Created
May 27, 2021 14:19
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import 'dart:html'; | |
import 'package:flutter/cupertino.dart'; | |
import 'package:flutter/material.dart'; | |
import 'package:flutter/rendering.dart'; | |
import 'dart:js'; | |
import 'dart:ui' as ui; | |
Widget buildShowcaseWidget(BuildContext context) { | |
// TODO return an instance of your widget here | |
// Once your done, hit run and 'Screenshot & Publish' | |
} | |
// =========================================================================== | |
// Paste your code here | |
// =========================================================================== | |
void main() { | |
runApp(MaterialApp( | |
title: 'Snippet', | |
theme: ThemeData( | |
primarySwatch: Colors.blue, | |
), | |
home: Snippet(), | |
)); | |
} | |
var key = GlobalKey(); | |
class Snippet extends StatelessWidget { | |
@override | |
Widget build(BuildContext context) { | |
return Stack( | |
children: [ | |
Center( | |
child: RepaintBoundary( | |
key: key, | |
child: buildShowcaseWidget(context))), | |
Align( | |
alignment: Alignment.bottomCenter, | |
child: Padding( | |
padding: const EdgeInsets.only(bottom: 16), | |
child: ElevatedButton( | |
child: Text('Screenshot & Publish'), | |
onPressed: () { | |
captureImage(); | |
}, | |
), | |
), | |
), | |
], | |
); | |
} | |
} | |
Future<void> captureImage() async { | |
final boundary = | |
key.currentContext.findRenderObject() as RenderRepaintBoundary; | |
final image = await boundary.toImage(pixelRatio: 1); | |
final data = await image.toByteData(format: ui.ImageByteFormat.png); | |
var parent = context['window'].parent.parent; | |
parent.postMessage({'data': data}, '*'); | |
} |
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