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import 'dart:async';
import 'package:flutter/material.dart';
void main() {
runApp(const UI());
}
class UI extends StatelessWidget {
const UI({super.key});
@override
Widget build(BuildContext context) {
return const MaterialApp(
home: ContactList(),
);
}
}
class Contact {
final String address;
bool isOpen;
Contact({required this.address, required this.isOpen});
}
class ContactList extends StatefulWidget {
const ContactList({super.key});
@override
State<ContactList> createState() => _ContactListState();
}
class _ContactListState extends State<ContactList> {
late final List<Contact> contacts;
Timer? _timer;
@override
void initState() {
super.initState();
contacts = <Contact>[
Contact(address: "Living Room Window", isOpen: false),
Contact(address: "Front Door", isOpen: true),
Contact(address: "Back Door", isOpen: false),
Contact(address: "Garage Window", isOpen: true),
];
_timer = Timer.periodic(const Duration(seconds: 1), (_) {
setState(() {
contacts[0].isOpen = !contacts[0].isOpen;
});
});
}
@override
void dispose() {
_timer?.cancel();
super.dispose();
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(title: const Text("Contacts")),
body: ListView.builder(
itemCount: contacts.length,
itemBuilder: (BuildContext context, int index) {
final Contact contact = contacts[index];
return ContactTile(contact: contact);
},
),
);
}
}
class ContactTile extends StatelessWidget {
final Contact contact;
const ContactTile({super.key, required this.contact});
@override
Widget build(BuildContext context) {
return ListTile(
leading: Icon(
contact.isOpen ? Icons.meeting_room : Icons.door_front_door,
color: contact.isOpen ? Colors.red : Colors.green,
),
title: Text(contact.address),
);
}
}
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