import 'package:flutter/material.dart'; import 'package:habit_tracker_app/screens/home_screen.dart'; void main() { runApp(const MyApp()); } class MyApp extends StatelessWidget { const MyApp({super.key}); @override Widget build(BuildContext context) { return MaterialApp( title: 'Habit Tracker', theme: ThemeData( colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple), useMaterial3: true, ), home: const HomeScreen(), debugShowCheckedModeBanner: false, ); } } class Habit { final String id; final String title; final String description; final int targetDays; final List completedDates; Habit({ required this.id, required this.title, required this.description, required this.targetDays, List? completedDates, }) : completedDates = completedDates ?? []; Habit copyWith({ String? id, String? title, String? description, int? targetDays, List? completedDates, }) { return Habit( id: id ?? this.id, title: title ?? this.title, description: description ?? this.description, targetDays: targetDays ?? this.targetDays, completedDates: completedDates ?? this.completedDates, ); } double get progress { if (targetDays == 0) return 0; return completedDates.length / targetDays; } bool isCompletedToday() { final now = DateTime.now(); return completedDates.any((date) => date.year == now.year && date.month == now.month && date.day == now.day); } } import 'package:flutter/material.dart'; import 'package:habit_tracker_app/models/habit.dart'; import 'package:habit_tracker_app/widgets/habit_card.dart'; import 'package:habit_tracker_app/widgets/add_habit_dialog.dart'; class HomeScreen extends StatefulWidget { const HomeScreen({super.key}); @override State createState() => _HomeScreenState(); } class _HomeScreenState extends State { final List _habits = []; void _addHabit(String title, String description, int targetDays) { setState(() { _habits.add(Habit( id: DateTime.now().toString(), title: title, description: description, targetDays: targetDays, )); }); } void _toggleHabitCompletion(Habit habit) { setState(() { final now = DateTime.now(); if (habit.isCompletedToday()) { habit.completedDates.removeWhere((date) => date.year == now.year && date.month == now.month && date.day == now.day); } else { habit.completedDates.add(now); } }); } void _deleteHabit(String id) { setState(() { _habits.removeWhere((habit) => habit.id == id); }); } void _showAddHabitDialog() { showDialog( context: context, builder: (ctx) => AddHabitDialog(onAddHabit: _addHabit), ); } @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar( title: const Text('Habit Tracker'), actions: [ IconButton( icon: const Icon(Icons.add), onPressed: _showAddHabitDialog, ), ], ), body: _habits.isEmpty ? const Center( child: Text( 'No habits yet. Add your first habit!', style: TextStyle(fontSize: 18), ), ) : ListView.builder( itemCount: _habits.length, itemBuilder: (ctx, index) => HabitCard( habit: _habits[index], onToggle: _toggleHabitCompletion, onDelete: _deleteHabit, ), ), ); } } import 'package:flutter/material.dart'; import 'package:habit_tracker_app/models/habit.dart'; class HabitCard extends StatelessWidget { final Habit habit; final Function(Habit) onToggle; final Function(String) onDelete; const HabitCard({ super.key, required this.habit, required this.onToggle, required this.onDelete, }); @override Widget build(BuildContext context) { return Card( margin: const EdgeInsets.symmetric(horizontal: 16, vertical: 8), child: Padding( padding: const EdgeInsets.all(16), child: Column( crossAxisAlignment: CrossAxisAlignment.start, children: [ Row( mainAxisAlignment: MainAxisAlignment.spaceBetween, children: [ Text( habit.title, style: const TextStyle( fontSize: 18, fontWeight: FontWeight.bold, ), ), IconButton( icon: const Icon(Icons.delete), onPressed: () => onDelete(habit.id), ), ], ), if (habit.description.isNotEmpty) Padding( padding: const EdgeInsets.only(top: 8), child: Text(habit.description), ), const SizedBox(height: 16), LinearProgressIndicator( value: habit.progress, backgroundColor: Colors.grey[300], color: Colors.deepPurple, ), const SizedBox(height: 8), Row( mainAxisAlignment: MainAxisAlignment.spaceBetween, children: [ Text( '${habit.completedDates.length}/${habit.targetDays} days', style: const TextStyle(fontSize: 14), ), Switch( value: habit.isCompletedToday(), onChanged: (_) => onToggle(habit), ), ], ), ], ), ), ); } } import 'package:flutter/material.dart'; class AddHabitDialog extends StatefulWidget { final Function(String, String, int) onAddHabit; const AddHabitDialog({super.key, required this.onAddHabit}); @override State createState() => _AddHabitDialogState(); } class _AddHabitDialogState extends State { final _formKey = GlobalKey(); final _titleController = TextEditingController(); final _descriptionController = TextEditingController(); int _targetDays = 7; @override void dispose() { _titleController.dispose(); _descriptionController.dispose(); super.dispose(); } void _submit() { if (_formKey.currentState!.validate()) { widget.onAddHabit( _titleController.text, _descriptionController.text, _targetDays, ); Navigator.of(context).pop(); } } @override Widget build(BuildContext context) { return AlertDialog( title: const Text('Add New Habit'), content: Form( key: _formKey, child: SingleChildScrollView( child: Column( mainAxisSize: MainAxisSize.min, children: [ TextFormField( controller: _titleController, decoration: const InputDecoration( labelText: 'Habit Title', border: OutlineInputBorder(), ), validator: (value) { if (value == null || value.isEmpty) { return 'Please enter a title'; } return null; }, ), const SizedBox(height: 16), TextFormField( controller: _descriptionController, decoration: const InputDecoration( labelText: 'Description (optional)', border: OutlineInputBorder(), ), maxLines: 3, ), const SizedBox(height: 16), Row( children: [ const Text('Target Days:'), const SizedBox(width: 8), DropdownButton( value: _targetDays, items: const [ DropdownMenuItem(value: 7, child: Text('7 days')), DropdownMenuItem(value: 14, child: Text('14 days')), DropdownMenuItem(value: 21, child: Text('21 days')), DropdownMenuItem(value: 30, child: Text('30 days')), ], onChanged: (value) { setState(() { _targetDays = value!; }); }, ), ], ), ], ), ), ), actions: [ TextButton( onPressed: () => Navigator.of(context).pop(), child: const Text('Cancel'), ), ElevatedButton( onPressed: _submit, child: const Text('Add Habit'), ), ], ); } } name: habit_tracker_app description: A Flutter habit tracker application. publish_to: 'none' version: 1.0.0+1 environment: sdk: '>=3.0.0 <4.0.0' dependencies: flutter: sdk: flutter cupertino_icons: ^1.0.2 dev_dependencies: flutter_test: sdk: flutter flutter_lints: ^2.0.0 flutter: uses-material-design: true