MVC

main.dart

abstract class State {}
abstract class Model {
  Stream<State> get state;
  void doThis();
  void doThat();
}

class Controller {
  final Model m;
  Controller(this.m) {
    m.state.listen(_redrawUI);
  }
  
  void buttonClick() => m.doThat();
  void sliderMove() => m.doThis();

  void _redrawUI(State event) {
  }
}