388 lines
13 KiB
Dart
388 lines
13 KiB
Dart
|
import 'package:flutter/material.dart';
|
||
|
|
import 'package:flutter_riverpod/flutter_riverpod.dart';
|
||
|
|
import '../models/writing_task.dart';
|
||
|
|
import '../providers/writing_provider.dart';
|
||
|
|
import 'writing_detail_screen.dart';
|
||
|
|
|
||
|
|
/// 考试写作页面
|
||
|
|
class ExamWritingScreen extends ConsumerStatefulWidget {
|
||
|
|
final ExamType? examType;
|
||
|
|
final String title;
|
||
|
|
|
||
|
|
const ExamWritingScreen({
|
||
|
|
super.key,
|
||
|
|
this.examType,
|
||
|
|
required this.title,
|
||
|
|
});
|
||
|
|
|
||
|
|
@override
|
||
|
|
ConsumerState<ExamWritingScreen> createState() => _ExamWritingScreenState();
|
||
|
|
}
|
||
|
|
|
||
|
|
class _ExamWritingScreenState extends ConsumerState<ExamWritingScreen> {
|
||
|
|
ExamType? selectedExamType;
|
||
|
|
|
||
|
|
@override
|
||
|
|
void initState() {
|
||
|
|
super.initState();
|
||
|
|
selectedExamType = widget.examType;
|
||
|
|
}
|
||
|
|
|
||
|
|
@override
|
||
|
|
Widget build(BuildContext context) {
|
||
|
|
return Scaffold(
|
||
|
|
backgroundColor: const Color(0xFFF5F5F5),
|
||
|
|
appBar: AppBar(
|
||
|
|
title: Text(widget.title),
|
||
|
|
backgroundColor: Colors.white,
|
||
|
|
foregroundColor: Colors.black,
|
||
|
|
elevation: 0,
|
||
|
|
),
|
||
|
|
body: Column(
|
||
|
|
children: [
|
||
|
|
if (widget.examType == null) _buildExamTypeFilter(),
|
||
|
|
Expanded(
|
||
|
|
child: Builder(
|
||
|
|
builder: (context) {
|
||
|
|
if (selectedExamType != null) {
|
||
|
|
final tasksAsync = ref.watch(examWritingTasksProvider(selectedExamType!));
|
||
|
|
return tasksAsync.when(
|
||
|
|
data: (tasks) {
|
||
|
|
if (tasks.isEmpty) return _buildEmptyState();
|
||
|
|
return ListView.builder(
|
||
|
|
padding: const EdgeInsets.all(16),
|
||
|
|
itemCount: tasks.length,
|
||
|
|
itemBuilder: (context, index) {
|
||
|
|
final task = tasks[index];
|
||
|
|
return _buildTaskCard(task);
|
||
|
|
},
|
||
|
|
);
|
||
|
|
},
|
||
|
|
loading: () => const Center(child: CircularProgressIndicator()),
|
||
|
|
error: (e, st) => Center(
|
||
|
|
child: Column(
|
||
|
|
mainAxisAlignment: MainAxisAlignment.center,
|
||
|
|
children: [
|
||
|
|
Icon(Icons.error_outline, size: 48, color: Colors.grey[400]),
|
||
|
|
const SizedBox(height: 12),
|
||
|
|
Text('加载失败', style: TextStyle(fontSize: 14, color: Colors.grey[600])),
|
||
|
|
const SizedBox(height: 8),
|
||
|
|
TextButton(
|
||
|
|
onPressed: () {
|
||
|
|
ref.invalidate(examWritingTasksProvider(selectedExamType!));
|
||
|
|
},
|
||
|
|
child: const Text('重试'),
|
||
|
|
),
|
||
|
|
],
|
||
|
|
),
|
||
|
|
),
|
||
|
|
);
|
||
|
|
} else {
|
||
|
|
final service = ref.watch(writingServiceProvider);
|
||
|
|
return FutureBuilder<List<WritingTask>>(
|
||
|
|
future: service.getWritingTasks(limit: 100),
|
||
|
|
builder: (context, snapshot) {
|
||
|
|
if (snapshot.connectionState == ConnectionState.waiting) {
|
||
|
|
return const Center(child: CircularProgressIndicator());
|
||
|
|
}
|
||
|
|
if (snapshot.hasError) {
|
||
|
|
return Center(
|
||
|
|
child: Column(
|
||
|
|
mainAxisAlignment: MainAxisAlignment.center,
|
||
|
|
children: [
|
||
|
|
Icon(Icons.error_outline, size: 48, color: Colors.grey[400]),
|
||
|
|
const SizedBox(height: 12),
|
||
|
|
Text('加载失败', style: TextStyle(fontSize: 14, color: Colors.grey[600])),
|
||
|
|
const SizedBox(height: 8),
|
||
|
|
TextButton(
|
||
|
|
onPressed: () {
|
||
|
|
setState(() {});
|
||
|
|
},
|
||
|
|
child: const Text('重试'),
|
||
|
|
),
|
||
|
|
],
|
||
|
|
),
|
||
|
|
);
|
||
|
|
}
|
||
|
|
final allTasks = snapshot.data ?? [];
|
||
|
|
final examTasks = allTasks.where((t) => t.examType != null).toList();
|
||
|
|
if (examTasks.isEmpty) return _buildEmptyState();
|
||
|
|
return ListView.builder(
|
||
|
|
padding: const EdgeInsets.all(16),
|
||
|
|
itemCount: examTasks.length,
|
||
|
|
itemBuilder: (context, index) {
|
||
|
|
final task = examTasks[index];
|
||
|
|
return _buildTaskCard(task);
|
||
|
|
},
|
||
|
|
);
|
||
|
|
},
|
||
|
|
);
|
||
|
|
}
|
||
|
|
},
|
||
|
|
),
|
||
|
|
),
|
||
|
|
],
|
||
|
|
),
|
||
|
|
);
|
||
|
|
}
|
||
|
|
|
||
|
|
Widget _buildExamTypeFilter() {
|
||
|
|
return Container(
|
||
|
|
padding: const EdgeInsets.all(16),
|
||
|
|
color: Colors.white,
|
||
|
|
child: Column(
|
||
|
|
crossAxisAlignment: CrossAxisAlignment.start,
|
||
|
|
children: [
|
||
|
|
const Text(
|
||
|
|
'选择考试类型',
|
||
|
|
style: TextStyle(
|
||
|
|
fontSize: 16,
|
||
|
|
fontWeight: FontWeight.bold,
|
||
|
|
),
|
||
|
|
),
|
||
|
|
const SizedBox(height: 12),
|
||
|
|
SingleChildScrollView(
|
||
|
|
scrollDirection: Axis.horizontal,
|
||
|
|
child: Row(
|
||
|
|
children: [
|
||
|
|
_buildFilterChip('全部', null),
|
||
|
|
const SizedBox(width: 8),
|
||
|
|
...ExamType.values.map((type) => Padding(
|
||
|
|
padding: const EdgeInsets.only(right: 8),
|
||
|
|
child: _buildFilterChip(type.displayName, type),
|
||
|
|
)),
|
||
|
|
],
|
||
|
|
),
|
||
|
|
),
|
||
|
|
],
|
||
|
|
),
|
||
|
|
);
|
||
|
|
}
|
||
|
|
|
||
|
|
Widget _buildFilterChip(String label, ExamType? type) {
|
||
|
|
final isSelected = selectedExamType == type;
|
||
|
|
return FilterChip(
|
||
|
|
label: Text(label),
|
||
|
|
selected: isSelected,
|
||
|
|
onSelected: (selected) {
|
||
|
|
setState(() {
|
||
|
|
selectedExamType = type;
|
||
|
|
});
|
||
|
|
},
|
||
|
|
backgroundColor: Colors.grey[100],
|
||
|
|
selectedColor: const Color(0xFF2196F3).withOpacity(0.2),
|
||
|
|
checkmarkColor: const Color(0xFF2196F3),
|
||
|
|
labelStyle: TextStyle(
|
||
|
|
color: isSelected ? const Color(0xFF2196F3) : Colors.grey[700],
|
||
|
|
fontWeight: isSelected ? FontWeight.bold : FontWeight.normal,
|
||
|
|
),
|
||
|
|
);
|
||
|
|
}
|
||
|
|
|
||
|
|
Widget _buildEmptyState() {
|
||
|
|
return Center(
|
||
|
|
child: Column(
|
||
|
|
mainAxisAlignment: MainAxisAlignment.center,
|
||
|
|
children: [
|
||
|
|
Icon(
|
||
|
|
Icons.school_outlined,
|
||
|
|
size: 80,
|
||
|
|
color: Colors.grey[400],
|
||
|
|
),
|
||
|
|
const SizedBox(height: 16),
|
||
|
|
Text(
|
||
|
|
'暂无考试写作题目',
|
||
|
|
style: TextStyle(
|
||
|
|
fontSize: 18,
|
||
|
|
color: Colors.grey[600],
|
||
|
|
fontWeight: FontWeight.w500,
|
||
|
|
),
|
||
|
|
),
|
||
|
|
const SizedBox(height: 8),
|
||
|
|
Text(
|
||
|
|
'请选择其他考试类型或稍后再试',
|
||
|
|
style: TextStyle(
|
||
|
|
fontSize: 14,
|
||
|
|
color: Colors.grey[500],
|
||
|
|
),
|
||
|
|
),
|
||
|
|
],
|
||
|
|
),
|
||
|
|
);
|
||
|
|
}
|
||
|
|
|
||
|
|
Widget _buildTaskCard(WritingTask task) {
|
||
|
|
return Container(
|
||
|
|
margin: const EdgeInsets.only(bottom: 16),
|
||
|
|
decoration: BoxDecoration(
|
||
|
|
color: Colors.white,
|
||
|
|
borderRadius: BorderRadius.circular(16),
|
||
|
|
boxShadow: [
|
||
|
|
BoxShadow(
|
||
|
|
color: Colors.black.withOpacity(0.05),
|
||
|
|
blurRadius: 10,
|
||
|
|
offset: const Offset(0, 2),
|
||
|
|
),
|
||
|
|
],
|
||
|
|
),
|
||
|
|
child: InkWell(
|
||
|
|
onTap: () {
|
||
|
|
Navigator.push(
|
||
|
|
context,
|
||
|
|
MaterialPageRoute(
|
||
|
|
builder: (context) => WritingDetailScreen(task: task),
|
||
|
|
),
|
||
|
|
);
|
||
|
|
},
|
||
|
|
borderRadius: BorderRadius.circular(16),
|
||
|
|
child: Padding(
|
||
|
|
padding: const EdgeInsets.all(20),
|
||
|
|
child: Column(
|
||
|
|
crossAxisAlignment: CrossAxisAlignment.start,
|
||
|
|
children: [
|
||
|
|
Row(
|
||
|
|
children: [
|
||
|
|
Expanded(
|
||
|
|
child: Text(
|
||
|
|
task.title,
|
||
|
|
style: const TextStyle(
|
||
|
|
fontSize: 18,
|
||
|
|
fontWeight: FontWeight.bold,
|
||
|
|
),
|
||
|
|
),
|
||
|
|
),
|
||
|
|
Container(
|
||
|
|
padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 4),
|
||
|
|
decoration: BoxDecoration(
|
||
|
|
color: _getExamTypeColor(task.examType!),
|
||
|
|
borderRadius: BorderRadius.circular(12),
|
||
|
|
),
|
||
|
|
child: Text(
|
||
|
|
task.examType!.displayName,
|
||
|
|
style: const TextStyle(
|
||
|
|
fontSize: 12,
|
||
|
|
color: Colors.white,
|
||
|
|
fontWeight: FontWeight.bold,
|
||
|
|
),
|
||
|
|
),
|
||
|
|
),
|
||
|
|
],
|
||
|
|
),
|
||
|
|
const SizedBox(height: 8),
|
||
|
|
Text(
|
||
|
|
task.description,
|
||
|
|
style: const TextStyle(
|
||
|
|
fontSize: 14,
|
||
|
|
color: Colors.grey,
|
||
|
|
height: 1.4,
|
||
|
|
),
|
||
|
|
maxLines: 2,
|
||
|
|
overflow: TextOverflow.ellipsis,
|
||
|
|
),
|
||
|
|
const SizedBox(height: 12),
|
||
|
|
Row(
|
||
|
|
children: [
|
||
|
|
_buildInfoChip(
|
||
|
|
Icons.access_time,
|
||
|
|
'${task.timeLimit}分钟',
|
||
|
|
const Color(0xFF4CAF50),
|
||
|
|
),
|
||
|
|
const SizedBox(width: 12),
|
||
|
|
_buildInfoChip(
|
||
|
|
Icons.text_fields,
|
||
|
|
'${task.wordLimit}词',
|
||
|
|
const Color(0xFFFF9800),
|
||
|
|
),
|
||
|
|
const SizedBox(width: 12),
|
||
|
|
_buildInfoChip(
|
||
|
|
Icons.star,
|
||
|
|
'${task.difficulty.level}级',
|
||
|
|
_getDifficultyColor(task.difficulty),
|
||
|
|
),
|
||
|
|
],
|
||
|
|
),
|
||
|
|
if (task.keywords.isNotEmpty) ...[
|
||
|
|
const SizedBox(height: 12),
|
||
|
|
Wrap(
|
||
|
|
spacing: 6,
|
||
|
|
runSpacing: 6,
|
||
|
|
children: task.keywords.take(3).map((keyword) => Container(
|
||
|
|
padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 4),
|
||
|
|
decoration: BoxDecoration(
|
||
|
|
color: Colors.grey[100],
|
||
|
|
borderRadius: BorderRadius.circular(8),
|
||
|
|
),
|
||
|
|
child: Text(
|
||
|
|
keyword,
|
||
|
|
style: const TextStyle(
|
||
|
|
fontSize: 12,
|
||
|
|
color: Colors.grey,
|
||
|
|
),
|
||
|
|
),
|
||
|
|
)).toList(),
|
||
|
|
),
|
||
|
|
],
|
||
|
|
],
|
||
|
|
),
|
||
|
|
),
|
||
|
|
),
|
||
|
|
);
|
||
|
|
}
|
||
|
|
|
||
|
|
Widget _buildInfoChip(IconData icon, String text, Color color) {
|
||
|
|
return Container(
|
||
|
|
padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 4),
|
||
|
|
decoration: BoxDecoration(
|
||
|
|
color: color.withOpacity(0.1),
|
||
|
|
borderRadius: BorderRadius.circular(8),
|
||
|
|
),
|
||
|
|
child: Row(
|
||
|
|
mainAxisSize: MainAxisSize.min,
|
||
|
|
children: [
|
||
|
|
Icon(
|
||
|
|
icon,
|
||
|
|
size: 14,
|
||
|
|
color: color,
|
||
|
|
),
|
||
|
|
const SizedBox(width: 4),
|
||
|
|
Text(
|
||
|
|
text,
|
||
|
|
style: TextStyle(
|
||
|
|
fontSize: 12,
|
||
|
|
color: color,
|
||
|
|
fontWeight: FontWeight.w500,
|
||
|
|
),
|
||
|
|
),
|
||
|
|
],
|
||
|
|
),
|
||
|
|
);
|
||
|
|
}
|
||
|
|
|
||
|
|
Color _getDifficultyColor(WritingDifficulty difficulty) {
|
||
|
|
switch (difficulty) {
|
||
|
|
case WritingDifficulty.beginner:
|
||
|
|
return const Color(0xFF4CAF50);
|
||
|
|
case WritingDifficulty.elementary:
|
||
|
|
return const Color(0xFF8BC34A);
|
||
|
|
case WritingDifficulty.intermediate:
|
||
|
|
return const Color(0xFFFF9800);
|
||
|
|
case WritingDifficulty.upperIntermediate:
|
||
|
|
return const Color(0xFFFF5722);
|
||
|
|
case WritingDifficulty.advanced:
|
||
|
|
return const Color(0xFFF44336);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
Color _getExamTypeColor(ExamType examType) {
|
||
|
|
switch (examType) {
|
||
|
|
case ExamType.cet:
|
||
|
|
return const Color(0xFF2196F3);
|
||
|
|
case ExamType.kaoyan:
|
||
|
|
return const Color(0xFFF44336);
|
||
|
|
case ExamType.toefl:
|
||
|
|
return const Color(0xFF4CAF50);
|
||
|
|
case ExamType.ielts:
|
||
|
|
return const Color(0xFF9C27B0);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|