CustomValueNotifier<T> class

Sometimes you want a ValueNotifier where you can control when its listeners are notified. With the CustomValueNotifier you can do this: If you pass CustomNotifierMode.always for the mode parameter, notifierListeners will be called everytime you assign a value to the value property independent of if the value is different from the previous one. If you pass CustomNotifierMode.manual for the mode parameter, notifierListeners will not be called when you assign a value to the value property. You have to call it manually to notify the Listeners. Aditionally it has a listenerCount property that tells you how many listeners are currently listening to the notifier.

Inheritance

• Object
• ChangeNotifier
• CustomValueNotifier

Implemented types

• ValueListenable<T>

Available Extensions

• FunctionaListener

Constructors

CustomValueNotifier(T initialValue, {CustomNotifierMode mode = CustomNotifierMode.normal, bool asyncNotification = false})

Properties

asyncNotification → bool

If true, the listeners will be notified asynchronously, which can be helpful if you encounter problems that you trigger rebuilds during the build phase.

final

hashCode → int

The hash code for this object.

no setter, inherited

hasListeners → bool

Whether any listeners are currently registered.

no setter, inherited

listenerCount ↔ int

getter/setter pair

mode → CustomNotifierMode

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

value ↔ T

The current value of the object. When the value changes, the callbacks registered with addListener will be invoked.

getter/setter pair, override-getter

Methods

addListener(void listener()) → void

Register a closure to be called when the object changes.

override

dispose() → void

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).

override

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

notifyListeners() → void

Call all the registered listeners.

override

removeListener(void listener()) → void

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

override

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited