flutter/examples/api/lib/widgets/basic/mouse_region.on_exit.0.dart

// Copyright 2014 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// Flutter code sample for MouseRegion.onExit

import 'package:flutter/material.dart';

void main() => runApp(const MyApp());

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  static const String _title = 'Flutter Code Sample';

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: _title,
      home: Scaffold(
        appBar: AppBar(title: const Text(_title)),
        body: const Center(
          child: MyStatefulWidget(),
        ),
      ),
    );
  }
}

class MyStatefulWidget extends StatefulWidget {
  const MyStatefulWidget({super.key});

  @override
  State<MyStatefulWidget> createState() => _MyStatefulWidgetState();
}

class _MyStatefulWidgetState extends State<MyStatefulWidget> {
  bool hovered = false;

  @override
  Widget build(BuildContext context) {
    return Container(
      height: 100,
      width: 100,
      decoration: BoxDecoration(color: hovered ? Colors.yellow : Colors.blue),
      child: MouseRegion(
        onEnter: (_) {
          setState(() {
            hovered = true;
          });
        },
        onExit: (_) {
          setState(() {
            hovered = false;
          });
        },
      ),
    );
  }
}