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CRSim/ViewModels/Windows/Stations/Zibo/SecondaryScreenViewModel.cs

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+namespace CRSim.ViewModels.Zibo
+{
+    public class SecondaryScreenViewModel : ScreenViewModel
+    {
+        public ObservableCollection<TrainInfo> Screen { get; private set; } = [];
+        public SecondaryScreenViewModel(ITimeService timeService, ISettingsService settingsService)
+            : base(timeService, settingsService)
+        {
+            Text = $"开车前{settingsService.GetSettings().StopCheckInAdvanceDuration.TotalMinutes}分钟停止检票";
+            ItemsPerPage = 18;
+            PageCount = 1;
+            timeService.RefreshSecondsElapsed += RefreshDisplay;
+            Initialize();
+        }
+        private async void Initialize()
+        {
+            await WaitForDataLoadAsync();
+            RefreshDisplay(null,null);
+        }
+        private void RefreshDisplay(object? sender, EventArgs e)
+        {
+            Application.Current.Dispatcher.Invoke(() =>
+            {
+                int pageCount = (int)Math.Ceiling((double)TrainInfo.Count / (ItemsPerPage * PageCount));
+                Screen.Clear();
+                int startIndex = CurrentPageIndex * ItemsPerPage * PageCount;
+                var Items = TrainInfo.Skip(startIndex).Take(ItemsPerPage).ToList();
+                while (Items.Count < ItemsPerPage) // Fill up with new object() if not enough items
+                {
+                    Items.Add(new TrainInfo());
+                }
+                foreach (var item in Items)
+                {
+                    Screen.Add(item);
+                }
+                CurrentPageIndex = CurrentPageIndex + 1 >= Math.Min(_settings.MaxPages, pageCount) ? 0 : CurrentPageIndex + 1;
+            });
+        }
+    }
+}