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Handle

Struct Handle 

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pub struct Handle<Msg: Send + 'static> { /* private fields */ }
Expand description

Asa al runtime de Llimphi. Clonable y enviable entre hilos: la usás para pedir cerrar la ventana o para lanzar trabajo (PAM, IO, etc.) que al terminar reentra con un Msg al update.

Tests pueden construir un handle “muerto” con Handle::for_test: los dispatch/quit/spawn siguen siendo seguros de llamar pero los Msg que generan no van a ningún lado (no hay event loop detrás).

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impl<Msg: Send + 'static> Handle<Msg>

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pub fn for_test() -> Self

Construye un handle desactivado para tests — todos los dispatch se descartan silenciosamente. Útil para probar funciones que toman &Handle<Msg> sin levantar un event loop real (que en CI sin display tiraría).

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pub fn quit(&self)

Cierra la ventana y termina el bucle. La transición en curso (si la hay) se completa antes de salir.

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pub fn lift<Sub, F>(&self, lift: F) -> Handle<Sub>
where Sub: Send + 'static, F: Fn(Sub) -> Msg + Send + Sync + 'static,

Deriva un handle para un sub-app hospedado: el update/efectos del sub-app usan su propio Sub msg, y lift los eleva al Msg del host antes de despacharlos a este loop. Es la pieza que permite embeber un App entero en otro (junto con crate::View::map para su view) sin reescribirlo a patrón módulo. El sub-handle es Clone + Send como cualquier handle. open_window/close_window/quit quedan no-op en él (esas son del host).

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pub fn open_window( &self, key: u64, title: impl Into<String>, width: u32, height: u32, )

Abre una ventana OS secundaria (ver App::secondary_view). La key la elige la app para reconocerla luego; abrir con una key que ya existe sólo la enfoca (no duplica). El contenido lo pinta App::secondary_view(model, key) y los eventos (click/tecla/…) reentran al mismo update, así que la ventana comparte el modelo con la primaria. Cerrala con Self::close_window o con el botón del SO.

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pub fn close_window(&self, key: u64)

Cierra la ventana secundaria con esa key (no-op si no existe). La ventana primaria nunca se cierra por acá — para eso está Self::quit.

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pub fn dispatch(&self, msg: Msg)

Encola un Msg para procesarse en el próximo turno del bucle. Útil para que un callback externo reentre al update.

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pub fn spawn<F>(&self, f: F)
where F: FnOnce() -> Msg + Send + 'static,

Lanza una closure en un hilo aparte; cuando devuelve Msg, el runtime la entrega al update en el hilo de UI. Pensado para trabajo bloqueante (PAM tarda ~2 s ante un fallo, p. ej.).

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pub fn spawn_periodic<F>(&self, period: Duration, f: F)
where F: Fn() -> Msg + Send + 'static,

Lanza un loop periódico en un hilo aparte: cada period invoca f() y dispatcha el Msg resultante al update. El thread queda corriendo hasta que el event loop se cierra (en ese punto el send_event falla silenciosamente y el thread spinea hasta el exit del proceso, costo despreciable).

Útil para ticks de simulación (~11 Hz en dominium), polling de hardware, o cualquier feed que necesite Msgs a intervalos regulares. Si f necesita state, capturalo en la closure por move; la closure se ejecuta en un thread aparte así que el state capturado debe ser Send.

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impl<Msg: Send + 'static> Clone for Handle<Msg>

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fn clone(&self) -> Self

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more

Auto Trait Implementations§

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impl<Msg> !RefUnwindSafe for Handle<Msg>

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impl<Msg> !UnwindSafe for Handle<Msg>

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impl<Msg> Freeze for Handle<Msg>

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impl<Msg> Send for Handle<Msg>

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impl<Msg> Sync for Handle<Msg>

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impl<Msg> Unpin for Handle<Msg>

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impl<Msg> UnsafeUnpin for Handle<Msg>

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<ST, DT> CastableFrom<ST, Initialized, Initialized> for DT
where ST: ?Sized, DT: ?Sized,

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impl<ST, DT> CastableFrom<ST, Uninit, Uninit> for DT
where ST: ?Sized, DT: ?Sized,

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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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impl<T> Downcast for T
where T: Any,

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fn into_any(self: Box<T>) -> Box<dyn Any>

Convert Box<dyn Trait> (where Trait: Downcast) to Box<dyn Any>. Box<dyn Any> can then be further downcast into Box<ConcreteType> where ConcreteType implements Trait.
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fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>

Convert Rc<Trait> (where Trait: Downcast) to Rc<Any>. Rc<Any> can then be further downcast into Rc<ConcreteType> where ConcreteType implements Trait.
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fn as_any(&self) -> &(dyn Any + 'static)

Convert &Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &Any’s vtable from &Trait’s.
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fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

Convert &mut Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &mut Any’s vtable from &mut Trait’s.
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impl<T> Downcast<T> for T

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fn downcast(&self) -> &T

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impl<T> DowncastSync for T
where T: Any + Send + Sync,

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fn into_any_arc(self: Arc<T>) -> Arc<dyn Any + Send + Sync>

Convert Arc<Trait> (where Trait: Downcast) to Arc<Any>. Arc<Any> can then be further downcast into Arc<ConcreteType> where ConcreteType implements Trait.
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> Read<Exclusive, BecauseExclusive> for T
where T: ?Sized,

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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<T> Upcast<T> for T

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fn upcast(&self) -> Option<&T>

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impl<T> WasmNotSend for T
where T: Send,

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impl<T> WasmNotSendSync for T

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impl<T> WasmNotSync for T
where T: Sync,

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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more