RxEvent<T> class

A fire-and-forget signal: navigation, toasts, "the link was invalid".

Unlike Rx, every emit notifies listeners, even when the emitted value equals the previous one — an event that happens twice is two events.

Consume it from the widget tree with EventListener:

// state
final invalidLink = RxEvent<Object>();

// controller
state.invalidLink.emit(error);

// page
EventListener<Object>(
  event: state.invalidLink,
  listener: (context, _) => Navigator.of(context).pop(),
  child: const MyPage(),
)

Most screens don't need this: when the controller can drive the side effect itself, a routing callback is simpler and keeps the page free of logic.

Inheritance

• Object
• ChangeNotifier
• RxEvent

Implemented types

• ValueListenable<T?>

Constructors

RxEvent()

Creates a RxEvent.

Properties

hashCode → int

The hash code for this object.

no setter, inherited

hasListeners → bool

Whether any listeners are currently registered.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

value → T?

The most recently emitted value, or null before the first emit.

no setter, override

Methods

addListener(VoidCallback listener) → void

Register a closure to be called when the object changes.

inherited

dispose() → void

Discards any resources used by the object.

inherited

emit(T newValue) → void

Notifies listeners with newValue, unconditionally.

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

notifyListeners() → void

Call all the registered listeners.

inherited

removeListener(VoidCallback listener) → void

Remove a previously registered closure from the list of closures that are notified when the object changes.

inherited

toString() → String

Always throws — see Rx.toString.

override

Operators

operator ==(Object other) → bool

The equality operator.

inherited