StateObserver class abstract

An object that observes state changes.

If there are multiple BinderScopes. All Observers between the logic and the scope where the state is saved, are called.

For example, in the following snippet, observers b and a, are called when the logic l updates changes.

BinderScope(
  observers: [a],
  child: BinderScope(
    overrides: [l.overrideWithSelf()],
    observers: [b],
  ),
);

Implementers

• DelegatingStateObserver

Constructors

StateObserver()

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

didChanged<T>(StateRef<T> ref, T oldState, T newState, Object? action) → bool

Called when a state changed. This method must return true if the changes have been handled and other observers must no be called, or false if other observers can be called.

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited