Forked from diegoveloper/main_collapsing_toolbar.dart
Created
November 10, 2020 02:06
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Collapsing AppBar when scrolling with SliverAppBar
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import 'package:flutter/material.dart'; | |
import 'package:flutter_icons/flutter_icons.dart'; | |
class MaterialsPage extends StatelessWidget { | |
@override | |
Widget build(BuildContext context) { | |
return MaterialPageView(); | |
} | |
} | |
class MaterialPageView extends StatefulWidget { | |
@override | |
_MaterialPageViewState createState() => _MaterialPageViewState(); | |
} | |
class _MaterialPageViewState extends State<MaterialPageView> { | |
@override | |
Widget build(BuildContext context) { | |
return Scaffold( | |
backgroundColor: Colors.white, | |
body: DefaultTabController( | |
length: 2, | |
child: NestedScrollView( | |
headerSliverBuilder: (BuildContext context, bool innerBoxIsScrolled) { | |
return [ | |
SliverAppBar( | |
floating: true, | |
pinned: true, | |
backgroundColor: Colors.grey[300], | |
iconTheme: IconThemeData(color: Colors.black), | |
actionsIconTheme: IconThemeData(color: Colors.black), | |
actions: [ | |
IconButton(icon: Icon(FontAwesome5.question_circle), onPressed: null) | |
], | |
flexibleSpace: FlexibleSpaceBar( | |
title: SafeArea( | |
child: Container( | |
alignment: Alignment.centerLeft, | |
margin: EdgeInsets.only(top: 8.333), | |
child: Text('Material', style: TextStyle(fontSize: 14, color: Colors.black)), | |
), | |
), | |
), | |
bottom: TabBar( | |
labelColor: Colors.black, | |
tabs: [ | |
Tab( | |
child: Container( | |
child: Text('Daftar Material'), | |
), | |
), | |
Tab( | |
child: Container( | |
child: Text('Daftar Supplier'), | |
), | |
) | |
], | |
), | |
), | |
]; | |
}, | |
body: Container( | |
margin: EdgeInsets.all(6), | |
child: TabBarView( | |
children: [ | |
Text('Coba'), | |
Text('Supplier') | |
], | |
), | |
) | |
) | |
), | |
); | |
} | |
} | |
class _SliverAppBarDelegate extends SliverPersistentHeaderDelegate { | |
_SliverAppBarDelegate(this._tabBar); | |
final TabBar _tabBar; | |
@override | |
double get minExtent => _tabBar.preferredSize.height; | |
@override | |
double get maxExtent => _tabBar.preferredSize.height; | |
@override | |
Widget build( | |
BuildContext context, double shrinkOffset, bool overlapsContent) { | |
return new Container( | |
color: Colors.white, | |
child: _tabBar, | |
); | |
} | |
@override | |
bool shouldRebuild(_SliverAppBarDelegate oldDelegate) { | |
return false; | |
} | |
} |
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