Struct vizia::binding::Binding

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pub struct Binding<L>
where L: Lens,
{ /* private fields */ }
Expand description

A view with a binding which rebuilds its contents when the observed data changes.

This view is typically used to switch between two or more views when the bound data changes. The binding view will destroy and then recreate its contents whenever the bound data changes, so it is usually preferable to bind a view directly to the data (if supported) or to bind to a view modifier, which will update the properties of a view without rebuilding it.

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impl<L> Binding<L>
where L: 'static + Lens, <L as Lens>::Source: 'static, <L as Lens>::Target: Data,

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pub fn new<F>(cx: &mut Context, lens: L, builder: F)
where F: 'static + Fn(&mut Context, L),

Creates a new binding view.

A binding view observes application data through a lens and rebuilds its contents if the data changes.

§Example

When the value of AppData::some_data changes, the label inside of the binding will be rebuilt.

Binding::new(cx, AppData::some_data, |cx, lens|{
    // Retrieve the data from context
    let value = *lens.get(cx);
    Label::new(cx, value.to_string());
});

Auto Trait Implementations§

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impl<L> Freeze for Binding<L>
where L: Freeze,

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impl<L> !RefUnwindSafe for Binding<L>

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impl<L> !Send for Binding<L>

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impl<L> !Sync for Binding<L>

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impl<L> Unpin for Binding<L>
where L: Unpin,

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impl<L> !UnwindSafe for Binding<L>

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<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> 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, 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> 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