private void btnEdit_Click(object sender, RoutedEventArgs e)
        {
            if (CurrentConstructionSite == null)
            {
                MainWindow.WarningMessage = ((string)Application.Current.FindResource("Morate_odabrati_gradiliste_za_izmenuUzvičnik"));
                return;
            }

            ConstructionSite_List_AddEdit addEditForm = new ConstructionSite_List_AddEdit(CurrentConstructionSite, false);

            addEditForm.ConstructionSiteCreatedUpdated += new ConstructionSiteHandler(SyncData);
            FlyoutHelper.OpenFlyout(this, ((string)Application.Current.FindResource("Podaci_o_gradilistima")), 95, addEditForm);
        }
        private void btnAdd_Click(object sender, RoutedEventArgs e)
        {
            ConstructionSiteViewModel constructionSite = new ConstructionSiteViewModel();

            constructionSite.Identifier      = Guid.NewGuid();
            constructionSite.ContractStart   = DateTime.Now;
            constructionSite.ProContractDate = DateTime.Now;

            ConstructionSite_List_AddEdit addEditForm = new ConstructionSite_List_AddEdit(constructionSite, true);

            addEditForm.ConstructionSiteCreatedUpdated += new ConstructionSiteHandler(SyncData);
            FlyoutHelper.OpenFlyout(this, ((string)Application.Current.FindResource("Podaci_o_gradilistima")), 95, addEditForm);
        }