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1 Summary
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2 -------
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3
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4 * To be able to use the latest/adequate version of sass, install sassc
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5 * meson will regenerate the CSS every time you modify the SCSS files.
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6 * Note that meson always builds out-of-tree, so the modified css files will
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7 appear in your builddir.
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8
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9 Theme variants
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10 --------------
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11
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12 The Default theme comes in 4 variants: light, dark, hc (highcontrast) and
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13 hc-dark (highcontrast inverse). The generated CSS files for the variants
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14 are called Default-$variant.css. For technical reasons, GTK adds one level
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15 of include wrappers around these, which are called gtk-$variant.css.
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16
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17 How to tweak the theme
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18 ----------------------
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19
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20 Default is a complex theme, so to keep it maintainable it's written and
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21 processed in SASS. The generated CSS is then transformed into a gresource file
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22 during gtk build and used at runtime in a non-legible or editable form.
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23
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24 It is very likely your change will happen in the _common.scss file. That's where
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25 all the widget selectors are defined. Here's a rundown of the "supporting"
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26 stylesheets, that are unlikely to be the right place for a drive by stylesheet
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27 fix:
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28
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29 _colors.scss - global color definitions. We keep the number of defined
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30 colors to a necessary minimum, most colors are derived
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31 from a handful of basics. It covers both the light variant
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32 and the dark variant.
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33
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34 _colors-public.scss - SCSS colors exported through gtk to allow for 3rd party
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35 apps color mixing.
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36
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37 _drawing.scss - drawing helper mixings/functions to allow easier
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38 definition of widget drawing under specific context. This
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39 is why Default isn't 15000 LOC.
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40
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41 _common.scss - actual definitions of style for each widget. This is
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42 where you are likely to add/remove your changes.
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43
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44 You can read about SASS at http://sass-lang.com/documentation/. Once you make
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45 your changes to the _common.scss file, GTK will rebuild the CSS files.
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