Struct Callback

pub struct Callback<'a, T = ()> { /* private fields */ }

A callback that can be called from any thread.

Implementations

impl<'a, T> Callback<'a, T>

pub fn new(callback: impl FnMut(&T) + Sendable + 'a) -> Self

Creates a new callback.

pub fn downgrade(&self) -> WeakCallback<T>

Downgrades the callback to a WeakCallback.

When the last strong reference is dropped, the callback will be dropped and all weak callbacks will be invalidated.

pub fn emit(&self, event: &T)

Calls the callback.

Trait Implementations

impl<'a, T: Clone> Clone for Callback<'a, T>

fn clone(&self) -> Callback<'a, T>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'a, T> Default for Callback<'a, T>

fn default() -> Self

Returns the “default value” for a type.