StateSignalListener<T> class

Rebuilds its child whenever a StateSignal changes.

This component removes the need to manually call:

signal.listen((_) => setState(() {}));

Instead, put the signal-dependent UI inside this listener:

StateSignalListener(answers, (items) {
  return Column(
    children: [
      for (final item in items) AnswerCard(item),
    ],
  );
});

Inheritance

Constructors

StateSignalListener(StateSignal<T> signal, StateSignalBuilder<T> builder): Creates a component that rebuilds when signal changes.

builder ↔ StateSignalBuilder<T>: getter/setter pair
hashCode → int: The hash code for this object.
no setterinherited
preserveState → bool: Whether Flint should preserve this component instance across parent rerenders when the runtime type and tree position match.
no setterinherited
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited
signal ↔ StateSignal<T>: getter/setter pair

attach(void scheduleRender()) → void: Attaches the render scheduler used by setState.
inherited
build() → View?: Builds this component's renderable output.
override
didMount() → void: Called after the component is first mounted in the browser.
override
didUpdate() → void: Called after the component updates following a rerender.
override
noSuchMethod(Invocation invocation) → dynamic: Invoked when a nonexistent method or property is accessed.
inherited
setState(FlintStateUpdater update, {bool render = true}) → void: Applies update and schedules this component to render again.
inherited
shouldUpdate(covariant FlintComponent next) → bool: Whether this component should rerender when it is updated from a new instance in the parent tree.
inherited
toString() → String: A string representation of this object.
inherited
updateFrom(covariant StateSignalListener<T> next) → void: Receives the next component instance when Flint preserves this instance.
override
willUnmount() → void: Called before the component is removed from the tree.
override