😋 初始化仓库
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272
lib/screens/home_screen.dart
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272
lib/screens/home_screen.dart
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import 'package:flutter/material.dart';
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import 'package:provider/provider.dart';
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import '../providers/auth_provider.dart';
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import '../providers/evaluation_provider.dart';
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import '../widgets/course_card.dart';
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import 'progress_screen.dart';
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import 'settings_screen.dart';
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/// Home screen displaying course list and evaluation controls
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///
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/// Shows list of courses that need evaluation
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/// Provides batch evaluation functionality
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class HomeScreen extends StatefulWidget {
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const HomeScreen({super.key});
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@override
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State<HomeScreen> createState() => _HomeScreenState();
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}
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class _HomeScreenState extends State<HomeScreen> {
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@override
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void initState() {
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super.initState();
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// Defer loading until after the first frame
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WidgetsBinding.instance.addPostFrameCallback((_) {
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_loadCourses();
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});
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}
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Future<void> _loadCourses() async {
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if (!mounted) return;
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final authProvider = Provider.of<AuthProvider>(context, listen: false);
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final evaluationProvider = Provider.of<EvaluationProvider>(
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context,
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listen: false,
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);
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print('🔍 _loadCourses called');
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print('🔍 authProvider.connection: ${authProvider.connection}');
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print('🔍 authProvider.isAuthenticated: ${authProvider.isAuthenticated}');
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// Set connection for evaluation provider
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if (authProvider.connection != null) {
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print('🔍 Setting connection and loading courses...');
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evaluationProvider.setConnection(authProvider.connection);
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final success = await evaluationProvider.loadCourses();
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print('🔍 loadCourses result: $success');
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print('🔍 courses count: ${evaluationProvider.courses.length}');
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if (!success) {
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print('❌ Error: ${evaluationProvider.errorMessage}');
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}
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} else {
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print('❌ No connection available');
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}
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}
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Future<void> _handleRefresh() async {
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await _loadCourses();
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}
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Future<void> _handleBatchEvaluation() async {
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final evaluationProvider = Provider.of<EvaluationProvider>(
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context,
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listen: false,
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);
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// Check if there are pending courses
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if (evaluationProvider.pendingCourses.isEmpty) {
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if (!mounted) return;
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ScaffoldMessenger.of(
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context,
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).showSnackBar(const SnackBar(content: Text('没有待评课程')));
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return;
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}
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// Navigate to progress screen
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if (!mounted) return;
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Navigator.of(
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context,
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).push(MaterialPageRoute(builder: (context) => const ProgressScreen()));
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// Start concurrent batch evaluation
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await evaluationProvider.startConcurrentBatchEvaluation();
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}
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@override
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Widget build(BuildContext context) {
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return Scaffold(
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appBar: AppBar(
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title: const Text('课程评教'),
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actions: [
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IconButton(
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icon: const Icon(Icons.refresh),
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onPressed: _handleRefresh,
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tooltip: '刷新',
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),
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IconButton(
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icon: const Icon(Icons.settings),
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onPressed: () {
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Navigator.of(context).push(
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MaterialPageRoute(builder: (context) => const SettingsScreen()),
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);
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},
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tooltip: '设置',
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),
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],
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),
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body: Consumer<EvaluationProvider>(
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builder: (context, evaluationProvider, child) {
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if (evaluationProvider.state == EvaluationState.loading) {
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return const Center(child: CircularProgressIndicator());
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}
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if (evaluationProvider.state == EvaluationState.error) {
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return Center(
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child: Column(
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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Icon(
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Icons.error_outline,
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size: 64,
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color: Theme.of(context).colorScheme.error,
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),
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const SizedBox(height: 16),
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Text(
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evaluationProvider.errorMessage ?? '加载失败',
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style: Theme.of(context).textTheme.bodyLarge,
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textAlign: TextAlign.center,
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),
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const SizedBox(height: 16),
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ElevatedButton.icon(
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onPressed: _handleRefresh,
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icon: const Icon(Icons.refresh),
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label: const Text('重试'),
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),
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],
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),
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);
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}
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final courses = evaluationProvider.courses;
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final pendingCount = evaluationProvider.pendingCourses.length;
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final evaluatedCount = evaluationProvider.evaluatedCourses.length;
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if (courses.isEmpty) {
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return Center(
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child: Column(
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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Icon(
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Icons.check_circle_outline,
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size: 64,
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color: Theme.of(context).colorScheme.primary,
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),
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const SizedBox(height: 16),
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Text(
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'暂无待评课程',
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style: Theme.of(context).textTheme.headlineSmall,
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),
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const SizedBox(height: 8),
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Text(
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'下拉刷新以检查新课程',
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style: Theme.of(context).textTheme.bodyMedium?.copyWith(
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color: Theme.of(context).colorScheme.onSurfaceVariant,
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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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return Column(
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children: [
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// Statistics card
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Container(
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margin: const EdgeInsets.all(16),
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padding: const EdgeInsets.all(16),
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decoration: BoxDecoration(
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color: Theme.of(context).colorScheme.primaryContainer,
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borderRadius: BorderRadius.circular(12),
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),
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child: Row(
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mainAxisAlignment: MainAxisAlignment.spaceAround,
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children: [
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_buildStatItem(
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context,
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'总计',
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courses.length.toString(),
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Icons.list_alt,
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),
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_buildStatItem(
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context,
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'待评',
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pendingCount.toString(),
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Icons.pending_actions,
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),
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_buildStatItem(
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context,
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'已评',
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evaluatedCount.toString(),
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Icons.check_circle,
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),
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],
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),
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),
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// Course list
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Expanded(
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child: RefreshIndicator(
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onRefresh: _handleRefresh,
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child: ListView.builder(
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padding: const EdgeInsets.symmetric(horizontal: 16),
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itemCount: courses.length,
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itemBuilder: (context, index) {
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final course = courses[index];
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return CourseCard(course: course);
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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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floatingActionButton: Consumer<EvaluationProvider>(
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builder: (context, evaluationProvider, child) {
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final hasPending = evaluationProvider.pendingCourses.isNotEmpty;
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final isEvaluating =
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evaluationProvider.state == EvaluationState.evaluating;
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if (!hasPending || isEvaluating) {
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return const SizedBox.shrink();
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}
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return FloatingActionButton.extended(
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onPressed: _handleBatchEvaluation,
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icon: const Icon(Icons.play_arrow),
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label: const Text('批量评教'),
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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 _buildStatItem(
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BuildContext context,
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String label,
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String value,
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IconData icon,
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) {
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return Column(
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children: [
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Icon(icon, color: Theme.of(context).colorScheme.onPrimaryContainer),
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const SizedBox(height: 4),
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Text(
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value,
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style: Theme.of(context).textTheme.headlineSmall?.copyWith(
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color: Theme.of(context).colorScheme.onPrimaryContainer,
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fontWeight: FontWeight.bold,
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),
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),
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Text(
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label,
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style: Theme.of(context).textTheme.bodySmall?.copyWith(
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color: Theme.of(context).colorScheme.onPrimaryContainer,
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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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