"pagecontroller flutter swipe detection" Code Answer's
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pagecontroller flutter swipe detection
class MyPageView extends StatefulWidget {
@override
_MyPageViewState createState() => _MyPageViewState();
}
class _MyPageViewState extends State<MyPageView> {
PageController _pageController;
Duration pageTurnDuration = Duration(milliseconds: 500);
Curve pageTurnCurve = Curves.ease;
@override
void initState() {
super.initState();
// The PageController allows us to instruct the PageView to change pages.
_pageController = PageController();
}
void _goForward() {
_pageController.nextPage(duration: pageTurnDuration, curve: pageTurnCurve);
}
void _goBack() {
_pageController.previousPage(
duration: pageTurnDuration, curve: pageTurnCurve);
}
@override
Widget build(BuildContext context) {
return Scaffold(
body: GestureDetector(
// Using the DragEndDetails allows us to only fire once per swipe.
onHorizontalDragEnd: (dragEndDetails) {
if (dragEndDetails.primaryVelocity < 0) {
// Page forwards
print('Move page forwards');
_goForward();
} else if (dragEndDetails.primaryVelocity > 0) {
// Page backwards
print('Move page backwards');
_goBack();
}
},
child: PageView.builder(
itemCount: 10,
controller: _pageController,
// NeverScrollableScrollPhysics disables PageView built-in gestures.
physics: NeverScrollableScrollPhysics(),
itemBuilder: (context, index) {
return new Center(child: Text('item ${++index}'));
}),
),
);
}
}
Source: stackoverflow.com
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