flutter/examples/api/lib/widgets/magnifier/magnifier.0.dart
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---------

Co-authored-by: Kate Lovett <katelovett@google.com>
Co-authored-by: LongCatIsLooong <31859944+LongCatIsLooong@users.noreply.github.com>
2024-12-19 20:06:21 +00:00

64 lines
2.2 KiB
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.
import 'package:flutter/material.dart';
void main() => runApp(const MagnifierExampleApp());
class MagnifierExampleApp extends StatefulWidget {
const MagnifierExampleApp({super.key});
@override
State<MagnifierExampleApp> createState() => _MagnifierExampleAppState();
}
class _MagnifierExampleAppState extends State<MagnifierExampleApp> {
static const double magnifierRadius = 50.0;
Offset dragGesturePosition = const Offset(100, 100);
@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
const Text('Drag on the logo!'),
RepaintBoundary(
child: Stack(
children: <Widget>[
GestureDetector(
onPanUpdate:
(DragUpdateDetails details) => setState(() {
dragGesturePosition = details.localPosition;
}),
onPanDown:
(DragDownDetails details) => setState(() {
dragGesturePosition = details.localPosition;
}),
child: const FlutterLogo(size: 200),
),
Positioned(
left: dragGesturePosition.dx - magnifierRadius,
top: dragGesturePosition.dy - magnifierRadius,
child: const RawMagnifier(
decoration: MagnifierDecoration(
shape: CircleBorder(side: BorderSide(color: Colors.pink, width: 3)),
),
size: Size(magnifierRadius * 2, magnifierRadius * 2),
magnificationScale: 2,
),
),
],
),
),
],
),
),
),
);
}
}