Struct Callback 

pub struct Callback<T = ()>(/* private fields */);

A callback type. It is usually signaled in a GUI widget callback.

Implementations

impl<T> Callback<T>

pub fn new() -> Self

Create Callback.

pub fn signal<R: Runnable>(&self, v: T) -> bool

Signal the callback and try to run the runtime if there’s a waker waiting. Returns true if not handled.

pub fn wait(&self) -> impl Future<Output = T> + '_

Wait for signal.

Trait Implementations

impl<T: Debug> Debug for Callback<T>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<T> Default for Callback<T>

fn default() -> Self

Returns the “default value” for a type.