Popover for Flutter — https://github.com/minikin/popover
import 'package:flutter/material.dart';
import 'package:popover/popover.dart';

class PopoverExample extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
appBar: AppBar(title: const Text('Popover Example')),
body: const SafeArea(
child: Padding(
padding: EdgeInsets.all(16),
child: Button(),
),
),
),
);
}
}

class Button extends StatelessWidget {
const Button({Key key}) : super(key: key);

@override
Widget build(BuildContext context) {
return Container(
width: 80,
height: 40,
decoration: const BoxDecoration(
color: Colors.white,
borderRadius: BorderRadius.all(Radius.circular(5)),
boxShadow: [BoxShadow(color: Colors.black26, blurRadius:5)],
),
child: GestureDetector(
child: const Center(child: Text('Click Me')),
onTap: () {
showPopover(
context: context,
bodyBuilder: (context) => const ListItems(),
onPop: () => print('Popover was popped!'),
direction: PopoverDirection.top,
width: 200,
height: 400,
arrowHeight: 15,
arrowWidth: 30,
);
},
),
);
}
}

class ListItems extends StatelessWidget {
const ListItems({Key key}) : super(key: key);

@override
Widget build(BuildContext context) {
return Scrollbar(
child: Padding(
padding: const EdgeInsets.symmetric(vertical: 8),
child: ListView(
padding: const EdgeInsets.all(8),
children: [
InkWell(
onTap: () {
print('GestureDetector was called on Entry A');
Navigator.of(context).pop();
},
child: Container(
height: 50,
color: Colors.amber[100],
child: const Center(child: Text('Entry A')),
),
),
const Divider(),
Container(
height: 50,
color: Colors.amber[200],
child: const Center(child: Text('Entry B')),
),
],
),
),
);
}
}
Popover — https://github.com/minikin/popover

Software Engineer with a decade of experience in software engineering — https://minikin.me

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