89 lines
2.6 KiB
Dart
89 lines
2.6 KiB
Dart
/**
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* 加载覆盖层组件
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*
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* 在内容加载过程中显示的半透明渐变覆盖层，提供直观的加载状态反馈。
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* 显示在屏幕底部，包含加载指示器和自定义加载消息。
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*/
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import 'package:flutter/material.dart';
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/// 加载覆盖层组件
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///
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/// 用于在编辑器中显示内容加载状态。
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/// 设计为一个半透明的覆盖层，显示在主界面底部，
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/// 具有渐变背景和居中的指示器加消息。
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class LoadingOverlay extends StatelessWidget {
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/// 要显示的加载消息文本
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final String loadingMessage;
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/// 创建一个加载覆盖层
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///
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/// [loadingMessage] 要显示的加载消息
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const LoadingOverlay({
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Key? key,
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required this.loadingMessage,
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}) : super(key: key);
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@override
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Widget build(BuildContext context) {
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return Positioned(
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left: 0,
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right: 0,
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bottom: 0,
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child: Container(
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height: 80,
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// 渐变背景从透明到白色
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decoration: BoxDecoration(
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gradient: LinearGradient(
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begin: Alignment.topCenter,
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end: Alignment.bottomCenter,
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colors: [
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Colors.white.withOpacity(0.0),
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Colors.white.withOpacity(0.8),
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Colors.white,
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],
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),
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),
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child: Center(
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child: Container(
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padding: const EdgeInsets.symmetric(vertical: 12, horizontal: 24),
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// 消息容器的样式，圆角白色卡片带阴影
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decoration: BoxDecoration(
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color: Colors.white,
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borderRadius: BorderRadius.circular(30),
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boxShadow: [
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BoxShadow(
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color: Colors.black.withOpacity(0.1),
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blurRadius: 8,
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offset: const Offset(0, 2),
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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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// 加载指示器
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SizedBox(
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width: 20,
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height: 20,
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child: CircularProgressIndicator(
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strokeWidth: 3,
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valueColor: AlwaysStoppedAnimation<Color>(Colors.blue.shade700),
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),
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),
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const SizedBox(width: 12),
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// 加载消息文本
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Text(
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loadingMessage,
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style: TextStyle(
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color: Colors.grey.shade800,
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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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),
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);
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}
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} |