530 lines
14 KiB
Dart
530 lines
14 KiB
Dart
import 'package:flutter/material.dart';
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import 'package:flutter/services.dart';
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import '../models/record.dart';
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import '../data/categories.dart';
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import 'package:uuid/uuid.dart';
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import 'package:decimal/decimal.dart';
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class RecordPage extends StatefulWidget {
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final Record? record;
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final Function(Record) onSave; // 添加保存回调
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const RecordPage({
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Key? key,
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this.record,
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required this.onSave,
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}) : super(key: key);
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@override
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State<RecordPage> createState() => _RecordPageState();
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}
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class _RecordPageState extends State<RecordPage>
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with SingleTickerProviderStateMixin {
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late TabController _tabController;
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String? _selectedCategoryId;
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String _note = '';
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double _amount = 0.0;
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DateTime _selectedDate = DateTime.now();
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final _uuid = const Uuid();
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String _inputBuffer = '0.0'; // 用于显示的字符串
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String? _pendingOperation; // 等待执行的运算符
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String? _pendingValue; // 等待计算的第一个值
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String? _inputValue; // 当前输入的值
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final d = (String s) => Decimal.parse(s);
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@override
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void initState() {
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super.initState();
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// 先初始化 TabController
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_tabController = TabController(
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length: 2,
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vsync: this,
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initialIndex: widget.record?.type == RecordType.income ? 1 : 0,
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);
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_tabController.addListener(_onTabChanged);
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// 初始化数据
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if (widget.record != null) {
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// 编辑模式：初始化现有记录的数据
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_selectedCategoryId = widget.record!.categoryId;
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_note = widget.record!.note ?? '';
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_amount = widget.record!.amount;
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_selectedDate = widget.record!.createTime;
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// 设置输入缓冲区为当前金额的格式化字符串
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_inputBuffer = _formatNumberForDisplay(widget.record!.amount);
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} else {
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// 新建模式：默认选中第一个分类
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_selectedCategoryId = _currentCategories.first.id;
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}
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}
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/// 标签切换监听
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void _onTabChanged() {
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setState(() {
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// 切换类型时选中新类型的第一个分类
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_selectedCategoryId = _currentCategories.first.id;
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});
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}
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/// 获取当前记录类型
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RecordType get _currentType =>
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_tabController.index == 0 ? RecordType.expense : RecordType.income;
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/// 获取当前分类列表
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List<Category> get _currentCategories =>
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_currentType == RecordType.expense ? expenseCategories : incomeCategories;
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/// 保存记录
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void _saveRecord() {
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if (_selectedCategoryId == null) {
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ScaffoldMessenger.of(context).showSnackBar(
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const SnackBar(content: Text('请选择分类')),
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);
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return;
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}
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if (_amount <= 0) {
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ScaffoldMessenger.of(context).showSnackBar(
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const SnackBar(content: Text('输入金额请大于0')),
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);
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return;
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}
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final record = Record(
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id: widget.record?.id ?? _uuid.v4(),
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type: _currentType,
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categoryId: _selectedCategoryId!,
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note: _note.isEmpty ? null : _note,
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amount: _amount,
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createTime: _selectedDate,
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);
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widget.onSave(record);
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Navigator.of(context).pop();
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}
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/// 显示金额
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String get _displayAmount {
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if (_pendingOperation != null ||
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_pendingValue != null ||
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_inputValue != null) {
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_inputBuffer =
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'${_pendingValue ?? ""} ${_pendingOperation ?? ""} ${_inputValue ?? ""}';
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} else {
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_inputBuffer = '0.0';
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}
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return _inputBuffer;
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}
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/// 处理数字输入
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void _handleNumber(String digit) {
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setState(() {
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if (_inputValue == '0' || _inputValue == null) {
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// 当前是0
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_inputValue = digit;
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} else {
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// 其他情况追加数字
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_inputValue = _inputValue! + digit;
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}
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});
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}
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/// 处理小数点
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void _handleDecimal() {
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setState(() {
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if (_inputValue == null || _inputValue == '0') {
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_inputValue = '0.';
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} else if (_inputValue!.contains('.')) {
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HapticFeedback.heavyImpact();
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} else {
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_inputValue = '$_inputValue.';
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}
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});
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}
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/// 处理删除
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void _handleDelete() {
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setState(() {
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if (_inputValue != null) {
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if (_inputValue!.length > 1) {
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_inputValue = _inputValue!.substring(0, _inputValue!.length - 1);
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} else {
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_inputValue = null;
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}
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} else if (_pendingOperation != null) {
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_pendingOperation = null;
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} else if (_pendingValue != null) {
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if (_pendingValue!.length > 1) {
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_pendingValue =
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_pendingValue!.substring(0, _pendingValue!.length - 1);
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} else {
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_pendingValue = null;
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}
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} else {
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_pendingValue = null;
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}
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});
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}
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/// 处理运算符
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void _handleOperator(String operator) {
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// 如果有待处理的运算，先计算结果
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if (_pendingOperation != null) {
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// 先保存当前运算符，因为计算可能会重置状态
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final newOperator = operator;
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_calculateResult();
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// 计算完成后，设置新的运算符
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setState(() {
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// 如果计算导致重置（结果为0），不添加新的运算符
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if (_inputBuffer == '0.0') {
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return;
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} else {
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_pendingOperation = newOperator;
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}
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});
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} else if (_inputValue != null) {
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// 正常设置运算符
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setState(() {
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_pendingOperation = operator;
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_pendingValue = _inputValue!;
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_inputValue = null;
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});
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} else {
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HapticFeedback.heavyImpact();
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}
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}
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/// 计算结果
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void _calculateResult() {
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double result = 0;
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if(_pendingValue == null && _inputValue== null){
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return;
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}
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else if (_pendingOperation != null &&
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_pendingValue != null &&
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_inputValue != null) {
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switch (_pendingOperation) {
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case '+':
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result = (d(_pendingValue!) + d(_inputValue!)).toDouble();
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if (result == 0) {
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_resetToDefault();
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return;
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}
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break;
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case '-':
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result = (d(_pendingValue!) - d(_inputValue!)).toDouble();
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if (result <= 0) {
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_resetToDefault();
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return;
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}
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break;
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default:
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return;
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}
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} else {
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result = double.parse(_inputValue ?? _pendingValue!);
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}
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setState(() {
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// 格式化结果，去掉不必要的小数位
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_pendingValue = _formatNumberForDisplay(result);
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_amount = result;
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_pendingOperation = null;
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_inputValue = null;
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});
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}
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/// 重置到默认状态
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void _resetToDefault() {
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setState(() {
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_inputBuffer = '0.0';
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_amount = 0;
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_pendingOperation = null;
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_pendingValue = null;
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_inputValue = null;
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});
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}
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/// 格式化数字用于显示
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String _formatNumberForDisplay(double number) {
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// 如果是整数，直接返回整数部分
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if (number % 1 == 0) {
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return number.toInt().toString();
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}
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// 如果是小数，去掉末尾的0
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String numStr = number.toString();
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while (numStr.endsWith('0')) {
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numStr = numStr.substring(0, numStr.length - 1);
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}
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if (numStr.endsWith('.')) {
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numStr = numStr.substring(0, numStr.length - 1);
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}
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return numStr;
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}
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/// 修改键盘按钮处理逻辑
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void _onKeyboardButtonPressed(String value) {
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if (_inputBuffer.length >= 20 && value != '删除' && value != '保存'&& value != 'again'){
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ScaffoldMessenger.of(context).showSnackBar(
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const SnackBar(content: Text('输入数字过大')),
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);
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return;
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}
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switch (value) {
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case '删除':
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_handleDelete();
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break;
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case '保存':
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_calculateResult();
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_saveRecord();
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break;
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case 'again':
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// TODO: 实现again功能
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break;
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case '+':
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case '-':
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_handleOperator(value);
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break;
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case '.':
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_handleDecimal();
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break;
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default:
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_handleNumber(value);
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}
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}
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/// 格式化日期显示
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String _formatDate(DateTime date) {
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final now = DateTime.now();
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final today = DateTime(now.year, now.month, now.day);
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final dateToCheck = DateTime(date.year, date.month, date.day);
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final difference = today.difference(dateToCheck).inDays;
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// 检查是否是今天、昨天、前天
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switch (difference) {
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case 0:
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return '今天';
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case 1:
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return '昨天';
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case 2:
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return '前天';
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default:
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// 如果是当年
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if (date.year == now.year) {
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return '${date.month}/${date.day}';
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}
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// 不是当年
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return '${date.year}/${date.month}/${date.day}';
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}
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}
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@override
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Widget build(BuildContext context) {
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return Scaffold(
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appBar: AppBar(
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title: TabBar(
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controller: _tabController,
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tabs: const [
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Tab(text: '支出'),
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Tab(text: '收入'),
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],
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),
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),
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body: Column(
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children: [
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// 分类网格
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Expanded(
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child: GridView.builder(
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padding: const EdgeInsets.all(16),
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gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(
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crossAxisCount: 4,
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mainAxisSpacing: 16,
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crossAxisSpacing: 16,
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),
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itemCount: _currentCategories.length,
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itemBuilder: (context, index) {
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final category = _currentCategories[index];
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final isSelected = category.id == _selectedCategoryId;
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return _buildCategoryItem(category, isSelected);
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},
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),
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),
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// 底部编辑区域
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_buildBottomEditor(),
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],
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),
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);
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}
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/// 构建分类项
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Widget _buildCategoryItem(Category category, bool isSelected) {
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return InkWell(
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onTap: () => setState(() => _selectedCategoryId = category.id),
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child: Container(
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decoration: BoxDecoration(
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color: isSelected
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? Theme.of(context).primaryColor.withOpacity(0.1)
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: null,
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border: Border.all(
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color: isSelected ? Theme.of(context).primaryColor : Colors.grey,
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),
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borderRadius: BorderRadius.circular(8),
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),
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child: Column(
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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Icon(
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category.icon,
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color: isSelected ? Theme.of(context).primaryColor : Colors.grey,
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),
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const SizedBox(height: 4),
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Text(
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category.name,
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style: TextStyle(
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color:
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isSelected ? Theme.of(context).primaryColor : Colors.grey,
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),
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),
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],
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),
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),
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);
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}
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/// 构建底部编辑区域
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Widget _buildBottomEditor() {
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return Container(
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padding: const EdgeInsets.all(16),
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decoration: BoxDecoration(
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color: Colors.white,
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boxShadow: [
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BoxShadow(
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color: Colors.black.withOpacity(0.1),
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blurRadius: 8,
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offset: const Offset(0, -2),
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),
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],
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),
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child: Column(
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mainAxisSize: MainAxisSize.min,
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children: [
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// 备注和金额
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_buildNoteAndAmount(),
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// 配置按钮
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Row(
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children: [
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TextButton.icon(
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onPressed: () {
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// TODO: 实现账户选择
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},
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icon: const Icon(Icons.account_balance_wallet),
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label: const Text('默认账户'),
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),
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TextButton.icon(
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onPressed: () async {
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final date = await showDatePicker(
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context: context,
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initialDate: _selectedDate,
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firstDate: DateTime(2000),
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lastDate: DateTime.now(),
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);
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if (date != null) {
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setState(() => _selectedDate = date);
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}
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},
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icon: const Icon(Icons.calendar_today),
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label: Text(_formatDate(_selectedDate)),
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),
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TextButton.icon(
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onPressed: () {
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// TODO: 实现图片选择
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},
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icon: const Icon(Icons.photo),
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label: const Text('图片'),
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),
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],
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),
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// 数字键盘
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_buildNumberKeyboard(),
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],
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),
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);
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}
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/// 构建数字键盘
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Widget _buildNumberKeyboard() {
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return GridView.count(
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shrinkWrap: true,
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crossAxisCount: 4,
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childAspectRatio: 2,
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children: [
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_buildKeyboardButton('7'),
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_buildKeyboardButton('8'),
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_buildKeyboardButton('9'),
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_buildKeyboardButton('删除', isFunction: true),
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_buildKeyboardButton('4'),
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_buildKeyboardButton('5'),
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_buildKeyboardButton('6'),
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_buildKeyboardButton('+'),
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_buildKeyboardButton('1'),
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_buildKeyboardButton('2'),
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_buildKeyboardButton('3'),
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_buildKeyboardButton('-'),
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_buildKeyboardButton('again'),
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_buildKeyboardButton('0'),
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_buildKeyboardButton('.'),
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_buildKeyboardButton('保存', isFunction: true),
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],
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);
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}
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/// 构建键盘按钮
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Widget _buildKeyboardButton(String text, {bool isFunction = false}) {
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return TextButton(
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onPressed: () => _onKeyboardButtonPressed(text),
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child: Text(
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text,
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style: TextStyle(
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fontSize: 20,
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color: isFunction ? Theme.of(context).primaryColor : Colors.black,
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),
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),
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);
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}
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/// 构建底部编辑区域中的备注和金额行
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Widget _buildNoteAndAmount() {
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return Row(
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children: [
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Expanded(
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child: TextField(
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controller: TextEditingController(text: _note), // 使用控制器设置初始值
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decoration: const InputDecoration(
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hintText: '添加备注',
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border: InputBorder.none,
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),
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onChanged: (value) => setState(() => _note = value),
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),
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),
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Text(
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_displayAmount,
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style: const TextStyle(
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fontSize: 24,
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fontWeight: FontWeight.bold,
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),
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),
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],
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);
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}
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@override
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void dispose() {
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_tabController.dispose();
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super.dispose();
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}
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}
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