颤动将阴影应用于CustomPainted构件

import 'package:flutter/material.dart';

class MyCustomPainter extends CustomPainter {
  @override
  void paint(Canvas canvas, Size size) {
    // 绘制自定义图形
    // ...

    // 创建阴影效果
    final shadowPaint = Paint()
      ..color = Colors.grey.withOpacity(0.5) // 阴影颜色
      ..maskFilter = MaskFilter.blur(BlurStyle.normal, 10.0) // 模糊半径
      ..blendMode = BlendMode.srcOver; // 混合模式

    // 应用阴影效果
    canvas.drawShadow(
      // 阴影的路径
      Path()..addRect(Rect.fromLTWH(0, 0, size.width, size.height)),
      // 阴影颜色
      Colors.grey.withOpacity(0.5),
      // 模糊半径
      10.0,
      // 是否绘制阴影外部的区域
      true,
    );
  }

  @override
  bool shouldRepaint(covariant CustomPainter oldDelegate) {
    return false;
  }
}

class MyCustomPaintedWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return CustomPaint(
      painter: MyCustomPainter(),
      child: Container(
        width: 200,
        height: 200,
      ),
    );
  }
}

void main() {
  runApp(MaterialApp(
    home: Scaffold(
      appBar: AppBar(
        title: Text('Custom Painted Widget'),
      ),
      body: Center(
        child: MyCustomPaintedWidget(),
      ),
    ),
  ));
}