Fix font weights#919
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For comparison, the KivaExplorer script in #905 now displays the following on either agg backend: |
rkern
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Mar 25, 2022
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Minor readability suggestion, but LGTM!
| if font.style in (constants.BOLD, constants.BOLD_ITALIC): | ||
| weight = agg.FontWeight.Bold | ||
| weight = font_weights.get(font._get_weight(), agg.FontWeight.Regular) | ||
| style = (font.style in constants.italic_styles) |
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This bool should still be named italic, I think. There's no reason why style=True should mean "this font is italic".
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This is a reasonably comprehensive fix for #905 following the suggestions given there. Together with #918 it gives good support for more refined font weights and styles on
qpainterand both agg backends, as well as consistent behaviour on backends which only support bold and normal weights. It is also backwards compatible with code that usesstylefor both italic and bold, raising aDeprectationWarningif thestyleis bold.In making the changes, this PR also cleans up some of the early Python 2-ish idioms and uses more modern constructs where appropriate.
It includes smoke tests for rendering text in all combinations of font families, weights and styles on each backend, as well as adding tests for the
KivaFonttrait. Documentation is also updated.This PR doesn't attempt to update backends which can potentially support more font weights (eg. quartz) but which haven't exposed it in the C/C++ wrappers. It also doesn't attempt to update or improve the font parsers to understand the new weight types - that should be a different PR.
Fixes #905.