idle_flutter 0.1.1

A Flutter binding layer for idle/incremental games built on idle_core and idle_save

example/main.dart

import 'package:flutter/material.dart';
import 'package:idle_core/idle_core.dart';
import 'package:idle_flutter/idle_flutter.dart';
import 'package:idle_save/idle_save.dart';

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

class GameState extends IdleState {
  final int gold;
  final int rate;

  const GameState({required this.gold, required this.rate});

  GameState copyWith({int? gold, int? rate}) =>
      GameState(gold: gold ?? this.gold, rate: rate ?? this.rate);

  @override
  Map<String, dynamic> toJson() => {'gold': gold, 'rate': rate};

  static GameState fromJson(Map<String, dynamic> json) => GameState(
    gold: json['gold'] as int? ?? 0,
    rate: json['rate'] as int? ?? 1,
  );
}

class UpgradeRate extends IdleAction {
  final int delta;
  const UpgradeRate(this.delta);
}

GameState reducer(GameState state, IdleAction action) {
  if (action is IdleTickAction) {
    return state.copyWith(gold: state.gold + state.rate);
  }
  if (action is UpgradeRate) {
    return state.copyWith(rate: state.rate + action.delta);
  }
  return state;
}

class MyApp extends StatefulWidget {
  const MyApp({super.key});
  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  late final IdleFlutterController<GameState> controller;

  @override
  void initState() {
    super.initState();
    final store = SharedPreferencesStore('idle_demo_save');

    controller = IdleFlutterController<GameState>(
      config: IdleConfig<GameState>(
        dtMs: 1000,
        maxOfflineMs: 24 * 60 * 60 * 1000,
        maxTicksTotal: 10_000,
      ),
      reducer: reducer,
      initialState: const GameState(gold: 0, rate: 1),
      stateDecoder: GameState.fromJson,
      store: store,
      migrator: Migrator(latestVersion: 1),
      autosaveDebounce: const Duration(milliseconds: 500),
    );
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(title: const Text('idle_flutter example')),
        body: IdleControllerHost<GameState>(
          controller: controller,
          loading: const Center(child: CircularProgressIndicator()),
          rebuildOnChange: false,
          builder: (context, c) {
            return Center(
              child: Column(
                mainAxisSize: MainAxisSize.min,
                children: [
                  IdleSelector<GameState, int>(
                    controller: c,
                    selector: (c) => c.state.gold,
                    builder: (context, gold, c) {
                      return Text(
                        'Gold: $gold',
                        style: const TextStyle(fontSize: 28),
                      );
                    },
                  ),
                  const SizedBox(height: 8),
                  IdleSelector<GameState, int>(
                    controller: c,
                    selector: (c) => c.state.rate,
                    builder: (context, rate, c) {
                      return Text('Rate: $rate/sec');
                    },
                  ),
                  const SizedBox(height: 16),
                  ElevatedButton(
                    onPressed: () => c.dispatch(const UpgradeRate(1)),
                    child: const Text('Upgrade +1 rate'),
                  ),
                  const SizedBox(height: 16),
                  IdleSelector<GameState, int>(
                    controller: c,
                    selector: (c) => c.lastSeenMs,
                    builder: (context, lastSeenMs, c) {
                      return Text('lastSeenMs: $lastSeenMs');
                    },
                  ),
                ],
              ),
            );
          },
        ),
      ),
    );
  }
}