UseState<T> class

A ReactterHook that manages a state.

Contains a value of type T which represents the current state.

When value is different to previous state, UseState execute update to notify context of ReactterContext that has changed and in turn executes onWillUpdate and onDidUpdate.

This example produces one simple UseState:

class AppContext extends ReactterContext {
  late final likesCount = UseState(0, this);
  late final followed = UseState(false, this);
  late final text = UseState("", this);
  late final user = UseState<User?>(null, this);
  late final posts = UseState(<Post>[], this);

  AppContext() {
    likesCount.value += 1;
    followed.value = followed.value!;
    text.value = "This is a text";
    user.value = User(name: "name");

    // It's need to force [update] because mantain the previous state
    // and the [context] not aware that this state has changed
    posts.update(() {
      posts.value.add(
          Post(
            user: user.value,
            text: text.value,
          ),
        );
    });
  }
}

See also:

• ReactterContext, a context that contains any logic and allowed react when any change the ReactterHook.

Inheritance

• Object
• ReactterHookManager
• ReactterHook
• UseState

Constructors

UseState(T initial, [ReactterHookManager? context])

Properties

hashCode → int

The hash code for this object.

no setter, inherited

initial ↔ T

The initial value in state.

getter/setter pair

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

value ↔ T

Get current value state

getter/setter pair

Methods

dispose() → void

Called when this object is removed

inherited

listenHooks(List<ReactterHook> hooks) → void

Suscribes to all hooks given.

inherited

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

refresh() → void

Forces update and notifies to listeners that it did update

inherited

reset() → void

Reset the state to initial value

toString() → String

A string representation of this object.

inherited

update([covariant Function? callback]) → void

Executes fnUpdate, and notify the listeners about to update.

inherited

updateAsync([covariant Function? callback]) → Future<void>

Executes fnUpdate, and notify the listeners about to update as async way.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited