CSS roadmap proposal

[Thiago Milczarek Sayão]

Hi,

- Allow global CSS. I might be missing something, but I think there's no
easy way to tell JavaFx
to use a CSS for the entire application.

- Font Family Fallback: Add support for font family fallbacks in
-fx-font-family, similar to standard CSS.
 For example: -fx-font-family: "Inter", "Noto Sans", sans-serif;

- Media Queries for device/screen size: Introduce support for media queries
to adapt styles based on screen size,
resolution, or other device characteristics. This will help usage of JavaFx
outside of "desktop applications" scope,
especially on devices where the application takes the entire screen.

- Image Scaling: Provide a declarative way to scale images relative to
their container size (e.g., percentage-based width/height).

I’d be cautious about introducing an entirely new theme, as it could
significantly increase the long-term maintenance effort.
I would instead, improve modena by allowing it to be more customizable.

-- Thiago.



Em qui., 29 de mai. de 2025 às 15:32, Michael Strauß <
michaelstrau2 at gmail.com> escreveu:

> Here is how I think we should be evolving JavaFX CSS over the next
> period of time:
>
> 1. Media queries
> Gist: https://gist.github.com/mstr2/cbb93bff03e073ec0c32aac317b22de7
> PR: https://github.com/openjdk/jfx/pull/1655
>
> This feature is already out for review.
>
> 2. System colors
> Gist: https://gist.github.com/mstr2/afac42ab9587c1040a6cf7b091cee99f
>
> System colors allow stylesheet authors to use colors that are defined
> by the scene or the platform. Most notably, this includes the accent
> color. We will also add new media queries to help stylesheet authors
> deal with contrast modes.
>
> 3. With media queries and system colors in place, we can remove the
> built-in high contrast stylesheets that come with Caspian and Modena.
> Instead of hard-coding these special cases (and not even in a good
> way), we can now use standard APIs to achieve a better result. This
> will remove a big chunk of special-casing from the codebase and bring
> us closer to an equal playing field of built-in vs. third-party
> themes.
>
> 4. Dark Modena / Modena 2025?
>
> 5. Bold new theme?
>
>
> What do you think? Please focus comments on step 1-3, and not on
> bikeshedding a new theme.
>
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