OverlayAktualisierung im frmMain

app/TaskFlow/frmMain.vb

@@ -1335,9 +1335,7 @@ Public Class frmMain
     End Sub
     Private Async Sub TimerRefresh_Tick(sender As System.Object, e As EventArgs) Handles TimerRefresh.Tick
         Try
-            If TimerRefresh.Enabled = False Then
+            If TimerRefresh.Enabled = False Then Exit Sub
-                Exit Sub
-            End If
             If bwBasicData.IsBusy Then
                 LOGGER.Info("backGroundWorker BasicData in Action - no Client-Sync")
                 bsiMessage.Caption = "bwBasicData is busy - no Refreshing"
@@ -1348,7 +1346,7 @@ Public Class frmMain
 
             TimerRefresh_running = True
 
-            ' Cancel Refresh if a Validator Form or an Admin Form is opened
+            ' Cancel Refresh if Validator/Admin Form is opened
             If Application.OpenForms().OfType(Of frmMassValidator).Any() Or
                 Application.OpenForms().OfType(Of frmValidator).Any() Or
                 Application.OpenForms().OfType(Of frmAdministration).Any() Or
@@ -1356,7 +1354,11 @@ Public Class frmMain
                 Exit Sub
             End If
 
-            'bsilastsync.Caption = $"{ClassAllgemeineFunktionen.GUI_LANGUAGE_INFO("CaptLastSync")}: " & Now.ToLongTimeString
+            ' ✅ Prüfung ob Fenster aktiv ist
+            Dim isWindowActive As Boolean = (Me.ContainsFocus OrElse Me Is Form.ActiveForm)
+
+            If isWindowActive Then
+                ' ====== FENSTER IST AKTIV → MIT Overlay ======
                 bsilastsync.Caption = String.Format(S.Letzte_Synchronisation___0_, Now.ToLongTimeString)
 
                 If GridControlWorkflows.Visible = True And FormOpenClose = False Then
@@ -1369,29 +1371,35 @@ Public Class frmMain
                 End If
 
                 Try
-                'bwSync.ReportProgress(10)
                     LoadNavBar()
-                'bwSync.ReportProgress(60)
                     Dim oStopWatch As New RefreshHelper.SW("Decide_Load")
-                Await Decide_Load(False)
+                    Await Decide_Load(False, ForceReload:=False, AllowOverlay:=True)  ' ✅ Overlay ERLAUBT
                     oStopWatch.Done()
-                'bwSync.ReportProgress(95)
 
-                If GridControlWorkflows.Visible = True And FormOpenClose = False Then RefreshHelper.LoadViewInfo()
+                    If GridControlWorkflows.Visible = True And FormOpenClose = False Then
+                        RefreshHelper.LoadViewInfo()
+                    End If
 
                     Handling_DEBUG_USER()
                 Catch ex As Exception
                     LOGGER.Error(ex)
                 End Try
+            Else
+                ' ====== FENSTER IST INAKTIV → OHNE Overlay ======
+                LOGGER.Debug("TimerRefresh: Silent background update (window not active)")
+
+                Try
+                    LoadNavBar()
+                    Await Decide_Load(False, ForceReload:=False, AllowOverlay:=False)  ' ✅ Overlay VERBOTEN
+                    ' KEIN RefreshHelper.LoadViewInfo() → verhindert UI-Flackern
+                Catch ex As Exception
+                    LOGGER.Error(ex)
+                End Try
+            End If
         Catch ex As Exception
             LOGGER.Error(ex)
         End Try
         TimerRefresh_running = False
-        'BarEditItem1.Visibility = DevExpress.XtraBars.BarItemVisibility.Always
-        '' call this method to start your asynchronous Task.
-        'bwSync.RunWorkerAsync()
-
-
     End Sub
 
     Private Sub NotifyIcon1_Click(sender As System.Object, e As EventArgs) Handles NotifyIcon1.Click
@@ -1400,10 +1408,14 @@ Public Class frmMain
     ' ========================================
     ' HAUPTLADEMETHODE - Koordiniert den gesamten Ladevorgang
     ' ========================================
-    Private Async Function Decide_Load(pIsFormLoad As Boolean, Optional ForceReload As Boolean = False) As Tasks.Task
+    Private Async Function Decide_Load(pIsFormLoad As Boolean, Optional ForceReload As Boolean = False, Optional AllowOverlay As Boolean = True) As Tasks.Task
         Dim oHandle As Object = Nothing
         Dim overlayStartedHere As Boolean = False
-        If Not _overlayActive Then
+
+        ' ✅ Overlay nur anzeigen, wenn explizit erlaubt UND Fenster aktiv ist
+        Dim shouldShowOverlay As Boolean = AllowOverlay AndAlso (Me.ContainsFocus OrElse Me Is Form.ActiveForm)
+
+        If shouldShowOverlay AndAlso Not _overlayActive Then
             oHandle = SplashScreenManager.ShowOverlayForm(Me)
             _overlayActive = True
             overlayStartedHere = True
@@ -1481,9 +1493,9 @@ Public Class frmMain
             LOGGER.Info("Unexpected error in Decide_load: " & ex.Message)
         Finally
             FRONTEND_ACTION = FA_NONE
-            If overlayStartedHere Then
+            If overlayStartedHere AndAlso _overlayActive Then
-                _overlayActive = False
                 SplashScreenManager.CloseOverlayForm(oHandle)
+                _overlayActive = False
             End If
             If refreshWasEnabled Then
                 TimerRefresh.Start()