Flutter - Custom Clipper

import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';

class Customshape extends CustomClipper<Path>{
  @override
  Path getClip(Size size) {
    double height = size.height;
    double width = size.width;

    var path = Path();
    path.lineTo(0, height-50);
    path.quadraticBezierTo(width/2, height, width, height-50);
    path.lineTo(width, 0);
    path.close();
    return path;
  }

  @override
  bool shouldReclip(covariant CustomClipper<Path> oldClipper) {
    return true;
  }

}

import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';

import 'custom_shape.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({Key? key}) : super(key: key);

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar:  AppBar(
        toolbarHeight: 130,
        backgroundColor: Colors.transparent,
        elevation: 0.0,
        flexibleSpace: ClipPath(
          clipper: Customshape(),
          child: Container(
            height: 250,
            width: MediaQuery.of(context).size.width,
            color: Colors.green,
            child: Center(child: Text("GeeksforGeeks",
                                      style: TextStyle(fontSize: 40,
                                                                       color: Colors.white),)),
          ),
        ),
      ),
       body: Container(),
    );
  }
}