import 'package:flutter/material.dart';
import 'package:qr_code_scanner/qr_code_scanner.dart';
import 'dart:io';

import 'package:qr_flutter/qr_flutter.dart';
class QrWidget extends StatefulWidget {
  const QrWidget({Key? key}) : super(key: key);

  @override
  State<QrWidget> createState() => _QrWidgetState();
}

class _QrWidgetState extends State<QrWidget> {
  final GlobalKey qrKey = GlobalKey(debugLabel: 'QR');
  Barcode? result;
  QRViewController? controller;

  @override
  initState(){

  }

  @override
  void reassemble() {
    super.reassemble();
    // if (Platform.isAndroid) {
    //   controller!.pauseCamera();
    // } else if (Platform.isIOS) {
    //   controller!.resumeCamera();
    // }
  }


  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('QR'),
        centerTitle: true,
        elevation: 0.0,
      ),
      body: Column(
        children: <Widget>[
          Row(
            mainAxisAlignment: MainAxisAlignment.center,
            children: [
              Container(
                width: 300,
                height: 300,
                child: QRView(
                  key: qrKey,
                  onQRViewCreated: _onQRViewCreated,
                ),
              ),
              Container(
                width: 300,
                height: 300,
                child: QrImage(
                  data: "1234567890",
                  version: QrVersions.auto,
                  size: 200.0,
                ),
              ),
            ],
          ),
          Expanded(
            flex: 1,
            child: Center(
              child: (result != null)
                  ? Text(
                  'Barcode Type:Data: ${result!.code}')
                  : Text('Scan a code'),
            ),
          )
        ],
      ),
    );
  }

  void _onQRViewCreated(QRViewController controller) {
    this.controller = controller;
    controller.scannedDataStream.listen((scanData) {
      setState(() {
        result = scanData;
        print(result);
      });
    });
    controller.resumeCamera();
  }

  @override
  void dispose() {
    controller?.dispose();
    super.dispose();
  }
}