import 'dart:convert';
import 'dart:io';
import 'dart:typed_data';
import 'dart:ui';

import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter/rendering.dart';

///对widget截图

class CaptureWidget extends StatelessWidget {
//截图组件
  GlobalKey rootWidgetKey = GlobalKey();
  final Widget widget;
  final CaptureController captureController;

  CaptureWidget({required this.widget, required this.captureController}) {
    captureController.setGlobalKey(rootWidgetKey);
  }

  @override
  Widget build(BuildContext context) {
    return RepaintBoundary(key: rootWidgetKey, child: widget);
  }
}

class CaptureController {
  GlobalKey? _globalKey;

  setGlobalKey(GlobalKey globalKey) {
    _globalKey = globalKey;
  }

  Future<String> capturePng() async {
    try {
      RenderRepaintBoundary? boundary = _globalKey!.currentContext!
          .findRenderObject() as RenderRepaintBoundary;
      var image = await boundary.toImage(pixelRatio: 3.0);
      ByteData? byteData = await image.toByteData(format: ImageByteFormat.png);
      Uint8List pngBytes = byteData!.buffer.asUint8List();
      String str = base64.encode(pngBytes);
      return str;
    } catch (e) {}
    return "";
  }
}