Struct Binding 

pub struct Binding<T> { /* private fields */ }

A two-way connection to a value: a getter and a setter over App.

Cheap to clone (both accessors are Rc-shared) and 'static, so it can be captured by element closures. Build one from a Signal with Signal::binding or Signal::lens, or from raw accessors with Binding::new.

Implementations

impl<T: 'static> Binding<T>

pub fn new( get: impl Fn(&App) -> T + 'static, set: impl Fn(&mut App, T) + 'static, ) -> Self

Create a binding from a getter and a setter.

pub fn get(&self, cx: &App) -> T

Read the current value.

pub fn set(&self, cx: &mut App, value: T)

Write a new value.

pub fn map<U: 'static>( &self, from: impl Fn(T) -> U + 'static, into: impl Fn(U) -> T + 'static, ) -> Binding<U>

Bidirectional transform (e.g. Binding<f64> <-> Binding<String>): from converts on read, into converts back on write.

pub fn constant(value: T) -> Self

where T: Clone,

Read-only binding over a fixed value; writes are a no-op. Useful for disabled or demo states.

Trait Implementations

impl<T> Clone for Binding<T>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.