Struct Mapped 

pub struct Mapped<F, V: 'static, U: 'static> { /* private fields */ }

A converted view of a field: an ISO string as a date, #RRGGBB as a color, an index into a table as the value it names. Copy, and still a binding, so it goes straight into a control.

Implementations

impl<F: Source<V> + Copy, V: 'static> Mapped<F, V, usize>

pub fn map_to_f64(self) -> Numeric<Self>

usize as the f64 a slider speaks: the adapter every numeric control needs somewhere.

Trait Implementations

impl<F: Source<V>, V: Clone + Default + 'static, U: Clone + 'static> Binding<U> for Mapped<F, V, U>

The missing case converts the stored type’s default rather than requiring the UI type to have one: a Color has no Default, and asking every converted type for one would be a tax paid by every caller for a case only a deleted row reaches.

fn read(&self) -> U

Tracked read: the current value, subscribing the running computation to changes.

fn peek(&self) -> U

Untracked read: the current value, subscribing nothing (the reactive world’s “peek”).

fn write_preview(&self, u: U)

A live write mid-gesture (Event::ValueChanged): readers must follow, but nothing durable should key off it. Defaults to Binding::write: a plain signal has no notion of “durable”, and a degraded backend that never commits stays correct.

fn write_commit(&self, u: U)

The settled value that ends a gesture (Event::ValueCommitted). Defaults to Binding::write; a day-model field seals its preview session here: one change record, one undo unit, one UPDATE for the whole drag.

fn write(&self, u: U)

Write the value, waking whatever tracks it.

fn write_teardown(&self, v: T)

Seal the last preview when its control is disposed. Persistent bindings default to committing; scope-owned signals have already received the preview and may be gone.

impl<F: Copy, V, U> Clone for Mapped<F, V, U>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<F: Copy, V, U> Copy for Mapped<F, V, U>