Listenable class abstract interface

An object that can notify listeners when something about it changes.

Used by NotifierBuilder, context.listen, Scope, and any mutable model that wants to broadcast changes without imposing a Stream subscription model on consumers.

Implementers

• FocusNode
• Notifier
• Selectable
• ValueListenable

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

addListener(VoidCallback listener) → void

Registers listener to be called when this object changes.

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

removeListener(VoidCallback listener) → void

Removes a previously-registered listener.

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited