Struct flo_binding::ComputedBinding

pub struct ComputedBinding<Value: 'static + Clone, TFn> where
    TFn: 'static + Fn() -> Value,  { /* fields omitted */ }

Represents a binding to a value that is computed by a function

Methods

impl<Value: 'static + Clone + Send, TFn> ComputedBinding<Value, TFn> where
    TFn: 'static + Send + Sync + Fn() -> Value, 

pub fn new(calculate_value: TFn) -> ComputedBinding<Value, TFn>

Creates a new computable binding

pub fn new_in_context(calculate_value: TFn) -> ComputedBinding<Value, TFn>

Creates a new computable binding within another binding

Normally this is considered an error (if the binding is not held anywhere outside of the context, it will never generate an update). new panics if it's called from within a context for this reason.

If the purpose of a computed binding is to return other bindings, this limitation does not apply, so this call is available

Trait Implementations

impl<Value: 'static + Clone, TFn> Changeable for ComputedBinding<Value, TFn> where
    TFn: 'static + Send + Sync + Fn() -> Value, 

fn when_changed(&self, what: Arc<dyn Notifiable>) -> Box<dyn Releasable>

Supplies a function to be notified when this item is changed

impl<Value: 'static + Clone + Send, TFn> Bound<Value> for ComputedBinding<Value, TFn> where
    TFn: 'static + Send + Sync + Fn() -> Value, 

fn get(&self) -> Value

Retrieves the value stored by this binding

impl<Value: 'static + Clone + PartialEq + Send, TFn> From<ComputedBinding<Value, TFn>> for BindRef<Value> where
    TFn: 'static + Send + Sync + Fn() -> Value, 

fn from(val: ComputedBinding<Value, TFn>) -> Self

Performs the conversion.

impl<'a, Value: 'static + Clone + PartialEq + Send, TFn> From<&'a ComputedBinding<Value, TFn>> for BindRef<Value> where
    TFn: 'static + Send + Sync + Fn() -> Value, 

fn from(val: &'a ComputedBinding<Value, TFn>) -> Self

Performs the conversion.

impl<Value: 'static + Clone + Send, TFn> Clone for ComputedBinding<Value, TFn> where
    TFn: 'static + Send + Sync + Fn() -> Value, 

fn clone(&self) -> Self

Returns a copy of the value.

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

Performs copy-assignment from source.