From dbd7aad30d93d73dee437e310d9ae28ebfd84cc7 Mon Sep 17 00:00:00 2001
From: administrator <info@dimedtec.de>
Date: Sun, 17 May 2026 17:53:16 +0200
Subject: [PATCH] EPG: Scroll-Position nach Erinnerung-Rebuild beibehalten

---
 MainWindow.xaml.cs | 24 ++++++++++++++++++------
 1 file changed, 18 insertions(+), 6 deletions(-)

diff --git a/MainWindow.xaml.cs b/MainWindow.xaml.cs
index 3a3d2e1..55aa5fe 100644
--- a/MainWindow.xaml.cs
+++ b/MainWindow.xaml.cs
@@ -823,6 +823,8 @@ public partial class MainWindow : Window
     private const int EpgTotalHours = 8;
 
     private DateTime _epgStartTime;
+    private double _epgScrollH = 0;
+    private double _epgScrollV = 0;
 
     private async Task ShowEpgOverlayAsync()
     {
@@ -844,7 +846,7 @@ public partial class MainWindow : Window
         }
 
         TxtEpgOverlayStatus.Text = "Baue Programm\u2026";
-        await BuildEpgGridAsync();
+        await BuildEpgGridAsync(resetScroll: true);
     }
 
     private void HideEpgOverlay()
@@ -853,9 +855,11 @@ public partial class MainWindow : Window
         EpgCanvas.Children.Clear();
     }
 
-    private async Task BuildEpgGridAsync()
+
+    private async Task BuildEpgGridAsync(bool resetScroll = false)
     {
-        // Erst nach Background-Priority clearen damit laufende Event-Handler fertig sind
+        _epgScrollH = EpgScrollViewer.HorizontalOffset;
+        _epgScrollV = EpgScrollViewer.VerticalOffset;
         await Dispatcher.InvokeAsync(() => EpgCanvas.Children.Clear(),
             System.Windows.Threading.DispatcherPriority.Background);
         EpgCanvas.Children.Clear();
@@ -887,8 +891,16 @@ public partial class MainWindow : Window
         }
 
         TxtEpgOverlayStatus.Text = $"{channels.Count} Sender \u00b7 {EpgTotalHours} Stunden";
-        EpgScrollViewer.ScrollToHorizontalOffset(0);
-        EpgScrollViewer.ScrollToVerticalOffset(0);
+        if (resetScroll)
+        {
+            EpgScrollViewer.ScrollToHorizontalOffset(0);
+            EpgScrollViewer.ScrollToVerticalOffset(0);
+        }
+        else
+        {
+            EpgScrollViewer.ScrollToHorizontalOffset(_epgScrollH);
+            EpgScrollViewer.ScrollToVerticalOffset(_epgScrollV);
+        }
     }
 
     private void BuildEpgHeader(double totalMinutes, double contentWidth, double contentHeight)
@@ -1104,7 +1116,7 @@ public partial class MainWindow : Window
                     });
                 }
                 // Verzoegert neu bauen damit Event-Handler sauber abgeschlossen ist
-                Dispatcher.BeginInvoke(async () => await BuildEpgGridAsync(),
+                Dispatcher.BeginInvoke(async () => await BuildEpgGridAsync(resetScroll: false),
                     System.Windows.Threading.DispatcherPriority.Background);
             };
             menu.Items.Add(remind);