ObserverController class

An interface for observing the behavior of Controller instances.

Constructors

ObserverController()

Properties

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

onChange(BaseController controller, StateChange change) → void

Called whenever a StateChange occurs in any controller A change occurs when a new state is emitted. onChange is called before a controller's state has been updated.

onClose(BaseController controller) → void

Called whenever a Controller is closed. onClose is called just before the Controller is closed and indicates that the particular instance will no longer emit new states.

onCreate(BaseController controller) → void

Called whenever a Controller is instantiated. In many cases, a StateController may be lazily instantiated and onCreate can be used to observe exactly when the StateController instance is created.

onError(BaseController controller, Object error, StackTrace stackTrace) → void

Called whenever an error is thrown in any Controller or StateController. The stackTrace argument may be StackTrace.empty if an error was received without a stack trace.

onEvent(Controller controller, Object? event) → void

Called whenever an event is added to any controller with the given controller and event.

onTransform(Controller controller, TransformController transition) → void

Called whenever a transition occurs in any controller with the given controller and transition. A transition occurs when a new event is added and mapEventToState executed. onTransform is called before a controller's state has been updated.

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited