View difference between Paste ID: qcNMjA5H and dQDgFwSJ

 import 'dart:developer';
 import 'dart:io';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
 
 import 'package:qr_code_scanner/qr_code_scanner.dart';
 import 'dasboard.dart';
 import 'model/undangan.dart';
 import 'package:qrcode2/apiTamu.dart';
 
 class QRViewExample extends StatefulWidget {
   const QRViewExample({Key? key}) : super(key: key);
 
   @override
   State<StatefulWidget> createState() => _QRViewExampleState();
 }
 
 class _QRViewExampleState extends State<QRViewExample> {
   Barcode? result;
   QRViewController? controller;
   final GlobalKey qrKey = GlobalKey(debugLabel: 'QR');
 
   @override
   void reassemble() {
     super.reassemble();
     if (Platform.isAndroid) {
       controller?.pauseCamera();
     }
     controller?.resumeCamera();
   }
 
   @override
   Widget build(BuildContext context) {
     return Scaffold(
       body: Column(
         children: <Widget>[
           if (result == null)
-            FutureBuilder<Undangan?>(
+
-              future: ApiUndangan.cekUndangan(result!.code!),
+
-              builder:
+            const CircularProgressIndicator(),
-                  (BuildContext context, AsyncSnapshot<Undangan?> snapshot) {
+
-                if (snapshot.hasData) {
+
-                  return _profil(snapshot.data!);
+
-                } else if (snapshot.hasError) {
+
-                  print('Error snapshot');
+
-                  return Container(
+
-                    alignment: Alignment.center,
+
-                    margin: const EdgeInsets.only(top: 100),
+
-                    child: const Text(
+
-                      'data tidak di temukan',
+
-                      style: TextStyle(fontSize: 28, color: Colors.red),
+
-                    ),
+
-                  );
+
-                }
+
-                return const CircularProgressIndicator();
+
-              },
+
                       });
                     },
                     child: const Text('coba lagi'),
                   ),
                   Row(
                     mainAxisAlignment: MainAxisAlignment.center,
                     crossAxisAlignment: CrossAxisAlignment.center,
                     children: <Widget>[
                       Container(
                         margin: const EdgeInsets.all(8),
                         child: ElevatedButton(
                           onPressed: () async {
                             await controller?.toggleFlash();
                             setState(() {});
                           },
                           child: FutureBuilder(
                             future: controller?.getFlashStatus(),
                             builder: (context, snapshot) {
                               return Text('Flash: ${snapshot.data}');
                             },
                           ),
                         ),
                       ),
                       Container(
                         margin: const EdgeInsets.all(8),
                         child: ElevatedButton(
                           onPressed: () async {
                             await controller?.flipCamera();
                             setState(() {});
                           },
                           child: FutureBuilder(
                             future: controller?.getCameraInfo(),
                             builder: (context, snapshot) {
                               if (snapshot.data != null) {
                                 return Text(
                                     'Camera facing ${describeEnum(snapshot.data!)}');
                               } else {
                                 return const Text('loading');
                               }
                             },
                           ),
                         ),
                       ),
                     ],
                   ),
                   Row(
                     mainAxisAlignment: MainAxisAlignment.center,
                     crossAxisAlignment: CrossAxisAlignment.center,
                     children: <Widget>[
                       Container(
                         margin: const EdgeInsets.all(8),
                         child: ElevatedButton(
                           onPressed: () async {
                             await controller?.pauseCamera();
                           },
                           child: const Text(
                             'pause',
                             style: TextStyle(fontSize: 20),
                           ),
                         ),
                       ),
                       Container(
                         margin: const EdgeInsets.all(8),
                         child: ElevatedButton(
                           onPressed: () async {
                             await controller?.resumeCamera();
                           },
                           child: const Text('resume',
                               style: TextStyle(fontSize: 20)),
                         ),
                       ),
                     ],
                   ),
                 ],
               ),
             ),
           )
         ],
       ),
     );
   }
 
   Widget _buildQrView(BuildContext context) {
     // For this example we check how width or tall the device is and change the scanArea and overlay accordingly.
     var scanArea = (MediaQuery.of(context).size.width < 400 ||
             MediaQuery.of(context).size.height < 400)
         ? 400.0
         : 400.0;
     // To ensure the Scanner view is properly sizes after rotation
     // we need to listen for Flutter SizeChanged notification and update controller
     return QRView(
       key: qrKey,
       onQRViewCreated: _onQRViewCreated,
       overlay: QrScannerOverlayShape(
         borderColor: Colors.red,
         borderRadius: 10,
         borderLength: 30,
         borderWidth: 10,
         cutOutSize: scanArea,
       ),
       onPermissionSet: (ctrl, p) => _onPermissionSet(context, ctrl, p),
     );
   }
 
   void _onQRViewCreated(QRViewController controller) {
     setState(() {
       this.controller = controller;
     });
     controller.scannedDataStream.listen((scanData) {
       setState(() {
         result = scanData;
       });
       _cekUndangan(scanData.code!);
     });
   }
 
   _cekUndangan(String code) async {
     final undangan = await ApiUndangan.cekUndangan(code);
 
     if (undangan != null) {
       final undanganProvider = Provider.of<UndanganProvider>(context);
-  Widget _profil(Undangan undangan) {
+      undanganProvider.undangan = undangan;
-    return Container(
+
-      padding: const EdgeInsets.fromLTRB(5, 5, 5, 5),
+      Navigator.push(context, MaterialPageRoute(builder: (_) => Dasboard()));
-      margin: const EdgeInsets.fromLTRB(10, 50, 10, 50),
+    } else {
-      color: Colors.blue.withOpacity(9),
+
-      child: Column(
+        result = null;
-        children: [
+
-          Text(
+
-            undangan.id,
+
-            style: const TextStyle(
+
-                fontWeight: FontWeight.bold, fontSize: 22, color: Colors.white),
+
-          ),
+
-          const SizedBox(height: 20),
+
-          Text('Terimakasih sudah hadir di ${undangan.title}'),
+
         const SnackBar(content: Text('no Permission')),
       );
     }
   }
 
   @override
   void dispose() {
     controller?.dispose();
     super.dispose();
   }
 }