初始化
This commit is contained in:
谢宇宁
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import 'package:flutter/material.dart';
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import 'package:hgdj/hj_utils/screen.dart';
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import 'package:hgdj/tools_base/widget/card_swiper/src/swiper.dart';
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import 'package:hgdj/tools_base/widget/image_browser_page.dart';
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import 'package:hgdj/tools_base/widget/net_image_widget.dart';
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import '../../hj_model/splash/ads_model.dart';
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import 'ads_item.dart';
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/// 广告轮播
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class AdsBannerWidget extends StatefulWidget {
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final List<AdsInfoModel>? models; // 广告数据列表
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final double? width; // 整体宽度
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final double? height; // 整体高度
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final ValueChanged<int>? onItemClick; // 点击某页回调（传 index）
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final ValueChanged<int>? onIndexChanged; // 切换页回调（传 index）
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final int? autoPlayMs; // 自动轮播间隔（毫秒），默认 5000
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final bool isIndicatorBottomCenter; // 指示器置于底部居中
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final bool isIndicatorUnderCenter; // 指示器置于轮播下方居中（Column 布局）
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final Color? color; // 指示器未选中色
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final Color? selectColor; // 指示器选中色
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final bool isCircle; // 透传给 CIndicator.isBarStyle（true=长条红色风格）
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final double borderRadius; // 图片圆角，默认 12
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AdsBannerWidget(
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this.models, {
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super.key,
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this.width,
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this.height,
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this.autoPlayMs = 5000,
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this.onItemClick,
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this.onIndexChanged,
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this.isIndicatorBottomCenter = false,
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this.isIndicatorUnderCenter = false,
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this.color,
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this.selectColor,
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this.isCircle = true,
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this.borderRadius = 12,
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});
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@override
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State<AdsBannerWidget> createState() => _AdsBannerWidgetState();
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}
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class _AdsBannerWidgetState extends State<AdsBannerWidget> {
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// 当前页随轮播变化，用 ValueNotifier 局部刷新指示器，避免每次都 setState 重建整棵树(含 Swiper)
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final ValueNotifier<int> _selectIndex = ValueNotifier(0);
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int get _count => widget.models?.length ?? 0;
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@override
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void dispose() {
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_selectIndex.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 SizedBox(
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width: widget.width,
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height: widget.height,
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child: widget.isIndicatorUnderCenter
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? Column(
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children: [
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// 该分支高度固定 256（唯一调用方不传 height，靠此撑开 Swiper）
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SizedBox(height: 256, child: _buildSwiper()),
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12.sizeBoxH,
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if (_count > 1)
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Container(
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alignment: Alignment.center,
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child:
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_buildIndicator(space: 4, dotSize: 4, selectWidth: 8),
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),
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],
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)
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: Stack(
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clipBehavior: Clip.none,
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children: [
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_buildSwiper(),
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if (widget.isIndicatorBottomCenter)
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Positioned(
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bottom: 10,
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left: 0,
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right: 0,
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child: _count > 1
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? Container(
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alignment: Alignment.center,
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child: _buildIndicator(
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space: 2,
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dotSize: 2,
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selectWidth: 5,
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// 视频广告 cell：主题黄(未选中半透明,选中实心)
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color: widget.color ??
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const Color(0xffFFD900)
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.withValues(alpha: 0.4),
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selectColor:
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widget.selectColor ?? const Color(0xffFFD900),
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),
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)
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: const SizedBox.shrink(),
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)
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else
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Positioned(
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bottom: 7,
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right: 7,
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child: _count > 1
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? _buildIndicator(space: 4, dotSize: 4, selectWidth: 8)
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: const SizedBox.shrink(),
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),
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],
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),
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);
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}
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/// 轮播主体；两种指示器布局共用
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Widget _buildSwiper() {
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return Swiper(
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autoplay: _count > 1,
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autoplayDelay: widget.autoPlayMs ?? 5000,
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loop: _count > 1,
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itemBuilder: (context, index) => AdsItem(
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adInfo: widget.models![index],
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showType: AdShowType.img,
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borderRadius: widget.borderRadius,
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),
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onTap: widget.onItemClick,
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onIndexChanged: (index) {
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_selectIndex.value = index;
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widget.onIndexChanged?.call(index);
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},
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itemCount: _count,
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);
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}
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/// 指示器随当前页局部刷新
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Widget _buildIndicator({
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required double space,
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required double dotSize,
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required double selectWidth,
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Color? color,
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Color? selectColor,
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}) {
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return ValueListenableBuilder<int>(
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valueListenable: _selectIndex,
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builder: (_, index, __) => CIndicator(
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itemCount: _count,
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selectIndex: index,
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space: space,
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dotSize: dotSize,
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selectWidth: selectWidth,
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color: color ?? widget.color,
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selectColor: selectColor ?? widget.selectColor,
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isBarStyle: widget.isCircle,
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),
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);
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}
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}
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/// 分页指示器
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class CIndicator extends StatelessWidget {
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const CIndicator({
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super.key,
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this.itemCount,
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this.selectIndex,
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this.space = 5.0,
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this.isBarStyle = true,
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this.color,
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this.selectColor,
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this.dotSize = 6,
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this.selectWidth = 12,
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});
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final int? itemCount; // 圆点总数
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final int? selectIndex; // 当前选中页
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final double? space; // 圆点间距
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final bool isBarStyle; // true=选中态长条+红色系；false=圆点+白色系
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final Color? color; // 未选中色（覆盖默认）
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final Color? selectColor; // 选中色（覆盖默认）
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final double dotSize; // 圆点直径
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final double selectWidth; // 选中态(长条)宽度，isBarStyle 时生效
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Widget _buildDot(int index) {
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final isSelected = selectIndex == index;
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final activeColor =
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selectColor ?? (isBarStyle ? const Color(0xffE1351F) : Colors.white);
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final inactiveColor = color ??
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(isBarStyle
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? const Color(0xffE1351F).withValues(alpha: 0.3)
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: Colors.white.withValues(alpha: 0.5));
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// 选中态长条、未选中态圆点；宽度与颜色平滑过渡(类似 Android 系统页面指示器)
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return Padding(
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padding: EdgeInsets.only(left: space ?? 0),
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child: AnimatedContainer(
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duration: const Duration(milliseconds: 300),
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curve: Curves.easeOutCubic,
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width: isSelected && isBarStyle ? selectWidth : dotSize,
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height: dotSize,
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decoration: BoxDecoration(
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borderRadius: BorderRadius.circular(dotSize / 2),
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color: isSelected ? activeColor : inactiveColor,
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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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Widget build(BuildContext context) {
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return Row(
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mainAxisSize: MainAxisSize.min,
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children: [for (int i = 0; i < (itemCount ?? 0); i++) _buildDot(i)],
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);
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}
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}
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/// 图集：左右滑动浏览，可选右上角页码 + 底部圆点指示器
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class ImageCollectionWidget extends StatefulWidget {
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final List<String>? imgs;
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final double aspectRatio;
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final bool showCIndicator; // 是否显示底部圆点指示器
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final bool showIndex; // 是否显示右上角页码
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ImageCollectionWidget({
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super.key,
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this.imgs,
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this.aspectRatio = 375 / 467,
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this.showCIndicator = true,
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this.showIndex = true,
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});
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@override
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State<ImageCollectionWidget> createState() => _ImageCollectionWidgetState();
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}
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class _ImageCollectionWidgetState extends State<ImageCollectionWidget> {
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// 当前页用 ValueNotifier 局部刷新页码/指示器，避免每次滑动都 setState 重建 Swiper
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final ValueNotifier<int> _selectIndex = ValueNotifier(0);
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int get _count => widget.imgs?.length ?? 0;
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@override
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void dispose() {
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_selectIndex.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 AspectRatio(
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aspectRatio: widget.aspectRatio,
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child: Stack(
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alignment: Alignment.center,
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children: [
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Swiper(
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autoplay: _count > 1,
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loop: _count > 1,
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itemBuilder: (context, index) {
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final cover = widget.imgs![index];
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return InkWell(
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enableFeedback: false,
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onTap: () =>
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ImageBrowserPage.open(widget.imgs ?? [], index: index),
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child: NetworkImageLoader(imageUrl: cover),
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);
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},
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onIndexChanged: (index) => _selectIndex.value = index,
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itemCount: _count,
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),
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// 右上角页码 1/N
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if (widget.showIndex && _count > 1)
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Positioned(
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top: 24,
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right: 16,
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child: ValueListenableBuilder<int>(
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valueListenable: _selectIndex,
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builder: (_, index, __) => Container(
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padding: const EdgeInsets.symmetric(horizontal: 14),
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alignment: Alignment.center,
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height: 28,
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decoration: BoxDecoration(
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borderRadius: BorderRadius.circular(999),
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color: Colors.black.withValues(alpha: .6),
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),
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child: Text('${index + 1}/$_count',
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style:
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const TextStyle(fontSize: 14, color: Colors.white)),
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),
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),
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),
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// 底部圆点指示器
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if (widget.showCIndicator && _count > 1)
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Positioned(
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bottom: 10,
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right: 12,
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child: ValueListenableBuilder<int>(
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valueListenable: _selectIndex,
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builder: (_, index, __) =>
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CIndicator(itemCount: _count, selectIndex: index, space: 6),
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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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/// AI 图生视频 banner：每页左原图、右生成图，自动轮播
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class AIBannerWidget extends StatefulWidget {
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final int index; // 初始选中页
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final List<AdsInfoModel>? models;
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const AIBannerWidget({super.key, this.index = 0, this.models});
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@override
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State<AIBannerWidget> createState() => _AIBannerWidgetState();
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}
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class _AIBannerWidgetState extends State<AIBannerWidget> {
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// 当前页用 ValueNotifier 局部刷新指示器，避免滑动重建 Swiper
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late final ValueNotifier<int> _selectIndex = ValueNotifier(widget.index);
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int get _count => widget.models?.length ?? 0;
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@override
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void dispose() {
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_selectIndex.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 Stack(children: [
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Swiper(
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autoplay: _count > 1,
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loop: _count > 1,
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autoplayDelay: 5000,
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itemBuilder: (context, index) {
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final item = widget.models?[index];
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// 左：原图 右：AI 生成图
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return Row(children: [
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Expanded(
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child: NetworkImageLoader(
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imageUrl: item?.cover ?? '', borderRadius: 0)),
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Expanded(
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child: NetworkImageLoader(
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imageUrl: item?.newUrl ?? '', borderRadius: 0)),
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]);
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},
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onIndexChanged: (index) => _selectIndex.value = index,
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itemCount: _count,
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),
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Positioned(
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bottom: 10,
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right: 10,
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child: _count > 1
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? ValueListenableBuilder<int>(
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valueListenable: _selectIndex,
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builder: (_, index, __) =>
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CIndicator(itemCount: _count, selectIndex: index),
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)
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: const SizedBox.shrink(),
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),
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]);
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}
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}
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