Struct freya::prelude::ScopeId

pub struct ScopeId(pub usize);
Expand description

A component’s unique identifier.

ScopeId is a usize that acts a key for the internal slab of Scopes. This means that the key is not unqiue across time. We do try and guarantee that between calls to wait_for_work, no ScopeIds will be recycled in order to give time for any logic that relies on these IDs to properly update.

Tuple Fields§

§0: usize

Implementations§

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impl ScopeId

pub fn owner<S>(self) -> Owner<S>
where S: AnyStorage,

Get the owner for the current scope.

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impl ScopeId

pub fn current_scope_id(self) -> Option<ScopeId>

Get the current scope id

pub fn consume_context<T>(self) -> Option<T>
where T: 'static + Clone,

Consume context from the current scope

pub fn consume_context_from_scope<T>(self, scope_id: ScopeId) -> Option<T>
where T: 'static + Clone,

Consume context from the current scope

pub fn has_context<T>(self) -> Option<T>
where T: 'static + Clone,

Check if the current scope has a context

pub fn provide_context<T>(self, value: T) -> T
where T: 'static + Clone,

Provide context to the current scope

pub fn suspend(self, task: Task) -> Option<Option<VNode>>

Suspended a component on a specific task and then return None

pub fn push_future( self, fut: impl Future<Output = ()> + 'static ) -> Option<Task>

Pushes the future onto the poll queue to be polled after the component renders.

pub fn spawn(self, fut: impl Future<Output = ()> + 'static)

Spawns the future but does not return the [TaskId]

pub fn generation(self) -> Option<usize>

Get the current render since the inception of this component

This can be used as a helpful diagnostic when debugging hooks/renders, etc

pub fn parent_scope(self) -> Option<ScopeId>

Get the parent of the current scope if it exists

pub fn needs_update(self)

Mark the current scope as dirty, causing it to re-render

pub fn schedule_update(&self) -> Arc<dyn Fn() + Sync + Send>

Create a subscription that schedules a future render for the reference component. Unlike Self::needs_update, this function will work outside of the dioxus runtime.

§Notice: you should prefer using [dioxus_core::schedule_update_any] and [Self::scope_id]

pub fn height(self) -> u32

Get the height of the current scope

pub fn in_runtime<T>(self, f: impl FnOnce() -> T) -> T

Run a closure inside of scope’s runtime

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impl ScopeId

pub const ROOT: ScopeId = _

The root ScopeId.

This scope will last for the entire duration of your app, making it convenient for long-lived state that is created dynamically somewhere down the component tree.

§Example
use dioxus_signals::*;
let my_persistent_state = Signal::new_in_scope(ScopeId::ROOT, String::new());

Trait Implementations§

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impl Clone for ScopeId

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fn clone(&self) -> ScopeId

Returns a copy of the value. Read more
1.0.0 · source§

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

Performs copy-assignment from source. Read more
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impl Debug for ScopeId

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

Formats the value using the given formatter. Read more
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impl<'de> Deserialize<'de> for ScopeId

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fn deserialize<__D>( __deserializer: __D ) -> Result<ScopeId, <__D as Deserializer<'de>>::Error>
where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
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impl Hash for ScopeId

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fn hash<__H>(&self, state: &mut __H)
where __H: Hasher,

Feeds this value into the given Hasher. Read more
1.3.0 · source§

fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl Ord for ScopeId

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fn cmp(&self, other: &ScopeId) -> Ordering

This method returns an Ordering between self and other. Read more
1.21.0 · source§

fn max(self, other: Self) -> Self
where Self: Sized,

Compares and returns the maximum of two values. Read more
1.21.0 · source§

fn min(self, other: Self) -> Self
where Self: Sized,

Compares and returns the minimum of two values. Read more
1.50.0 · source§

fn clamp(self, min: Self, max: Self) -> Self
where Self: Sized + PartialOrd,

Restrict a value to a certain interval. Read more
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impl PartialEq for ScopeId

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fn eq(&self, other: &ScopeId) -> bool

This method tests for self and other values to be equal, and is used by ==.
1.0.0 · source§

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl PartialOrd for ScopeId

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fn partial_cmp(&self, other: &ScopeId) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
1.0.0 · source§

fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator. Read more
1.0.0 · source§

fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
1.0.0 · source§

fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator. Read more
1.0.0 · source§

fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
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impl Serialize for ScopeId

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fn serialize<__S>( &self, __serializer: __S ) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error>
where __S: Serializer,

Serialize this value into the given Serde serializer. Read more
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impl Copy for ScopeId

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impl Eq for ScopeId

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impl StructuralPartialEq for ScopeId

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fn get_hash<H, B>(value: &H, build_hasher: &B) -> u64
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fn compare(&self, key: &K) -> Ordering

Compare self to key and return their ordering.
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