Global Singletons with Rust in 1.8.0 doesn't seem to work

[kingsleyh]

Hi,

I followed the example in the docs e.g:

export global Logic  {
    pure callback to-upper-case(string) -> string;
}

export component Main inherits Window {}

I put the export global in my main.slint file above the Main component (it says in the docs I need to put the global export in the same file as the entry component which I've done)

then in the Rust code:

let main = Main::new().unwrap();
    main.global::<Logic>().on_to_upper_case(|string| {
        string.as_str().to_uppercase().into()
    });

However the Rust code doesn't compile because it doesn't find the Logic in the global scope. When I look inside the slint_generatedMain class in target I don't see anything called Logic but I do see things like Logic_500 and InnerLogic_500 etc

Not sure if I'm just doing it wrong or if this is a bug with the Rust lib?

any help greatly appreciated

[ogoffart]

I just tried again to build the example and it does work.
Is the logic declared in the main file? Or is it exported from the main file?

[kingsleyh]

hmm yes you are right - I've tried it on the rust slint template project and it worked.

I think I'm trying to use it in a way that is not supported. I wanted to avoid passing callbacks and properties down thru a hierarchy of components - and I wanted to place an export global ComponentNameProps {} in each of my component slint files and then access the callbacks and properties from Rust using the main.global::().on_xxx where ever I needed instead of having all the properties and callbacks on the main.

I've had some success by putting the export global ComponentNameProps in another file props.slint and then where I need to use it I've had to import { ComponentNameProps as ComponentNamePropsEx } from "props.slint" and then export { ComponentNamePropsEx} and then access it in Rust as main.global::().on_xxx

But it's a bit fiddly having to import and then export it again. But if I don't it doesn't seem to work.