Added properties only to standardize the implementation of the BarcodeScanner class

Author: massmarz

lib/screens/unsupported.dart

@@ -9,6 +9,10 @@ class BarcodeScanner extends StatelessWidget {
   final Function(String) onScanned;
   final String? appBarTitle;
   final bool? centerTitle;
+    /// Properties only added to standardize the implementation of the BarcodeScanner class
+  final int scanWidth;
+  final int scanHeight;
+
   const BarcodeScanner(
       {Key? key,
       this.lineColor = "#ff6666",
@@ -17,7 +21,9 @@ class BarcodeScanner extends StatelessWidget {
       this.scanType = ScanType.barcode,
       required this.onScanned,
       this.appBarTitle,
-      this.centerTitle})
+      this.centerTitle,
+      this.scanWidth = 0,
+      this.scanHeight= 0})
       : super(key: key);
 
   @override