How can i make a moveable overlay? - flutter

Question

I want to show a minimize moveable calling screen in top of the app
I tried with stack it does not meet my expectation

Answer 1

#Raiyan, you have to use picture-in-picture concept to implement such floating child.
In flutter, multiple plugins are there, that we can use for the, some are as follows:
https://pub.dev/packages/pip_view
https://pub.dev/packages/floating
https://pub.dev/packages/easy_pip

Answer 2

floating package will fit in your case, it provides picture in Picture mode management for Flutter.

Answer 3

Sadly the gif is not working... But by on taping and draging on the green window will make the green window move.
Try this:
import 'dart:math';
import 'package:flutter/material.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({super.key});
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: const MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
const MyHomePage({super.key, required this.title});
final String title;
#override
State<MyHomePage> createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
int _counter = 0;
void _incrementCounter() {
setState(() {
_counter++;
});
}
#override
Widget build(BuildContext context) {
return OverlayWindow(
overlayChild: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: const [
Text(
"Overlay Window",
style: TextStyle(fontSize: 20),
),
Icon(
Icons.android,
size: 80,
),
],
),
child: Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
const Text(
'You have pushed the button this many times:',
),
Text(
'$_counter',
style: Theme.of(context).textTheme.headlineMedium,
),
],
),
),
floatingActionButton: FloatingActionButton(
onPressed: _incrementCounter,
tooltip: 'Increment',
child: const Icon(Icons.add),
),
),
);
}
}
class OverlayWindow extends StatefulWidget {
const OverlayWindow(
{Key? key, required this.overlayChild, required this.child})
: super(key: key);
final Widget overlayChild;
final Widget child;
#override
State<OverlayWindow> createState() => _OverlayWindowState();
}
class _OverlayWindowState extends State<OverlayWindow> {
double _top = 0;
double _left = 0;
#override
Widget build(BuildContext context) {
return Stack(
children: [
widget.child,
Positioned(
top: _top,
left: _left,
child: GestureDetector(
onPanUpdate: (details) {
setState(() {
_top = max(0, _top + details.delta.dy);
_left = max(0, _left + details.delta.dx);
});
},
child: Container(
height: 300,
width: 200,
color: Colors.green,
child: widget.overlayChild,
),
),
)
],
);
}
}
More about things like that, you can find here:
https://docs.flutter.dev/development/ui/advanced/gestures