630 lines
19 KiB
Dart
630 lines
19 KiB
Dart
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import 'package:flutter/material.dart';
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import 'package:flutter/services.dart';
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import 'dart:async';
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import '../models/test_models.dart';
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/// 题目展示组件
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class QuestionWidget extends StatefulWidget {
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final TestQuestion question;
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final UserAnswer? userAnswer;
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final Function(UserAnswer) onAnswerChanged;
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const QuestionWidget({
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super.key,
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required this.question,
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this.userAnswer,
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required this.onAnswerChanged,
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});
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@override
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State<QuestionWidget> createState() => _QuestionWidgetState();
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}
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class _QuestionWidgetState extends State<QuestionWidget> {
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late List<String> _selectedAnswers;
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late TextEditingController _textController;
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Timer? _debounceTimer;
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@override
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void initState() {
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super.initState();
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_selectedAnswers = widget.userAnswer?.selectedAnswers ?? [];
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_textController = TextEditingController(text: widget.userAnswer?.textAnswer ?? '');
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}
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@override
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void dispose() {
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_textController.dispose();
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_debounceTimer?.cancel();
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super.dispose();
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}
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void _updateAnswer() {
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final answer = UserAnswer(
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questionId: widget.question.id,
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selectedAnswers: _selectedAnswers,
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textAnswer: _textController.text.isNotEmpty ? _textController.text : null,
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answeredAt: DateTime.now(),
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timeSpent: 0, // 这里应该计算实际用时
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);
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widget.onAnswerChanged(answer);
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}
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void _onTextChanged(String text) {
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_debounceTimer?.cancel();
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_debounceTimer = Timer(const Duration(milliseconds: 500), () {
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_updateAnswer();
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});
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}
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@override
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Widget build(BuildContext context) {
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return 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.grey.withOpacity(0.1),
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blurRadius: 8,
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offset: const Offset(0, 4),
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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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_buildQuestionContent(),
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const SizedBox(height: 24),
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_buildAnswerSection(),
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if (widget.question.explanation != null && widget.userAnswer != null) ...[
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const SizedBox(height: 16),
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_buildExplanation(),
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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 _buildQuestionContent() {
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return Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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Text(
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widget.question.content,
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style: const TextStyle(
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fontSize: 18,
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fontWeight: FontWeight.w600,
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height: 1.4,
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),
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),
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if (widget.question.imageUrl != null) ...[
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const SizedBox(height: 16),
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ClipRRect(
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borderRadius: BorderRadius.circular(8),
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child: Image.network(
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widget.question.imageUrl!,
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width: double.infinity,
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height: 200,
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fit: BoxFit.cover,
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errorBuilder: (context, error, stackTrace) {
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return Container(
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width: double.infinity,
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height: 200,
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color: Colors.grey[200],
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child: const Icon(
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Icons.image_not_supported,
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size: 48,
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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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if (widget.question.audioUrl != null) ...[
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const SizedBox(height: 16),
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_buildAudioPlayer(),
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],
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],
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);
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}
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Widget _buildAudioPlayer() {
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return Container(
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padding: const EdgeInsets.all(16),
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decoration: BoxDecoration(
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color: Colors.blue.withOpacity(0.1),
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borderRadius: BorderRadius.circular(12),
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border: Border.all(color: Colors.blue.withOpacity(0.3)),
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),
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child: Row(
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children: [
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Icon(
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Icons.headphones,
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color: Colors.blue[700],
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size: 24,
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),
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const SizedBox(width: 12),
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Expanded(
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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Text(
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'音频材料',
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style: TextStyle(
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fontSize: 14,
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fontWeight: FontWeight.w600,
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color: Colors.blue[700],
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),
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),
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Text(
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'点击播放按钮收听音频',
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style: TextStyle(
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fontSize: 12,
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color: Colors.blue[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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IconButton(
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onPressed: () {
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// 这里应该实现音频播放功能
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ScaffoldMessenger.of(context).showSnackBar(
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const SnackBar(
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content: Text('音频播放功能正在开发中...'),
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backgroundColor: Colors.blue,
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),
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);
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},
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icon: Icon(
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Icons.play_circle_filled,
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color: Colors.blue[700],
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size: 32,
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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 _buildAnswerSection() {
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switch (widget.question.type) {
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case QuestionType.multipleChoice:
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return _buildMultipleChoice();
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case QuestionType.multipleSelect:
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return _buildMultipleSelect();
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case QuestionType.fillInBlank:
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return _buildFillInBlank();
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case QuestionType.reading:
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return _buildMultipleChoice(); // 阅读理解通常是选择题
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case QuestionType.listening:
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return _buildMultipleChoice(); // 听力理解通常是选择题
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case QuestionType.speaking:
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return _buildSpeaking();
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case QuestionType.writing:
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return _buildWriting();
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}
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}
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Widget _buildMultipleChoice() {
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return Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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const Text(
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'请选择正确答案：',
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style: TextStyle(
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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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const SizedBox(height: 12),
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...widget.question.options.asMap().entries.map((entry) {
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final index = entry.key;
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final option = entry.value;
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final optionLabel = String.fromCharCode(65 + index); // A, B, C, D
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final isSelected = _selectedAnswers.contains(option);
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return Container(
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margin: const EdgeInsets.only(bottom: 8),
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child: InkWell(
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onTap: () {
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setState(() {
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_selectedAnswers = [option];
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});
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_updateAnswer();
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},
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borderRadius: BorderRadius.circular(12),
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child: Container(
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padding: const EdgeInsets.all(16),
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decoration: BoxDecoration(
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color: isSelected ? Colors.blue.withOpacity(0.1) : Colors.grey[50],
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borderRadius: BorderRadius.circular(12),
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border: Border.all(
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color: isSelected ? Colors.blue : Colors.grey[300]!,
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width: isSelected ? 2 : 1,
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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: 24,
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height: 24,
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decoration: BoxDecoration(
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shape: BoxShape.circle,
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color: isSelected ? Colors.blue : Colors.transparent,
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border: Border.all(
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color: isSelected ? Colors.blue : Colors.grey[400]!,
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width: 2,
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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: 16,
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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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Text(
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'$optionLabel.',
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style: TextStyle(
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fontSize: 16,
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fontWeight: FontWeight.w600,
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color: isSelected ? Colors.blue : Colors.grey[600],
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),
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),
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const SizedBox(width: 8),
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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: 16,
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color: isSelected ? Colors.blue[700] : 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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);
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}).toList(),
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],
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);
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}
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Widget _buildMultipleSelect() {
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return Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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const Text(
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'请选择所有正确答案：',
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style: TextStyle(
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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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const SizedBox(height: 12),
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...widget.question.options.asMap().entries.map((entry) {
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final index = entry.key;
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final option = entry.value;
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final optionLabel = String.fromCharCode(65 + index); // A, B, C, D
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final isSelected = _selectedAnswers.contains(option);
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return Container(
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margin: const EdgeInsets.only(bottom: 8),
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child: InkWell(
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onTap: () {
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setState(() {
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if (isSelected) {
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_selectedAnswers.remove(option);
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} else {
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_selectedAnswers.add(option);
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}
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});
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_updateAnswer();
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},
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borderRadius: BorderRadius.circular(12),
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child: Container(
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padding: const EdgeInsets.all(16),
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decoration: BoxDecoration(
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color: isSelected ? Colors.green.withOpacity(0.1) : Colors.grey[50],
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borderRadius: BorderRadius.circular(12),
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border: Border.all(
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color: isSelected ? Colors.green : Colors.grey[300]!,
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width: isSelected ? 2 : 1,
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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: 24,
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height: 24,
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decoration: BoxDecoration(
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borderRadius: BorderRadius.circular(4),
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color: isSelected ? Colors.green : Colors.transparent,
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border: Border.all(
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color: isSelected ? Colors.green : Colors.grey[400]!,
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width: 2,
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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: 16,
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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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Text(
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'$optionLabel.',
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style: TextStyle(
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fontSize: 16,
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fontWeight: FontWeight.w600,
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color: isSelected ? Colors.green : Colors.grey[600],
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),
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),
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const SizedBox(width: 8),
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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: 16,
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color: isSelected ? Colors.green[700] : 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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);
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}).toList(),
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],
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);
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}
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Widget _buildFillInBlank() {
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return Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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const Text(
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'请填入正确答案：',
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style: TextStyle(
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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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const SizedBox(height: 12),
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TextField(
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controller: _textController,
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onChanged: _onTextChanged,
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decoration: InputDecoration(
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hintText: '请输入答案...',
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border: OutlineInputBorder(
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borderRadius: BorderRadius.circular(12),
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borderSide: BorderSide(color: Colors.grey[300]!),
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),
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focusedBorder: OutlineInputBorder(
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||
|
|
borderRadius: BorderRadius.circular(12),
|
||
|
|
borderSide: const BorderSide(color: Colors.blue, width: 2),
|
||
|
|
),
|
||
|
|
contentPadding: const EdgeInsets.all(16),
|
||
|
|
),
|
||
|
|
style: const TextStyle(fontSize: 16),
|
||
|
|
),
|
||
|
|
if (widget.question.options.isNotEmpty) ...[
|
||
|
|
const SizedBox(height: 12),
|
||
|
|
const Text(
|
||
|
|
'提示选项：',
|
||
|
|
style: TextStyle(
|
||
|
|
fontSize: 14,
|
||
|
|
fontWeight: FontWeight.w600,
|
||
|
|
color: Colors.grey,
|
||
|
|
),
|
||
|
|
),
|
||
|
|
const SizedBox(height: 8),
|
||
|
|
Wrap(
|
||
|
|
spacing: 8,
|
||
|
|
runSpacing: 8,
|
||
|
|
children: widget.question.options.map((option) {
|
||
|
|
return InkWell(
|
||
|
|
onTap: () {
|
||
|
|
_textController.text = option;
|
||
|
|
_updateAnswer();
|
||
|
|
},
|
||
|
|
child: Container(
|
||
|
|
padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 6),
|
||
|
|
decoration: BoxDecoration(
|
||
|
|
color: Colors.grey[100],
|
||
|
|
borderRadius: BorderRadius.circular(16),
|
||
|
|
border: Border.all(color: Colors.grey[300]!),
|
||
|
|
),
|
||
|
|
child: Text(
|
||
|
|
option,
|
||
|
|
style: TextStyle(
|
||
|
|
fontSize: 14,
|
||
|
|
color: Colors.grey[700],
|
||
|
|
),
|
||
|
|
),
|
||
|
|
),
|
||
|
|
);
|
||
|
|
}).toList(),
|
||
|
|
),
|
||
|
|
],
|
||
|
|
],
|
||
|
|
);
|
||
|
|
}
|
||
|
|
|
||
|
|
Widget _buildSpeaking() {
|
||
|
|
return Column(
|
||
|
|
crossAxisAlignment: CrossAxisAlignment.start,
|
||
|
|
children: [
|
||
|
|
const Text(
|
||
|
|
'口语回答：',
|
||
|
|
style: TextStyle(
|
||
|
|
fontSize: 16,
|
||
|
|
fontWeight: FontWeight.w600,
|
||
|
|
),
|
||
|
|
),
|
||
|
|
const SizedBox(height: 12),
|
||
|
|
Container(
|
||
|
|
width: double.infinity,
|
||
|
|
padding: const EdgeInsets.all(20),
|
||
|
|
decoration: BoxDecoration(
|
||
|
|
color: Colors.red.withOpacity(0.1),
|
||
|
|
borderRadius: BorderRadius.circular(12),
|
||
|
|
border: Border.all(color: Colors.red.withOpacity(0.3)),
|
||
|
|
),
|
||
|
|
child: Column(
|
||
|
|
children: [
|
||
|
|
Icon(
|
||
|
|
Icons.mic,
|
||
|
|
size: 48,
|
||
|
|
color: Colors.red[600],
|
||
|
|
),
|
||
|
|
const SizedBox(height: 12),
|
||
|
|
Text(
|
||
|
|
'点击开始录音',
|
||
|
|
style: TextStyle(
|
||
|
|
fontSize: 16,
|
||
|
|
fontWeight: FontWeight.w600,
|
||
|
|
color: Colors.red[700],
|
||
|
|
),
|
||
|
|
),
|
||
|
|
const SizedBox(height: 8),
|
||
|
|
Text(
|
||
|
|
'建议录音时长：${widget.question.timeLimit}秒',
|
||
|
|
style: TextStyle(
|
||
|
|
fontSize: 14,
|
||
|
|
color: Colors.red[600],
|
||
|
|
),
|
||
|
|
),
|
||
|
|
const SizedBox(height: 16),
|
||
|
|
ElevatedButton.icon(
|
||
|
|
onPressed: () {
|
||
|
|
// 这里应该实现录音功能
|
||
|
|
ScaffoldMessenger.of(context).showSnackBar(
|
||
|
|
const SnackBar(
|
||
|
|
content: Text('录音功能正在开发中...'),
|
||
|
|
backgroundColor: Colors.red,
|
||
|
|
),
|
||
|
|
);
|
||
|
|
},
|
||
|
|
icon: const Icon(Icons.fiber_manual_record),
|
||
|
|
label: const Text('开始录音'),
|
||
|
|
style: ElevatedButton.styleFrom(
|
||
|
|
backgroundColor: Colors.red,
|
||
|
|
foregroundColor: Colors.white,
|
||
|
|
padding: const EdgeInsets.symmetric(horizontal: 24, vertical: 12),
|
||
|
|
),
|
||
|
|
),
|
||
|
|
],
|
||
|
|
),
|
||
|
|
),
|
||
|
|
],
|
||
|
|
);
|
||
|
|
}
|
||
|
|
|
||
|
|
Widget _buildWriting() {
|
||
|
|
return Column(
|
||
|
|
crossAxisAlignment: CrossAxisAlignment.start,
|
||
|
|
children: [
|
||
|
|
const Text(
|
||
|
|
'请写出您的答案：',
|
||
|
|
style: TextStyle(
|
||
|
|
fontSize: 16,
|
||
|
|
fontWeight: FontWeight.w600,
|
||
|
|
),
|
||
|
|
),
|
||
|
|
const SizedBox(height: 12),
|
||
|
|
TextField(
|
||
|
|
controller: _textController,
|
||
|
|
onChanged: _onTextChanged,
|
||
|
|
maxLines: 8,
|
||
|
|
decoration: InputDecoration(
|
||
|
|
hintText: '请在此输入您的答案...',
|
||
|
|
border: OutlineInputBorder(
|
||
|
|
borderRadius: BorderRadius.circular(12),
|
||
|
|
borderSide: BorderSide(color: Colors.grey[300]!),
|
||
|
|
),
|
||
|
|
focusedBorder: OutlineInputBorder(
|
||
|
|
borderRadius: BorderRadius.circular(12),
|
||
|
|
borderSide: const BorderSide(color: Colors.teal, width: 2),
|
||
|
|
),
|
||
|
|
contentPadding: const EdgeInsets.all(16),
|
||
|
|
),
|
||
|
|
style: const TextStyle(fontSize: 16, height: 1.5),
|
||
|
|
),
|
||
|
|
const SizedBox(height: 8),
|
||
|
|
Row(
|
||
|
|
mainAxisAlignment: MainAxisAlignment.spaceBetween,
|
||
|
|
children: [
|
||
|
|
Text(
|
||
|
|
'字数：${_textController.text.length}',
|
||
|
|
style: TextStyle(
|
||
|
|
fontSize: 12,
|
||
|
|
color: Colors.grey[600],
|
||
|
|
),
|
||
|
|
),
|
||
|
|
Text(
|
||
|
|
'建议时长：${widget.question.timeLimit ~/ 60}分钟',
|
||
|
|
style: TextStyle(
|
||
|
|
fontSize: 12,
|
||
|
|
color: Colors.grey[600],
|
||
|
|
),
|
||
|
|
),
|
||
|
|
],
|
||
|
|
),
|
||
|
|
],
|
||
|
|
);
|
||
|
|
}
|
||
|
|
|
||
|
|
Widget _buildExplanation() {
|
||
|
|
return Container(
|
||
|
|
padding: const EdgeInsets.all(16),
|
||
|
|
decoration: BoxDecoration(
|
||
|
|
color: Colors.blue.withOpacity(0.05),
|
||
|
|
borderRadius: BorderRadius.circular(12),
|
||
|
|
border: Border.all(color: Colors.blue.withOpacity(0.2)),
|
||
|
|
),
|
||
|
|
child: Column(
|
||
|
|
crossAxisAlignment: CrossAxisAlignment.start,
|
||
|
|
children: [
|
||
|
|
Row(
|
||
|
|
children: [
|
||
|
|
Icon(
|
||
|
|
Icons.lightbulb_outline,
|
||
|
|
color: Colors.blue[600],
|
||
|
|
size: 20,
|
||
|
|
),
|
||
|
|
const SizedBox(width: 8),
|
||
|
|
Text(
|
||
|
|
'解析',
|
||
|
|
style: TextStyle(
|
||
|
|
fontSize: 14,
|
||
|
|
fontWeight: FontWeight.w600,
|
||
|
|
color: Colors.blue[700],
|
||
|
|
),
|
||
|
|
),
|
||
|
|
],
|
||
|
|
),
|
||
|
|
const SizedBox(height: 8),
|
||
|
|
Text(
|
||
|
|
widget.question.explanation!,
|
||
|
|
style: TextStyle(
|
||
|
|
fontSize: 14,
|
||
|
|
color: Colors.blue[700],
|
||
|
|
height: 1.4,
|
||
|
|
),
|
||
|
|
),
|
||
|
|
],
|
||
|
|
),
|
||
|
|
);
|
||
|
|
}
|
||
|
|
}
|