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Description:

swipedetector

swipedetector #
A Flutter package to detect up, down, left, right swipes.
Getting Started #
For help getting started with Flutter, view our online
documentation.
Usage #
Using SwipeDetector is straightforward, just wrap it around the Widget you want to detect swipes on.
SwipeDetector(
child: ... //You Widget Tree here
),
onSwipeUp: () {
setState(() {
_swipeDirection = "Swipe Up";
});
},
onSwipeDown: () {
setState(() {
_swipeDirection = "Swipe Down";
});
},
onSwipeLeft: () {
setState(() {
_swipeDirection = "Swipe Left";
});
},
onSwipeRight: () {
setState(() {
_swipeDirection = "Swipe Right";
});
},
)
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Configuration Options #
In case you don't require the default configuration and want to tune the sensitivity of swipes, you can pass your own configuration values.
SwipeDetector(
child: ... //You Widget Tree here
),
onSwipeUp: ...
onSwipeDown: ...
onSwipeLeft: ...
onSwipeRight: ...,
swipeConfiguration: SwipeConfiguration(
verticalSwipeMinVelocity: 100.0,
verticalSwipeMinDisplacement: 50.0,
verticalSwipeMaxWidthThreshold:100.0,
horizontalSwipeMaxHeightThreshold: 50.0,
horizontalSwipeMinDisplacement:50.0,
horizontalSwipeMinVelocity: 200.0),
),
)
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All the parameters are optional, so you can register for any swipe direction and provide any configuration value.
Here is a simple example. Copy and Past to run it.
import 'package:flutter/material.dart';
import 'package:swipedetector/swipedetector.dart';

void main() => runApp(new MyApp());

class MyApp extends StatelessWidget {
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
return new MaterialApp(
title: 'Flutter Demo',
theme: new ThemeData(
primarySwatch: Colors.blue,
),
home: new MyHomePage(),
debugShowCheckedModeBanner: false,
);
}
}

class MyHomePage extends StatefulWidget {
@override
_MyHomePageState createState() => new _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
String _swipeDirection = "";

@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(),
body: Center(
child: Container(
child: Row(
children: <Widget>[
Expanded(
child: SwipeDetector(
child: Card(
child: Container(
padding: EdgeInsets.only(
top: 80.0,
bottom: 80.0,
left: 16.0,
right: 16.0,
),
child: Column(
mainAxisSize: MainAxisSize.min,
children: <Widget>[
Text(
'Swipe Me!',
style: TextStyle(
fontSize: 40.0,
),
),
Text(
'$_swipeDirection',
style: TextStyle(),
),
],
),
),
),
onSwipeUp: () {
setState(() {
_swipeDirection = "Swipe Up";
});
},
onSwipeDown: () {
setState(() {
_swipeDirection = "Swipe Down";
});
},
onSwipeLeft: () {
setState(() {
_swipeDirection = "Swipe Left";
});
},
onSwipeRight: () {
setState(() {
_swipeDirection = "Swipe Right";
});
},
swipeConfiguration: SwipeConfiguration(
verticalSwipeMinVelocity: 100.0,
verticalSwipeMinDisplacement: 50.0,
verticalSwipeMaxWidthThreshold:100.0,
horizontalSwipeMaxHeightThreshold: 50.0,
horizontalSwipeMinDisplacement:50.0,
horizontalSwipeMinVelocity: 200.0),
),
)
],
),
),
),
);
}
}
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