FlutterComputed#
Kind:
class |
Package: package:signals_flutter
Class: FlutterComputed#
A read-only reactive signal whose value is automatically computed and cached based on other signals it depends on.
FlutterComputed extends the core Computed signal and implements Flutter's
ValueListenable, making it seamlessly compatible with native Flutter widgets
(like ValueListenableBuilder) and other ecosystem packages.
Example Usage#
final count = signal(2);
final doubled = computed(() => count.value * 2);
print(doubled.value); // 4
count.value = 5;
print(doubled.value); // 10
Custom Signals#
To create a custom signal that behaves like a computed value and implements ValueListenable,
you can extend FlutterComputed directly or mix in ValueListenableSignalMixin.
Members of FlutterComputed#
| Member | Type | Signature | Description |
|---|---|---|---|
| FlutterComputed | constructor |
dart FlutterComputed(super.internalValue, {super.options, @Deprecated('Use options: ComputedOptions(autoDispose: ...) instead') super.autoDispose, @Deprecated('Use options: ComputedOptions(name: ...) instead') super.debugLabel, this.runCallbackOnListen = false})
|
Create a new signal that is computed based on the values of other signals. |
| runCallbackOnListen | field |
dart bool runCallbackOnListen |
References#
The FlutterComputed type is referenced and used in the following pages:
- SignalsMixin (signals_flutter/mixins)
- FlutterComputed (signals_flutter/signals)
- signals_flutter
- SignalsMixin (signals/mixins)
- FlutterComputed (signals/signals)
- signals
- useComputed (signals_hooks/hooks)