49 lines
1.3 KiB
Dart
49 lines
1.3 KiB
Dart
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import 'package:flutter/material.dart';
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import 'dart:typed_data';
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import 'package:flutter/rendering.dart';
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import 'dart:ui' as ui;
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class WidgetsToImage extends StatelessWidget {
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final Widget? child;
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final WidgetsToImageController controller;
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const WidgetsToImage({
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Key? key,
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required this.child,
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required this.controller,
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}) : super(key: key);
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@override
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Widget build(BuildContext context) {
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/// to capture widget to image by GlobalKey in RepaintBoundary
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return RepaintBoundary(
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key: controller.containerKey,
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child: child,
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);
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}
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}
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class WidgetsToImageController {
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GlobalKey containerKey = GlobalKey();
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/// to capture widget to image by GlobalKey in RenderRepaintBoundary
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Future<Uint8List?> capture() async {
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try {
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/// boundary widget by GlobalKey
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RenderRepaintBoundary? boundary = containerKey.currentContext
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?.findRenderObject() as RenderRepaintBoundary?;
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// double dpr = ui.window.devicePixelRatio;
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/// convert boundary to image
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final image = await boundary!.toImage(pixelRatio: 2.0);
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/// set ImageByteFormat
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final byteData = await image.toByteData(format: ui.ImageByteFormat.png);
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final pngBytes = byteData?.buffer.asUint8List();
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return pngBytes;
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} catch (e) {
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rethrow;
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}
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}
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}
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