> The problem is that it requires shared mutable access to that state, which is clunky at best in Rust (it requires interior mutability).
I don't see the problem with using interior mutability (Rc> or Arc>)
With Slint [1], we just embrace it, and rely on interior mutability for the shared state, and that works well.
I tried using interior mutability in rui [1] but the clunkiness appeared in having to call clone on the Rc/Arc too often. I'd have a few clones before moving into a closure, like this:
let text = self.text.clone();
focus(move |has_focus| {
let text = text.clone();
state(TextEditorState::new(), move |state| {
let text = text.clone();
let text2 = text.clone();
let cursor = state.with(|s| s.cursor);
let state2 = state.clone();
focus(move |has_focus| {
state(TextEditorState::new, move |state, cx| {
let cursor = cx[state].cursor;
canvas(move |cx, rect, vger| {