How to pass a struct into slint component?

[evan0greenup]

There is callback element inside a slint component.

But it can only be a stateless function. If I want to pass a struct with its own state and method. And let the event (click ...) to access and modify this struct and also invoke the struct's method.

What should I do?

[ogoffart]

You can define struct in slint with

struct FooBar { boo: string, baa: int }

Then you can use this string in a property, or a callback, like so:

component Comp {
    in property <FooBar> some-property;
    callback do-something(FooBar);
}

You can also have property or callback on global.

That way you can access, from native code, to struct declared in Slint by adding a callback handler.

If you want to access structs written in native code for slint, this hasn't been implemented yet, but is planed in #1726