初始化
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谢宇宁
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import 'dart:async';
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import 'package:flutter/material.dart';
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import 'package:get/get.dart';
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import 'package:hgdj/hj_utils/screen.dart';
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import 'package:hgdj/tools_base/widget/net_image_widget.dart';
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import '../../assets_tool/images.dart';
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import '../../hj_page/mine/mine_vip/pay_order_source.dart';
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import '../../hj_page/mine/mine_vip/vip_support_model.dart';
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import '../../hj_page/mine/widgets/gradient_text.dart';
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import 'guide_common.dart';
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import 'guide_config.dart';
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import 'guide_manager.dart';
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/// 优惠倒计时：时长前端写死，起点由 app 启动时 reset 一次，回前台不重置
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class PromoCountdown {
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static const Duration _duration = Duration(hours: 2);
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static DateTime? _deadline;
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static DateTime get _end => _deadline ??= DateTime.now().add(_duration);
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/// 剩余时长，归零停在 0
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static Duration get remain {
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final d = _end.difference(DateTime.now());
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return d.isNegative ? Duration.zero : d;
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}
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/// app 启动时调一次(见 main)，进程存活期间自然倒数
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static void reset() => _deadline = DateTime.now().add(_duration);
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}
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/// 优惠倒计时弹窗(居中)：主图骑顶 + 优惠文案 + 倒计时 + 开通按钮。
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/// 长视频返回挽留 / 进会员页时触发
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class GuideCountdownDialog extends StatelessWidget {
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final VipProductModel card;
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final ValueChanged<VipProductModel>?
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onConfirm; // 默认跳会员页选卡；已在会员页的场景自己处理(关弹窗+就地选中该卡)
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final PaySourcePage sourcePage;
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final String cover; // 场景下发的主图，相对路径由 ImageCacheManager 拼域名
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const GuideCountdownDialog({
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super.key,
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required this.card,
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required this.sourcePage,
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required this.cover,
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this.onConfirm,
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});
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/// [scene] 决定主图/卡/下单来源，调用方须先用开关判过能弹
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/// 返回 true = 点了「立即开通」(点X/点蒙层/没弹成都是 false)，返回挽留场景据此决定要不要放行返回
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static Future<bool> show(
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{required GuideScene scene,
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ValueChanged<VipProductModel>? onConfirm}) async {
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final card = await loadGuideCard(scene);
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if (card == null) return false; // 配置有误不弹
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final confirmed = await Get.dialog<bool>(
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GuideCountdownDialog(
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card: card,
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sourcePage: guideSourcePage(scene),
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cover: GuideManager().configOf(scene)?.cover ?? '', //已校验非空
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onConfirm: onConfirm,
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),
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);
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return confirmed ?? false;
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}
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@override
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Widget build(BuildContext context) {
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return Material(
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color: Colors.transparent,
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child: Center(
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child: Column(
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mainAxisSize: MainAxisSize.min,
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children: [
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SizedBox(
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width: 311,
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child: Stack(
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clipBehavior: Clip.none,
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alignment: Alignment.topCenter,
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children: [
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// 主体(顶部留 61 给主图骑顶溢出)
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Container(
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margin: const EdgeInsets.only(top: 61),
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padding: const EdgeInsets.fromLTRB(24, 80, 24, 24),
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decoration: BoxDecoration(
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color: const Color(0xff0F0F0F),
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borderRadius: BorderRadius.circular(16),
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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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// 现在下单获得[优惠]福利：「优惠」金渐变、更大号
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Row(
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mainAxisSize: MainAxisSize.min,
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crossAxisAlignment: CrossAxisAlignment.baseline,
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textBaseline: TextBaseline.alphabetic,
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children: [
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const Text('现在下单获得',
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style: TextStyle(
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color: Colors.white,
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fontSize: 19,
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fontWeight: FontWeight.w800)),
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2.sizeBoxW,
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const GradientText(
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'优惠',
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gradient: LinearGradient(colors: [
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Color(0xffFFE3A0),
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Color(0xffF0A93C)
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]),
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style: TextStyle(
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color: Colors.white,
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fontSize: 26,
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fontWeight: FontWeight.w800),
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),
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2.sizeBoxW,
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const Text('福利',
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style: TextStyle(
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color: Colors.white,
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fontSize: 19,
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fontWeight: FontWeight.w800)),
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],
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),
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15.sizeBoxH,
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const _CountdownRow(),
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15.sizeBoxH,
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GestureDetector(
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onTap: () {
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if (onConfirm != null) {
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onConfirm!(card);
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} else {
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goVipDetail(card, sourcePage: sourcePage);
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}
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},
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child: Container(
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width: 269,
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height: 52,
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alignment: Alignment.center,
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decoration: BoxDecoration(
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gradient: const LinearGradient(colors: [
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Color(0xffFFB03F),
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Color(0xffF2680C)
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]),
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borderRadius: BorderRadius.circular(26),
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boxShadow: [
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BoxShadow(
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color: const Color(0x73F2680C),
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blurRadius: 18,
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offset: const Offset(0, 6))
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], // rgba(242,104,12,0.45)
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),
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child: Text(
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'立即开通 · 仅需¥${card.discountedPriceUI}',
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style: const TextStyle(
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color: Colors.white,
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fontSize: 17,
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fontWeight: FontWeight.w700),
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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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// 主图骑在顶部
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Positioned(
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top: 0,
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child: SizedBox(
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width: 270,
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height: 122,
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child: NetworkImageLoader(
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imageUrl: cover, fit: BoxFit.fill, borderRadius: 8),
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),
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),
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],
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),
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),
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20.sizeBoxH,
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GestureDetector(
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onTap: () => Get.back(),
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child: Image.asset("close_button.png".commonImgPath, width: 32),
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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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/// 距优惠结束 HH:MM:SS：每秒只重建这一行，归零后停表
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class _CountdownRow extends StatefulWidget {
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const _CountdownRow();
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@override
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State<_CountdownRow> createState() => _CountdownRowState();
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}
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class _CountdownRowState extends State<_CountdownRow> {
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final _remain = ValueNotifier<Duration>(PromoCountdown.remain);
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Timer? _timer;
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@override
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void initState() {
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super.initState();
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_timer = Timer.periodic(const Duration(seconds: 1), (t) {
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final r = PromoCountdown.remain;
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if (r == Duration.zero) t.cancel(); //归零停表(含弹窗打开时就已过期)
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if (r.inSeconds == _remain.value.inSeconds) return; //秒数没变不通知
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_remain.value = r;
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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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_remain.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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return Row(
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mainAxisSize: MainAxisSize.min,
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children: [
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const Text('距优惠结束',
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style: TextStyle(
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color: Color(0xffB8AE9C),
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fontSize: 12,
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fontWeight: FontWeight.w500)),
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8.sizeBoxW,
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ValueListenableBuilder<Duration>(
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valueListenable: _remain,
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builder: (_, r, __) => Row(
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mainAxisSize: MainAxisSize.min,
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children: [
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_timeCell(r.inHours),
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_colon,
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_timeCell(r.inMinutes % 60),
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_colon,
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_timeCell(r.inSeconds % 60),
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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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// 时/分/秒块
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Widget _timeCell(int v) => Container(
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padding: const EdgeInsets.symmetric(horizontal: 7, vertical: 4),
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decoration: BoxDecoration(
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color: const Color(0xffE23B2E),
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borderRadius: BorderRadius.circular(6)),
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child: Text(
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v.toString().padLeft(2, '0'),
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style: const TextStyle(
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color: Colors.white, fontSize: 14, fontWeight: FontWeight.w700),
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),
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);
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Widget get _colon => const Padding(
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padding: EdgeInsets.symmetric(horizontal: 3),
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child: Text(':',
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style: TextStyle(
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color: Color(0xffE85B4F),
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fontSize: 14,
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fontWeight: FontWeight.w700)),
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);
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}
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