EnhancedValueNotifier<T> class

A EnhancedChangeNotifier that holds a single value.

When value is replaced with something that is not equal to the old value as evaluated by the equality operator ==, this class notifies its listeners.

Limitations

Because this class only notifies listeners when the value's identity changes, listeners will not be notified when mutable state within the value itself changes.

For example, a EnhancedValueNotifier<List<int>> will not notify its listeners when the contents of the list are changed.

As a result, this class is best used with only immutable data types.

For mutable data types, consider extending EnhancedChangeNotifier directly.

Inheritance
Implemented types
Implementers

Constructors

EnhancedValueNotifier(T _value)
Creates a ChangeNotifier that wraps this value.

Properties

hashCode → int
The hash code for this object.
no setterinherited
hasListeners → bool
Override hasListeners to check if there are any listeners.
no setterinherited
properties → Map<String, dynamic>
A notifying map view for reading and writing property values by name.
no setterinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited
value ↔ T
The current value stored in this notifier.
getter/setter pairoverride-getter

Methods

addListener(Function listener, {Object? target, bool once = false, bool immediate = false}) → void
Register a listener for a specific property target can be an element or elements list like [ property1, property2 ]
inherited
dispose() → void
Override dispose to discards any resources used by the object. After this is called, the object is not in a usable state and should be discarded (calls to addListener will throw after the object is disposed).
inherited
fromMap(Map<String, dynamic> props) → void
Initializes stored values from props without notifying listeners.
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
notifyListeners([String? target]) → void
Notify listeners for a specific element
inherited
removeListener(Function listener) → void
Remove a listener
inherited
toString() → String
Returns a debug description containing this object's identity and value.
override

Operators

operator ==(Object other) → bool
The equality operator.
inherited
operator [](String target) → dynamic
Returns the stored value for target.
inherited
operator []=(String target, dynamic value) → void
Stores value for target and notifies listeners for target.
inherited