(Feature): Application Theming

[totoroot]

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Provide a description of your feature request

I like working with Natron, but one thing that's missing for me is the ability to theme the application itself. I couldn't really find any themes besides @olear's https://github.com/olear/natron-styles, but I think the resource it outdated by now. I tried looking into creating some custom but did not get far.

I noticed that there is the option to set a custom theme by using a custom mainstyle.qss but I did not find any documentation on how to adapt the file to achieve another color palette.
I'm unsure how colours are set in the QSS file since no hex colour values are used but rather color references like { color: %10; }.

Could anyone point me at some helpful resources to help me create some themes? I'd like to contribute so please let me know how I should best go about creating a set of themes for Natron.

Thanks in advance!

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Additional details

No response

[rodlie]

The colors (%INT) in the stylesheet comes from Natron. You can just set whatever color you want in the stylesheet if wanted, the general styling works as in any other Qt app (for specific Natron classes see the mainstyle for more info), but note that a lot styling is hardcoded in the app, so you might not get the result you want.

I will start styling and improve the options for (style) customization in Natron after we move to Qt5 (Natron 2.6+).