SignalValueListenable<T, N extends ValueListenable<T>, S extends ReadonlySignal<T>> class

Signal + ValueListenable

Inheritance
Implemented types
Available extensions

Constructors

SignalValueListenable.new(T val, {String? debugLabel, bool autoDispose = false})
SignalValueListenable from value
factory
SignalValueListenable.fromSignal(S val)
SignalValueListenable from ReadonlySignal
factory
SignalValueListenable.fromValueListenable(N val, {String? debugLabel, bool autoDispose = false})
SignalValueListenable from ValueListenable
factory
SignalValueListenable.merge(N notifier, S source)
Signal + ValueListenable

Properties

autoDispose → bool
Throws and error if read after dispose and can be disposed on last unsubscribe.
no setterinherited
debugLabel → String?
Debug label for Debug Mode
no setterinherited
disposed ↔ bool
Returns true if dispose has been called and will throw and error on value read
getter/setter pairinherited
globalId → int
Global ID of the signal
no setterinherited
hashCode → int
The hash code for this object.
no setterinherited
hasTargets → bool
Check if there are any targets attached
no setterinherited
initialValue → T
Value that the signal was created with
no setterinherited
isInitialized → bool
Check if the signal is lazy and has not had a value set
no setterinherited
notifier → N
Internal value notifier
final
previousValue → T?
Previous value that was set before the current
no setterinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
source → S
Internal source signal
finalinherited
targets → Iterable<SignalListenable>
@internal for testing getter to track all the effects currently effected in the signal
no setterinherited
value → T
Compute the current value
no setterinherited
version → int
Version number is used to track changes and will increment for every set
no setterinherited

Methods

addListener(VoidCallback listener) → void
Register a closure to be called when the object notifies its listeners.
override
call() → T
Return the value when invoked
inherited
dispose() → void
Dispose the signal
override
get() → T
Get the current value
inherited
listen(BuildContext context, void callback(), {String? debugLabel}) → void

Available on ReadonlySignal<T>, provided by the FlutterReadonlySignalUtils extension

Used to listen for updates on a signal but not rebuild the nearest element
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
onDispose(void cleanup()) → EffectCleanup
Add a cleanup function to be called when the signal is disposed
inherited
peek() → T
In the rare instance that you have an effect that should write to another signal based on the previous value, but you don't want the effect to be subscribed to that signal, you can read a signals's previous value via signal.peek().
inherited
removeListener(VoidCallback listener) → void
Remove a previously registered closure from the list of closures that the object notifies.
override
select<R>(R selector(ReadonlySignal<T>), {bool autoDispose = false, String? debugLabel}) → Computed<R>

Available on ReadonlySignal<T>, provided by the ReadonlySignalUtils extension

Select a value and return a computed signal to listen for changes
subscribe(void fn(T value)) → EffectCleanup
Subscribe to value changes
inherited
toJson() → dynamic
Convert value to JSON
inherited
toSignal({String? debugLabel}) → SignalValueListenable<T, ValueListenable<T>, ReadonlySignal<T>>

Available on ValueListenable<T>, provided by the SignalValueListenableUtils extension

SignalValueNotifier
toStream() → Stream<T>

Available on ReadonlySignal<T>, provided by the ReadonlySignalUtils extension

Convert a signal to a Stream to be consumed as a read only stream.
toString() → String
A string representation of this object.
inherited
toValueListenable() → SignalValueListenable<T, ValueListenable<T>, ReadonlySignal<T>>

Available on ReadonlySignal<T>, provided by the FlutterReadonlySignalUtils extension

Convert a signal to ValueListenable to be used in builders and other existing widgets like ValueListenableBuilder
unlisten(BuildContext context, void callback()) → void

Available on ReadonlySignal<T>, provided by the FlutterReadonlySignalUtils extension

Stop subscriptions to updates on a signal for listeners
unwatch(BuildContext context) → void

Available on ReadonlySignal<T>, provided by the FlutterReadonlySignalUtils extension

Stop subscriptions to updates on a signal for watchers
watch(BuildContext context, {String? debugLabel}) → T

Available on ReadonlySignal<T>, provided by the FlutterReadonlySignalUtils extension

Rebuild the Element that the current signal is inside of

Operators

operator ==(Object other) → bool
The equality operator.
inherited