Create a 2d vector model

[nic-obert]

Reading #4632 and the old documentation, I see it's possible to create a 1d vector like VecModel<SharedString> that then gets interpretes as a [string] by the slint language. However, I can't figure out how to create a 2d vector model of type VecModel<VecModel<SharedString>> (or some type like that). Such a model shall be interpreted by the slint language as a [[string]], to then be used in a for loop to create multiple widgets that each require a [string] input property.

The following attempt produces the error below

let reg_sets: Rc<VecModel<VecModel<SharedString>>> = Rc::new(VecModel::from(vec![]));
let reg_sets = ModelRc::from(reg_sets.clone());

rustc: the trait bound `slint::VecModel<slint::SharedString>: std::clone::Clone` is not satisfied

What am I doing wrong? Has anyone been able to create a 2d vector model? Is there a better approach?

[nic-obert]

I found a solution. The inner ModelRc can then be downcast to a VecModel when accessing elements.

let regs: Rc<VecModel<ModelRc<SharedString>>> = Rc::new(VecModel::from(vec![]));
let regs_model = ModelRc::from(regs);