Better rotation for image FileViewer

lib/widget/fileViewer.dart

@@ -1,4 +1,5 @@
 import 'dart:io';
+import 'dart:math';
 
 import 'package:better_open_file/better_open_file.dart';
 import 'package:flutter/material.dart';
@@ -8,54 +9,72 @@ import 'package:syncfusion_flutter_pdfviewer/pdfviewer.dart';
 import 'confirmDialog.dart';
 import 'placeholderView.dart';
 
-class FileViewer extends StatelessWidget {
+class FileViewer extends StatefulWidget {
   final String path;
   final bool openExternal;
   final bool allowExternal;
   const FileViewer({super.key, required this.path, this.openExternal = false, this.allowExternal = true});
 
+  @override
+  State<FileViewer> createState() => _FileViewerState();
+}
+
+class _FileViewerState extends State<FileViewer> {
+  PhotoViewController photoViewController = PhotoViewController();
 
   @override
   Widget build(BuildContext context) {
-    AppBar appbar = AppBar(
+    AppBar appbar({List actions = const []}) {
-      title: Text(path.split("/").last),
+      return AppBar(
+        title: Text(widget.path.split("/").last),
         actions: [
           Visibility(
-          visible: allowExternal,
+            visible: widget.allowExternal,
             child: IconButton(onPressed: () => ConfirmDialog(
               title: "Extern öffnen",
               content: "Möchtest du die Datei mit dem Systemdialog öffnen?",
-            onConfirm: () => Navigator.of(context).push(MaterialPageRoute(builder: (context) => FileViewer(path: path, openExternal: true))),
+              onConfirm: () => Navigator.of(context).push(MaterialPageRoute(builder: (context) => FileViewer(path: widget.path, openExternal: true))),
               confirmButton: "Öffnen",
             ).asDialog(context), icon: const Icon(Icons.open_in_new)),
-        )
+          ),
+          ...actions
         ],
       );
-    switch(openExternal ? "" : path.split(".").last) {
+    }
+
+    switch(widget.openExternal ? "" : widget.path.split(".").last) {
       case "png":
       case "jpg":
       case "jpeg":
         return Scaffold(
-            appBar: appbar,
+            appBar: appbar(
+                actions: [
+                  IconButton(onPressed: () {
+                    setState(() {
+                      photoViewController.rotation += pi/2;
+                    });
+                  }, icon: const Icon(Icons.rotate_right)),
+                ]
+            ),
             backgroundColor: Colors.white,
             body: PhotoView(
-              imageProvider: Image.file(File(path)).image,
+              controller: photoViewController,
+              imageProvider: Image.file(File(widget.path)).image,
               backgroundDecoration: BoxDecoration(color: Theme.of(context).colorScheme.surface),
-              enableRotation: true,
             )
         );
 
 
       case "pdf":
         return Scaffold(
-          appBar: appbar,
+          appBar: appbar(),
           body: SfPdfViewer.file(
-            File(path),
+            File(widget.path),
           ),
         );
 
       default:
-        OpenFile.open(path).then((result) {
+        OpenFile.open(widget.path).then((result) {
           Navigator.of(context).pop();
           if(result.type != ResultType.done) {
             showDialog(context: context, builder: (context) {