How can I export struct with a function in slint?

[fluolite]

How can I export struct with a function member in slint, just like export global for rust to callback?

export struct Foo {
      bar: string,
      cb:  callback, // can I ?
}

export global UIContext {
    pure callback load_image(string, string,) -> image;
}

[ogoffart]

struct can't have callback.
Having callback like that wouldn't really work well in slint because if it can have a closure, it would need garbage collection of some sort.

I recommand doing something like this:

export struct Foo {
      bar: string,
      id: int,
}

export global UIContext {
   callback foo-callback(int);
}

And instead of calling foo.cb() you call UIContext.foo-callback(foo.id)

[fluolite]

When I has many pages, So I can only be binding it's property and callback in AppWindow ?