Recalculate bycicle postion on focus lost of address fields

Pages/Fundvelo/CaritasServiceFundVeloFoundKeyDataPage.razor

                     <div class="mat-layout-grid-inner">
                         <div class="mat-layout-grid-cell mat-layout-grid-cell-span-4-phone mat-layout-grid-cell-span-4-tablet mat-layout-grid-cell-span-12-desktop">
                             <MatStringField Class="w-100 form-check-label" Label="@getAddressLbl()" Outlined="true" Required="true" Type="text" @bind-Value="@bicycleGeoPosition.Address"
-                             OnKeyDown="@InputCursorHandler.OnKeyDownHandlerAsync" maxlength="50"></MatStringField>
+                             OnKeyDown="@InputCursorHandler.OnKeyDownHandlerAsync" maxlength="50"
+                             OnFocusOut="@TransformAdressToDeviceMapLocation"></MatStringField>
                         </div>
 
                         @if (OnlineStatusProvider.Online) {
                             <div class="mat-layout-grid-cell mat-layout-grid-cell-span-4-phone mat-layout-grid-cell-span-4-tablet mat-layout-grid-cell-span-12-desktop">
                                 <MatStringField Class="w-100 form-check-label" Label="@getZipCityLbl()" Outlined="true" Required="true" type="text" @bind-Value="@bicycleGeoPosition.DisplayCity"
-                                                OnKeyDown="@InputCursorHandler.OnKeyDownHandlerAsync"></MatStringField>
+                                OnKeyDown="@InputCursorHandler.OnKeyDownHandlerAsync"
+                                OnFocusOut="@TransformAdressToDeviceMapLocation"></MatStringField>
                             </div>
                         } else {
                             <div class="mat-layout-grid-cell mat-layout-grid-cell-span-4-phone mat-layout-grid-cell-span-4-tablet mat-layout-grid-cell-span-4-desktop">
         await GetBicycleTypes();
         await GetBrands();
         await GetZipCities();
-        refreshGUIFromDto();
+        RefreshGUIFromDto();
         OnlineStatusProvider.AddOnlineStatusChangeCallBack(OnOnlineStatusChanged);
         StateHasChanged();
     }
 
 
     private void Next() {
-        updateDtoFromGUI();
+        UpdateDtoFromGUI();
         PageHistoryManager.AddPageToHistory(NavigationManager.Uri);
         try {
             Validator.ValidateFoundReportKeyData(ReportDataProvider.GetFoundReport());
         }
     }
 
-    private async void refreshGUIFromDto() {
+    private async void RefreshGUIFromDto() {
         FoundReport report = ReportDataProvider.GetFoundReport();
         bicycleGeoPosition.Address = report.GeographicInfo.Address;
         bicycleGeoPosition.Zip = report.GeographicInfo.Postcode;
         StateHasChanged();
     }
 
-    private void updateDtoFromGUI() {
+    private void UpdateDtoFromGUI() {
         FoundReport report = ReportDataProvider.GetFoundReport();
         report.GeographicInfo.Address = bicycleGeoPosition.Address;
         if (OnlineStatusProvider.Online) {
         report.Bemerkung = remark;
         report.AbholadresseIstKontakt = !abholadresseIsNotContact;
     }
+
+
+    private async void TransformAdressToDeviceMapLocation() {
+        bicycleGeoPosition.DisplayCity = bicycleGeoPosition.DisplayCity; // Hack, force a decode of zip and city
+        await ShowBicycleGeoLocation(true);
+        StateHasChanged();
+    }
 }

Pages/Fundvelo/CaritasServiceFundVeloFoundKeyDataPage.razor.cs

         protected async Task InitializeBicycleMapPosition() {
             CreateBicycleMarkerOptions();
             await AddEventsToMap();
-            await ShowBicycleGeoLocation();
+            await ShowBicycleGeoLocation(false);
         }
 
         protected async Task<string> GetFormattedAddressZipAndTown(ReportDataProvider ReportDataProvider) {
             return geoPosition;
         }
 
-        private async Task ShowBicycleGeoLocation() {
-            if (this.bicycleGeoPosition.Latitude != 0 && this.bicycleGeoPosition.Longitude != 0) {
+        protected async Task ShowBicycleGeoLocation(bool forceRecalc) {
+            if (this.bicycleGeoPosition.Latitude != 0 && this.bicycleGeoPosition.Longitude != 0 && !forceRecalc) {
                 LatLng geoPosition = new(this.bicycleGeoPosition.Latitude, this.bicycleGeoPosition.Longitude);
                 await this.mapRef.SetZoom(16);
                 await this.mapRef.SetView(geoPosition);

Shared/Models/Fundvelo/OSM/BicycleGeoPosition.cs

                 } else if (tokens.Length == 2) {
                     Zip = tokens[0];
                     City = tokens[1];
+                } else {
+                    Zip = null;
+                    City = null;
                 }
             }
         }