flock 0.7.1

Coordinate Flutter widgets' states with event sourcing. What if Redux store contains no reducers, no state but only actions?

flock

Coordinate Flutter widgets' states with event sourcing.

Inspired by Redux.

Design

Usage

import 'package:flock/flock.dart';

// Events
class E {}

class Minus extends E {
  Minus(this.value);

  final String value;
}

class Add extends E {
  Add(this.v);

  final int v;
}

// Store
final store = createStore();

// In you widget:
class BW extends StatelessWidget {
  int sum(int prev, Iterable<E> events, Projectable store) {
    var result = prev ?? 0;
    for (var event in events) {
      if (event is Add)
        result += event.v;
      else if (event is Minus)
        result -= int.tryParse(event.value) ?? 0;
    }
    return result;
  }

  @override
  Widget build(BuildContext context) {
    return StoreBuilder( 
      builder: (BuildContext context, int p) => Text(
            '$p',
            textDirection: TextDirection.ltr,
          ),
      store: store, // use store from wherever you like
      projector: sum
    );
  }
}

Limits

This is still an early WIP. The future plan includes:

• better Flutter integration
• serialization & time travel support

License

MIT