Swipe List Item for more options (Flutter)
AndroidIosAnimationDartFlutterAndroid Problem Overview
Somedays ago I decided to choose an Ui for an app from Pinterest to practice building apps with Flutter but I'm stuck with the Slider which shows an "more" and "delete" button on horizontal drag. Picture on the right.
I don't have enough knowledge to use Gestures combined with Animations to create something like this in flutter. Thats why I hope that someone of you can make an example for everyone like me that we can understand how to implement something like this in a ListView.builder.
An gif example from the macOS mail App:
Android Solutions
Solution 1 - Android
I created a package for doing this kind of layout: [flutter_slidable][1] (Thanks Rémi Rousselet for the based idea)
With this package it's easier to create contextual actions for a list item. For example if you want to create the kind of animation you described:
[![Drawer (iOS) animation][2]][2]
You will use this code:
new Slidable(
delegate: new SlidableDrawerDelegate(),
actionExtentRatio: 0.25,
child: new Container(
color: Colors.white,
child: new ListTile(
leading: new CircleAvatar(
backgroundColor: Colors.indigoAccent,
child: new Text('$3'),
foregroundColor: Colors.white,
),
title: new Text('Tile n°$3'),
subtitle: new Text('SlidableDrawerDelegate'),
),
),
actions: <Widget>[
new IconSlideAction(
caption: 'Archive',
color: Colors.blue,
icon: Icons.archive,
onTap: () => _showSnackBar('Archive'),
),
new IconSlideAction(
caption: 'Share',
color: Colors.indigo,
icon: Icons.share,
onTap: () => _showSnackBar('Share'),
),
],
secondaryActions: <Widget>[
new IconSlideAction(
caption: 'More',
color: Colors.black45,
icon: Icons.more_horiz,
onTap: () => _showSnackBar('More'),
),
new IconSlideAction(
caption: 'Delete',
color: Colors.red,
icon: Icons.delete,
onTap: () => _showSnackBar('Delete'),
),
],
);
[1]: https://github.com/letsar/flutter_slidable "flutter_slidable" [2]: https://i.stack.imgur.com/oPqGI.gif
Solution 2 - Android
There's already a widget for this kind of gesture. It's called Dismissible.
You can find it here. https://docs.flutter.io/flutter/widgets/Dismissible-class.html
EDIT
If you need the exact same transtion, you'd probably have to implement if yourself. I made a basic example. You'd probably want to tweak the animation a bit, but it's working at least.
class Test extends StatefulWidget {
@override
_TestState createState() => new _TestState();
}
class _TestState extends State<Test> {
double rating = 3.5;
@override
Widget build(BuildContext context) {
return new Scaffold(
body: new ListView(
children: ListTile
.divideTiles(
context: context,
tiles: new List.generate(42, (index) {
return new SlideMenu(
child: new ListTile(
title: new Container(child: new Text("Drag me")),
),
menuItems: <Widget>[
new Container(
child: new IconButton(
icon: new Icon(Icons.delete),
),
),
new Container(
child: new IconButton(
icon: new Icon(Icons.info),
),
),
],
);
}),
)
.toList(),
),
);
}
}
class SlideMenu extends StatefulWidget {
final Widget child;
final List<Widget> menuItems;
SlideMenu({this.child, this.menuItems});
@override
_SlideMenuState createState() => new _SlideMenuState();
}
class _SlideMenuState extends State<SlideMenu> with SingleTickerProviderStateMixin {
AnimationController _controller;
@override
initState() {
super.initState();
_controller = new AnimationController(vsync: this, duration: const Duration(milliseconds: 200));
}
@override
dispose() {
_controller.dispose();
super.dispose();
}
@override
Widget build(BuildContext context) {
final animation = new Tween(
begin: const Offset(0.0, 0.0),
end: const Offset(-0.2, 0.0)
).animate(new CurveTween(curve: Curves.decelerate).animate(_controller));
return new GestureDetector(
onHorizontalDragUpdate: (data) {
// we can access context.size here
setState(() {
_controller.value -= data.primaryDelta / context.size.width;
});
},
onHorizontalDragEnd: (data) {
if (data.primaryVelocity > 2500)
_controller.animateTo(.0); //close menu on fast swipe in the right direction
else if (_controller.value >= .5 || data.primaryVelocity < -2500) // fully open if dragged a lot to left or on fast swipe to left
_controller.animateTo(1.0);
else // close if none of above
_controller.animateTo(.0);
},
child: new Stack(
children: <Widget>[
new SlideTransition(position: animation, child: widget.child),
new Positioned.fill(
child: new LayoutBuilder(
builder: (context, constraint) {
return new AnimatedBuilder(
animation: _controller,
builder: (context, child) {
return new Stack(
children: <Widget>[
new Positioned(
right: .0,
top: .0,
bottom: .0,
width: constraint.maxWidth * animation.value.dx * -1,
child: new Container(
color: Colors.black26,
child: new Row(
children: widget.menuItems.map((child) {
return new Expanded(
child: child,
);
}).toList(),
),
),
),
],
);
},
);
},
),
)
],
),
);
}
}
EDIT
Flutter no longer allows type Animation<FractionalOffset> in SlideTransition animation property. According to this post https://groups.google.com/forum/#!topic/flutter-dev/fmr-C9xK5t4 it should be replaced with AlignmentTween but this also doesn't work. Instead, according to this issue: https://github.com/flutter/flutter/issues/13812 replacing it instead with a raw Tween and directly creating Offset object works instead. Unfortunately, the code is much less clear.
Solution 3 - Android
Updated Code with Null Safety: Flutter: 2.x Firstly you need to add the flutter_slidable package in your project and add below code then Let's enjoy...
Slidable(
actionPane: SlidableDrawerActionPane(),
actionExtentRatio: 0.25,
child: Container(
color: Colors.white,
child: ListTile(
leading: CircleAvatar(
backgroundColor: Colors.indigoAccent,
child: Text('$3'),
foregroundColor: Colors.white,
),
title: Text('Tile n°$3'),
subtitle: Text('SlidableDrawerDelegate'),
),
),
actions: <Widget>[
IconSlideAction(
caption: 'Archive',
color: Colors.blue,
icon: Icons.archive,
onTap: () => _showSnackBar('Archive'),
),
IconSlideAction(
caption: 'Share',
color: Colors.indigo,
icon: Icons.share,
onTap: () => _showSnackBar('Share'),
),
],
secondaryActions: <Widget>[
IconSlideAction(
caption: 'More',
color: Colors.black45,
icon: Icons.more_horiz,
onTap: () => _showSnackBar('More'),
),
IconSlideAction(
caption: 'Delete',
color: Colors.red,
icon: Icons.delete,
onTap: () => _showSnackBar('Delete'),
),
],
);
Solution 4 - Android
I have a task that needs the same swipeable menu actions I tried answeres of Romain Rastel and Rémi Rousselet. but I have complex widget tree. the issue with that slideable solutions is they go on other widgets(to left widgets of listview). I found a batter solution here someone wrote a nice article medium and GitHub sample is here.