Base16 colour scheme template, for quickly setting colours

[IFcoltransG]

I found it hard to style my egui with a colour palette, because explicitly setting all the colours for widgets, windows and etc is quite low-level, and I need something more abstract and high-level for it to be convenient. Even something like egui-themer requires setting colours manually and has clutter for styling non-colour parts of egui.

So I've put together a hasty Base16 template so it's quicker to colourise egui if you already have 16 colours in the Base16 format. You'd use the template and a colour scheme to generate a Rust file, put it in your project, and then call a function on your Style to get a new one with the colours replaced.

Feel free to PR or use the code to make new things (it's MIT-0). I haven't tested whether all the colour assignments look nice so you may see room for improvement.

[j-n-f]

Here's what I did to get this working (as it wasn't straightforward):

1. install php and composer
2. git clone https://github.com/IFcoltransG/base16-egui
3. git clone https://github.com/chriskempson/base16-builder-php
4. cd base16-builder-php
5. composer install
6. cat /path/to/your/scheme.yaml | php base16-builder.php --template . ./base16-egui/templates/default.mustache

It seems best to go with the original base16-builder as many others don't seem to implement the builder specification correctly, or do silly things like try to manage the color schemes for you (and for me they were missing the one I wanted).

Nice work, @IFcoltransG 🙂

[j-n-f]

Only other comment I would make is that some of the active/hover styles are hard to read with the default text colour.

This is really apparent with egui::SelectableLabel. Easy enough to change though.

This is a really great start for a crate with all the themes built in. If you just have a bunch of functions returning Style structs you're good to go.

[IFcoltransG]

Glad you like it, and thanks for writing down the steps you used! And sorry you had to figure it out. Unfortunately I'm not planning to maintain or develop this project in the near future, but anyone planning to take it further absolutely has my blessing.

[j-n-f]

This could just be because it's a dark theme, but I had better luck with these two changes:

visuals.widgets.active.fg_stroke.color: EXTREME_BACKGROUND,
visuals.selection.stroke.color: EXTREME_BACKGROUND,