360 lines
11 KiB
Dart
360 lines
11 KiB
Dart
import 'dart:async';
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import 'package:flutter/material.dart';
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/// 现代化AI设计的模糊占位组件
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class AIShimmerPlaceholder extends StatefulWidget {
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const AIShimmerPlaceholder({Key? key}) : super(key: key);
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@override
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State<AIShimmerPlaceholder> createState() => _AIShimmerPlaceholderState();
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}
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class _AIShimmerPlaceholderState extends State<AIShimmerPlaceholder>
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with TickerProviderStateMixin {
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late AnimationController _shimmerController;
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late AnimationController _pulseController;
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late Animation<double> _shimmerAnimation;
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late Animation<double> _pulseAnimation;
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String _currentMessage = 'AI 正在构思设定架构...';
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late Timer _messageTimer;
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@override
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void initState() {
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super.initState();
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_shimmerController = AnimationController(
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duration: const Duration(milliseconds: 2000),
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vsync: this,
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);
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_pulseController = AnimationController(
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duration: const Duration(milliseconds: 1500),
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vsync: this,
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);
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_shimmerAnimation = Tween<double>(
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begin: -1.0,
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end: 2.0,
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).animate(CurvedAnimation(
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parent: _shimmerController,
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curve: Curves.easeInOut,
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));
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_pulseAnimation = Tween<double>(
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begin: 0.3,
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end: 0.7,
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).animate(CurvedAnimation(
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parent: _pulseController,
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curve: Curves.easeInOut,
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));
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// 首帧后再启动动画，避免在构建/热重启过程中驱动渲染
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WidgetsBinding.instance.addPostFrameCallback((_) {
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if (!mounted) return;
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_shimmerController.repeat();
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_pulseController.repeat(reverse: true);
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// 定期更换提示消息
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_messageTimer = Timer.periodic(const Duration(milliseconds: 2500), (timer) {
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if (mounted) {
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setState(() {
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_currentMessage = _getRandomMessage();
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});
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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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void dispose() {
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if (_shimmerController.isAnimating) {
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_shimmerController.stop();
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}
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if (_pulseController.isAnimating) {
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_pulseController.stop();
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}
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_shimmerController.dispose();
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_pulseController.dispose();
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_messageTimer.cancel();
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super.dispose();
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}
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String _getRandomMessage() {
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final messages = [
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'AI 正在构思设定架构...',
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'正在分析故事背景...',
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'构建世界观体系中...',
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'生成角色关系网络...',
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'设计情节主线框架...',
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'创造独特的设定元素...',
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];
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return messages[DateTime.now().millisecond % messages.length];
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}
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@override
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Widget build(BuildContext context) {
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final isDark = Theme.of(context).brightness == Brightness.dark;
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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: isDark
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? const Color(0xFF1F2937).withOpacity(0.3)
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: const Color(0xFFF9FAFB).withOpacity(0.3),
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borderRadius: BorderRadius.circular(12),
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border: Border.all(
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color: isDark
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? const Color(0xFF374151)
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: const Color(0xFFE5E7EB),
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width: 1,
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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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// AI思考状态指示器
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AnimatedBuilder(
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animation: _pulseAnimation,
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builder: (context, child) {
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return Container(
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padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 12),
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decoration: BoxDecoration(
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color: const Color(0xFF6366F1).withOpacity(_pulseAnimation.value),
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borderRadius: BorderRadius.circular(24),
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boxShadow: [
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BoxShadow(
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color: const Color(0xFF6366F1).withOpacity(0.2),
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blurRadius: 8,
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spreadRadius: 1,
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),
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],
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),
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child: Row(
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mainAxisSize: MainAxisSize.min,
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children: [
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SizedBox(
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width: 16,
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height: 16,
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child: CircularProgressIndicator(
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strokeWidth: 2,
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valueColor: const AlwaysStoppedAnimation<Color>(Colors.white),
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),
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),
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const SizedBox(width: 12),
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AnimatedSwitcher(
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duration: const Duration(milliseconds: 600),
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child: Text(
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_currentMessage,
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key: ValueKey(_currentMessage),
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style: const TextStyle(
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color: Colors.white,
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fontWeight: FontWeight.w500,
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fontSize: 14,
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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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const SizedBox(height: 24),
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// 模糊的节点占位符
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Expanded(
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child: SingleChildScrollView(
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child: Column(
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children: List.generate(8, (index) {
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return Padding(
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padding: const EdgeInsets.only(bottom: 12),
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child: _buildShimmerNode(
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context,
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level: index < 3 ? 0 : (index < 6 ? 1 : 2),
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delay: index * 200.0,
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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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}
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Widget _buildShimmerNode(BuildContext context, {required int level, required double delay}) {
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final isDark = Theme.of(context).brightness == Brightness.dark;
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final leftPadding = level * 24.0 + 8.0;
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return AnimatedBuilder(
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animation: _shimmerAnimation,
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builder: (context, child) {
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return Container(
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margin: EdgeInsets.only(left: leftPadding),
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padding: const EdgeInsets.all(12),
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decoration: BoxDecoration(
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borderRadius: BorderRadius.circular(8),
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gradient: LinearGradient(
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begin: Alignment.centerLeft,
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end: Alignment.centerRight,
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colors: [
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(isDark ? const Color(0xFF374151) : const Color(0xFFE5E7EB)).withOpacity(0.3),
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(isDark ? const Color(0xFF4B5563) : const Color(0xFFF3F4F6)).withOpacity(0.6),
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(isDark ? const Color(0xFF374151) : const Color(0xFFE5E7EB)).withOpacity(0.3),
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],
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stops: [
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(_shimmerAnimation.value - 1).clamp(0.0, 1.0),
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_shimmerAnimation.value.clamp(0.0, 1.0),
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(_shimmerAnimation.value + 1).clamp(0.0, 1.0),
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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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// 图标占位符
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Container(
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width: 16,
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height: 16,
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decoration: BoxDecoration(
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color: (isDark ? const Color(0xFF6B7280) : const Color(0xFF9CA3AF)).withOpacity(0.5),
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borderRadius: BorderRadius.circular(2),
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),
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),
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const SizedBox(width: 12),
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// 文字占位符
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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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Container(
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height: 14,
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width: double.infinity,
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decoration: BoxDecoration(
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color: (isDark ? const Color(0xFF6B7280) : const Color(0xFF9CA3AF)).withOpacity(0.5),
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borderRadius: BorderRadius.circular(4),
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),
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),
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const SizedBox(height: 6),
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Container(
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height: 12,
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width: MediaQuery.of(context).size.width * 0.6,
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decoration: BoxDecoration(
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color: (isDark ? const Color(0xFF6B7280) : const Color(0xFF9CA3AF)).withOpacity(0.3),
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borderRadius: BorderRadius.circular(4),
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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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);
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}
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}
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/// 现代化的AI加载指示器
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class AILoadingIndicator extends StatefulWidget {
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final String message;
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const AILoadingIndicator({
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Key? key,
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this.message = 'AI正在处理...',
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}) : super(key: key);
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@override
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State<AILoadingIndicator> createState() => _AILoadingIndicatorState();
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}
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class _AILoadingIndicatorState extends State<AILoadingIndicator>
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with TickerProviderStateMixin {
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late AnimationController _controller;
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late Animation<double> _scaleAnimation;
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late Animation<double> _opacityAnimation;
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@override
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void initState() {
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super.initState();
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_controller = AnimationController(
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duration: const Duration(milliseconds: 1200),
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vsync: this,
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)..repeat();
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_scaleAnimation = Tween<double>(
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begin: 0.8,
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end: 1.2,
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).animate(CurvedAnimation(
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parent: _controller,
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curve: Curves.easeInOut,
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));
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_opacityAnimation = Tween<double>(
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begin: 0.4,
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end: 1.0,
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).animate(CurvedAnimation(
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parent: _controller,
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curve: Curves.easeInOut,
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));
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}
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@override
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void dispose() {
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_controller.dispose();
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super.dispose();
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}
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@override
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Widget build(BuildContext context) {
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return Center(
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child: Column(
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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AnimatedBuilder(
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animation: _controller,
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builder: (context, child) {
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return Transform.scale(
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scale: _scaleAnimation.value,
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child: Opacity(
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opacity: _opacityAnimation.value,
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child: Container(
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width: 60,
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height: 60,
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decoration: BoxDecoration(
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shape: BoxShape.circle,
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gradient: const LinearGradient(
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colors: [Color(0xFF6366F1), Color(0xFF8B5CF6)],
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begin: Alignment.topLeft,
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end: Alignment.bottomRight,
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),
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boxShadow: [
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BoxShadow(
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color: const Color(0xFF6366F1).withOpacity(0.3),
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blurRadius: 20,
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spreadRadius: 5,
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),
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],
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),
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child: const Icon(
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Icons.psychology,
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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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);
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},
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),
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const SizedBox(height: 24),
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Text(
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widget.message,
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style: Theme.of(context).textTheme.titleMedium?.copyWith(
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fontWeight: FontWeight.w500,
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),
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textAlign: TextAlign.center,
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),
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],
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),
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);
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}
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} |