APP_HANDLER

zng_app::handler

Struct APP_HANDLER

pub struct APP_HANDLER;

Expand description

Service available in app scoped Handler<A> calls.

Implementations§

impl APP_HANDLER

pub fn weak_handle(&self) -> Option<Box<dyn AppWeakHandle>>

Acquire a weak reference to the event subscription handle if the handler is being called in the app scope.

pub fn unsubscribe(&self)

Unsubscribe, if the handler is being called in the app scope.

pub fn is_preview(&self) -> bool

If the handler is being called in the preview track.

pub fn with<R>( &self, handle: Box<dyn AppWeakHandle>, is_preview: bool, f: impl FnOnce() -> R, ) -> R

Calls f with the handle and is_preview values in context.

Auto Trait Implementations§

impl Freeze for APP_HANDLER

impl RefUnwindSafe for APP_HANDLER

impl Send for APP_HANDLER

impl Sync for APP_HANDLER

impl Unpin for APP_HANDLER

impl UnwindSafe for APP_HANDLER

Blanket Implementations§

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where T: 'static + ?Sized,

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