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优化状态切换

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DelLevin-Home
2026-08-12 21:01:54 +08:00
parent 98d8350693
commit e543618139
8 changed files with 957 additions and 606 deletions
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537
lib/pages/book/book_tab_page.dart
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@@ -15,7 +15,10 @@ import '../../widgets/detail_placeholder.dart';
import 'book_detail_page.dart';
import 'book_add_page.dart';
/// 阅读标签页（分页 + 触底加载）
/// 状态索引 → 状态值
const _bookStatusMap = {0: 'read', 1: 'reading', 2: 'want_to_read', 3: 'abandoned'};
/// 阅读标签页（PageView 分页 + 触底加载），左右滑动丝滑切换
class BookTabPage extends StatefulWidget {
const BookTabPage({super.key});
@@ -24,147 +27,57 @@ class BookTabPage extends StatefulWidget {
}
class _BookTabPageState extends State<BookTabPage> {
int _layoutStyle = 0;
final List<Book> _items = [];
bool _hasMore = true;
bool _isLoading = false;
int _offset = 0;
int _lastStatusIndex = -1;
bool _initialized = false;
late ScrollController _scrollController;
AppProvider? _provider;
int _lastScrollSignal = 0;
int _lastEditRefreshCounter = 0;
int _prevBookCount = -1;
int _prevSortMode = -1;
double _dragDelta = 0.0; // 当前拖动偏移量
void _onBookTap(Book book) {
if (Breakpoint.isWideContent(context)) {
context.read<AppProvider>().selectBook(book);
} else {
Navigator.pushNamed(context, '/book-detail', arguments: book);
}
}
static const _statusMap = {0: 'read', 1: 'reading', 2: 'want_to_read', 3: 'abandoned'};
late PageController _pageController;
int _currentPage = 0; // PageView 当前页的唯一真源
int? _pendingTarget; // 待跟随的页，避免重复调度动画
int _lastModeSignature = -1; // 编码 wall 模式，检测书架/状态切换
bool _modeInitialized = false; // 吞掉首次构建的伪"变化"
@override
void initState() {
super.initState();
_layoutStyle = UserPrefs().bookLayoutStyle;
_scrollController = ScrollController()..addListener(_onScroll);
_pageController = PageController();
// 应用启动时保存的初始索引（可能 > 0）
WidgetsBinding.instance.addPostFrameCallback((_) {
if (!mounted) return;
final provider = context.read<AppProvider>();
_provider = provider;
provider.addListener(_onDataChanged);
_loadFirst();
final p = context.read<AppProvider>();
final initial = _activeIndexFor(p).clamp(0, _pageCountFor(p) - 1);
_currentPage = initial;
if (_pageController.hasClients && initial != 0) _pageController.jumpToPage(initial);
});
}
@override
void dispose() {
_provider?.removeListener(_onDataChanged);
_scrollController.dispose();
_pageController.dispose();
super.dispose();
}
void _onDataChanged() {
if (!_initialized || !mounted) return;
final provider = context.read<AppProvider>();
int _pageCountFor(AppProvider p) => p.bookshelfMode ? 1 : 4;
// 检查回到顶部信号
if (provider.scrollToTopSignal != _lastScrollSignal && provider.scrollToTopSignal > 0) {
_lastScrollSignal = provider.scrollToTopSignal;
if (_scrollController.hasClients) {
_scrollController.animateTo(0, duration: const Duration(milliseconds: 300), curve: Curves.easeOut);
}
}
int _activeIndexFor(AppProvider p) => p.bookshelfMode ? 0 : p.bookStatusIndex;
// 仅在数据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
final statusChanged = provider.bookStatusIndex != _lastStatusIndex;
final sortModeChanged = UserPrefs().bookSortMode != _prevSortMode;
final countChanged = provider.books.length != _prevBookCount;
final editRefreshed = provider.editRefreshCounter > _lastEditRefreshCounter;
if (editRefreshed && provider.lastEditedItemId != null) {
// 就地更新被编辑的条目，不重置分页
_lastEditRefreshCounter = provider.editRefreshCounter;
_prevBookCount = provider.books.length;
final editedId = provider.lastEditedItemId!;
final idx = _items.indexWhere((b) => b.id == editedId);
if (idx != -1) {
final updated = provider.books.where((b) => b.id == editedId).firstOrNull;
if (updated != null) {
setState(() { _items[idx] = updated; });
}
}
return;
}
if (statusChanged || sortModeChanged || countChanged || editRefreshed) {
_prevSortMode = UserPrefs().bookSortMode;
_prevBookCount = provider.books.length;
_loadFirst();
}
if (editRefreshed) {
_lastEditRefreshCounter = provider.editRefreshCounter;
}
}
void _onScroll() {
if (_scrollController.position.pixels >= _scrollController.position.maxScrollExtent - 200) {
_loadMore();
}
}
Future<void> _loadFirst() async {
final provider = context.read<AppProvider>();
final isWallMode = provider.bookshelfMode;
final statusIdx = provider.bookStatusIndex;
_lastStatusIndex = statusIdx;
_initialized = true;
// 书架模式：不筛选状态，使用用户选择的排序（默认创建时间）
final status = isWallMode ? null : (_statusMap[statusIdx] ?? 'read');
final sortMode = UserPrefs().bookSortMode;
setState(() { _isLoading = true; _offset = 0; _hasMore = true; });
final list = await provider.loadBooksPaged(status: status, offset: 0, sortMode: sortMode);
if (!mounted) return;
setState(() { _items.clear(); _items.addAll(list); _offset = list.length; _hasMore = list.length >= 20; _isLoading = false; });
}
Future<void> _loadMore() async {
if (_isLoading || !_hasMore) return;
setState(() => _isLoading = true);
final provider = context.read<AppProvider>();
final isWallMode = provider.bookshelfMode;
final status = isWallMode ? null : (_statusMap[provider.bookStatusIndex] ?? 'read');
final sortMode = UserPrefs().bookSortMode;
final list = await provider.loadBooksPaged(status: status, offset: _offset, sortMode: sortMode);
if (!mounted) return;
setState(() { _items.addAll(list); _offset += list.length; _hasMore = list.length >= 20; _isLoading = false; });
}
Future<void> _refresh() async {
await context.read<AppProvider>().loadBooks();
await _loadFirst();
}
int _modeSignature(AppProvider p) => p.bookshelfMode ? 1 : 0;
@override
Widget build(BuildContext context) {
final isWideContent = Breakpoint.isWideContent(context);
final provider = context.watch<AppProvider>();
final isWallMode = provider.bookshelfMode;
final masterContent = Column(children: [
if (!isWallMode) const BookStatusBar(),
Expanded(
child: Stack(
children: [
_buildBody(context),
if (!isWallMode) const TopFadeScrim(),
],
final masterContent = Column(
children: [
if (!isWallMode) const BookStatusBar(),
Expanded(
child: Stack(
children: [
_buildPageView(provider),
if (!isWallMode) const TopFadeScrim(),
],
),
),
),
]);
],
);
if (!isWideContent) return masterContent;
@@ -180,76 +93,264 @@ class _BookTabPageState extends State<BookTabPage> {
);
}
Widget _buildBody(BuildContext context) {
final colors = Theme.of(context).colorScheme;
Widget _buildPageView(AppProvider provider) {
final wall = provider.bookshelfMode;
final pageCount = _pageCountFor(provider);
final mode = wall ? 1 : 0;
// 用 GestureDetector 包裹，左右滑动切换状态
return GestureDetector(
onHorizontalDragStart: (_) => _dragDelta = 0.0,
onHorizontalDragUpdate: (details) => setState(() => _dragDelta += details.primaryDelta ?? 0),
onHorizontalDragEnd: (details) {
final velocity = details.primaryVelocity;
if ((velocity ?? 0).abs() < 80) {
setState(() => _dragDelta = 0.0);
return;
}
final direction = (velocity ?? 0) > 0 ? -1 : 1; // 右滑→上一个，左滑→下一个
final provider = context.read<AppProvider>();
final currentIndex = provider.bookStatusIndex;
final newIndex = (currentIndex + direction + 4) % 4;
setState(() => _dragDelta = 0.0);
provider.setBookStatusIndex(newIndex);
},
child: TweenAnimationBuilder<double>(
tween: Tween(begin: 0.0, end: _dragDelta.clamp(-100.0, 100.0)),
duration: const Duration(milliseconds: 150),
curve: Curves.easeOut,
builder: (context, value, child) {
return Transform.translate(offset: Offset(value, 0), child: child);
},
child: Consumer<AppProvider>(builder: (context, provider, _) {
if (_initialized && provider.bookStatusIndex != _lastStatusIndex) {
_lastStatusIndex = provider.bookStatusIndex;
WidgetsBinding.instance.addPostFrameCallback((_) => _loadFirst());
}
final content = () {
if (_items.isEmpty && _isLoading) return _buildSkeleton();
if (_items.isEmpty) {
return RefreshIndicator(onRefresh: _refresh, color: colors.primary, backgroundColor: colors.surface,
child: ListView(physics: const AlwaysScrollableScrollPhysics(), children: [_buildEmptyState(context, provider.bookStatusIndex)]));
}
return RefreshIndicator(onRefresh: _refresh, color: colors.primary, backgroundColor: colors.surface,
child: _layoutStyle == 1 ? _buildListView() : _buildGridView());
}();
return content;
}),
// (a) 首次构建作为基线，不当成模式切换
if (!_modeInitialized) {
_modeInitialized = true;
_lastModeSignature = _modeSignature(provider);
}
// (b) 模式切换（书架 <-> 状态）：跳到第 0 页 + 重置索引
else if (_modeSignature(provider) != _lastModeSignature) {
_lastModeSignature = _modeSignature(provider);
WidgetsBinding.instance.addPostFrameCallback((_) {
if (!mounted || !_pageController.hasClients) return;
_currentPage = 0;
_pendingTarget = null;
if (!wall) provider.setBookStatusIndex(0);
_pageController.jumpToPage(0);
});
}
// (c) 外部索引变化（bar 点击等）：动画跟随
final target = _activeIndexFor(provider).clamp(0, pageCount - 1);
if (pageCount > 1 && _pageController.hasClients && target != _currentPage && _pendingTarget != target) {
_pendingTarget = target;
WidgetsBinding.instance.addPostFrameCallback((_) {
if (!mounted || !_pageController.hasClients) return;
_pageController.animateToPage(
target,
duration: const Duration(milliseconds: 300),
curve: Curves.easeInOut,
);
});
}
return PageView.builder(
controller: _pageController,
itemCount: pageCount,
allowImplicitScrolling: true, // 拖动时预构建相邻页 → 无白色空隙
onPageChanged: (index) => _onPageChanged(index, provider),
itemBuilder: (context, index) => _BookTabView(
key: ValueKey('$mode-$index'), // 模式切换时全部重建
index: index,
mode: mode,
),
);
}
Widget _buildGridView() {
return LayoutBuilder(builder: (context, constraints) {
final crossAxisCount = responsiveCrossAxisCount(constraints.maxWidth, minItemWidth: 110);
return GridView.builder(controller: _scrollController,
padding: const EdgeInsets.fromLTRB(16, 16, 16, 100),
gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(crossAxisCount: crossAxisCount, childAspectRatio: 0.55, crossAxisSpacing: 12, mainAxisSpacing: 16),
itemCount: _items.length + (_hasMore ? 1 : 0),
itemBuilder: (context, index) {
if (index >= _items.length) return _buildLoadMore();
final item = _items[index];
final provider = context.read<AppProvider>();
return BookListItem(
book: item,
selected: Breakpoint.isWideContent(context) && provider.selectedBook?.id == item.id,
onTap: () => _onBookTap(item),
);
},
);
void _onPageChanged(int index, AppProvider provider) {
_currentPage = index;
_pendingTarget = null;
final wall = provider.bookshelfMode;
final cur = wall ? 0 : provider.bookStatusIndex;
// 回显守卫：仅在真实拖动导致索引变化时推送，避免死循环
if (cur != index) {
if (!wall) provider.setBookStatusIndex(index);
}
}
}
/// 单页：独立持有列表数据、滚动与分页状态，滑走再滑回保留状态
class _BookTabView extends StatefulWidget {
final int index; // 0..pageCount-1
final int mode; // 0=status, 1=wall(书架)
const _BookTabView({super.key, required this.index, required this.mode});
@override
State<_BookTabView> createState() => _BookTabViewState();
}
class _BookTabViewState extends State<_BookTabView>
with AutomaticKeepAliveClientMixin {
final List<Book> _items = [];
bool _hasMore = true;
bool _isLoading = false;
int _offset = 0;
bool _initialized = false;
int _layoutStyle = 0;
late ScrollController _scrollController;
AppProvider? _provider;
int _lastScrollSignal = 0;
int _lastEditRefreshCounter = 0;
int _prevBookCount = -1;
int _prevSortMode = -1;
String? get _status => widget.mode == 0 ? _bookStatusMap[widget.index] : null;
@override
bool get wantKeepAlive => true;
@override
void initState() {
super.initState();
_layoutStyle = UserPrefs().bookLayoutStyle;
_scrollController = ScrollController()..addListener(_onScroll);
WidgetsBinding.instance.addPostFrameCallback((_) {
if (!mounted) return;
final p = context.read<AppProvider>();
_provider = p;
_lastEditRefreshCounter = p.editRefreshCounter;
_lastScrollSignal = p.scrollToTopSignal;
_prevBookCount = p.books.length;
_prevSortMode = UserPrefs().bookSortMode;
p.addListener(_onDataChanged);
_loadFirst();
});
}
@override
void dispose() {
_provider?.removeListener(_onDataChanged);
_scrollController.dispose();
super.dispose();
}
void _onDataChanged() {
if (!_initialized || !mounted) return;
final p = context.read<AppProvider>();
// 回到顶部信号：每页滚自己的 controller
if (p.scrollToTopSignal != _lastScrollSignal) {
_lastScrollSignal = p.scrollToTopSignal;
if (_scrollController.hasClients) {
_scrollController.animateTo(0,
duration: const Duration(milliseconds: 300), curve: Curves.easeOut);
}
}
// 就地编辑：更新本页匹配项，不重置分页
if (p.editRefreshCounter > _lastEditRefreshCounter && p.lastEditedItemId != null) {
_lastEditRefreshCounter = p.editRefreshCounter;
_prevBookCount = p.books.length;
final id = p.lastEditedItemId!;
final i = _items.indexWhere((b) => b.id == id);
if (i != -1) {
final u = p.books.where((b) => b.id == id).firstOrNull;
if (u != null) setState(() => _items[i] = u);
}
return;
}
// 排序/数量变化才重新拉取（布局变化由 context.select 原地重渲染）
final sortChanged = UserPrefs().bookSortMode != _prevSortMode;
final countChanged = p.books.length != _prevBookCount;
if (sortChanged || countChanged) {
_prevSortMode = UserPrefs().bookSortMode;
_prevBookCount = p.books.length;
_loadFirst();
}
}
void _onScroll() {
if (_scrollController.position.pixels >= _scrollController.position.maxScrollExtent - 200) {
_loadMore();
}
}
Future<void> _loadFirst() async {
final provider = context.read<AppProvider>();
final sortMode = UserPrefs().bookSortMode;
_initialized = true;
setState(() { _isLoading = true; _offset = 0; _hasMore = true; });
final list = await provider.loadBooksPaged(status: _status, offset: 0, sortMode: sortMode);
if (!mounted) return;
setState(() {
_items.clear();
_items.addAll(list);
_offset = list.length;
_hasMore = list.length >= 20;
_isLoading = false;
});
}
Future<void> _loadMore() async {
if (_isLoading || !_hasMore) return;
setState(() => _isLoading = true);
final provider = context.read<AppProvider>();
final sortMode = UserPrefs().bookSortMode;
final list = await provider.loadBooksPaged(status: _status, offset: _offset, sortMode: sortMode);
if (!mounted) return;
setState(() {
_items.addAll(list);
_offset += list.length;
_hasMore = list.length >= 20;
_isLoading = false;
});
}
Future<void> _refresh() async {
await context.read<AppProvider>().loadBooks();
await _loadFirst();
}
void _onBookTap(Book book) {
if (Breakpoint.isWideContent(context)) {
context.read<AppProvider>().selectBook(book);
} else {
Navigator.pushNamed(context, '/book-detail', arguments: book);
}
}
@override
Widget build(BuildContext context) {
super.build(context);
final colors = Theme.of(context).colorScheme;
final content = () {
if (_items.isEmpty && _isLoading) return _buildSkeleton(_layoutStyle);
if (_items.isEmpty) {
return RefreshIndicator(
onRefresh: _refresh,
color: colors.primary,
backgroundColor: colors.surface,
child: ListView(
physics: const AlwaysScrollableScrollPhysics(),
children: [_buildEmptyState()],
),
);
}
return RefreshIndicator(
onRefresh: _refresh,
color: colors.primary,
backgroundColor: colors.surface,
child: _layoutStyle == 1 ? _buildListView() : _buildGridView(),
);
}();
return content;
}
Widget _buildGridView() {
return LayoutBuilder(
builder: (context, constraints) {
final crossAxisCount = responsiveCrossAxisCount(constraints.maxWidth, minItemWidth: 110);
return GridView.builder(
controller: _scrollController,
padding: const EdgeInsets.fromLTRB(16, 16, 16, 100),
gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(
crossAxisCount: crossAxisCount, childAspectRatio: 0.55, crossAxisSpacing: 12, mainAxisSpacing: 16,
),
itemCount: _items.length + (_hasMore ? 1 : 0),
itemBuilder: (context, index) {
if (index >= _items.length) return _buildLoadMore();
final item = _items[index];
final provider = context.read<AppProvider>();
return BookListItem(
book: item,
selected: Breakpoint.isWideContent(context) && provider.selectedBook?.id == item.id,
onTap: () => _onBookTap(item),
);
},
);
},
);
}
Widget _buildListView() {
return ListView.builder(controller: _scrollController,
return ListView.builder(
controller: _scrollController,
padding: const EdgeInsets.fromLTRB(12, 8, 12, 100),
itemCount: _items.length + (_hasMore ? 1 : 0),
itemBuilder: (context, index) {
@@ -260,10 +361,13 @@ class _BookTabPageState extends State<BookTabPage> {
}
Widget _buildLoadMore() {
return Padding(padding: const EdgeInsets.symmetric(vertical: 20),
child: Center(child: _isLoading
? SizedBox(width: 20, height: 20, child: CircularProgressIndicator(strokeWidth: 2, color: Theme.of(context).colorScheme.primary))
: Text('没有更多了', style: TextStyle(fontSize: 12, color: Theme.of(context).colorScheme.onSurface.withValues(alpha: 0.3)))),
return Padding(
padding: const EdgeInsets.symmetric(vertical: 20),
child: Center(
child: _isLoading
? SizedBox(width: 20, height: 20, child: CircularProgressIndicator(strokeWidth: 2, color: Theme.of(context).colorScheme.primary))
: Text('没有更多了', style: TextStyle(fontSize: 12, color: Theme.of(context).colorScheme.onSurface.withValues(alpha: 0.3))),
),
);
}
@@ -272,10 +376,13 @@ class _BookTabPageState extends State<BookTabPage> {
return GestureDetector(
onTap: () => _onBookTap(book),
onLongPress: () => _showDeleteDialog(context, book),
child: Container(margin: const EdgeInsets.only(bottom: 8), padding: const EdgeInsets.all(12),
child: Container(
margin: const EdgeInsets.only(bottom: 8),
padding: const EdgeInsets.all(12),
decoration: BoxDecoration(color: colors.surfaceContainerHigh, borderRadius: BorderRadius.circular(12)),
child: Row(children: [
Container(width: 48, height: 64,
Container(
width: 48, height: 64,
decoration: BoxDecoration(color: colors.outlineVariant, borderRadius: BorderRadius.circular(6)),
clipBehavior: Clip.antiAlias,
child: book.coverPath != null && book.coverPath!.isNotEmpty
@@ -287,7 +394,8 @@ class _BookTabPageState extends State<BookTabPage> {
Expanded(child: Column(crossAxisAlignment: CrossAxisAlignment.start, children: [
Text(book.title, maxLines: 1, overflow: TextOverflow.ellipsis,
style: TextStyle(fontSize: 15, fontWeight: FontWeight.w600, color: colors.onSurface)),
if (book.authors.isNotEmpty) ...[const SizedBox(height: 3),
if (book.authors.isNotEmpty) ...[
const SizedBox(height: 3),
Text(book.authors.take(2).join('、'), maxLines: 1, overflow: TextOverflow.ellipsis,
style: TextStyle(fontSize: 12, color: colors.onSurface.withValues(alpha: 0.35))),
],
@@ -304,36 +412,47 @@ class _BookTabPageState extends State<BookTabPage> {
void _showDeleteDialog(BuildContext context, Book book) {
final colors = Theme.of(context).colorScheme;
showDialog(context: context, builder: (ctx) => AlertDialog(
backgroundColor: colors.surface, elevation: 0, shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(12)),
title: Text('确认删除', style: TextStyle(fontSize: 18, fontWeight: FontWeight.w600, color: colors.onSurface)),
content: Text('确定要删除《${book.title}》吗？删除后可在回收站恢复。',
style: TextStyle(fontSize: 14, color: colors.onSurface.withValues(alpha: 0.6), height: 1.5)),
actions: [
TextButton(onPressed: () => Navigator.pop(ctx), child: Text('取消', style: TextStyle(color: colors.onSurface.withValues(alpha: 0.6)))),
ElevatedButton(onPressed: () async { await context.read<AppProvider>().removeBook(book.id); if (!ctx.mounted) return; Navigator.pop(ctx); if (mounted) _loadFirst(); },
style: ElevatedButton.styleFrom(backgroundColor: colors.error, foregroundColor: colors.onError, elevation: 0,
shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(8)), padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8)),
child: const Text('删除'),
),
],
actionsPadding: const EdgeInsets.symmetric(horizontal: 16, vertical: 12),
));
showDialog(
context: context,
builder: (ctx) => AlertDialog(
backgroundColor: colors.surface, elevation: 0,
shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(12)),
title: Text('确认删除', style: TextStyle(fontSize: 18, fontWeight: FontWeight.w600, color: colors.onSurface)),
content: Text('确定要删除《${book.title}》吗？删除后可在回收站恢复。',
style: TextStyle(fontSize: 14, color: colors.onSurface.withValues(alpha: 0.6), height: 1.5)),
actions: [
TextButton(onPressed: () => Navigator.pop(ctx),
child: Text('取消', style: TextStyle(color: colors.onSurface.withValues(alpha: 0.6)))),
ElevatedButton(
onPressed: () async {
await context.read<AppProvider>().removeBook(book.id);
if (!ctx.mounted) return;
Navigator.pop(ctx);
if (mounted) _loadFirst();
},
style: ElevatedButton.styleFrom(backgroundColor: colors.error, foregroundColor: colors.onError, elevation: 0,
shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(8)),
padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8)),
child: const Text('删除'),
),
],
actionsPadding: const EdgeInsets.symmetric(horizontal: 16, vertical: 12),
),
);
}
Widget _buildSkeleton() => _layoutStyle == 1 ? const MovieSkeletonGrid() : const BookSkeletonGrid();
Widget _buildSkeleton(int layoutStyle) => layoutStyle == 1 ? const MovieSkeletonGrid() : const BookSkeletonGrid();
Widget _buildEmptyState(BuildContext context, int statusIndex) {
Widget _buildEmptyState() {
final colors = Theme.of(context).colorScheme;
final provider = context.read<AppProvider>();
final isWallMode = provider.bookshelfMode;
final statusText = isWallMode ? '' : ['已读', '在读', '想读', '弃读'][statusIndex];
final statusText = widget.mode == 1 ? '' : ['已读', '在读', '想读', '弃读'][widget.index];
return Center(child: Column(mainAxisAlignment: MainAxisAlignment.center, children: [
Container(width: 80, height: 80,
decoration: BoxDecoration(color: colors.surfaceContainerHighest, borderRadius: BorderRadius.circular(20)),
child: Icon(Icons.menu_book_outlined, size: 40, color: colors.onSurface.withValues(alpha: 0.25))),
const SizedBox(height: 20),
Text(isWallMode ? '暂无书籍' : '暂无$statusText的书籍', style: TextStyle(fontSize: 16, color: colors.onSurface.withValues(alpha: 0.4))),
Text(widget.mode == 1 ? '暂无书籍' : '暂无$statusText的书籍',
style: TextStyle(fontSize: 16, color: colors.onSurface.withValues(alpha: 0.4))),
]));
}
}
}