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Notifications
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main.dart
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main.dart
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import 'package:flutter/material.dart';
import 'package:notification_builder/notification_builder.dart';
void main() {
runApp(const App());
}
class App extends StatelessWidget {
const App({super.key});
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Notification Builder',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: const HomePage(),
);
}
}
class HomePage extends StatelessWidget {
const HomePage({super.key});
@override
Widget build(BuildContext context) {
return Scaffold(
body: NotificationBuilder<ColorNotification>(
builder: (context, notification, child) {
// Use a fallback value like this.
final color = notification?.color ?? Colors.white;
return AnimatedContainer(
duration: const Duration(milliseconds: 200),
curve: Curves.fastOutSlowIn,
decoration: BoxDecoration(color: color),
child: child,
);
},
// Note: it is more efficient to use this `child` parameter for widgets
// that don't depend on notifications.
child: SafeArea(
child: Column(
children: [
const Spacer(),
ColoredBox(
color: Colors.white,
child: Column(
mainAxisAlignment: MainAxisAlignment.end,
mainAxisSize: MainAxisSize.min,
children: [
const SizedBox(height: 12.0),
const Text(
'Tap to change the color using a Notification Builder!',
style: TextStyle(fontSize: 16),
),
const SizedBox(height: 12.0),
Row(
mainAxisAlignment: MainAxisAlignment.center,
children: const [
ChangeColorButton(color: Colors.red, title: 'Red'),
SizedBox(width: 8.0),
ChangeColorButton(color: Colors.green, title: 'Green'),
SizedBox(width: 8.0),
ChangeColorButton(color: Colors.blue, title: 'Blue'),
],
),
const SizedBox(height: 24.0),
],
),
),
],
),
),
),
);
}
}
class ChangeColorButton extends StatelessWidget {
const ChangeColorButton({
Key? key,
required this.title,
required this.color,
}) : super(key: key);
final String title;
final Color color;
@override
Widget build(BuildContext context) {
return MaterialButton(
color: Colors.black,
onPressed: () {
ColorNotification(color).dispatch(context);
},
child: Text(
title,
style: const TextStyle(color: Colors.white),
),
);
}
}
class ColorNotification extends Notification {
const ColorNotification(this.color);
final Color color;
}