fix annotations font color #2892
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Thanks for this pull request! I'll try to review and merge it soon. The build failure is odd and I've seen it before but it doesn't make a ton of sense. I'll look into it :) |
| zmid = (zmax + zmin) / 2 | ||
| if min_text_color == max_text_color: | ||
| # diverging colorscale | ||
| mid_text_color = "#000000" |
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I'm not sure this is a great default... this is assuming the diverging scale is light in the middle?
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I wonder if we shouldn't accept a third color in font_colors for this and only set this one here if it's not present?
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Yes can be an option but is there any diverging colorscale where the it's not the case?
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Well, users can pass in their own colorscale, they're not limited to just the built-in ones.
| """ | ||
| Get annotations for each cell of the heatmap with graph_objs.Annotation | ||
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| :rtype (list[dict]) annotations: list of annotations for each cell of | ||
| the heatmap | ||
| """ | ||
| min_text_color, max_text_color = _AnnotatedHeatmap.get_text_color(self) | ||
| z_mid = _AnnotatedHeatmap.get_z_mid(self) | ||
| if zmin is None or zmax is None: | ||
| zmin, zmax = _AnnotatedHeatmap.get_z_min_max(self) |
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here it seems like we overwrite both if either is missing? probably best not to do that I think.
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From what I understand from the doc https://plotly.github.io/plotly.py-docs/generated/plotly.graph_objects.Heatmap.html "zmax – Sets the upper bound of the color domain. Value should have the same units as in z and if set, zmin must be set as well." we can not pass only one of these 2 thats why i overwrite both
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This is true of the underlying heatmap trace, yes, but this figure-factory already does its own bounds-computation, so we may as well reuse it. I've already addressed this comment in #2921.
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Thanks for this PR! It's prompted me to make this one #2921 which is a bit more targeted and doesn't change any method signatures etc. I'd love your thoughts on the other one, and if we merge that then you can try to build on it to address the color problem in diverging colorscales? |
Correct the font annotation color when using zmin and zmax or zmid #2187
