127 lines
2.9 KiB
Dart
127 lines
2.9 KiB
Dart
import 'package:flutter/material.dart';
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import 'common_widget.dart';
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class YearSelector extends StatefulWidget {
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final int currentYear;
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final Function(int) onYearChanged;
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const YearSelector(
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{super.key, required this.currentYear, required this.onYearChanged});
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@override
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State<YearSelector> createState() => _YearSelectorState();
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}
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class _YearSelectorState extends State<YearSelector>
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with SingleTickerProviderStateMixin {
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final int minYear = 2000;
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final int maxYear = 2100;
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late int _currentYear;
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// 用于动画效果
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late AnimationController _animationController;
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late Animation<double> _scaleAnimation;
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@override
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void initState() {
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super.initState();
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_currentYear = widget.currentYear;
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// 初始化动画控制器
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_animationController = AnimationController(
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vsync: this,
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duration: const Duration(milliseconds: 200),
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);
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// 缩放动画
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_scaleAnimation = Tween<double>(begin: 1.0, end: 1.1).animate(
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CurvedAnimation(parent: _animationController, curve: Curves.easeInOut),
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);
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}
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@override
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void didUpdateWidget(YearSelector oldWidget) {
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super.didUpdateWidget(oldWidget);
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if (oldWidget.currentYear != widget.currentYear) {
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setState(() {
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_currentYear = widget.currentYear;
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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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_animationController.dispose();
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super.dispose();
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}
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/// 切换到上一年
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void _previousYear() {
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if (_currentYear > minYear) {
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_animateYearChange(() {
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final newYear = _currentYear - 1;
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setState(() {
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_currentYear = newYear;
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});
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widget.onYearChanged(newYear);
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});
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}
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}
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/// 切换到下一年
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void _nextYear() {
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if (_currentYear < maxYear) {
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_animateYearChange(() {
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final newYear = _currentYear + 1;
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setState(() {
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_currentYear = newYear;
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});
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widget.onYearChanged(newYear);
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});
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}
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}
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/// 年份变化时的动画效果
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void _animateYearChange(VoidCallback onComplete) {
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_animationController.forward().then((_) {
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onComplete();
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_animationController.reverse();
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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 Row(
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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CircleIconButton(
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icon: Icons.chevron_left,
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onPressed: _previousYear,
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),
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AnimatedBuilder(
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animation: _scaleAnimation,
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builder: (context, child) {
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return Transform.scale(scale: _scaleAnimation.value, child: child);
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},
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child: Text(
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'$_currentYear',
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style: TextStyle(
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fontSize: 18,
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fontWeight: FontWeight.bold,
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color: Theme.of(context).colorScheme.primary,
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),
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),
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),
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CircleIconButton(
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icon: Icons.chevron_right,
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onPressed: _nextYear,
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),
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],
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);
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}
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}
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