Struct zng_app::event::EventHandle

pub struct EventHandle(/* private fields */);

Represents an event widget subscription, handler callback or hook.

Implementations

impl EventHandle

pub fn dummy() -> Self

Handle to no event.

pub fn is_dummy(&self) -> bool

If the handle is not actually registered in an event.

pub fn perm(self)

Drop the handle without un-registering it, the resource it represents will remain registered in the event for the duration of the process.

pub fn with(self, other: Self) -> EventHandles

Create an EventHandles collection with self and other.

Trait Implementations

impl Clone for EventHandle

fn clone(&self) -> EventHandle

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for EventHandle

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

Formats the value using the given formatter.

impl Default for EventHandle

Dummy

fn default() -> Self

Returns the “default value” for a type.

impl Extend<EventHandle> for EventHandles

fn extend<T: IntoIterator<Item = EventHandle>>(&mut self, iter: T)

Extends a collection with the contents of an iterator.

fn extend_one(&mut self, item: A)

🔬This is a nightly-only experimental API. (extend_one)

Extends a collection with exactly one element.

fn extend_reserve(&mut self, additional: usize)

🔬This is a nightly-only experimental API. (extend_one)

Reserves capacity in a collection for the given number of additional elements.

impl FromIterator<EventHandle> for EventHandles

fn from_iter<T: IntoIterator<Item = EventHandle>>(iter: T) -> Self

Creates a value from an iterator.

impl Hash for EventHandle

fn hash<H: Hasher>(&self, state: &mut H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for EventHandle

fn eq(&self, other: &Self) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for EventHandle