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December 9, 2019 14:29
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sliding_cards.dart
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import 'package:flutter/material.dart'; | |
import 'package:flutter/rendering.dart'; | |
import 'dart:math' as math; | |
class SlidingCardsView extends StatefulWidget { | |
@override | |
_SlidingCardsViewState createState() => _SlidingCardsViewState(); | |
} | |
class _SlidingCardsViewState extends State<SlidingCardsView> { | |
PageController pageController; | |
double pageOffset = 0; | |
@override | |
void initState() { | |
super.initState(); | |
pageController = PageController(viewportFraction: 0.8); | |
pageController.addListener(() { | |
setState(() => pageOffset = pageController.page); | |
}); | |
} | |
@override | |
void dispose() { | |
pageController.dispose(); | |
super.dispose(); | |
} | |
@override | |
Widget build(BuildContext context) { | |
return SizedBox( | |
height: MediaQuery.of(context).size.height * 0.55, | |
child: PageView( | |
controller: pageController, | |
children: <Widget>[ | |
SlidingCard( | |
name: 'Shenzhen GLOBAL DESIGN AWARD 2018', | |
date: '4.20-30', | |
assetName: 'steve-johnson.jpeg', | |
offset: pageOffset, | |
), | |
SlidingCard( | |
name: 'Dawan District, Guangdong Hong Kong and Macao', | |
date: '4.28-31', | |
assetName: 'rodion-kutsaev.jpeg', | |
offset: pageOffset - 1, | |
), | |
], | |
), | |
); | |
} | |
} | |
class SlidingCard extends StatelessWidget { | |
final String name; | |
final String date; | |
final String assetName; | |
final double offset; | |
const SlidingCard({ | |
Key key, | |
@required this.name, | |
@required this.date, | |
@required this.assetName, | |
@required this.offset, | |
}) : super(key: key); | |
@override | |
Widget build(BuildContext context) { | |
double gauss = math.exp(-(math.pow((offset.abs() - 0.5), 2) / 0.08)); | |
return Transform.translate( | |
offset: Offset(-32 * gauss * offset.sign, 0), | |
child: Card( | |
margin: EdgeInsets.only(left: 8, right: 8, bottom: 24), | |
elevation: 8, | |
shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(32)), | |
child: Column( | |
children: <Widget>[ | |
ClipRRect( | |
borderRadius: BorderRadius.vertical(top: Radius.circular(32)), | |
child: Image.asset( | |
'assets/$assetName', | |
height: MediaQuery.of(context).size.height * 0.3, | |
alignment: Alignment(-offset.abs(), 0), | |
fit: BoxFit.none, | |
), | |
), | |
SizedBox(height: 8), | |
Expanded( | |
child: CardContent( | |
name: name, | |
date: date, | |
offset: gauss, | |
), | |
), | |
], | |
), | |
), | |
); | |
} | |
} | |
class CardContent extends StatelessWidget { | |
final String name; | |
final String date; | |
final double offset; | |
const CardContent( | |
{Key key, | |
@required this.name, | |
@required this.date, | |
@required this.offset}) | |
: super(key: key); | |
@override | |
Widget build(BuildContext context) { | |
return Padding( | |
padding: const EdgeInsets.all(8.0), | |
child: Column( | |
crossAxisAlignment: CrossAxisAlignment.start, | |
children: <Widget>[ | |
Transform.translate( | |
offset: Offset(8 * offset, 0), | |
child: Text(name, style: TextStyle(fontSize: 20)), | |
), | |
SizedBox(height: 8), | |
Transform.translate( | |
offset: Offset(32 * offset, 0), | |
child: Text( | |
date, | |
style: TextStyle(color: Colors.grey), | |
), | |
), | |
Spacer(), | |
Row( | |
children: <Widget>[ | |
Transform.translate( | |
offset: Offset(48 * offset, 0), | |
child: RaisedButton( | |
color: Color(0xFF162A49), | |
child: Transform.translate( | |
offset: Offset(24 * offset, 0), | |
child: Text('Reserve'), | |
), | |
textColor: Colors.white, | |
shape: RoundedRectangleBorder( | |
borderRadius: BorderRadius.circular(32), | |
), | |
onPressed: () {}, | |
), | |
), | |
Spacer(), | |
Transform.translate( | |
offset: Offset(32 * offset, 0), | |
child: Text( | |
'0.00 \$', | |
style: TextStyle( | |
fontWeight: FontWeight.bold, | |
fontSize: 20, | |
), | |
), | |
), | |
SizedBox(width: 16), | |
], | |
) | |
], | |
), | |
); | |
} | |
} |
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