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// 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 [AnimatedPadding].
void main() => runApp(const AnimatedPaddingExampleApp());
class AnimatedPaddingExampleApp extends StatelessWidget {
const AnimatedPaddingExampleApp({super.key});
@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
appBar: AppBar(title: const Text('AnimatedPadding Sample')),
body: const AnimatedPaddingExample(),
),
);
}
}
class AnimatedPaddingExample extends StatefulWidget {
const AnimatedPaddingExample({super.key});
@override
State<AnimatedPaddingExample> createState() => _AnimatedPaddingExampleState();
}
class _AnimatedPaddingExampleState extends State<AnimatedPaddingExample> {
double padValue = 0.0;
void _updatePadding(double value) {
setState(() {
padValue = value;
});
}
@override
Widget build(BuildContext context) {
return Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
AnimatedPadding(
padding: EdgeInsets.all(padValue),
duration: const Duration(seconds: 2),
curve: Curves.easeInOut,
child: Container(
width: MediaQuery.of(context).size.width,
height: MediaQuery.of(context).size.height / 5,
color: Colors.blue,
),
),
Text('Padding: $padValue'),
ElevatedButton(
child: const Text('Change padding'),
onPressed: () {
_updatePadding(padValue == 0.0 ? 100.0 : 0.0);
}),
],
);
}
}