WritableComputedImpl<T> class

Implementation of WritableComputed that can be both read and written.

This is the concrete implementation of the WritableComputed interface. WritableComputed allows you to create computed values that can also be set directly. When set, the setter function is called, which typically updates the underlying dependencies.

See WritableComputed for the public interface and usage examples.

Example:

final firstName = Signal('John');
final lastName = Signal('Doe');

final fullName = WritableComputed(
  () => '${firstName.value} ${lastName.value}',
  (value) {
    final parts = value.split(' ');
    firstName.value = parts[0];
    lastName.value = parts[1];
  },
);

print(fullName.value); // "John Doe"
fullName.value = 'Jane Smith'; // Updates firstName and lastName
Inheritance
Implemented types
Available extensions

Constructors

WritableComputedImpl(T getter(), void setter(T), {JoltDebugFn? onDebug})
Creates a new writable computed value.

Properties

deps Link?
First dependency link in the chain.
getter/setter pairinherited
depsTail Link?
Last dependency link in the chain.
getter/setter pairinherited
flags int
Reactive flags for this node.
getter/setter pairinherited
getter → T Function()
finalinherited
hashCode int
The hash code for this object.
no setterinherited
isDisposed bool
Whether this node has been disposed.
no setterinherited
listenable JoltValueListenable<T>

Available on Readonly<T>, provided by the JoltValueListenableExtension extension

Converts this Jolt value to a Flutter ValueListenable.
no setter
notifier JoltValueNotifier<T>

Available on Readonly<T>, provided by the JoltValueNotifierExtension extension

Converts this Jolt value to a Flutter ValueNotifier.
no setter
peek → T
Returns the current computed value without establishing a reactive dependency.
no setterinherited
peekCached → T
Returns the cached computed value without establishing a reactive dependency.
no setterinherited
pendingValue ↔ T?
getter/setter pairinherited
runtimeType Type
A representation of the runtime type of the object.
no setterinherited
setter → void Function(T)
The function called when this computed value is set.
final
stream Stream<T>

Available on ReadonlyNode<T>, provided by the JoltReadonlyExtension extension

Converts this reactive value to a broadcast stream.
no setter
subs Link?
First subscriber link in the chain.
getter/setter pairinherited
subsTail Link?
Last subscriber link in the chain.
getter/setter pairinherited
value ↔ T
Returns the current computed value and establishes a reactive dependency.
getter/setter pairinherited-getteroverride-setter

Methods

dispose() → void
Disposes this node and cleans up resources.
inherited
get() → T
Returns the current computed value and establishes a reactive dependency.
inherited
listen(void onData(T event)?, {Function? onError, void onDone()?, bool? cancelOnError, bool immediately = false}) StreamSubscription<T>

Available on ReadonlyNode<T>, provided by the JoltReadonlyExtension extension

Creates a stream subscription that listens to changes in this reactive value.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
notify() → void
Manually notifies all subscribers that this computed value has changed.
inherited
onDispose() → void
Disposes the computed value and cleans up resources.
inherited
readonly() ReadonlySignal<T>

Available on Signal<T>, provided by the JoltSignalExtension extension

Returns a read-only view of this signal.
readonly() Computed<T>

Available on WritableComputed<T>, provided by the JoltWritableComputedExtension extension

Returns a read-only view of this writable computed.
set(T newValue) → T
Sets a new value for this writable computed by delegating to the user-provided setter inside a batch so downstream watchers flush once.
override
toString() String
A string representation of this object.
inherited
until(bool predicate(T value)) Future<T>

Available on ReadonlyNode<T>, provided by the JoltReadonlyExtension extension

Waits until the reactive value satisfies a predicate condition.
update(T updater(T value)) → T

Available on WritableNode<T>, provided by the JoltWritableExtension extension

Updates the value using an updater function based on the current value.

Operators

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