how to display the value that came from valueNotifier? - flutter

Question

I have a valueNotifier that generates a list of events and takes a random string every 5 seconds and sends it to the screen. It lies in inheritedWidget. How can I display in the ListView the event that came with the valueNotifier? What is the correct way to print the answer?
My code:
class EventList extends StatelessWidget {
const EventList({Key? key}) : super(key: key);
#override
Widget build(BuildContext context) {
return EventInherited(
child: EventListScreen(),
);
}
}
class EventListScreen extends StatefulWidget {
const EventListScreen({Key? key}) : super(key: key);
#override
State<EventListScreen> createState() => _EventListScreenState();
}
class _EventListScreenState extends State<EventListScreen> {
#override
Widget build(BuildContext context) {
final eventNotifier = EventInherited.of(context).eventNotifier;
return Scaffold(
appBar: AppBar(
title: const Text('Event List'),
centerTitle: true,
),
body: Container(
padding: const EdgeInsets.all(30),
child: ValueListenableBuilder(
valueListenable: eventNotifier,
builder: (BuildContext context, List<String> value, Widget? child) {
return ListView(
children: [
],
);
},
),
),
);
}
}
class EventNotifier extends ValueNotifier<List<String>> {
EventNotifier(List<String> value) : super(value);
final List<String> events = ['add', 'delete', 'edit'];
final stream = Stream.periodic(const Duration(seconds: 5));
late final streamSub = stream.listen((event) {
value.add(
events[Random().nextInt(4)],
);
});
}
class EventInherited extends InheritedWidget {
final EventNotifier eventNotifier = EventNotifier([]);
EventInherited({required Widget child}) : super(child: child);
static EventInherited of(BuildContext context) {
return context.dependOnInheritedWidgetOfExactType()!;
}
#override
bool updateShouldNotify(EventInherited oldWidget) {
return oldWidget.eventNotifier.streamSub != eventNotifier.streamSub;
}
}

Answer 1

If you have correct value, you can return listview like this:
return ListView.builder(
itemCount: value.length,
itemBuilder: (context, index) {
return Text(value[index]);
},
);

Answer 2

After having a quick look at ValueNotifier,
It says the following:
When the value is replaced with something that is not equal to the old value as evaluated by the equality operator ==, this class notifies its listeners.
In your case, the value is an array. By adding items to the array, it wont recognise a change.
Also see other Stacko post.
Try something like:
value = [...value].add(...)