// 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. import 'package:flutter/material.dart'; /// Flutter code sample for [MouseRegion]. void main() => runApp(const MouseRegionApp()); class MouseRegionApp extends StatelessWidget { const MouseRegionApp({super.key}); @override Widget build(BuildContext context) { return MaterialApp( home: Scaffold( appBar: AppBar(title: const Text('MouseRegion Sample')), body: const Center( child: MouseRegionExample(), ), ), ); } } class MouseRegionExample extends StatefulWidget { const MouseRegionExample({super.key}); @override State<MouseRegionExample> createState() => _MouseRegionExampleState(); } class _MouseRegionExampleState extends State<MouseRegionExample> { int _enterCounter = 0; int _exitCounter = 0; double x = 0.0; double y = 0.0; void _incrementEnter(PointerEvent details) { setState(() { _enterCounter++; }); } void _incrementExit(PointerEvent details) { setState(() { _exitCounter++; }); } void _updateLocation(PointerEvent details) { setState(() { x = details.position.dx; y = details.position.dy; }); } @override Widget build(BuildContext context) { return ConstrainedBox( constraints: BoxConstraints.tight(const Size(300.0, 200.0)), child: MouseRegion( onEnter: _incrementEnter, onHover: _updateLocation, onExit: _incrementExit, child: ColoredBox( color: Colors.lightBlueAccent, child: Column( mainAxisAlignment: MainAxisAlignment.center, children: <Widget>[ const Text('You have entered or exited this box this many times:'), Text( '$_enterCounter Entries\n$_exitCounter Exits', style: Theme.of(context).textTheme.headlineMedium, ), Text( 'The cursor is here: (${x.toStringAsFixed(2)}, ${y.toStringAsFixed(2)})', ), ], ), ), ), ); } }