SimpleClock

SimleClock is a simple package that provides a stream of the current time. You can use this stream to display the current time and date in your Flutter applications. This package is especially useful when you need to update the time displayed in your app in real-time.

Features

• Stream of the current time, updated every second.
• Easy to integrate with Riverpod or use standalone.
• Example usage included.

Getting started

To start using FlutterClock in your project, follow these steps:

1. Add the package to your pubspec.yaml file:

   dependencies:
       simple_clock: <latest_version>

2. Run flutter pub get to install the package.
3. Import the package in your Dart code:

   import 'package:simple_clock/simple_clock.dart';

Usage

• getCurrentTime(): returns the current time in DateTime
• timeStream: is getter which returns the Stream<DateTime>
• dispose(): you also need to use this method to close the stream.

Step by Step usage:

1. Create instance of SimpleClock class & DateTime variable:

   late SimpleClock _simpleclock;
   late DateTime _currentTime;

2. Init the stream in initState() method of StatefulWidget:

     // initialize the clock & stream
   @override
   void initState() {
     super.initState();
     _simpleClock = SimpleClock();
     _currentTime = _simpleClock.getCurrentTime();
     _simpleClock.timeStream.listen((event) {
       setState(() {
         _currentTime = event;
       });
     });
   }

3. Don't forget to dispose the stream in dispose() method:

   @override
   void dispose() {
     _simpleClock.dispose();
     super.dispose();
   }

Standalone Example

Here is a standalone example of using FlutterClock:

import 'package:flutter/material.dart';
import 'package:simple_clock/simple_clock.dart';
import 'package:intl/intl.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Clock Example',
      theme: ThemeData(
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
        useMaterial3: true,
      ),
      home: const MyHomePage(title: 'FlutterClock Example'),
      debugShowCheckedModeBanner: false,
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  late SimpleClock _simpleClock;
  late DateTime _currentTime;

  // initialize the clock & stream
  @override
  void initState() {
    super.initState();
    _simpleClock = SimpleClock();
    _currentTime = _simpleClock.getCurrentTime();
    _simpleClock.timeStream.listen((event) {
      setState(() {
        _currentTime = event;
      });
    });
  }


  @override
  void dispose() {
    _simpleClock.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    final String currentTime = DateFormat('HH:mm:ss').format(_currentTime);
    final String today = DateFormat("yMMMMEEEEd").format(_currentTime);
    return Scaffold(
      appBar: AppBar(
        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
        title: Text(widget.title),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Text(
              currentTime,
              style: Theme.of(context).textTheme.displayLarge,
            ),
            Text(
              today,
              style: Theme.of(context).textTheme.headlineSmall,
            ),
          ],
        ),
      ),
    );
  }
}

Example with Riverpod

For a more advanced usage with Riverpod, refer to the /example_with_riverpod directory in the repository.

1. Define the providers:

   import 'package:simple_clock/simple_clock.dart';
   import 'package:flutter_riverpod/flutter_riverpod.dart';
   
   
   /// Dependency Injection for [SimpleClock], to avoid singleton pattern
   final simpleClockProvider = Provider((ref) => SimpleClock());
   
   /// StremProvider for the [SimpleClock.timeStream]
   final clockProvider = StreamProvider<DateTime>((ref) {
       final clock = ref.watch(flutterClockProvider);
       ref.onDispose(clock.dispose);
       return clock.timeStream;
   });

2. Wrap your app with ProviderScope to use Riverpod Providers:

   void main() {
       runApp(const ProviderScope(child: MyApp()));
   }

3. Watch the provider using ref.watch():

   import 'package:example_with_riverpod/providers/clock_provider.dart';
   import 'package:example_with_riverpod/views/widgets/time_display_widget.dart';
   import 'package:flutter/material.dart';
   import 'package:flutter_riverpod/flutter_riverpod.dart';
   import 'package:intl/intl.dart';
   
   class HomeScreen extends ConsumerWidget {
       const HomeScreen({super.key, required this.title});
       final String title;
   
       @override
       Widget build(BuildContext context, WidgetRef ref) {
           final asyncTime = ref.watch(clockProvider);
   
           return Scaffold(
               appBar: AppBar(
                   backgroundColor: Theme.of(context).colorScheme.inversePrimary,
                   title: Text(title),
               ),
               body: Center(
                   child: asyncTime.when(
                   data: (time) {
                       final formattedTime = DateFormat.Hms().format(time);
                       final formattedDate = DateFormat.yMMMMEEEEd().format(time);
                       return TimeDisplay(context: context, formattedTime: formattedTime, formattedDate: formattedDate);
                   },
                   loading: () {
                       final currentTime = ref.watch(flutterClockProvider).getCurrentTime();
                       final formattedTime = DateFormat.Hms().format(currentTime);
                       final formattedDate = DateFormat.yMMMMEEEEd().format(currentTime);
                       return TimeDisplay(context: context, formattedTime: formattedTime, formattedDate: formattedDate);
                   },
                   error: (error, stack) => Text('Error: $error'),
                   ),
               ),
           );      
       }
   }

4. See full /example_with_riverpod for more complete implementation.

Additional information

• intl package: If you need to format the the time and date, you need to add the intl package to format the time and date.

  dependencies:
      intl: ^0.17.0

• Examples: Check the /example and /example_with_riverpod directories for complete examples on how to use this package in your projects.
• Contributions: Contributions are welcome. Please open an issue or submit a pull request.
• Bugs: If you encounter any bugs, please report them in the issue tracker.

Thank you for using FlutterClock!

License

This project is licensed under the MIT License - see the LICENSE file for details.