How to access/change value of global predefined Palette variable in Rust API ?

[Jordan-Haidee]

I want to switch the value of predefined Palette.color-scheme in Rust code, but I don't find any way to do that. Some help is needed. Thanks! ❤️❤️❤️

A possible way maybe:

let palette = app.global::<Palette>();
palette.set_color_scheme(xxx);

but it doesn't work as expected.

[Apollo-Roboto]

I just tried, I thought I could get it by simply reexporing the Palette global, but I can't access the ColorScheme enum. So here's my incomplete answer:

Reexport the Palette global:

import { Palette } from from "std-widgets.slint";
export { Palette, ColorScheme }

Then you can find the palette from the global function like you had:

let palette = app.global::<Palette>();

So almost there, but this call doesn't work for me as ColorScheme is still not exposed, I'd be curious to see the solution too (maybe a bug?).

palette.set_color_scheme(ColorScheme::Dark);

[Apollo-Roboto]

Meanwhile, you can make functions to change the Palette, maybe not exactly what you wanted but could help out:

import { Palette } from from "std-widgets.slint";
export component AppWindow inherits Window {
    public function set_dark_theme() {
        Palette.color-scheme = ColorScheme.dark;
    }
    public function set_light_theme() {
        Palette.color-scheme = ColorScheme.light;
    }
}

app.invoke_set_dark_theme();

[Jordan-Haidee]

Yeah, it really works. Thanks!

[megabyte6]

@Jordan-Haidee @Apollo-Roboto I'm not sure if it's a new addition from a later version, but it seems to work fine for me.

I can add these to my .slint file:

import { Palette } from from "std-widgets.slint";
export { Palette } // you don't even need to export ColorScheme

And I can access them from Rust as so:

app.global::<Palette>().set_color_scheme(ColorScheme::Dark);

I can also break it down like:

let palette = app.global::<Palette>();
palette.set_color_scheme(ColorScheme::Dark);

Now this requires slint::include_modules!(); at the top of your Rust file, but you should have that there anyways.

[Jordan-Haidee]

Yes, as you mentioned, after testing, the above code works in version 1.15.1, but throws an error in 1.14.1. 🤗