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
Implementers
Available extensions

Constructors

WritableComputedImpl(T getter(), void setter(T), {JoltDebugFn? onDebug})
Creates a new writable computed value.
WritableComputedImpl.withPrevious(T getter(T?), void setter(T), {JoltDebugFn? onDebug})
Creates a writable computed value with a getter that receives the previous value.
factory

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
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 Readable<T>, provided by the JoltUtilsStreamExtension 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

call() → T

Available on Readable<T>, provided by the JoltUtilsReadableExtension extension

Gets the current value (callable syntax).
derived<U>(U computed(T value)) → Computed<U>

Available on Readable<T>, provided by the JoltUtilsReadableExtension extension

Creates a computed value derived from this readable.
dispose() → void
Disposes this node and cleans up resources.
inherited
get() → T

Available on Readable<T>, provided by the JoltUtilsReadableExtension extension

Gets the current value.
listen(void onData(T event)?, {Function? onError, void onDone()?, bool? cancelOnError, bool immediately = false}) → StreamSubscription<T>

Available on Readable<T>, provided by the JoltUtilsStreamExtension extension

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 value) → T

Available on Writable<T>, provided by the JoltUtilsWritableExtension extension

Sets the value.
toString() → String
A string representation of this object.
inherited
until(bool predicate(T value)) → Future<T>

Available on ReadableNode<T>, provided by the JoltUtilsUntilExtension extension

Waits until the value satisfies a condition.
untilWhen<U>(U predicate) → Future<T>

Available on ReadableNode<T>, provided by the JoltUtilsUntilExtension extension

Waits until the reactive value equals a specific value.
update(T updater(T value)) → T

Available on Writable<T>, provided by the JoltUtilsWritableExtension extension

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

Operators

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