Struct iced::Subscription

source ·
pub struct Subscription<Message> { /* private fields */ }
Expand description

A request to listen to external events.

Besides performing async actions on demand with Command, most applications also need to listen to external events passively.

A Subscription is normally provided to some runtime, like a Command, and it will generate events as long as the user keeps requesting it.

For instance, you can use a Subscription to listen to a WebSocket connection, keyboard presses, mouse events, time ticks, etc.

Implementations§

source§

impl<Message> Subscription<Message>

source

pub fn none() -> Subscription<Message>

Returns an empty Subscription that will not produce any output.

source

pub fn from_recipe( recipe: impl Recipe<Output = Message> + 'static ) -> Subscription<Message>

Creates a Subscription from a Recipe describing it.

source

pub fn batch( subscriptions: impl IntoIterator<Item = Subscription<Message>> ) -> Subscription<Message>

Batches all the provided subscriptions and returns the resulting Subscription.

source

pub fn into_recipes(self) -> Vec<Box<dyn Recipe<Output = Message>>>

Returns the different recipes of the Subscription.

source

pub fn with<T>(self, value: T) -> Subscription<(T, Message)>
where Message: 'static, T: Hash + Clone + Send + Sync + 'static,

Adds a value to the Subscription context.

The value will be part of the identity of a Subscription.

source

pub fn map<F, A>(self, f: F) -> Subscription<A>
where Message: 'static, F: Fn(Message) -> A + MaybeSend + Clone + 'static, A: 'static,

Transforms the Subscription output with the given function.

Panics

The closure provided must be a non-capturing closure. The method will panic in debug mode otherwise.

Trait Implementations§

source§

impl<Message> Debug for Subscription<Message>

source§

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

§

impl<Message> !RefUnwindSafe for Subscription<Message>

§

impl<Message> !Send for Subscription<Message>

§

impl<Message> !Sync for Subscription<Message>

§

impl<Message> Unpin for Subscription<Message>

§

impl<Message> !UnwindSafe for Subscription<Message>

Blanket Implementations§

source§

impl<S, D, Swp, Dwp, T> AdaptInto<D, Swp, Dwp, T> for S
where T: Real + Zero + Arithmetics + Clone, Swp: WhitePoint<T>, Dwp: WhitePoint<T>, D: AdaptFrom<S, Swp, Dwp, T>,

source§

fn adapt_into_using<M>(self, method: M) -> D
where M: TransformMatrix<T>,

Convert the source color to the destination color using the specified method.
source§

fn adapt_into(self) -> D

Convert the source color to the destination color using the bradford method by default.
source§

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

source§

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
source§

impl<T, C> ArraysFrom<C> for T
where C: IntoArrays<T>,

source§

fn arrays_from(colors: C) -> T

Cast a collection of colors into a collection of arrays.
source§

impl<T, C> ArraysInto<C> for T
where C: FromArrays<T>,

source§

fn arrays_into(self) -> C

Cast this collection of arrays into a collection of colors.
source§

impl<T> Borrow<T> for T
where T: ?Sized,

source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
source§

impl<T> BorrowMut<T> for T
where T: ?Sized,

source§

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

Mutably borrows from an owned value. Read more
source§

impl<WpParam, T, U> Cam16IntoUnclamped<WpParam, T> for U
where T: FromCam16Unclamped<WpParam, U>,

§

type Scalar = <T as FromCam16Unclamped<WpParam, U>>::Scalar

The number type that’s used in parameters when converting.
source§

fn cam16_into_unclamped( self, parameters: BakedParameters<WpParam, <U as Cam16IntoUnclamped<WpParam, T>>::Scalar> ) -> T

Converts self into C, using the provided parameters.
source§

impl<T, C> ComponentsFrom<C> for T
where C: IntoComponents<T>,

source§

fn components_from(colors: C) -> T

Cast a collection of colors into a collection of color components.
§

impl<T> Downcast<T> for T

§

fn downcast(&self) -> &T

§

impl<T> Downcast for T
where T: Any,

§

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.
§

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.
§

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.
§

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.
source§

impl<T> From<T> for T

source§

fn from(t: T) -> T

Returns the argument unchanged.

source§

impl<T> FromAngle<T> for T

source§

fn from_angle(angle: T) -> T

Performs a conversion from angle.
source§

impl<T, U> FromStimulus<U> for T
where U: IntoStimulus<T>,

source§

fn from_stimulus(other: U) -> T

Converts other into Self, while performing the appropriate scaling, rounding and clamping.
§

impl<T> Instrument for T

§

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

Instruments this type with the provided [Span], returning an Instrumented wrapper. Read more
§

fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
source§

impl<T, U> Into<U> for T
where U: From<T>,

source§

fn into(self) -> U

Calls U::from(self).

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

source§

impl<T, U> IntoAngle<U> for T
where U: FromAngle<T>,

source§

fn into_angle(self) -> U

Performs a conversion into T.
source§

impl<WpParam, T, U> IntoCam16Unclamped<WpParam, T> for U
where T: Cam16FromUnclamped<WpParam, U>,

§

type Scalar = <T as Cam16FromUnclamped<WpParam, U>>::Scalar

The number type that’s used in parameters when converting.
source§

fn into_cam16_unclamped( self, parameters: BakedParameters<WpParam, <U as IntoCam16Unclamped<WpParam, T>>::Scalar> ) -> T

Converts self into C, using the provided parameters.
source§

impl<T, U> IntoColor<U> for T
where U: FromColor<T>,

source§

fn into_color(self) -> U

Convert into T with values clamped to the color defined bounds Read more
source§

impl<T, U> IntoColorUnclamped<U> for T
where U: FromColorUnclamped<T>,

source§

fn into_color_unclamped(self) -> U

Convert into T. The resulting color might be invalid in its color space Read more
source§

impl<T> IntoEither for T

source§

fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
source§

fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
source§

impl<T> IntoStimulus<T> for T

source§

fn into_stimulus(self) -> T

Converts self into T, while performing the appropriate scaling, rounding and clamping.
§

impl<T> Pointable for T

§

const ALIGN: usize = _

The alignment of pointer.
§

type Init = T

The type for initializers.
§

unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
§

unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
§

unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
§

unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
source§

impl<T> Same for T

§

type Output = T

Should always be Self
source§

impl<T, C> TryComponentsInto<C> for T
where C: TryFromComponents<T>,

§

type Error = <C as TryFromComponents<T>>::Error

The error for when try_into_colors fails to cast.
source§

fn try_components_into(self) -> Result<C, <T as TryComponentsInto<C>>::Error>

Try to cast this collection of color components into a collection of colors. Read more
source§

impl<T, U> TryFrom<U> for T
where U: Into<T>,

§

type Error = Infallible

The type returned in the event of a conversion error.
source§

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
source§

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

§

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

The type returned in the event of a conversion error.
source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
source§

impl<T, U> TryIntoColor<U> for T
where U: TryFromColor<T>,

source§

fn try_into_color(self) -> Result<U, OutOfBounds<U>>

Convert into T, returning ok if the color is inside of its defined range, otherwise an OutOfBounds error is returned which contains the unclamped color. Read more
source§

impl<C, U> UintsFrom<C> for U
where C: IntoUints<U>,

source§

fn uints_from(colors: C) -> U

Cast a collection of colors into a collection of unsigned integers.
source§

impl<C, U> UintsInto<C> for U
where C: FromUints<U>,

source§

fn uints_into(self) -> C

Cast this collection of unsigned integers into a collection of colors.
§

impl<T> Upcast<T> for T

§

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

§

impl<V, T> VZip<V> for T
where V: MultiLane<T>,

§

fn vzip(self) -> V

§

impl<T> WithSubscriber for T

§

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
§

fn with_current_subscriber(self) -> WithDispatch<Self>

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