Morpheus
A Flutter package for easily implementing Material Design navigation transitions.
Examples
Parent-child transition
You can use MorpheusPageRoute to create a parent-child transition between two screens.
import 'package:morpheus/morpheus.dart';
class MyList extends StatelessWidget {
@override
Widget build(BuildContext context) {
return ListView.builder(
itemCount: 10,
itemBuilder: (context, index) {
final _parentKey = GlobalKey();
return ListTile(
key: _parentKey,
leading: CircleAvatar(child: Text((index + 1).toString())),
title: Text('Item ${index + 1}'),
onTap: () => _handleTap(context, _parentKey),
);
}
);
}
void _handleTap(BuildContext context, GlobalKey parentKey) {
Navigator.of(context).push(MorpheusPageRoute(
builder: (context) => Scaffold(),
parentKey: parentKey,
));
}
}
Top-level transition
You can use the MorpheusTabView widget to create a top-level transition when the child widget changes.
import 'package:morpheus/morpheus.dart';
class MyTabScreen extends StatefulWidget {
@override
_MyTabScreenState createState() => _MyTabScreenState();
}
class _MyTabScreenState extends State<MyTabScreen> {
final List<Widget> _screens = [
Scaffold(backgroundColor: Colors.green),
Scaffold(backgroundColor: Colors.red),
Scaffold(backgroundColor: Colors.blue),
];
int _currentIndex = 0;
@override
Widget build(BuildContext context) {
return Scaffold(
body: MorpheusTabView(
child: _screens[_currentIndex]
),
bottomNavigationBar: BottomNavigationBar(
currentIndex: _currentIndex,
items: [
BottomNavigationBarItem(
icon: Icon(Icons.trending_up),
title: Text('Trending'),
),
BottomNavigationBarItem(
icon: Icon(Icons.star),
title: Text('Saved'),
),
],
onTap: (index) {
if (index != _currentIndex) {
setState(() => _currentIndex = index);
}
},
),
);
}
}