OnBuilder<T> constructor

OnBuilder<T>({ Key? key, IObservable<T>? listenTo, List<IObservable>? listenToMany, required Widget builder(), SideEffects<T>? sideEffects, ShouldRebuild? shouldRebuild, Object? watch()?, String? debugPrintWhenRebuild, })

Explicitly listenTo one or more injected state and reinvoke its onBuilder callback each time an injected state emits a notification.

For each OnBuilder widget flavor there is method like equivalent:

//Widget-like
OnBuilder(
    listenTo: counter,
    builder: () => Text('${counter.state}'),
),

//Method-like
counter.rebuild(
    () => Text('{counter.state}'),
),
//
//Widget-like
OnBuilder.data(
    listenTo: counter,
    builder: (data) => Text('$data')),
),

//Method-like
counter.rebuild.onData(
    (data) => Text(data),
),

//Widget-like
OnBuilder.all(
    listenTo: counter,
    onIdle: () => Text('onIdle'),
    onWaiting: () => Text('onWaiting'),
    onError: (err, errorRefresh) => Text('onError'),
    onData: (data) => Text('$data'),

)

//Method-like
counter.rebuild.onAll(
    onIdle: () => Text('onIdle'),
    onWaiting: () => Text('onWaiting'),
    onError: (err, errorRefresh) => Text('onError'),
    onData: (data) => Text('$data'),
),
//
//Widget-like
OnBuilder.orElse(
    listenTo: counter,
    onWaiting: () => Text('onWaiting'),
    orElse: (_) => Text('{counter.state}'),

),

//Method-like
counter.rebuild.onOrElse(
    onWaiting: () => Text('onWaiting'),
    orElse: (_) => Text('{counter.state}'),
),

Implementation

OnBuilder({
  Key? key,
  IObservable<T>? listenTo,
  List<IObservable>? listenToMany,
  required Widget Function() builder,
  SideEffects<T>? sideEffects,
  ShouldRebuild? shouldRebuild,
  Object? Function()? watch,
  String? debugPrintWhenRebuild,
})  : assert(listenTo != null || listenToMany != null),
      super(
        key: key,
        observers: (_) => listenTo != null
            ? [listenTo as ReactiveModelImp]
            : listenToMany!.cast<ReactiveModelImp>(),
        builder: (_, __, ___) => builder(),
        sideEffects: sideEffects,
        shouldRebuild: shouldRebuild,
      );