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September 18, 2024 08:13
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| import 'package:flutter/material.dart'; | |
| void main() { | |
| runApp(MaterialApp( | |
| home: TransactionPage(), | |
| )); | |
| } | |
| class TransactionPage extends StatefulWidget { | |
| @override | |
| _TransactionPageState createState() => _TransactionPageState(); | |
| } | |
| class _TransactionPageState extends State<TransactionPage> { | |
| final ScrollController _scrollController = ScrollController(); | |
| int _highlightedMonthIndex = 0; | |
| final List<GlobalKey> _sectionKeys = []; | |
| // Mock data for months and transactions | |
| final List<String> _months = [ | |
| 'January', | |
| 'February', | |
| 'March', | |
| 'April', | |
| 'May', | |
| 'June', | |
| 'July', | |
| 'August', | |
| 'September', | |
| 'October', | |
| 'November', | |
| 'December' | |
| ]; | |
| final Map<int, List<String>> _transactionsByMonth = { | |
| 0: ['Transaction A', 'Transaction B'], // January | |
| 1: ['Transaction C', 'Transaction D'], // February | |
| 2: ['Transaction E', 'Transaction F', 'Transaction G'], // March | |
| 3: ['Transaction H', 'Transaction I'], // April | |
| 4: ['Transaction J', 'Transaction K', 'Transaction L', 'Transaction M'], // May | |
| 5: ['Transaction N'], // June | |
| 6: ['Transaction O', 'Transaction P'], // July | |
| 7: ['Transaction Q', 'Transaction R'], // August | |
| 8: ['Transaction S'], // September | |
| 9: ['Transaction T', 'Transaction U'], // October | |
| 10: ['Transaction V'], // November | |
| 11: ['Transaction W', 'Transaction X'], // December | |
| }; | |
| @override | |
| void initState() { | |
| super.initState(); | |
| _scrollController.addListener(_onScroll); | |
| _sectionKeys.addAll(List.generate(_transactionsByMonth.length, (_) => GlobalKey())); | |
| } | |
| @override | |
| void dispose() { | |
| _scrollController.dispose(); | |
| super.dispose(); | |
| } | |
| void _onScroll() { | |
| for (int i = 0; i < _sectionKeys.length; i++) { | |
| final context = _sectionKeys[i].currentContext; | |
| if (context != null) { | |
| final box = context.findRenderObject() as RenderBox; | |
| final position = box.localToGlobal(Offset.zero); | |
| // Check if this section is currently visible on screen | |
| if (position.dy + box.size.height > 150) { | |
| if (_highlightedMonthIndex != i) { | |
| setState(() { | |
| _highlightedMonthIndex = i; | |
| }); | |
| } | |
| break; | |
| } | |
| } | |
| } | |
| } | |
| @override | |
| Widget build(BuildContext context) { | |
| return Scaffold( | |
| appBar: AppBar( | |
| title: Text('Transactions'), | |
| ), | |
| body: Column( | |
| children: [ | |
| // Horizontal list of months | |
| Container( | |
| height: 60, | |
| child: ListView.builder( | |
| scrollDirection: Axis.horizontal, | |
| itemCount: _months.length, | |
| itemBuilder: (context, index) { | |
| return Padding( | |
| padding: const EdgeInsets.all(8.0), | |
| child: Text( | |
| _months[index], | |
| style: TextStyle( | |
| fontSize: 18, | |
| fontWeight: FontWeight.bold, | |
| color: _highlightedMonthIndex == index | |
| ? Colors.blue // Highlight current month | |
| : Colors.black, | |
| ), | |
| ), | |
| ); | |
| }, | |
| ), | |
| ), | |
| Expanded( | |
| child: ListView.builder( | |
| controller: _scrollController, | |
| itemCount: _transactionsByMonth.length, | |
| itemBuilder: (context, index) { | |
| return Column( | |
| key: _sectionKeys[index], // Assigning GlobalKey to each section | |
| crossAxisAlignment: CrossAxisAlignment.start, | |
| children: [ | |
| Padding( | |
| padding: const EdgeInsets.all(8.0), | |
| child: Text( | |
| _months[index], | |
| style: TextStyle(fontSize: 24, fontWeight: FontWeight.bold), | |
| ), | |
| ), | |
| ..._transactionsByMonth[index]! | |
| .map((transaction) => ListTile(title: Text(transaction))) | |
| .toList(), | |
| ], | |
| ); | |
| }, | |
| ), | |
| ), | |
| ], | |
| ), | |
| ); | |
| } | |
| } |
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