How to update Draggable feedback widget while dragging? - flutter

Question

I'm trying to make a game where I need to be able to click on a button while dragging a widget and that button should render som changes to the feedback widget that the user is currently dragging. The childWhenDragging updates just fine but the feedback widget doesn't update during the drag. Is there any way to achieve this?
This is a basic example to recreate it.
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Draggable Test',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: MyHomePage(),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key}) : super(key: key);
#override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
int counter;
#override
void initState() {
this.counter = 0;
super.initState();
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Draggable Test'),
),
body: Column(
children: <Widget>[
Draggable(
child: Container(
color: Colors.red,
width: 100,
height: 100,
child: Text(counter.toString()),
),
feedback: Container(
color: Colors.red,
width: 100,
height: 100,
child: Text(counter.toString()),
),
childWhenDragging: Container(
color: Colors.red,
width: 100,
height: 100,
child: Text(counter.toString()),
),
),
RaisedButton(
onPressed: () {
setState(() {
counter += 1;
});
},
child: Text("plus"),
)
],
),
);
}
}
I expect the feedback widget to render the correct counter value but it never updates.