Merge pull request #559 from navaronbracke/media_query_fix

fix: Use MediaQuery.sizeOf(context) instead of topmost LayoutBuilder

@@ -232,8 +232,8 @@ class _MobileScannerState extends State<MobileScanner>
 
   @override
   Widget build(BuildContext context) {
-    return LayoutBuilder(
-      builder: (context, constraints) {
+    final Size size = MediaQuery.sizeOf(context);
+
     return ValueListenableBuilder<MobileScannerArguments?>(
       valueListenable: _controller.startArguments,
       builder: (context, value, child) {
@@ -246,7 +246,7 @@ class _MobileScannerState extends State<MobileScanner>
             widget.fit,
             widget.scanWindow!,
             value.size,
-                Size(constraints.maxWidth, constraints.maxHeight),
+            size,
           );
 
           _controller.updateScanWindow(scanWindow);
@@ -259,9 +259,8 @@ class _MobileScannerState extends State<MobileScanner>
                 size: constraints.biggest,
                 child: FittedBox(
                   fit: widget.fit,
-                      child: SizedBox(
-                        width: value.size.width,
-                        height: value.size.height,
+                  child: SizedBox.fromSize(
+                    size: value.size,
                     child: kIsWeb
                         ? HtmlElementView(viewType: value.webId!)
                         : Texture(textureId: value.textureId!),
@@ -273,8 +272,6 @@ class _MobileScannerState extends State<MobileScanner>
         );
       },
     );
-      },
-    );
   }
 
   @override