moment/docs/THEMING.md
2021-03-03 17:14:55 -04:00

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# Theming
A default theme from this repository can be copied to use as a base and edit,
for example:
```sh
cp mirage/src/themes/Midnight.qpl \
"${XDG_DATA_HOME:-$HOME/.local/share}/mirage/themes/MyTheme.qpl"
```
Or for Flatpak users:
```sh
cp mirage/src/themes/Midnight.qpl \
~/.var/app/io.github.mirukana.mirage/data/mirage/themes/MyTheme.qpl
```
The `theme` property in [`settings.py`](CONFIG.md#settingspy) would need
to be set to `MyTheme.qpl` in this case.
Theme files are nested-by-indentations sections of properties and values.
Properties are declared as `<type> <name>: <value>`.
Values can be any JavaScript (ECMAScript 7) expressions.
Most of the properties are of type `color`.
Their values, if not just refering to another property,
can be expressed with a:
- [SVG/CSS color name](https://www.december.com/html/spec/colorsvg.html)
string, e.g. `"blue"`
- Hexadecimal code string, e.g. `"#fff"` or `"#cc0000"`
- RGBA value, using the `Qt.rgba(0-1, 0-1, 0-1, 0-1)` function
- HSLA value, using the `Qt.hsla(0-1, 0-1, 0-1, 0-1)` function
- HSVA value, using the `Qt.hsva(0-1, 0-1, 0-1, 0-1)` function
- [HSLUV](https://www.hsluv.org/) value, using the
`hsluv(0-360, 0-100, 0-100, 0-1)` function. This is the prefered method
used throughout the default theme files
(why? see [this](https://www.hsluv.org/comparison/#rainbow-hsluv) and
[that](https://www.boronine.com/2012/03/26/Color-Spaces-for-Human-Beings/#hsl-is-a-lemon))
If you just want to change the background picture,
or use a gradient/simple color instead, search for the `ui:` section in your
text editor.
When an in-use theme file is saved while the application is running, it
will automatically be reloaded and changes will be seen immediatly.
**Warnings**:
- API currently unstable: theme properties are often renamed, added or deleted.
- The file format for themes will soon change
- The current file format forces all theme to have all properties
defined, instead of being able to only specify the ones to override from the
default theme.