- call the update of the TrainCarOprationsWebpage only 4 times per second

- transferred some code from Viewer.cs to TrainCarOperationsWebpage.cs

Author: sweiland-openrails

Source/RunActivity/Viewer3D/Viewer.cs

@@ -913,18 +913,9 @@ public void Update(RenderFrame frame, float elapsedRealTime)
 
             SwitchPanelModule.SendSwitchPanelIfChanged();
 
-            try
-            {
-                if ((PlayerTrain != null) && (TrainCarOperationsWebpage != null))
-                {
-                    TrainCarOperationsWebpage.handleReceiveAndSend();
-                }
-            }
-            catch (Exception error)
+            if (TrainCarOperationsWebpage != null)
             {
-                // some timing error causes an exception sometimes
-                // just silently ignore but log the exception
-                Trace.TraceWarning(error.ToString());
+                TrainCarOperationsWebpage.handleReceiveAndSend();
             }
         }
 

Source/RunActivity/Viewer3D/WebServices/TrainCarOperationsWebpage.cs

@@ -202,12 +202,29 @@ public async Task BroadcastEvent(OperationsSend operationsSend)
             }
         }
 
+        double LastPrepareRealTime;
         public void handleReceiveAndSend()
         {
-            if (Connections > 0)
+            if ((Viewer.PlayerTrain != null))
             {
-                handleReceive();
-                handleSend();
+                if (Connections > 0)
+                {
+                    if (Viewer.RealTime - LastPrepareRealTime >= 0.25)
+                    {
+                        LastPrepareRealTime = Viewer.RealTime;
+                        try
+                        {
+                            handleReceive();
+                            handleSend();
+                        }
+                        catch (Exception error)
+                        {
+                            // some timing error causes an exception sometimes
+                            // just silently ignore but log the exception
+                            Trace.TraceWarning(error.ToString());
+                        }
+                    }
+                }
             }
         }