Viewmodel class abstract

A Viewmodel encompasses the UI state and business logic for a single UI component.

Providing a Viewmodel should be done using ChangeNotifier.autoDispose(), in rare cases the autoDispose() can be omitted, if the ViewModel should keep its state even when the View is not needed anymore.

Ideally, it shouldn't contain any dependency on UI packages. If state was updated, call notifyListeners(); to tell flutter to rebuild the UI.

Inheritance

Constructors

Viewmodel(Reader reader)

Properties

busy ↔ bool
Helper boolean for busy state.
getter/setter pair
compositeSubscription → CompositeSubscription
A composite subscription useful for adding subscriptions to that should be disposed when the Viewmodel gets disposed.
final
hashCode → int
The hash code for this object.
no setterinherited
hasListeners → bool
Whether any listeners are currently registered.
no setterinherited
reader → Reader
A reference to a Riverpod Reader which can be user for reading dependencies from the Service Layer.
final
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

addListener(VoidCallback listener) → void
Register a closure to be called when the object changes.
inherited
dispose() → void
Discards any resources used by the viewmodel and also disposes all subscriptions in compositeSubscription.
override
init() → Future<void>
This method can be used to initialize the repository asynchronously.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
notifyListeners() → void
Call all the registered listeners.
inherited
removeListener(VoidCallback listener) → void
Remove a previously registered closure from the list of closures that are notified when the object changes.
inherited
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited