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// Copyright 2014 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
import 'package:flutter/material.dart';
/// Flutter code sample for [Draggable].
void main() => runApp(const DraggableExampleApp());
class DraggableExampleApp extends StatelessWidget {
const DraggableExampleApp({super.key});
@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
appBar: AppBar(title: const Text('Draggable Sample')),
body: const DraggableExample(),
),
);
}
}
class DraggableExample extends StatefulWidget {
const DraggableExample({super.key});
@override
State<DraggableExample> createState() => _DraggableExampleState();
}
class _DraggableExampleState extends State<DraggableExample> {
int acceptedData = 0;
@override
Widget build(BuildContext context) {
return Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: <Widget>[
Draggable<int>(
// Data is the value this Draggable stores.
data: 10,
feedback: Container(
color: Colors.deepOrange,
height: 100,
width: 100,
child: const Icon(Icons.directions_run),
),
childWhenDragging: Container(
height: 100.0,
width: 100.0,
color: Colors.pinkAccent,
child: const Center(
child: Text('Child When Dragging'),
),
),
child: Container(
height: 100.0,
width: 100.0,
color: Colors.lightGreenAccent,
child: const Center(
child: Text('Draggable'),
),
),
),
DragTarget<int>(
builder: (
BuildContext context,
List<dynamic> accepted,
List<dynamic> rejected,
) {
return Container(
height: 100.0,
width: 100.0,
color: Colors.cyan,
child: Center(
child: Text('Value is updated to: $acceptedData'),
),
);
},
onAccept: (int data) {
setState(() {
acceptedData += data;
});
},
),
],
);
}
}