How to export struct member as rust type Vec<XXX> but not ModeRC<XXX> in slint ?

[fluolite]

Such as the following code.

slint code

export struct DeviceGroupModel {
    group_id: int,
    groups: [DeviceGroupVo],
}

[hunger]

It's a ModelRc<T> since we need change notification.

You can extract the information into a Vec<T> in the business logic when needed. If you use a VecModel to back the ModelRc, then that should be reasonably cheap (but includes a clone!). A SharedVecModel can get you a slice, so that could avoid the copy call, but at the price of not having a real Vec.

To downcast from a ModelRc to a VecModel, use:

model_rc.as_any().downcast_ref::<VecModel<i32>>().unwrap().push(4);