blob: f76d3fb7ee897fac71c76df1749341fba9406068 [file] [log] [blame]
// 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
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> {
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: Container(
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.headline4,
),
Text(
'The cursor is here: (${x.toStringAsFixed(2)}, ${y.toStringAsFixed(2)})',
),
],
),
),
),
);
}
}