Struct AnyEvent 

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

Represents a type erased event variable.

Implementations

impl AnyEvent

pub fn subscribe(&self, op: UpdateOp, widget_id: WidgetId) -> VarHandle

Subscribe the widget to receive updates when events are relevant to it.

pub fn var(&self) -> AnyVar

Variable that tracks all the args notified in the last update cycle.

Note that the event variable is only cleared when new notifications are requested.

pub fn hook( &self, handler: impl FnMut(&(dyn AnyEventArgs + 'static)) -> bool + Send + 'static, ) -> VarHandle

Setups a callback for just after the event notifications are listed, the closure runs in the root app context, just like var modify and hook closures.

The closure must return true to be retained and false to be dropped.

Any event notification or var modification done in the handler will apply on the same update that notifies this event.

Trait Implementations

impl Clone for AnyEvent

fn clone(&self) -> AnyEvent

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AnyEvent

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

Formats the value using the given formatter.

impl Hash for AnyEvent

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

where H: Hasher,

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 AnyEvent

fn eq(&self, other: &AnyEvent) -> 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 Copy for AnyEvent

impl Eq for AnyEvent