Struct iced::Subscription
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§
§impl<Message> Subscription<Message>
impl<Message> Subscription<Message>
pub fn none() -> Subscription<Message>
pub fn none() -> Subscription<Message>
Returns an empty Subscription
that will not produce any output.
pub fn from_recipe(
recipe: impl Recipe<Output = Message> + 'static
) -> Subscription<Message>
pub fn from_recipe( recipe: impl Recipe<Output = Message> + 'static ) -> Subscription<Message>
Creates a Subscription
from a Recipe
describing it.
pub fn batch(
subscriptions: impl IntoIterator<Item = Subscription<Message>>
) -> Subscription<Message>
pub fn batch( subscriptions: impl IntoIterator<Item = Subscription<Message>> ) -> Subscription<Message>
Batches all the provided subscriptions and returns the resulting
Subscription
.
pub fn into_recipes(
self
) -> Vec<Box<dyn Recipe<Output = Message> + 'static, Global>, Global>
pub fn into_recipes( self ) -> Vec<Box<dyn Recipe<Output = Message> + 'static, Global>, Global>
Returns the different recipes of the Subscription
.
pub fn with<T>(self, value: T) -> Subscription<(T, Message)>where
Message: 'static,
T: Hash + Clone + Send + Sync + 'static,
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
.
pub fn map<A>(self, f: fn(_: Message) -> A) -> Subscription<A>where
Message: 'static,
A: 'static,
pub fn map<A>(self, f: fn(_: Message) -> A) -> Subscription<A>where Message: 'static, A: 'static,
Transforms the Subscription
output with the given function.
Trait Implementations§
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>
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