Scoping State (Injections)
Scoping state may be achieved via the combination of a RearchConsumer in conjunction
with a new InheritedWidget.
However, since that results in a ton of boilerplate,
ReArch comes with a builtin RearchInjection widget that "injects" state into the widget tree:
/// Provides the current count to descendants in the [Widget] tree.
class CountInjection extends RearchInjection<CountInjection, ValueWrapper<int>> {
const CountInjection({required super.child, super.key});
@override
ValueWrapper<int> build(BuildContext context, WidgetHandle use) {
return use.data(0);
}
static ValueWrapper<int> of(BuildContext context) =>
RearchInjection.of<CountInjection, ValueWrapper<int>>(context);
static ValueWrapper<int>? maybeOf(BuildContext context) =>
RearchInjection.maybeOf<CountInjection, ValueWrapper<int>>(context);
}
const SomeWidget(
child: CountInjection(
child: Builder(
builder: (context) {
final count = CountInjection.of(context);
return Text('${count.value}');
},
),
),
)