to Matplotlib 🎉 We hope to hear from you again. |
PR summary
This PR addresses issue #30298, which pointed out some corner cases, where
labelcolor='linecolor'did not work as expected, e.g.:histtype='step'or scatter plots withfc='none'had an empty legend label.mecandmfcbut notcwould end up with non-matching handle and label colours.The failing checks in this test from commit dabaf62 highlight the issue.
Changes:
'linecolor'ordering of checks fromc, fctomfc, fc, mec, ec, c.coloris empty, equal tononeor with a zero alpha value, e.g. whenfcis'none'continue the loop to check whether there is some color inec.Thanks to @nrnavaneet, who worked on this in #30299, and which this PR is based on.
Closes #30298
PR checklist
Plotting related features are demonstrated in an exampleNew Features and API Changes are noted with a directive and release noteDocumentation complies with general and docstring guidelines