Verschickte Bilder werden jetzt korrekt rotiert angezeigt.

Die Synchronisation der Kontaktliste nach dem Senden einer Nachricht wird korrekt aktualisiert.

ChatController/ChatMainControl.xaml.cs

@@ -642,6 +642,8 @@ namespace ChatController
 
                 Chatbox.Text = string.Empty;
 
+                Thread.Sleep(500);
+
                 DoSynchro();
             }
         }

ChatController/HauptKlassen/Chat.cs

@@ -919,16 +919,16 @@ namespace ChatController.HauptKlassen
                 var windowMaxWidth = imageWidth;
                 var windowMaxHeight = imageHeight;
 
-                if (windowMaxWidth > primaryScreenWidth2 || windowMaxHeight > primaryScreenHeight2)
+                if(windowMaxWidth > .8 * primaryScreenWidth2 || windowMaxHeight > .8 * primaryScreenHeight2)
                 {
-                    if (primaryScreenWidth2 > primaryScreenHeight2)
+                    if(primaryScreenWidth2 > primaryScreenHeight2)
                     {
-                        windowMaxHeight = (int)(.9 * primaryScreenHeight2);
+                        windowMaxHeight = (int)(.8 * primaryScreenHeight2);
                         windowMaxWidth = (int)(windowMaxHeight * imageAspectRatio);
                     }
                     else
                     {
-                        windowMaxWidth = (int)(.9 * primaryScreenWidth2);
+                        windowMaxWidth = (int)(.8 * primaryScreenWidth2);
                         windowMaxHeight = (int)(windowMaxWidth * imageAspectRatio);
                     }
                 }
@@ -978,7 +978,7 @@ namespace ChatController.HauptKlassen
 
         public void ShowPicture(string originalImage, long groupId, Action<ImageSource, string> downloadCompletedCallback)
         {
-            if(originalImage == null)
+            if(originalImage is null)
             {
                 return;
             }

ChatController/Utilities/Utils.cs

@@ -74,27 +74,53 @@ namespace ChatController.Utilities
             {
                 ResponseWriter = stream =>
                 {
-                    var bitmap = new BitmapImage();
+                    var rotation = Rotation.Rotate0;
 
-                    var localStream = new MemoryStream();
+                    using(var image = Image.FromStream(stream))
+                    {
+                        if(image.PropertyIdList.Contains(0x112))
+                        {
+                            rotation = GetRotationFromExifTag(image.GetPropertyItem(0x112).Value[0]);
+                        }
 
-                    stream.CopyTo(localStream);
+                        var bitmap = new BitmapImage();
 
-                    localStream.Position = 0;
+                        var localStream = new MemoryStream();
 
-                    bitmap.BeginInit();
+                        image.Save(localStream, image.RawFormat);
-                    bitmap.StreamSource = localStream;
-                    bitmap.EndInit();
-                    bitmap.Freeze();
 
-                    callback?.Invoke(bitmap);
+                        localStream.Position = 0;
+
+                        bitmap.BeginInit();
+                        bitmap.StreamSource = localStream;
+                        bitmap.Rotation = rotation;
+                        bitmap.EndInit();
+                        bitmap.Freeze();
+
+                        callback?.Invoke(bitmap);
+                    }
                 }
             };
 
             request.AddHeader(Constants.Token, AuthToken);
             request.AddHeader(Constants.CustomerId, Tenant);
 
-            client.ExecuteAsync(request, response => { /*Das übernimmt der ResponseWriter von oben*/ });
+            client.ExecuteAsync(request, null);
+        }
+
+        private static Rotation GetRotationFromExifTag(int value)
+        {
+            switch (value)
+            {
+                case 6:
+                    return Rotation.Rotate90;
+                case 8:
+                    return Rotation.Rotate270;
+                case 3:
+                    return Rotation.Rotate180;
+                default:
+                    return Rotation.Rotate0;
+            }
         }
 
         public static void DownloadImageAsync(string uri, string key, CacheCategory cacheCategory, Action<ImageSource> callback)