537 lines
16 KiB
Dart
537 lines
16 KiB
Dart
import 'package:flutter/material.dart';
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import 'package:provider/provider.dart';
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import '../models/speaking_scenario.dart';
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import '../models/conversation.dart';
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import '../providers/speaking_provider.dart';
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class SpeakingConversationScreen extends StatefulWidget {
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final SpeakingTask task;
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const SpeakingConversationScreen({
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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<SpeakingConversationScreen> createState() => _SpeakingConversationScreenState();
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}
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class _SpeakingConversationScreenState extends State<SpeakingConversationScreen> {
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final ScrollController _scrollController = ScrollController();
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final TextEditingController _textController = TextEditingController();
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bool _isTextMode = false;
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@override
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void initState() {
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super.initState();
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WidgetsBinding.instance.addPostFrameCallback((_) {
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context.read<SpeakingProvider>().startConversation(widget.task.id);
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});
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}
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@override
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void dispose() {
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_scrollController.dispose();
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_textController.dispose();
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super.dispose();
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}
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void _scrollToBottom() {
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WidgetsBinding.instance.addPostFrameCallback((_) {
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if (_scrollController.hasClients) {
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_scrollController.animateTo(
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_scrollController.position.maxScrollExtent,
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duration: const Duration(milliseconds: 300),
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curve: Curves.easeOut,
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);
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}
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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 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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Consumer<SpeakingProvider>(
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builder: (context, provider, child) {
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return IconButton(
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icon: Icon(
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provider.currentConversation?.status == ConversationStatus.active
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? Icons.pause
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: Icons.stop,
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),
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onPressed: () {
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if (provider.currentConversation?.status == ConversationStatus.active) {
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provider.pauseConversation();
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} else {
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_showEndConversationDialog();
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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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body: Consumer<SpeakingProvider>(
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builder: (context, provider, child) {
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final conversation = provider.currentConversation;
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if (conversation == null) {
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return const Center(
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child: CircularProgressIndicator(),
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);
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}
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return Column(
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children: [
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// 任务信息卡片
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_buildTaskInfoCard(),
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// 对话状态指示器
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_buildStatusIndicator(conversation.status),
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// 消息列表
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Expanded(
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child: _buildMessageList(conversation.messages),
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),
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// 输入区域
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_buildInputArea(provider),
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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 _buildTaskInfoCard() {
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return Container(
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margin: const EdgeInsets.all(16),
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padding: const EdgeInsets.all(16),
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decoration: BoxDecoration(
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color: Theme.of(context).primaryColor.withOpacity(0.1),
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borderRadius: BorderRadius.circular(12),
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border: Border.all(
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color: Theme.of(context).primaryColor.withOpacity(0.3),
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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.chat,
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color: Theme.of(context).primaryColor,
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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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widget.task.scenario.displayName,
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style: TextStyle(
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color: Theme.of(context).primaryColor,
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fontWeight: FontWeight.bold,
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),
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),
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const Spacer(),
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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: Colors.blue.withOpacity(0.2),
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borderRadius: BorderRadius.circular(12),
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),
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child: Text(
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widget.task.difficulty.displayName,
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style: TextStyle(
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color: Colors.blue,
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fontSize: 12,
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fontWeight: FontWeight.w500,
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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: 8),
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Text(
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widget.task.description,
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style: TextStyle(
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color: Colors.grey[700],
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fontSize: 14,
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),
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),
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if (widget.task.objectives.isNotEmpty) ...[
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const SizedBox(height: 8),
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Text(
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'目标: ${widget.task.objectives.join('、')}',
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style: TextStyle(
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color: Colors.grey[600],
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fontSize: 12,
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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 _buildStatusIndicator(ConversationStatus status) {
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Color statusColor;
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String statusText;
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IconData statusIcon;
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switch (status) {
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case ConversationStatus.active:
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statusColor = Colors.green;
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statusText = '对话进行中';
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statusIcon = Icons.mic;
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break;
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case ConversationStatus.paused:
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statusColor = Colors.orange;
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statusText = '对话已暂停';
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statusIcon = Icons.pause;
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break;
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case ConversationStatus.completed:
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statusColor = Colors.blue;
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statusText = '对话已完成';
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statusIcon = Icons.check_circle;
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break;
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case ConversationStatus.cancelled:
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statusColor = Colors.red;
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statusText = '对话已取消';
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statusIcon = Icons.cancel;
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break;
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}
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return Container(
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padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
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color: statusColor.withOpacity(0.1),
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child: Row(
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children: [
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Icon(
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statusIcon,
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color: statusColor,
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size: 16,
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),
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const SizedBox(width: 8),
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Text(
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statusText,
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style: TextStyle(
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color: statusColor,
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fontSize: 12,
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fontWeight: FontWeight.w500,
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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 _buildMessageList(List<ConversationMessage> messages) {
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WidgetsBinding.instance.addPostFrameCallback((_) => _scrollToBottom());
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return ListView.builder(
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controller: _scrollController,
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padding: const EdgeInsets.symmetric(horizontal: 16),
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itemCount: messages.length,
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itemBuilder: (context, index) {
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final message = messages[index];
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return _buildMessageBubble(message);
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},
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);
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}
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Widget _buildMessageBubble(ConversationMessage message) {
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final isUser = message.type == MessageType.user;
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return Container(
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margin: const EdgeInsets.symmetric(vertical: 4),
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child: Row(
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mainAxisAlignment: isUser ? MainAxisAlignment.end : MainAxisAlignment.start,
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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if (!isUser) ...[
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CircleAvatar(
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radius: 16,
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backgroundColor: Theme.of(context).primaryColor,
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child: const Icon(
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Icons.smart_toy,
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color: Colors.white,
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size: 16,
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),
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),
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const SizedBox(width: 8),
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],
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Flexible(
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child: Container(
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padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 12),
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decoration: BoxDecoration(
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color: isUser
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? Theme.of(context).primaryColor
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: Colors.grey[200],
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borderRadius: BorderRadius.circular(18).copyWith(
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bottomLeft: isUser ? const Radius.circular(18) : const Radius.circular(4),
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bottomRight: isUser ? const Radius.circular(4) : const Radius.circular(18),
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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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Text(
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message.content,
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style: TextStyle(
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color: isUser ? Colors.white : Colors.black87,
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fontSize: 16,
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),
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),
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const SizedBox(height: 4),
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Row(
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mainAxisSize: MainAxisSize.min,
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children: [
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if (message.audioUrl != null)
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Icon(
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Icons.volume_up,
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size: 12,
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color: isUser ? Colors.white70 : Colors.grey[600],
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),
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if (message.audioUrl != null) const SizedBox(width: 4),
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Text(
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_formatTime(message.timestamp),
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style: TextStyle(
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color: isUser ? Colors.white70 : Colors.grey[600],
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fontSize: 10,
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),
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),
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if (message.confidence != null && isUser) ...[
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const SizedBox(width: 8),
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Icon(
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Icons.mic,
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size: 12,
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color: _getConfidenceColor(message.confidence!),
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),
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const SizedBox(width: 2),
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Text(
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'${(message.confidence! * 100).toInt()}%',
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style: TextStyle(
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color: _getConfidenceColor(message.confidence!),
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fontSize: 10,
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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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if (isUser) ...[
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const SizedBox(width: 8),
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CircleAvatar(
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radius: 16,
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backgroundColor: Colors.grey[300],
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child: Icon(
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Icons.person,
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color: Colors.grey[600],
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size: 16,
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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 _buildInputArea(SpeakingProvider provider) {
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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: Theme.of(context).cardColor,
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border: Border(
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top: BorderSide(
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color: Colors.grey.withOpacity(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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// 模式切换
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Row(
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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SegmentedButton<bool>(
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segments: const [
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ButtonSegment(
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value: false,
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label: Text('语音'),
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icon: Icon(Icons.mic),
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),
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ButtonSegment(
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value: true,
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label: Text('文字'),
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icon: Icon(Icons.keyboard),
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),
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],
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selected: {_isTextMode},
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onSelectionChanged: (Set<bool> selection) {
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setState(() {
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_isTextMode = selection.first;
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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: 16),
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// 输入控件
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if (_isTextMode)
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_buildTextInput(provider)
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else
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_buildVoiceInput(provider),
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],
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),
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);
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}
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Widget _buildTextInput(SpeakingProvider provider) {
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return Row(
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children: [
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Expanded(
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child: TextField(
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controller: _textController,
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decoration: InputDecoration(
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hintText: '输入你的回复...',
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border: OutlineInputBorder(
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borderRadius: BorderRadius.circular(24),
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),
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contentPadding: const EdgeInsets.symmetric(
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horizontal: 16,
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vertical: 12,
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),
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),
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maxLines: null,
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textInputAction: TextInputAction.send,
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onSubmitted: (text) => _sendTextMessage(provider, text),
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),
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),
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const SizedBox(width: 8),
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FloatingActionButton(
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mini: true,
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onPressed: () => _sendTextMessage(provider, _textController.text),
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child: const Icon(Icons.send),
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),
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],
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);
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}
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Widget _buildVoiceInput(SpeakingProvider provider) {
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return Column(
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children: [
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// 录音按钮
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GestureDetector(
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onTapDown: (_) => provider.startRecording(),
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onTapUp: (_) => provider.stopRecording(),
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onTapCancel: () => provider.stopRecording(),
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child: Container(
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width: 80,
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height: 80,
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decoration: BoxDecoration(
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color: provider.isRecording
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? Colors.red
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: Theme.of(context).primaryColor,
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shape: BoxShape.circle,
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boxShadow: [
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BoxShadow(
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color: (provider.isRecording ? Colors.red : Theme.of(context).primaryColor)
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.withOpacity(0.3),
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blurRadius: 10,
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spreadRadius: provider.isRecording ? 5 : 0,
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),
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],
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),
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child: Icon(
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provider.isRecording ? Icons.stop : Icons.mic,
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color: Colors.white,
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size: 32,
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),
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),
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),
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const SizedBox(height: 16),
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// 录音提示
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Text(
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provider.isRecording ? '松开发送' : '按住说话',
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style: TextStyle(
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color: Colors.grey[600],
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fontSize: 14,
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),
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),
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// 录音时长
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if (provider.isRecording)
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Padding(
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padding: const EdgeInsets.only(top: 8),
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child: Text(
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_formatRecordingDuration(const Duration(seconds: 0)),
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style: const TextStyle(
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color: Colors.red,
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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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],
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);
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}
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void _sendTextMessage(SpeakingProvider provider, String text) {
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if (text.trim().isEmpty) return;
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provider.sendMessage(text.trim());
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_textController.clear();
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}
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void _showEndConversationDialog() {
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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('结束对话'),
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content: const Text('确定要结束当前对话吗？对话记录将被保存。'),
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actions: [
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TextButton(
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onPressed: () => Navigator.pop(context),
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child: const Text('取消'),
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),
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TextButton(
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onPressed: () {
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Navigator.pop(context);
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context.read<SpeakingProvider>().endConversation();
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Navigator.pop(context);
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},
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child: const Text('确定'),
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),
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],
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),
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);
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}
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String _formatTime(DateTime time) {
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return '${time.hour.toString().padLeft(2, '0')}:${time.minute.toString().padLeft(2, '0')}';
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}
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String _formatRecordingDuration(Duration duration) {
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final minutes = duration.inMinutes;
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final seconds = duration.inSeconds % 60;
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return '${minutes.toString().padLeft(2, '0')}:${seconds.toString().padLeft(2, '0')}';
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}
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Color _getConfidenceColor(double confidence) {
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if (confidence >= 0.8) {
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return Colors.green;
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} else if (confidence >= 0.6) {
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return Colors.orange;
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} else {
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return Colors.red;
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}
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}
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} |