781 lines
23 KiB
Dart
781 lines
23 KiB
Dart
import 'package:flutter/material.dart';
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import '../models/reading_exercise_model.dart';
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/// 阅读练习详情页面
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class ReadingExerciseScreen extends StatefulWidget {
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final ReadingExercise exercise;
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const ReadingExerciseScreen({
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super.key,
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required this.exercise,
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});
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@override
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State<ReadingExerciseScreen> createState() => _ReadingExerciseScreenState();
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}
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class _ReadingExerciseScreenState extends State<ReadingExerciseScreen>
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with TickerProviderStateMixin {
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late TabController _tabController;
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Map<String, int> userAnswers = {};
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bool showResults = false;
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int score = 0;
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@override
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void initState() {
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super.initState();
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_tabController = TabController(length: 2, vsync: this);
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}
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@override
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void dispose() {
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_tabController.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 Scaffold(
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backgroundColor: const Color(0xFFF5F5F5),
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appBar: AppBar(
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backgroundColor: Colors.transparent,
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elevation: 0,
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leading: IconButton(
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icon: const Icon(Icons.arrow_back, color: Colors.black87),
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onPressed: () => Navigator.of(context).pop(),
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),
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title: Text(
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widget.exercise.title,
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style: const TextStyle(
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color: Colors.black87,
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fontSize: 16,
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fontWeight: FontWeight.w600,
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),
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),
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centerTitle: true,
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bottom: TabBar(
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controller: _tabController,
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labelColor: const Color(0xFF2196F3),
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unselectedLabelColor: Colors.grey,
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indicatorColor: const Color(0xFF2196F3),
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tabs: const [
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Tab(text: '阅读文章'),
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Tab(text: '练习题'),
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],
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),
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),
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body: TabBarView(
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controller: _tabController,
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children: [
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_buildArticleTab(),
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_buildQuestionsTab(),
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],
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),
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);
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}
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Widget _buildArticleTab() {
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return SingleChildScrollView(
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padding: const EdgeInsets.all(16),
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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_buildArticleHeader(),
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const SizedBox(height: 20),
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_buildArticleContent(),
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const SizedBox(height: 20),
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_buildArticleFooter(),
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],
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),
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);
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}
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Widget _buildArticleHeader() {
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return Container(
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padding: const EdgeInsets.all(20),
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decoration: BoxDecoration(
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color: Colors.white,
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borderRadius: BorderRadius.circular(16),
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boxShadow: [
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BoxShadow(
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color: Colors.black.withOpacity(0.05),
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blurRadius: 10,
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offset: const Offset(0, 2),
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),
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],
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),
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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Row(
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children: [
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Expanded(
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child: Text(
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widget.exercise.title,
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style: const TextStyle(
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fontSize: 20,
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fontWeight: FontWeight.bold,
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),
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),
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),
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Container(
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padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 4),
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decoration: BoxDecoration(
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color: _getDifficultyColor(widget.exercise.difficulty),
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borderRadius: BorderRadius.circular(12),
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),
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child: Text(
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_getDifficultyLabel(widget.exercise.difficulty),
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style: const TextStyle(
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fontSize: 12,
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color: Colors.white,
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fontWeight: FontWeight.bold,
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),
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),
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),
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],
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),
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const SizedBox(height: 12),
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Text(
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widget.exercise.summary,
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style: const TextStyle(
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fontSize: 14,
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color: Colors.grey,
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),
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),
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const SizedBox(height: 16),
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Row(
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children: [
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_buildInfoChip(Icons.access_time, '${widget.exercise.estimatedTime}分钟'),
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const SizedBox(width: 12),
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_buildInfoChip(Icons.text_fields, '${widget.exercise.wordCount}词'),
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const SizedBox(width: 12),
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_buildInfoChip(Icons.quiz, '${widget.exercise.questions.length}题'),
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],
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),
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if (widget.exercise.tags.isNotEmpty) ...[
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const SizedBox(height: 12),
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Wrap(
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spacing: 6,
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runSpacing: 6,
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children: widget.exercise.tags.map((tag) => Container(
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padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 4),
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decoration: BoxDecoration(
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color: Colors.grey[200],
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borderRadius: BorderRadius.circular(12),
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),
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child: Text(
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tag,
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style: const TextStyle(
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fontSize: 12,
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color: Colors.grey,
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),
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),
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)).toList(),
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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 _buildInfoChip(IconData icon, String text) {
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return Container(
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padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 4),
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decoration: BoxDecoration(
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color: Colors.grey[100],
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borderRadius: BorderRadius.circular(8),
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),
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child: Row(
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mainAxisSize: MainAxisSize.min,
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children: [
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Icon(
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icon,
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size: 14,
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color: Colors.grey[600],
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),
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const SizedBox(width: 4),
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Text(
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text,
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style: TextStyle(
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fontSize: 12,
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color: Colors.grey[600],
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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 _buildArticleContent() {
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return Container(
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padding: const EdgeInsets.all(20),
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decoration: BoxDecoration(
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color: Colors.white,
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borderRadius: BorderRadius.circular(16),
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boxShadow: [
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BoxShadow(
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color: Colors.black.withOpacity(0.05),
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blurRadius: 10,
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offset: const Offset(0, 2),
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),
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],
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),
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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const Text(
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'文章内容',
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style: TextStyle(
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fontSize: 18,
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fontWeight: FontWeight.bold,
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),
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),
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const SizedBox(height: 16),
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Text(
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widget.exercise.content,
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style: const TextStyle(
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fontSize: 16,
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height: 1.6,
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color: Colors.black87,
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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 _buildArticleFooter() {
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return Container(
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padding: const EdgeInsets.all(20),
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decoration: BoxDecoration(
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color: Colors.white,
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borderRadius: BorderRadius.circular(16),
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boxShadow: [
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BoxShadow(
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color: Colors.black.withOpacity(0.05),
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blurRadius: 10,
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offset: const Offset(0, 2),
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),
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],
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),
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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const Text(
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'文章信息',
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style: TextStyle(
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fontSize: 18,
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fontWeight: FontWeight.bold,
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),
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),
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const SizedBox(height: 12),
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Row(
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children: [
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const Text(
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'来源：',
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style: TextStyle(
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fontSize: 14,
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fontWeight: FontWeight.w500,
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),
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),
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Text(
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widget.exercise.source,
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style: const TextStyle(
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fontSize: 14,
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color: Colors.grey,
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),
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),
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],
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),
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const SizedBox(height: 8),
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Row(
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children: [
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const Text(
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'发布时间：',
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style: TextStyle(
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fontSize: 14,
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fontWeight: FontWeight.w500,
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),
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),
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Text(
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'${widget.exercise.publishDate.year}年${widget.exercise.publishDate.month}月${widget.exercise.publishDate.day}日',
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style: const TextStyle(
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fontSize: 14,
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color: Colors.grey,
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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 _buildQuestionsTab() {
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return SingleChildScrollView(
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padding: const EdgeInsets.all(16),
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child: Column(
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children: [
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if (showResults) _buildResultsHeader(),
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...widget.exercise.questions.asMap().entries.map((entry) {
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final index = entry.key;
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final question = entry.value;
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return Padding(
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padding: const EdgeInsets.only(bottom: 16),
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child: _buildQuestionCard(question, index),
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);
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}).toList(),
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const SizedBox(height: 20),
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if (!showResults)
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SizedBox(
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width: double.infinity,
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child: ElevatedButton(
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onPressed: _submitAnswers,
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style: ElevatedButton.styleFrom(
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backgroundColor: const Color(0xFF2196F3),
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padding: const EdgeInsets.symmetric(vertical: 16),
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shape: RoundedRectangleBorder(
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borderRadius: BorderRadius.circular(12),
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),
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),
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child: const Text(
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'提交答案',
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style: TextStyle(
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fontSize: 16,
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fontWeight: FontWeight.bold,
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color: Colors.white,
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),
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),
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),
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),
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if (showResults)
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SizedBox(
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width: double.infinity,
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child: ElevatedButton(
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onPressed: _resetQuiz,
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style: ElevatedButton.styleFrom(
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backgroundColor: Colors.grey,
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padding: const EdgeInsets.symmetric(vertical: 16),
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shape: RoundedRectangleBorder(
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borderRadius: BorderRadius.circular(12),
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),
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),
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child: const Text(
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'重新练习',
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style: TextStyle(
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fontSize: 16,
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fontWeight: FontWeight.bold,
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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 _buildResultsHeader() {
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final percentage = (score / widget.exercise.questions.length * 100).round();
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return Container(
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margin: const EdgeInsets.only(bottom: 20),
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padding: const EdgeInsets.all(20),
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decoration: BoxDecoration(
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color: Colors.white,
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borderRadius: BorderRadius.circular(16),
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boxShadow: [
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BoxShadow(
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color: Colors.black.withOpacity(0.05),
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blurRadius: 10,
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offset: const Offset(0, 2),
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),
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],
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),
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child: Column(
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children: [
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const Text(
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'练习结果',
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style: TextStyle(
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fontSize: 18,
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fontWeight: FontWeight.bold,
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),
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),
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const SizedBox(height: 16),
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Row(
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mainAxisAlignment: MainAxisAlignment.spaceAround,
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children: [
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Column(
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children: [
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Text(
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'$score',
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style: const TextStyle(
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fontSize: 24,
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fontWeight: FontWeight.bold,
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color: Color(0xFF2196F3),
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),
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),
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const Text(
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'正确题数',
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style: TextStyle(
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fontSize: 12,
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color: Colors.grey,
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),
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),
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],
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),
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Column(
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children: [
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Text(
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'${widget.exercise.questions.length}',
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style: const TextStyle(
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fontSize: 24,
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fontWeight: FontWeight.bold,
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color: Colors.grey,
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),
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),
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const Text(
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'总题数',
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style: TextStyle(
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fontSize: 12,
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color: Colors.grey,
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),
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),
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],
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),
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Column(
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children: [
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Text(
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'$percentage%',
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style: TextStyle(
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fontSize: 24,
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fontWeight: FontWeight.bold,
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color: percentage >= 80 ? Colors.green :
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percentage >= 60 ? Colors.orange : Colors.red,
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),
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),
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const Text(
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'正确率',
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style: TextStyle(
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fontSize: 12,
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color: Colors.grey,
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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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);
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}
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Widget _buildQuestionCard(ReadingQuestion question, int index) {
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final userAnswer = userAnswers[question.id];
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final isCorrect = userAnswer == question.correctAnswer;
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final showAnswer = showResults;
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return Container(
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padding: const EdgeInsets.all(20),
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decoration: BoxDecoration(
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color: Colors.white,
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borderRadius: BorderRadius.circular(16),
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border: showAnswer
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? Border.all(
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color: isCorrect ? Colors.green : Colors.red,
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width: 2,
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)
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: null,
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boxShadow: [
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BoxShadow(
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color: Colors.black.withOpacity(0.05),
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blurRadius: 10,
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offset: const Offset(0, 2),
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),
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],
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),
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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Row(
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children: [
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Container(
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width: 24,
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height: 24,
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decoration: BoxDecoration(
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color: const Color(0xFF2196F3),
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borderRadius: BorderRadius.circular(12),
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),
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child: Center(
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child: Text(
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'${index + 1}',
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style: const TextStyle(
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color: Colors.white,
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fontSize: 12,
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fontWeight: FontWeight.bold,
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),
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),
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),
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),
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const SizedBox(width: 12),
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Expanded(
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child: Text(
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question.question,
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style: const TextStyle(
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fontSize: 16,
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fontWeight: FontWeight.bold,
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),
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),
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),
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if (showAnswer)
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Icon(
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isCorrect ? Icons.check_circle : Icons.cancel,
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color: isCorrect ? Colors.green : Colors.red,
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),
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],
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),
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const SizedBox(height: 16),
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if (question.type == 'multiple_choice')
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...question.options.asMap().entries.map((entry) {
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final optionIndex = entry.key;
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final option = entry.value;
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final isSelected = userAnswer == optionIndex;
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final isCorrectOption = optionIndex == question.correctAnswer;
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Color? backgroundColor;
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Color? textColor;
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if (showAnswer) {
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if (isCorrectOption) {
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backgroundColor = Colors.green.withOpacity(0.1);
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textColor = Colors.green;
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} else if (isSelected && !isCorrectOption) {
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backgroundColor = Colors.red.withOpacity(0.1);
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textColor = Colors.red;
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}
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} else if (isSelected) {
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backgroundColor = const Color(0xFF2196F3).withOpacity(0.1);
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textColor = const Color(0xFF2196F3);
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}
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return GestureDetector(
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onTap: showAnswer ? null : () {
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setState(() {
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userAnswers[question.id] = optionIndex;
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});
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},
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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(
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color: backgroundColor ?? Colors.grey[50],
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borderRadius: BorderRadius.circular(8),
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border: Border.all(
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color: backgroundColor != null
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? (textColor ?? Colors.grey)
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: Colors.grey.withOpacity(0.3),
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),
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),
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child: Row(
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children: [
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Container(
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width: 20,
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height: 20,
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decoration: BoxDecoration(
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shape: BoxShape.circle,
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color: isSelected ? (textColor ?? const Color(0xFF2196F3)) : Colors.transparent,
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border: Border.all(
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color: textColor ?? Colors.grey,
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),
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),
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child: isSelected
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? const Icon(
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Icons.check,
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size: 12,
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color: Colors.white,
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)
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: null,
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),
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const SizedBox(width: 12),
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|
Expanded(
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child: Text(
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option,
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style: TextStyle(
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fontSize: 14,
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color: textColor ?? Colors.black87,
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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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}).toList(),
|
|
if (question.type == 'true_false')
|
|
Row(
|
|
children: [
|
|
Expanded(
|
|
child: _buildTrueFalseOption(question, true, 'True'),
|
|
),
|
|
const SizedBox(width: 12),
|
|
Expanded(
|
|
child: _buildTrueFalseOption(question, false, 'False'),
|
|
),
|
|
],
|
|
),
|
|
if (showAnswer && question.explanation.isNotEmpty) ...[
|
|
const SizedBox(height: 16),
|
|
Container(
|
|
padding: const EdgeInsets.all(12),
|
|
decoration: BoxDecoration(
|
|
color: Colors.blue.withOpacity(0.1),
|
|
borderRadius: BorderRadius.circular(8),
|
|
),
|
|
child: Column(
|
|
crossAxisAlignment: CrossAxisAlignment.start,
|
|
children: [
|
|
const Text(
|
|
'解析：',
|
|
style: TextStyle(
|
|
fontSize: 14,
|
|
fontWeight: FontWeight.bold,
|
|
color: Color(0xFF2196F3),
|
|
),
|
|
),
|
|
const SizedBox(height: 4),
|
|
Text(
|
|
question.explanation,
|
|
style: const TextStyle(
|
|
fontSize: 14,
|
|
color: Colors.black87,
|
|
),
|
|
),
|
|
],
|
|
),
|
|
),
|
|
],
|
|
],
|
|
),
|
|
);
|
|
}
|
|
|
|
Widget _buildTrueFalseOption(ReadingQuestion question, bool value, String label) {
|
|
final userAnswer = userAnswers[question.id];
|
|
final isSelected = userAnswer == (value ? 0 : 1);
|
|
final isCorrect = (value ? 0 : 1) == question.correctAnswer;
|
|
final showAnswer = showResults;
|
|
|
|
Color? backgroundColor;
|
|
Color? textColor;
|
|
if (showAnswer) {
|
|
if (isCorrect) {
|
|
backgroundColor = Colors.green.withOpacity(0.1);
|
|
textColor = Colors.green;
|
|
} else if (isSelected && !isCorrect) {
|
|
backgroundColor = Colors.red.withOpacity(0.1);
|
|
textColor = Colors.red;
|
|
}
|
|
} else if (isSelected) {
|
|
backgroundColor = const Color(0xFF2196F3).withOpacity(0.1);
|
|
textColor = const Color(0xFF2196F3);
|
|
}
|
|
|
|
return GestureDetector(
|
|
onTap: showAnswer ? null : () {
|
|
setState(() {
|
|
userAnswers[question.id] = value ? 0 : 1;
|
|
});
|
|
},
|
|
child: Container(
|
|
padding: const EdgeInsets.all(12),
|
|
decoration: BoxDecoration(
|
|
color: backgroundColor ?? Colors.grey[50],
|
|
borderRadius: BorderRadius.circular(8),
|
|
border: Border.all(
|
|
color: backgroundColor != null
|
|
? (textColor ?? Colors.grey)
|
|
: Colors.grey.withOpacity(0.3),
|
|
),
|
|
),
|
|
child: Center(
|
|
child: Text(
|
|
label,
|
|
style: TextStyle(
|
|
fontSize: 14,
|
|
fontWeight: FontWeight.bold,
|
|
color: textColor ?? Colors.black87,
|
|
),
|
|
),
|
|
),
|
|
),
|
|
);
|
|
}
|
|
|
|
void _submitAnswers() {
|
|
if (userAnswers.length < widget.exercise.questions.length) {
|
|
ScaffoldMessenger.of(context).showSnackBar(
|
|
const SnackBar(
|
|
content: Text('请完成所有题目后再提交'),
|
|
backgroundColor: Colors.orange,
|
|
),
|
|
);
|
|
return;
|
|
}
|
|
|
|
int correctCount = 0;
|
|
for (final question in widget.exercise.questions) {
|
|
if (userAnswers[question.id] == question.correctAnswer) {
|
|
correctCount++;
|
|
}
|
|
}
|
|
|
|
setState(() {
|
|
score = correctCount;
|
|
showResults = true;
|
|
});
|
|
|
|
ScaffoldMessenger.of(context).showSnackBar(
|
|
SnackBar(
|
|
content: Text('练习完成！正确率：${(correctCount / widget.exercise.questions.length * 100).round()}%'),
|
|
backgroundColor: Colors.green,
|
|
),
|
|
);
|
|
}
|
|
|
|
void _resetQuiz() {
|
|
setState(() {
|
|
userAnswers.clear();
|
|
showResults = false;
|
|
score = 0;
|
|
});
|
|
}
|
|
|
|
String _getDifficultyLabel(ReadingDifficulty difficulty) {
|
|
switch (difficulty) {
|
|
case ReadingDifficulty.elementary:
|
|
return 'A1';
|
|
case ReadingDifficulty.intermediate:
|
|
return 'B1';
|
|
case ReadingDifficulty.upperIntermediate:
|
|
return 'B2';
|
|
case ReadingDifficulty.advanced:
|
|
return 'C1';
|
|
case ReadingDifficulty.proficient:
|
|
return 'C2';
|
|
}
|
|
}
|
|
|
|
Color _getDifficultyColor(ReadingDifficulty difficulty) {
|
|
switch (difficulty) {
|
|
case ReadingDifficulty.elementary:
|
|
return Colors.green;
|
|
case ReadingDifficulty.intermediate:
|
|
return Colors.orange;
|
|
case ReadingDifficulty.upperIntermediate:
|
|
return Colors.deepOrange;
|
|
case ReadingDifficulty.advanced:
|
|
return Colors.red;
|
|
case ReadingDifficulty.proficient:
|
|
return Colors.purple;
|
|
}
|
|
}
|
|
} |