From 3cb3e12c94315073cd507705ce37db8a7535dc38 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Elias=20M=C3=BCller?= <elias@elias-mueller.com>
Date: Thu, 6 Jul 2023 22:46:16 +0200
Subject: [PATCH] Better rotation for image FileViewer

---
 lib/widget/fileViewer.dart | 63 +++++++++++++++++++++++++-------------
 1 file changed, 41 insertions(+), 22 deletions(-)

diff --git a/lib/widget/fileViewer.dart b/lib/widget/fileViewer.dart
index 6812c94..07986e1 100644
--- a/lib/widget/fileViewer.dart
+++ b/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(
-      title: Text(path.split("/").last),
-      actions: [
-        Visibility(
-          visible: 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))),
-            confirmButton: "Öffnen",
-          ).asDialog(context), icon: const Icon(Icons.open_in_new)),
-        )
-      ],
-    );
-    switch(openExternal ? "" : path.split(".").last) {
+    AppBar appbar({List actions = const []}) {
+      return AppBar(
+        title: Text(widget.path.split("/").last),
+        actions: [
+          Visibility(
+            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: widget.path, openExternal: true))),
+              confirmButton: "Öffnen",
+            ).asDialog(context), icon: const Icon(Icons.open_in_new)),
+          ),
+          ...actions
+        ],
+      );
+    }
+
+    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) {