generated from dellevin/template
450 lines
17 KiB
Dart
450 lines
17 KiB
Dart
import 'package:flutter/material.dart';
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import 'package:provider/provider.dart';
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import '../../models/data_models.dart';
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import '../../providers/app_provider.dart';
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import '../../utils/user_prefs.dart';
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import '../../widgets/movie_status_bar.dart';
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import '../../widgets/movie_list_item.dart';
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import '../../widgets/animated_star_rating.dart';
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import '../../widgets/shimmer_skeleton.dart';
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import '../../widgets/fade_in_local_image.dart';
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import '../../utils/responsive.dart';
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import '../../widgets/master_detail_scaffold.dart';
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import '../../widgets/detail_placeholder.dart';
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import 'movie_detail_page.dart';
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/// 观影标签页（分页 + 触底加载）
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class MovieTabPage extends StatefulWidget {
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const MovieTabPage({super.key});
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@override
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State<MovieTabPage> createState() => _MovieTabPageState();
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}
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class _MovieTabPageState extends State<MovieTabPage> {
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final List<Movie> _items = [];
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bool _hasMore = true;
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bool _isLoading = false;
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int _offset = 0;
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bool _initialized = false;
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int _lastStatusIndex = -1;
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late ScrollController _scrollController;
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AppProvider? _provider;
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int _lastScrollSignal = 0;
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int _prevMovieCount = -1;
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int _prevLayoutStyle = -1;
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static const _statusMap = {0: 'watched', 1: 'watching', 2: 'want_to_watch'};
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@override
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void initState() {
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super.initState();
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_scrollController = ScrollController()..addListener(_onScroll);
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WidgetsBinding.instance.addPostFrameCallback((_) {
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final provider = context.read<AppProvider>();
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_provider = provider;
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provider.addListener(_onDataChanged);
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_loadFirst();
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});
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}
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@override
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void dispose() {
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_provider?.removeListener(_onDataChanged);
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_scrollController.dispose();
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super.dispose();
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}
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void _onDataChanged() {
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if (!_initialized || !mounted) return;
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final provider = context.read<AppProvider>();
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// 检查回到顶部信号
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if (provider.scrollToTopSignal != _lastScrollSignal && provider.scrollToTopSignal > 0) {
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_lastScrollSignal = provider.scrollToTopSignal;
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if (_scrollController.hasClients) {
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_scrollController.animateTo(0, duration: const Duration(milliseconds: 300), curve: Curves.easeOut);
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}
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}
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// 仅在数据或布局实际变化时刷新列表，避免底部导航栏显隐等UI变化误触发重载
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final statusChanged = provider.movieStatusIndex != _lastStatusIndex;
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final layoutChanged = provider.movieLayoutStyle != _prevLayoutStyle;
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final countChanged = provider.movies.length != _prevMovieCount;
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if (statusChanged || layoutChanged || countChanged) {
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_prevLayoutStyle = provider.movieLayoutStyle;
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_prevMovieCount = provider.movies.length;
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_loadFirst();
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}
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}
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void _onScroll() {
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if (_scrollController.position.pixels >= _scrollController.position.maxScrollExtent - 200) {
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_loadMore();
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}
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}
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Future<void> _loadFirst() async {
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final provider = context.read<AppProvider>();
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final statusIdx = provider.movieStatusIndex;
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_lastStatusIndex = statusIdx;
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_initialized = true;
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final status = _statusMap[statusIdx] ?? 'watched';
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setState(() { _isLoading = true; _offset = 0; _hasMore = true; });
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final list = await provider.loadMoviesPaged(status: status, offset: 0, sortMode: UserPrefs().movieSortMode);
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if (!mounted) return;
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setState(() {
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_items.clear();
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_items.addAll(list);
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_offset = list.length;
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_hasMore = list.length >= 20;
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_isLoading = false;
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});
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}
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Future<void> _loadMore() async {
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if (_isLoading || !_hasMore) return;
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setState(() => _isLoading = true);
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final provider = context.read<AppProvider>();
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final status = _statusMap[provider.movieStatusIndex] ?? 'watched';
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final list = await provider.loadMoviesPaged(status: status, offset: _offset, sortMode: UserPrefs().movieSortMode);
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if (!mounted) return;
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setState(() {
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_items.addAll(list);
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_offset += list.length;
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_hasMore = list.length >= 20;
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_isLoading = false;
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});
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}
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Future<void> _refresh() async {
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final provider = context.read<AppProvider>();
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await provider.loadMovies();
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await _loadFirst();
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}
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void _onMovieTap(Movie movie) {
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if (Breakpoint.isWideContent(context)) {
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context.read<AppProvider>().selectMovie(movie);
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} else {
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Navigator.pushNamed(context, '/movie-detail', arguments: movie);
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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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final colors = Theme.of(context).colorScheme;
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final isWideContent = Breakpoint.isWideContent(context);
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final provider = context.watch<AppProvider>();
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final masterContent = Column(
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children: [
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const MovieStatusBar(),
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Divider(height: 0.5, thickness: 0.5, color: colors.outlineVariant),
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Expanded(child: _buildBody(context)),
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],
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);
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if (!isWideContent) return masterContent;
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final selectedMovie = provider.selectedMovie;
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return MasterDetailScaffold(
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master: masterContent,
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detail: selectedMovie != null
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? MovieDetailPage(movie: selectedMovie, embedded: true)
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: const DetailPlaceholder(icon: Icons.movie_outlined, message: '选择一部影片查看详情'),
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);
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}
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Widget _buildBody(BuildContext context) {
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final colors = Theme.of(context).colorScheme;
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return Consumer<AppProvider>(
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builder: (context, provider, _) {
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// 状态切换时重新加载（跳过首次未初始化的情况）
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if (_initialized && provider.movieStatusIndex != _lastStatusIndex) {
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_lastStatusIndex = provider.movieStatusIndex;
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WidgetsBinding.instance.addPostFrameCallback((_) => _loadFirst());
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}
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if (_items.isEmpty && _isLoading) return _buildSkeleton();
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if (_items.isEmpty) {
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return RefreshIndicator(
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onRefresh: _refresh,
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color: colors.primary,
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backgroundColor: colors.surface,
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child: ListView(
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physics: const AlwaysScrollableScrollPhysics(),
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children: [_buildEmptyState(context, provider.movieStatusIndex)],
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),
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);
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}
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return RefreshIndicator(
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onRefresh: _refresh,
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color: colors.primary,
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backgroundColor: colors.surface,
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child: provider.movieLayoutStyle == 1 ? _buildListView() : provider.movieLayoutStyle == 2 ? _buildCoverCardView() : _buildGridView(),
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);
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},
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);
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}
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Widget _buildGridView() {
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return LayoutBuilder(
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builder: (context, constraints) {
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final crossAxisCount = responsiveCrossAxisCount(constraints.maxWidth, minItemWidth: 110);
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final isWideContent = Breakpoint.isWideContent(context);
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final provider = context.read<AppProvider>();
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return GridView.builder(
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controller: _scrollController,
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padding: const EdgeInsets.fromLTRB(16, 16, 16, 100),
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gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
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crossAxisCount: crossAxisCount, childAspectRatio: 0.55, crossAxisSpacing: 12, mainAxisSpacing: 16,
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),
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itemCount: _items.length + (_hasMore ? 1 : 0),
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itemBuilder: (context, index) {
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if (index >= _items.length) return _buildLoadMoreIndicator();
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final item = _items[index];
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return MovieListItem(
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movie: item,
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selected: isWideContent && provider.selectedMovie?.id == item.id,
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onTap: () => _onMovieTap(item),
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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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Widget _buildListView() {
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return ListView.builder(
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controller: _scrollController,
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padding: const EdgeInsets.fromLTRB(12, 8, 12, 100),
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itemCount: _items.length + (_hasMore ? 1 : 0),
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itemBuilder: (context, index) {
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if (index >= _items.length) return _buildLoadMoreIndicator();
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return _buildListCard(_items[index]);
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},
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);
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}
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Widget _buildLoadMoreIndicator() {
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return Padding(
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padding: const EdgeInsets.symmetric(vertical: 20),
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child: Center(
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child: _isLoading
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? SizedBox(width: 20, height: 20, child: CircularProgressIndicator(strokeWidth: 2, color: Theme.of(context).colorScheme.primary))
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: Text('没有更多了', style: TextStyle(fontSize: 12, color: Theme.of(context).colorScheme.onSurface.withValues(alpha: 0.3))),
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),
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);
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}
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Widget _buildListCard(Movie movie) {
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final colors = Theme.of(context).colorScheme;
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return GestureDetector(
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onTap: () => _onMovieTap(movie),
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onLongPress: () => _showDeleteDialog(context, movie),
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child: Container(
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margin: const EdgeInsets.only(bottom: 8),
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padding: const EdgeInsets.all(12),
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decoration: BoxDecoration(color: colors.surfaceContainerHigh, borderRadius: BorderRadius.circular(12)),
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child: Row(children: [
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Container(
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width: 48, height: 64,
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decoration: BoxDecoration(color: colors.outlineVariant, borderRadius: BorderRadius.circular(6)),
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clipBehavior: Clip.antiAlias,
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child: movie.posterPath != null && movie.posterPath!.isNotEmpty
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? FadeInLocalImage(path: movie.posterPath, fit: BoxFit.cover,
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errorWidget: Icon(Icons.movie_outlined, size: 22, color: colors.onSurface.withValues(alpha: 0.25)))
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: Icon(Icons.movie_outlined, size: 22, color: colors.onSurface.withValues(alpha: 0.25)),
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),
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const SizedBox(width: 12),
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Expanded(child: Column(crossAxisAlignment: CrossAxisAlignment.start, children: [
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Text(movie.title, maxLines: 1, overflow: TextOverflow.ellipsis,
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style: TextStyle(fontSize: 15, fontWeight: FontWeight.w600, color: colors.onSurface)),
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...[
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const SizedBox(height: 3),
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Text(_buildSubtitle(movie), maxLines: 1, overflow: TextOverflow.ellipsis,
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style: TextStyle(fontSize: 12, color: colors.onSurface.withValues(alpha: 0.35))),
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],
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const SizedBox(height: 6),
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if (movie.rating != null) AnimatedStarRating(rating: movie.rating!, starSize: 12, showNumber: true)
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else const SizedBox(height: 14),
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])),
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const SizedBox(width: 8),
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Icon(Icons.chevron_right, color: colors.onSurface.withValues(alpha: 0.2), size: 20),
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]),
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),
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);
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}
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String _buildSubtitle(Movie movie) {
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final parts = <String>[];
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if (movie.directors.isNotEmpty) parts.add(movie.directors.first);
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if (movie.actors.isNotEmpty) parts.add(movie.actors.take(2).join('、'));
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if (movie.genres.isNotEmpty) parts.add(movie.genres.take(2).join('、'));
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return parts.join(' · ');
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}
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// ─── 大图卡片样式 ───────────────────────────────────────
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Widget _buildCoverCardView() {
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return ListView.builder(
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controller: _scrollController,
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padding: const EdgeInsets.fromLTRB(16, 12, 16, 100),
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itemCount: _items.length + (_hasMore ? 1 : 0),
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itemBuilder: (context, index) {
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if (index >= _items.length) return _buildLoadMoreIndicator();
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return _buildCoverCard(_items[index]);
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},
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);
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}
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Widget _buildCoverCard(Movie movie) {
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final colors = Theme.of(context).colorScheme;
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return GestureDetector(
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onTap: () => _onMovieTap(movie),
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onLongPress: () => _showDeleteDialog(context, movie),
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child: Container(
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height: 200,
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margin: const EdgeInsets.only(bottom: 12),
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decoration: BoxDecoration(
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borderRadius: BorderRadius.circular(14),
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color: colors.surfaceContainerHigh,
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),
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clipBehavior: Clip.antiAlias,
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child: Stack(fit: StackFit.expand, children: [
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// 海报背景
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if (movie.posterPath != null && movie.posterPath!.isNotEmpty)
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FadeInLocalImage(path: movie.posterPath, fit: BoxFit.cover,
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errorWidget: Container(color: colors.surfaceContainerHighest))
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else
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Container(color: colors.surfaceContainerHighest,
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child: Icon(Icons.movie_outlined, size: 48, color: colors.onSurface.withValues(alpha: 0.15))),
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// 底部渐变遮罩
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Positioned.fill(
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child: DecoratedBox(
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decoration: BoxDecoration(
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gradient: LinearGradient(
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begin: Alignment.topCenter,
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end: Alignment.bottomCenter,
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colors: [Colors.transparent, Colors.black.withValues(alpha: 0.75)],
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stops: const [0.4, 1.0],
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),
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),
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),
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),
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// 底部信息
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Positioned(
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left: 14, right: 14, bottom: 14,
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child: Column(crossAxisAlignment: CrossAxisAlignment.start, mainAxisSize: MainAxisSize.min, children: [
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Text(movie.title, maxLines: 1, overflow: TextOverflow.ellipsis,
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style: const TextStyle(fontSize: 17, fontWeight: FontWeight.w600, color: Colors.white)),
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const SizedBox(height: 4),
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Row(children: [
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Expanded(
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child: Text(_buildSubtitle(movie), maxLines: 1, overflow: TextOverflow.ellipsis,
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style: TextStyle(fontSize: 12, color: Colors.white.withValues(alpha: 0.7))),
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),
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if (movie.rating != null) ...[
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const SizedBox(width: 8),
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Icon(Icons.star_rounded, size: 16, color: Colors.amber.shade400),
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const SizedBox(width: 2),
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Text(movie.rating!.toStringAsFixed(1),
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style: const TextStyle(fontSize: 13, fontWeight: FontWeight.w600, color: Colors.white)),
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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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Widget _buildCoverCardSkeleton() {
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final colors = Theme.of(context).colorScheme;
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return ListView.builder(
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padding: const EdgeInsets.fromLTRB(16, 12, 16, 100),
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itemCount: 4,
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itemBuilder: (_, __) => Container(
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height: 200,
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margin: const EdgeInsets.only(bottom: 12),
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decoration: BoxDecoration(
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color: colors.surfaceContainerHigh,
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borderRadius: BorderRadius.circular(14),
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),
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),
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);
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}
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void _showDeleteDialog(BuildContext context, Movie movie) {
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final colors = Theme.of(context).colorScheme;
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showDialog(
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context: context,
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builder: (ctx) => AlertDialog(
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backgroundColor: colors.surface, elevation: 0,
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shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(12)),
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title: Text('确认删除', style: TextStyle(fontSize: 18, fontWeight: FontWeight.w600, color: colors.onSurface)),
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content: Text('确定要删除《${movie.title}》吗？删除后可在回收站恢复。',
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style: TextStyle(fontSize: 14, color: colors.onSurface.withValues(alpha: 0.6), height: 1.5)),
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actions: [
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TextButton(onPressed: () => Navigator.pop(ctx),
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child: Text('取消', style: TextStyle(color: colors.onSurface.withValues(alpha: 0.6)))),
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ElevatedButton(
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onPressed: () async {
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await context.read<AppProvider>().removeMovie(movie.id);
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Navigator.pop(ctx);
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_loadFirst();
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},
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style: ElevatedButton.styleFrom(backgroundColor: colors.error, foregroundColor: colors.onError, elevation: 0,
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shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(8)),
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padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8)),
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child: const Text('删除'),
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),
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],
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actionsPadding: const EdgeInsets.symmetric(horizontal: 16, vertical: 12),
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),
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);
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}
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Widget _buildSkeleton() {
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final layoutStyle = context.read<AppProvider>().movieLayoutStyle;
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if (layoutStyle == 1) return _buildListSkeleton();
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if (layoutStyle == 2) return _buildCoverCardSkeleton();
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return const MovieSkeletonGrid();
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}
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Widget _buildListSkeleton() {
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final colors = Theme.of(context).colorScheme;
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return ListView.builder(
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padding: const EdgeInsets.fromLTRB(12, 8, 12, 100), itemCount: 6,
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itemBuilder: (_, __) => Container(
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margin: const EdgeInsets.only(bottom: 8), padding: const EdgeInsets.all(12),
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decoration: BoxDecoration(color: colors.surfaceContainerHigh, borderRadius: BorderRadius.circular(12)),
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child: const Row(children: [
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ShimmerSkeleton(width: 48, height: 64, borderRadius: 6), SizedBox(width: 12),
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Expanded(child: Column(crossAxisAlignment: CrossAxisAlignment.start, children: [
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ShimmerSkeleton(width: 160, height: 16), SizedBox(height: 6),
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ShimmerSkeleton(width: 100, height: 12), SizedBox(height: 6),
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ShimmerSkeleton(width: 70, height: 12),
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])),
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SizedBox(width: 8), ShimmerSkeleton(width: 20, height: 20, borderRadius: 10),
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]),
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),
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);
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}
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Widget _buildEmptyState(BuildContext context, int statusIndex) {
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final colors = Theme.of(context).colorScheme;
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final statusText = ['已看', '在看', '想看'][statusIndex];
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return Center(child: Column(mainAxisAlignment: MainAxisAlignment.center, children: [
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Container(width: 80, height: 80,
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decoration: BoxDecoration(color: colors.surfaceContainerHighest, borderRadius: BorderRadius.circular(20)),
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child: Icon(Icons.movie_outlined, size: 40, color: colors.onSurface.withValues(alpha: 0.25))),
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const SizedBox(height: 20),
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Text('暂无$statusText的影片', style: TextStyle(fontSize: 16, color: colors.onSurface.withValues(alpha: 0.4))),
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]));
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}
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}
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