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client/lib/features/comprehensive_test/widgets/question_widgets.dart Normal file
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import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'dart:async';
import '../models/test_models.dart';
/// 题目展示组件
class QuestionWidget extends StatefulWidget {
final TestQuestion question;
final UserAnswer? userAnswer;
final Function(UserAnswer) onAnswerChanged;
const QuestionWidget({
super.key,
required this.question,
this.userAnswer,
required this.onAnswerChanged,
});
@override
State<QuestionWidget> createState() => _QuestionWidgetState();
}
class _QuestionWidgetState extends State<QuestionWidget> {
late List<String> _selectedAnswers;
late TextEditingController _textController;
Timer? _debounceTimer;
@override
void initState() {
super.initState();
_selectedAnswers = widget.userAnswer?.selectedAnswers ?? [];
_textController = TextEditingController(text: widget.userAnswer?.textAnswer ?? '');
}
@override
void dispose() {
_textController.dispose();
_debounceTimer?.cancel();
super.dispose();
}
void _updateAnswer() {
final answer = UserAnswer(
questionId: widget.question.id,
selectedAnswers: _selectedAnswers,
textAnswer: _textController.text.isNotEmpty ? _textController.text : null,
answeredAt: DateTime.now(),
timeSpent: 0, // 这里应该计算实际用时
);
widget.onAnswerChanged(answer);
}
void _onTextChanged(String text) {
_debounceTimer?.cancel();
_debounceTimer = Timer(const Duration(milliseconds: 500), () {
_updateAnswer();
});
}
@override
Widget build(BuildContext context) {
return Container(
padding: const EdgeInsets.all(20),
decoration: BoxDecoration(
color: Colors.white,
borderRadius: BorderRadius.circular(16),
boxShadow: [
BoxShadow(
color: Colors.grey.withOpacity(0.1),
blurRadius: 8,
offset: const Offset(0, 4),
),
],
),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
_buildQuestionContent(),
const SizedBox(height: 24),
_buildAnswerSection(),
if (widget.question.explanation != null && widget.userAnswer != null) ...[
const SizedBox(height: 16),
_buildExplanation(),
],
],
),
);
}
Widget _buildQuestionContent() {
return Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
widget.question.content,
style: const TextStyle(
fontSize: 18,
fontWeight: FontWeight.w600,
height: 1.4,
),
),
if (widget.question.imageUrl != null) ...[
const SizedBox(height: 16),
ClipRRect(
borderRadius: BorderRadius.circular(8),
child: Image.network(
widget.question.imageUrl!,
width: double.infinity,
height: 200,
fit: BoxFit.cover,
errorBuilder: (context, error, stackTrace) {
return Container(
width: double.infinity,
height: 200,
color: Colors.grey[200],
child: const Icon(
Icons.image_not_supported,
size: 48,
color: Colors.grey,
),
);
},
),
),
],
if (widget.question.audioUrl != null) ...[
const SizedBox(height: 16),
_buildAudioPlayer(),
],
],
);
}
Widget _buildAudioPlayer() {
return Container(
padding: const EdgeInsets.all(16),
decoration: BoxDecoration(
color: Colors.blue.withOpacity(0.1),
borderRadius: BorderRadius.circular(12),
border: Border.all(color: Colors.blue.withOpacity(0.3)),
),
child: Row(
children: [
Icon(
Icons.headphones,
color: Colors.blue[700],
size: 24,
),
const SizedBox(width: 12),
Expanded(
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
'音频材料',
style: TextStyle(
fontSize: 14,
fontWeight: FontWeight.w600,
color: Colors.blue[700],
),
),
Text(
'点击播放按钮收听音频',
style: TextStyle(
fontSize: 12,
color: Colors.blue[600],
),
),
],
),
),
IconButton(
onPressed: () {
// 这里应该实现音频播放功能
ScaffoldMessenger.of(context).showSnackBar(
const SnackBar(
content: Text('音频播放功能正在开发中...'),
backgroundColor: Colors.blue,
),
);
},
icon: Icon(
Icons.play_circle_filled,
color: Colors.blue[700],
size: 32,
),
),
],
),
);
}
Widget _buildAnswerSection() {
switch (widget.question.type) {
case QuestionType.multipleChoice:
return _buildMultipleChoice();
case QuestionType.multipleSelect:
return _buildMultipleSelect();
case QuestionType.fillInBlank:
return _buildFillInBlank();
case QuestionType.reading:
return _buildMultipleChoice(); // 阅读理解通常是选择题
case QuestionType.listening:
return _buildMultipleChoice(); // 听力理解通常是选择题
case QuestionType.speaking:
return _buildSpeaking();
case QuestionType.writing:
return _buildWriting();
}
}
Widget _buildMultipleChoice() {
return Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
const Text(
'请选择正确答案：',
style: TextStyle(
fontSize: 16,
fontWeight: FontWeight.w600,
),
),
const SizedBox(height: 12),
...widget.question.options.asMap().entries.map((entry) {
final index = entry.key;
final option = entry.value;
final optionLabel = String.fromCharCode(65 + index); // A, B, C, D
final isSelected = _selectedAnswers.contains(option);
return Container(
margin: const EdgeInsets.only(bottom: 8),
child: InkWell(
onTap: () {
setState(() {
_selectedAnswers = [option];
});
_updateAnswer();
},
borderRadius: BorderRadius.circular(12),
child: Container(
padding: const EdgeInsets.all(16),
decoration: BoxDecoration(
color: isSelected ? Colors.blue.withOpacity(0.1) : Colors.grey[50],
borderRadius: BorderRadius.circular(12),
border: Border.all(
color: isSelected ? Colors.blue : Colors.grey[300]!,
width: isSelected ? 2 : 1,
),
),
child: Row(
children: [
Container(
width: 24,
height: 24,
decoration: BoxDecoration(
shape: BoxShape.circle,
color: isSelected ? Colors.blue : Colors.transparent,
border: Border.all(
color: isSelected ? Colors.blue : Colors.grey[400]!,
width: 2,
),
),
child: isSelected
? const Icon(
Icons.check,
size: 16,
color: Colors.white,
)
: null,
),
const SizedBox(width: 12),
Text(
'$optionLabel.',
style: TextStyle(
fontSize: 16,
fontWeight: FontWeight.w600,
color: isSelected ? Colors.blue : Colors.grey[600],
),
),
const SizedBox(width: 8),
Expanded(
child: Text(
option,
style: TextStyle(
fontSize: 16,
color: isSelected ? Colors.blue[700] : Colors.black87,
),
),
),
],
),
),
),
);
}).toList(),
],
);
}
Widget _buildMultipleSelect() {
return Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
const Text(
'请选择所有正确答案：',
style: TextStyle(
fontSize: 16,
fontWeight: FontWeight.w600,
),
),
const SizedBox(height: 12),
...widget.question.options.asMap().entries.map((entry) {
final index = entry.key;
final option = entry.value;
final optionLabel = String.fromCharCode(65 + index); // A, B, C, D
final isSelected = _selectedAnswers.contains(option);
return Container(
margin: const EdgeInsets.only(bottom: 8),
child: InkWell(
onTap: () {
setState(() {
if (isSelected) {
_selectedAnswers.remove(option);
} else {
_selectedAnswers.add(option);
}
});
_updateAnswer();
},
borderRadius: BorderRadius.circular(12),
child: Container(
padding: const EdgeInsets.all(16),
decoration: BoxDecoration(
color: isSelected ? Colors.green.withOpacity(0.1) : Colors.grey[50],
borderRadius: BorderRadius.circular(12),
border: Border.all(
color: isSelected ? Colors.green : Colors.grey[300]!,
width: isSelected ? 2 : 1,
),
),
child: Row(
children: [
Container(
width: 24,
height: 24,
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(4),
color: isSelected ? Colors.green : Colors.transparent,
border: Border.all(
color: isSelected ? Colors.green : Colors.grey[400]!,
width: 2,
),
),
child: isSelected
? const Icon(
Icons.check,
size: 16,
color: Colors.white,
)
: null,
),
const SizedBox(width: 12),
Text(
'$optionLabel.',
style: TextStyle(
fontSize: 16,
fontWeight: FontWeight.w600,
color: isSelected ? Colors.green : Colors.grey[600],
),
),
const SizedBox(width: 8),
Expanded(
child: Text(
option,
style: TextStyle(
fontSize: 16,
color: isSelected ? Colors.green[700] : Colors.black87,
),
),
),
],
),
),
),
);
}).toList(),
],
);
}
Widget _buildFillInBlank() {
return Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
const Text(
'请填入正确答案：',
style: TextStyle(
fontSize: 16,
fontWeight: FontWeight.w600,
),
),
const SizedBox(height: 12),
TextField(
controller: _textController,
onChanged: _onTextChanged,
decoration: InputDecoration(
hintText: '请输入答案...',
border: OutlineInputBorder(
borderRadius: BorderRadius.circular(12),
borderSide: BorderSide(color: Colors.grey[300]!),
),
focusedBorder: OutlineInputBorder(
borderRadius: BorderRadius.circular(12),
borderSide: const BorderSide(color: Colors.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,
),
),
],
),
);
}
}