437 lines
14 KiB
Dart
437 lines
14 KiB
Dart
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import 'package:flutter/material.dart';
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import 'package:provider/provider.dart';
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import 'dart:async';
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import '../models/writing_task.dart';
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import '../models/writing_submission.dart';
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import '../providers/writing_provider.dart';
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class WritingTaskScreen extends StatefulWidget {
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final WritingTask task;
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const WritingTaskScreen({
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super.key,
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required this.task,
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});
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@override
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State<WritingTaskScreen> createState() => _WritingTaskScreenState();
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}
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class _WritingTaskScreenState extends State<WritingTaskScreen> {
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final TextEditingController _contentController = TextEditingController();
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final ScrollController _scrollController = ScrollController();
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Timer? _timer;
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int _elapsedSeconds = 0;
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bool _isSubmitting = false;
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bool _showInstructions = true;
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int _wordCount = 0;
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@override
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void initState() {
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super.initState();
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_startTimer();
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_contentController.addListener(_updateWordCount);
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}
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@override
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void dispose() {
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_timer?.cancel();
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_contentController.dispose();
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_scrollController.dispose();
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super.dispose();
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}
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void _startTimer() {
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_timer = Timer.periodic(const Duration(seconds: 1), (timer) {
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setState(() {
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_elapsedSeconds++;
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});
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// 检查时间限制
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if (widget.task.timeLimit != null &&
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_elapsedSeconds >= widget.task.timeLimit! * 60) {
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_showTimeUpDialog();
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}
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});
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}
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void _updateWordCount() {
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final text = _contentController.text;
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final words = text.trim().split(RegExp(r'\s+'));
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setState(() {
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_wordCount = text.trim().isEmpty ? 0 : words.length;
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});
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}
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void _showTimeUpDialog() {
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showDialog(
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context: context,
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barrierDismissible: false,
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builder: (context) => AlertDialog(
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title: const Text('时间到！'),
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content: const Text('写作时间已结束，请提交您的作品。'),
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actions: [
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TextButton(
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onPressed: () {
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Navigator.of(context).pop();
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_submitWriting();
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},
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child: const Text('提交'),
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),
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],
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),
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);
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}
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Future<void> _submitWriting() async {
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if (_isSubmitting) return;
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final content = _contentController.text.trim();
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if (content.isEmpty) {
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ScaffoldMessenger.of(context).showSnackBar(
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const SnackBar(content: Text('请输入写作内容')),
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);
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return;
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}
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setState(() {
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_isSubmitting = true;
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});
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try {
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final provider = Provider.of<WritingProvider>(context, listen: false);
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// 首先开始任务（如果还没有开始）
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if (provider.currentSubmission == null) {
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await provider.startTask(widget.task.id);
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}
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// 更新内容
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provider.updateContent(content);
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provider.updateTimeSpent(_elapsedSeconds);
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// 提交写作
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final success = await provider.submitWriting();
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if (mounted && success) {
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Navigator.of(context).pop(true);
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ScaffoldMessenger.of(context).showSnackBar(
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const SnackBar(content: Text('写作已提交，正在批改中...')),
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);
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} else if (mounted && !success) {
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ScaffoldMessenger.of(context).showSnackBar(
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const SnackBar(content: Text('提交失败，请重试')),
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);
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}
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} catch (e) {
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if (mounted) {
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ScaffoldMessenger.of(context).showSnackBar(
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SnackBar(content: Text('提交失败: $e')),
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);
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}
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} finally {
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if (mounted) {
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setState(() {
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_isSubmitting = false;
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});
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}
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}
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}
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String _formatTime(int seconds) {
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final minutes = seconds ~/ 60;
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final remainingSeconds = seconds % 60;
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return '${minutes.toString().padLeft(2, '0')}:${remainingSeconds.toString().padLeft(2, '0')}';
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}
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@override
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Widget build(BuildContext context) {
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return Scaffold(
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appBar: AppBar(
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title: Text(widget.task.title),
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actions: [
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IconButton(
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icon: Icon(_showInstructions ? Icons.visibility_off : Icons.visibility),
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onPressed: () {
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setState(() {
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_showInstructions = !_showInstructions;
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});
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},
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),
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IconButton(
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icon: const Icon(Icons.help_outline),
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onPressed: _showHelpDialog,
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),
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],
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),
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body: Column(
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children: [
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// 状态栏
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Container(
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padding: const EdgeInsets.all(16),
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decoration: BoxDecoration(
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color: Colors.grey[100],
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border: Border(
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bottom: BorderSide(color: Colors.grey[300]!),
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),
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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.timer,
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size: 20,
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color: _getTimeColor(),
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),
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const SizedBox(width: 8),
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Text(
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_formatTime(_elapsedSeconds),
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style: TextStyle(
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fontSize: 16,
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fontWeight: FontWeight.bold,
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color: _getTimeColor(),
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),
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),
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if (widget.task.timeLimit != null)
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Text(
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' / ${widget.task.timeLimit}分钟',
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style: const TextStyle(fontSize: 14, color: Colors.grey),
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),
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const Spacer(),
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Icon(
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Icons.text_fields,
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size: 20,
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color: _getWordCountColor(_wordCount),
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),
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const SizedBox(width: 8),
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Text(
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'$_wordCount',
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style: TextStyle(
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fontSize: 16,
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fontWeight: FontWeight.bold,
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color: _getWordCountColor(_wordCount),
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),
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),
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if (widget.task.wordLimit != null)
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Text(
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' / ${widget.task.wordLimit}字',
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style: const TextStyle(fontSize: 14, color: Colors.grey),
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),
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],
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),
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),
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// 任务说明
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if (_showInstructions)
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Container(
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width: double.infinity,
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padding: const EdgeInsets.all(16),
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decoration: BoxDecoration(
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color: Colors.blue[50],
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border: Border(
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bottom: BorderSide(color: Colors.grey[300]!),
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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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Icon(
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Icons.assignment,
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color: Colors.blue[700],
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size: 20,
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),
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const SizedBox(width: 8),
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Text(
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'任务要求',
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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.blue[700],
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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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Text(
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widget.task.description,
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style: const TextStyle(fontSize: 14),
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),
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if (widget.task.requirements.isNotEmpty) ...[
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const SizedBox(height: 12),
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const Text(
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'具体要求:',
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style: TextStyle(
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fontSize: 14,
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fontWeight: FontWeight.w600,
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),
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),
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const SizedBox(height: 4),
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...widget.task.requirements.map((req) => Padding(
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padding: const EdgeInsets.only(left: 16, bottom: 2),
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child: Text(
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'• $req',
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style: const TextStyle(fontSize: 13),
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),
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)).toList(),
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],
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if (widget.task.keywords.isNotEmpty) ...[
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const SizedBox(height: 12),
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const Text(
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'关键词:',
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style: TextStyle(
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fontSize: 14,
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fontWeight: FontWeight.w600,
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),
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),
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const SizedBox(height: 4),
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Wrap(
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spacing: 8,
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children: widget.task.keywords.map((keyword) => Chip(
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label: Text(
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keyword,
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style: const TextStyle(fontSize: 12),
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),
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backgroundColor: Colors.blue[100],
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materialTapTargetSize: MaterialTapTargetSize.shrinkWrap,
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)).toList(),
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),
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],
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if (widget.task.prompt != null && widget.task.prompt!.isNotEmpty) ...[
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const SizedBox(height: 12),
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const Text(
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'提示:',
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style: TextStyle(
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fontSize: 14,
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fontWeight: FontWeight.w600,
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),
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),
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const SizedBox(height: 4),
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Padding(
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padding: const EdgeInsets.only(left: 16, bottom: 2),
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child: Text(
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'💡 ${widget.task.prompt}',
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style: const TextStyle(fontSize: 13),
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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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// 写作区域
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Expanded(
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child: Padding(
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padding: const EdgeInsets.all(16),
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child: TextField(
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controller: _contentController,
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maxLines: null,
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expands: true,
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decoration: const InputDecoration(
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hintText: '请在此处开始写作...',
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border: OutlineInputBorder(),
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contentPadding: EdgeInsets.all(16),
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),
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style: const TextStyle(fontSize: 16, height: 1.5),
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),
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),
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),
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],
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),
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bottomNavigationBar: Container(
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padding: const EdgeInsets.all(16),
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decoration: BoxDecoration(
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color: Colors.white,
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boxShadow: [
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BoxShadow(
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color: Colors.grey.withOpacity(0.2),
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spreadRadius: 1,
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blurRadius: 3,
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offset: const Offset(0, -1),
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),
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],
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),
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child: Row(
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children: [
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Expanded(
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child: OutlinedButton(
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onPressed: () => Navigator.of(context).pop(),
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child: const Text('保存草稿'),
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),
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),
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const SizedBox(width: 16),
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Expanded(
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child: ElevatedButton(
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onPressed: _isSubmitting ? null : _submitWriting,
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child: _isSubmitting
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? const SizedBox(
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width: 20,
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height: 20,
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child: CircularProgressIndicator(strokeWidth: 2),
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)
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: const Text('提交'),
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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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Color _getTimeColor() {
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if (widget.task.timeLimit == null) return Colors.blue;
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final remainingMinutes = (widget.task.timeLimit! * 60 - _elapsedSeconds) / 60;
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if (remainingMinutes <= 5) return Colors.red;
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if (remainingMinutes <= 10) return Colors.orange;
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return Colors.blue;
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}
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Color _getWordCountColor(int wordCount) {
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if (widget.task.wordLimit == null) return Colors.green;
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final ratio = wordCount / widget.task.wordLimit!;
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if (ratio > 1.1) return Colors.red;
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if (ratio > 0.9) return Colors.green;
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if (ratio > 0.5) return Colors.orange;
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return Colors.grey;
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}
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void _showHelpDialog() {
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showDialog(
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context: context,
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builder: (context) => AlertDialog(
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title: const Text('写作帮助'),
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content: const SingleChildScrollView(
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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mainAxisSize: MainAxisSize.min,
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children: [
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Text(
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'写作技巧:',
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style: TextStyle(fontWeight: FontWeight.bold),
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),
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SizedBox(height: 8),
|
||
|
|
Text('• 仔细阅读任务要求，确保理解题意'),
|
||
|
|
Text('• 合理安排时间，留出检查和修改的时间'),
|
||
|
|
Text('• 注意文章结构，包括开头、主体和结尾'),
|
||
|
|
Text('• 使用多样化的词汇和句式'),
|
||
|
|
Text('• 检查语法、拼写和标点符号'),
|
||
|
|
SizedBox(height: 12),
|
||
|
|
Text(
|
||
|
|
'评分标准:',
|
||
|
|
style: TextStyle(fontWeight: FontWeight.bold),
|
||
|
|
),
|
||
|
|
SizedBox(height: 8),
|
||
|
|
Text('• 内容相关性和完整性'),
|
||
|
|
Text('• 语言准确性和流畅性'),
|
||
|
|
Text('• 词汇丰富度和语法复杂性'),
|
||
|
|
Text('• 文章结构和逻辑性'),
|
||
|
|
],
|
||
|
|
),
|
||
|
|
),
|
||
|
|
actions: [
|
||
|
|
TextButton(
|
||
|
|
onPressed: () => Navigator.of(context).pop(),
|
||
|
|
child: const Text('知道了'),
|
||
|
|
),
|
||
|
|
],
|
||
|
|
),
|
||
|
|
);
|
||
|
|
}
|
||
|
|
}
|