143 lines
4.2 KiB
Dart
143 lines
4.2 KiB
Dart
import 'dart:async';
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import 'package:flutter/material.dart';
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import 'package:intl/intl.dart';
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class HiddenRollWidget extends StatefulWidget {
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/// 隐患列表数据
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final List<Map<String, dynamic>> hiddenList;
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/// 每行高度
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final double rowHeight;
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/// 同一时间可见的行数
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final int visibleCount;
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/// 滚动间隔
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final Duration interval;
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/// 点击回调，传递 HIDDEN_ID
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final ValueChanged<String>? onItemTap;
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const HiddenRollWidget({
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Key? key,
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required this.hiddenList,
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this.rowHeight = 35,
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this.visibleCount = 5,
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this.interval = const Duration(seconds: 3),
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this.onItemTap,
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}) : super(key: key);
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@override
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_HiddenRollWidgetState createState() => _HiddenRollWidgetState();
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}
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class _HiddenRollWidgetState extends State<HiddenRollWidget> {
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late final ScrollController _ctrl;
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late final Timer _timer;
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int _currentIndex = 0;
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@override
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void initState() {
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super.initState();
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_ctrl = ScrollController();
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_timer = Timer.periodic(widget.interval, (_) => _scrollToNext());
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}
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void _scrollToNext() {
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if (!_ctrl.hasClients || widget.hiddenList.isEmpty) return;
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_currentIndex++;
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if (_currentIndex >= widget.hiddenList.length) {
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_currentIndex = 0;
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_ctrl.jumpTo(0);
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} else {
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_ctrl.animateTo(
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widget.rowHeight * _currentIndex,
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duration: const Duration(milliseconds: 400),
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curve: Curves.easeInOut,
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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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_timer.cancel();
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_ctrl.dispose();
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super.dispose();
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}
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@override
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Widget build(BuildContext context) {
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// 容器高度 = 行高 * 可见行数
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return SizedBox(
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height: widget.rowHeight * widget.visibleCount,
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child: ListView.builder(
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controller: _ctrl,
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physics: const NeverScrollableScrollPhysics(),
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itemExtent: widget.rowHeight,
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itemCount: widget.hiddenList.length,
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itemBuilder: (_, idx) {
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final item = widget.hiddenList[idx];
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// 原始时间字符串
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String rawTime = item['CREATTIME'] ?? '';
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DateTime? dt;
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if (rawTime.isNotEmpty) {
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try {
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dt = DateTime.parse(rawTime.replaceAll('-', '/'));
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} catch (_) {}
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}
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// 去除年份，仅保留 MM-dd HH:mm
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String displayTime;
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if (dt != null) {
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displayTime = DateFormat('MM-dd HH:mm').format(dt);
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} else {
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final parts = rawTime.split(' ');
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if (parts.length >= 2) {
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final datePart = parts[0];
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final timePart = parts[1];
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final mmdd = datePart.length >= 5 ? datePart.substring(5) : datePart;
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final hm = timePart.length >= 5 ? timePart.substring(0, 5) : timePart;
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displayTime = '$mmdd $hm';
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} else {
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displayTime = rawTime;
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}
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}
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// 隐患描述裁剪
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String descr = item['HIDDENDESCR'] ?? '';
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final displayDescr = descr.length > 10 ? '${descr.substring(0, 10)}...' : descr;
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return InkWell(
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onTap: () => widget.onItemTap?.call(item['HIDDEN_ID'] as String),
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child: Padding(
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padding: const EdgeInsets.symmetric(horizontal: 15),
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child: Row(
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mainAxisAlignment: MainAxisAlignment.spaceBetween,
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children: [
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Expanded(
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flex: 3,
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child: Text(
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displayDescr,
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overflow: TextOverflow.ellipsis,
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),
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),
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Expanded(
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flex: 2,
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child: Text(
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item['CREATORNAME'] ?? '',
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textAlign: TextAlign.center,
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overflow: TextOverflow.ellipsis,
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),
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),
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Expanded(
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flex: 2,
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child: Text(
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displayTime,
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textAlign: TextAlign.right,
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overflow: TextOverflow.ellipsis,
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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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),
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);
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}
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}
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