Struct Mutable 

pub struct Mutable<T: 'static>(/* private fields */);

Local widget state that drives recomposition on every write.

Unlike crate::remember_state (a bare Rc<RefCell<T>> that never requests a frame), Mutable calls request_frame on set/update so async / timer / layout-callback mutations reliably re-render. Prefer Signal for shared/derived state; use Mutable for widget-local state that should always recompose.

Implementations

impl<T: 'static> Mutable<T>

pub fn new(v: T) -> Self

pub fn get(&self) -> Ref<'_, T>

pub fn with<R>(&self, f: impl FnOnce(&T) -> R) -> R

Read the current value without holding the borrow across the closure.

pub fn set(&self, v: T)

pub fn set_neq(&self, v: T)

where T: PartialEq,

Unconditional write + frame request. Prefer set_neq/update_neq for UI state where equality is cheap - set/update always invalidate. Like [set], but skips the frame request + signal when the value is unchanged (T: PartialEq).

pub fn update(&self, f: impl FnOnce(&mut T))

pub fn update_neq(&self, f: impl FnOnce(&mut T))

where T: PartialEq + Clone,

Like [update], but only requests a frame + fires the signal when the value actually changed (T: PartialEq + Clone).

pub fn borrow_mut_silent(&self) -> RefMut<'_, T>

Escape hatch when batching many writes. Call request_frame yourself.

pub fn as_rc(&self) -> Rc<RefCell<T>>

Trait Implementations

impl<T: 'static> Clone for Mutable<T>

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.