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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 [FloatingActionButton].
void main() {
runApp(const FloatingActionButtonExampleApp());
}
class FloatingActionButtonExampleApp extends StatelessWidget {
const FloatingActionButtonExampleApp({ super.key });
@override
Widget build(BuildContext context) {
return MaterialApp(
theme: ThemeData(useMaterial3: true),
home: const FloatingActionButtonExample(),
);
}
}
class FloatingActionButtonExample extends StatefulWidget {
const FloatingActionButtonExample({ super.key });
@override
State<FloatingActionButtonExample> createState() => _FloatingActionButtonExampleState();
}
class _FloatingActionButtonExampleState extends State<FloatingActionButtonExample> {
// The FAB's foregroundColor, backgroundColor, and shape
static const List<(Color?, Color? background, ShapeBorder?)> customizations = <(Color?, Color?, ShapeBorder?)>[
(null, null, null), // The FAB uses its default for null parameters.
(null, Colors.green, null),
(Colors.white, Colors.green, null),
(Colors.white, Colors.green, CircleBorder()),
];
int index = 0; // Selects the customization.
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: const Text('FloatingActionButton Sample'),
),
body: const Center(child: Text('Press the button below!')),
floatingActionButton: FloatingActionButton(
onPressed: () {
setState(() {
index = (index + 1) % customizations.length;
});
},
foregroundColor: customizations[index].$1,
backgroundColor: customizations[index].$2,
shape: customizations[index].$3,
child: const Icon(Icons.navigation),
),
);
}
}