flutterx_live_data 2.0.1

Observable data holders inspired by Android LiveData, with lazy activation, mediators, history, storage, observable collections and widget builders.

example/lib/main.dart

import 'package:flutter/material.dart';
import 'package:flutterx_live_data/flutterx_live_data.dart';

void main() => runApp(const ExampleApp());

/// A counter held by a [MutableLiveData], with a parity label derived from it by a transformation.
class ExampleApp extends StatefulWidget {
  /// Creates the example app.
  const ExampleApp({super.key});

  @override
  State<ExampleApp> createState() => _ExampleAppState();
}

class _ExampleAppState extends State<ExampleApp> {
  final _counter = MutableLiveData<int>(value: 0);
  late final _parity = _counter.transform((value) => value.isEven ? 'even' : 'odd');

  @override
  Widget build(BuildContext context) => MaterialApp(
    home: Scaffold(
      body: Center(
        child: LiveDataBuilder<int>(
          data: _counter,
          builder: (context, value) => LiveDataBuilder<String>(
            data: _parity,
            builder: (context, parity) => Text('$value is $parity'),
          ),
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: () => _counter.value++,
        child: const Icon(Icons.add),
      ),
    ),
  );
}