flutter/dev/a11y_assessments/lib/use_cases/navigation_bar.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

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2.0 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';
import '../utils.dart';
import 'use_cases.dart';
class NavigationBarUseCase extends UseCase {
@override
String get name => 'NavigationBar';
@override
String get route => '/navigation-bar';
@override
Widget build(BuildContext context) => const MainWidget();
}
class MainWidget extends StatefulWidget {
const MainWidget({super.key});
@override
State<MainWidget> createState() => MainWidgetState();
}
class MainWidgetState extends State<MainWidget> {
int currentPageIndex = 0;
String pageTitle = getUseCaseName(NavigationBarUseCase());
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
backgroundColor: Theme.of(context).colorScheme.inversePrimary,
title: Semantics(headingLevel: 1, child: Text('$pageTitle Demo')),
),
bottomNavigationBar: NavigationBar(
onDestinationSelected: (int index) {
setState(() {
currentPageIndex = index;
});
},
indicatorColor: Colors.amber[800],
selectedIndex: currentPageIndex,
destinations: const <Widget>[
NavigationDestination(
selectedIcon: Icon(Icons.home),
icon: Icon(Icons.home_outlined),
label: 'Home',
),
NavigationDestination(icon: Icon(Icons.business), label: 'Business'),
NavigationDestination(
selectedIcon: Icon(Icons.school),
icon: Icon(Icons.school_outlined),
label: 'School',
),
],
),
body:
<Widget>[
Container(alignment: Alignment.center, child: const Text('Page 1')),
Container(alignment: Alignment.center, child: const Text('Page 2')),
Container(alignment: Alignment.center, child: const Text('Page 3')),
][currentPageIndex],
);
}
}