Must Have 코드팩토리의 플러터 프로그래밍 - 10 ~ 11

// lib/main.dart
import 'package:blog_web_app/screen/home_screen.dart';
import 'package:flutter/material.dart';

void main() {
  runApp(
    MaterialApp(
      home: HomeScreen(),
    ),
  );
}

// lib/screen/home_screen.dart
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';

class HomeScreen extends StatefulWidget {
  const HomeScreen({super.key});

  @override
  State<HomeScreen> createState() => _HomeScreenState();
}

class _HomeScreenState extends State<HomeScreen> {
  DateTime firstDay = DateTime.now();

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Colors.pink[100],
      body: SafeArea(
        top: true,
        child: Column(
          mainAxisAlignment: MainAxisAlignment.spaceBetween,
          crossAxisAlignment: CrossAxisAlignment.stretch,
          children: [
            _DDay(
              firstDay: firstDay,
              onHeartPressed: onHeartPressed,
            ),
            _CoupleImage(),
          ],
        ),
      ),
    );
  }

  void onHeartPressed() {
    showCupertinoDialog(
      context: context,
      builder: (context) {
        return Align(
          alignment: Alignment.bottomCenter,
          child: Container(
            color: Colors.white,
            height: 300,
            child: CupertinoDatePicker(
              mode: CupertinoDatePickerMode.date,
              onDateTimeChanged: (DateTime date) {
                setState(() {
                  firstDay = date;
                });
              },
            ),
          ),
        );
      },
      barrierDismissible: true,
    );
  }
}

class _DDay extends StatelessWidget {
  final DateTime firstDay;
  final GestureTapCallback onHeartPressed;

  const _DDay(
      {super.key, required this.firstDay, required this.onHeartPressed});

  @override
  Widget build(BuildContext context) {
    final textTheme = Theme.of(context).textTheme;
    final now = DateTime.now();

    return Column(
      children: [
        SizedBox(height: 16),
        Text(
          'U&I',
          style: textTheme.headline1,
        ),
        SizedBox(height: 16),
        Text(
          '우리 처음 만난 날',
          style: textTheme.bodyText1,
        ),
        Text(
          '${firstDay.year}.${firstDay.month}.${firstDay.day}',
          style: textTheme.bodyText2,
        ),
        SizedBox(height: 16),
        IconButton(
          iconSize: 60.0,
          icon: Icon(
            Icons.favorite,
            color: Colors.red,
          ),
          onPressed: onHeartPressed,
        ),
        SizedBox(height: 16),
        Text(
          'D+${DateTime(now.year, now.month, now.day).difference(firstDay).inDays + 1}',
          style: textTheme.headline2,
        ),
      ],
    );
  }
}

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

  @override
  Widget build(BuildContext context) {
    return Expanded(
      child: Center(
        child: Image.asset(
          'asset/image/middle_image.png',
          height: MediaQuery.of(context).size.height / 2,
        ),
      ),
    );
  }
}

// lib/main.dart
import 'package:flutter/material.dart';
import 'package:random_dice/const/colors.dart';
import 'package:random_dice/screen/root_screen.dart';

void main() {
  runApp(
    MaterialApp(
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        scaffoldBackgroundColor: backgroundColor,
        sliderTheme: SliderThemeData(
          thumbColor: primaryColor,
          activeTrackColor: primaryColor,
          inactiveTrackColor: primaryColor.withOpacity(0.3),
        ),
        bottomNavigationBarTheme: BottomNavigationBarThemeData(
          selectedItemColor: primaryColor,
          unselectedItemColor: secondaryColor,
          backgroundColor: backgroundColor,
        ),
      ),
      home: RootScreen(),
    ),
  );
}

// lib/screen/home_screen.dart
import 'package:random_dice/const/colors.dart';
import 'package:flutter/material.dart';

class HomeScreen extends StatelessWidget {
  final int number;

  const HomeScreen({
    required this.number,
    Key? key,
  }) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Column(
      mainAxisAlignment: MainAxisAlignment.center,
      children: [
        Center(
          child: Image.asset('asset/image/$number.png'),
        ),
        SizedBox(height: 32.0),
        Text(
          '행운의 숫자',
          style: TextStyle(
            color: secondaryColor,
            fontSize: 20.0,
            fontWeight: FontWeight.w700,
          ),
        ),
        SizedBox(height: 12.0),
        Text(
          number.toString(),
          style: TextStyle(
            color: primaryColor,
            fontSize: 60.0,
            fontWeight: FontWeight.w200,
          ),
        ),
      ],
    );
  }
}

// lib/screen/root_screen.dart
import 'package:flutter/material.dart';
import 'package:random_dice/screen/home_screen.dart';
import 'package:random_dice/screen/settings_screen.dart';
import 'dart:math';
import 'package:shake/shake.dart';

class RootScreen extends StatefulWidget {
  const RootScreen({Key? key}) : super(key: key);

  @override
  State<RootScreen> createState() => _RootScreenState();
}

class _RootScreenState extends State<RootScreen> with TickerProviderStateMixin {
  TabController? controller;
  double threshold = 2.7;
  int number = 1;
  ShakeDetector? shakeDetector;

  @override
  void initState() {
    super.initState();

    controller = TabController(length: 2, vsync: this);

    controller!.addListener(tabListener);
    shakeDetector = ShakeDetector.autoStart(
      shakeSlopTimeMS: 100,
      shakeThresholdGravity: threshold,
      onPhoneShake: onPhoneShake,
    );
  }

  void onPhoneShake() {
    final rand = new Random();

    setState(() {
      number = rand.nextInt(5) + 1;
    });
  }

  tabListener() {
    setState(() {});
  }

  @override
  dispose() {
    controller!.removeListener(tabListener);
    shakeDetector!.stopListening();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: TabBarView(
        controller: controller,
        children: renderChildren(),
      ),
      bottomNavigationBar: renderBottomNavigation(),
    );
  }

  List<Widget> renderChildren() {
    return [
      HomeScreen(number: number),
      SettingsScreen(
        threshold: threshold,
        onThresholdChange: onThresholdChange,
      ),
    ];
  }

  void onThresholdChange(double val) {
    setState(() {
      threshold = val;
    });
  }

  BottomNavigationBar renderBottomNavigation() {
    return BottomNavigationBar(
      currentIndex: controller!.index,
      onTap: (int index) {
        setState(() {
          controller!.animateTo(index);
        });
      },
      items: [
        BottomNavigationBarItem(
          icon: Icon(
            Icons.edgesensor_high_outlined,
          ),
          label: '주사위',
        ),
        BottomNavigationBarItem(
          icon: Icon(
            Icons.settings,
          ),
          label: '설정',
        ),
      ],
    );
  }
}

// lib/screen/setting_screen.dart
import 'package:random_dice/const/colors.dart';
import 'package:flutter/material.dart';

class SettingsScreen extends StatelessWidget {
  final double threshold;

  final ValueChanged<double> onThresholdChange;

  const SettingsScreen({
    Key? key,
    required this.threshold,
    required this.onThresholdChange,
  }) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Column(
      mainAxisAlignment: MainAxisAlignment.center,
      children: [
        Padding(
          padding: const EdgeInsets.only(left: 20.0),
          child: Row(
            children: [
              Text(
                '민감도',
                style: TextStyle(
                  color: secondaryColor,
                  fontSize: 20.0,
                  fontWeight: FontWeight.w700,
                ),
              ),
            ],
          ),
        ),
        Slider(
          min: 0.1,
          max: 10.0,
          divisions: 101,
          value: threshold,
          onChanged: onThresholdChange,
          label: threshold.toStringAsFixed(1),
        ),
      ],
    );
  }
}