feat.PLONDS系统开发

LanDesktopPLONDS.installer/Views/MainWindow.axaml.cs

@@ -1,6 +1,8 @@
+using Avalonia;
 using Avalonia.Controls;
 using Avalonia.Input;
 using Avalonia.Interactivity;
+using Avalonia.Layout;
 using Avalonia.Platform.Storage;
 using LanDesktopPLONDS.Installer.ViewModels;
 
@@ -22,6 +24,80 @@ public partial class MainWindow : Window
         }
     }
 
+    /// <summary>
+    /// Task 5: 安装进行中阻止关闭窗口，弹出中文确认对话框。
+    /// </summary>
+    protected override async void OnClosing(WindowClosingEventArgs e)
+    {
+        if (DataContext is not MainWindowViewModel { IsInstalling: true })
+        {
+            base.OnClosing(e);
+            return;
+        }
+
+        e.Cancel = true;
+        var confirmed = await ShowCloseConfirmDialogAsync();
+        if (confirmed)
+        {
+            if (DataContext is MainWindowViewModel vm)
+            {
+                vm.CancelInstallCommand.Execute(null);
+            }
+
+            Close();
+        }
+    }
+
+    private async Task<bool> ShowCloseConfirmDialogAsync()
+    {
+        var tcs = new TaskCompletionSource<bool>();
+
+        var yesButton = new Button { Content = "确定退出", MinWidth = 100 };
+        yesButton.Classes.Add("primary-command");
+        yesButton.Click += (_, _) => tcs.TrySetResult(true);
+
+        var noButton = new Button { Content = "继续安装", MinWidth = 100 };
+        noButton.Classes.Add("secondary-command");
+        noButton.Click += (_, _) => tcs.TrySetResult(false);
+
+        var buttonPanel = new StackPanel
+        {
+            Orientation = Orientation.Horizontal,
+            HorizontalAlignment = HorizontalAlignment.Right,
+            Spacing = 8,
+            Margin = new Thickness(0, 16, 0, 0),
+        };
+        buttonPanel.Children.Add(yesButton);
+        buttonPanel.Children.Add(noButton);
+
+        DockPanel.SetDock(buttonPanel, Dock.Bottom);
+
+        var panel = new DockPanel { Margin = new Thickness(24) };
+        panel.Children.Add(buttonPanel);
+        panel.Children.Add(new TextBlock
+        {
+            Text = "安装正在进行，确定要退出吗？",
+            VerticalAlignment = VerticalAlignment.Center,
+            FontSize = 15,
+        });
+
+        var dialog = new Window
+        {
+            Title = "确认退出",
+            Width = 400,
+            Height = 180,
+            WindowStartupLocation = WindowStartupLocation.CenterOwner,
+            CanResize = false,
+            WindowDecorations = WindowDecorations.BorderOnly,
+            Content = panel,
+        };
+
+        dialog.Closed += (_, _) => tcs.TrySetResult(false);
+
+        _ = dialog.ShowDialog(this);
+        return await tcs.Task;
+    }
+
     private async Task<string?> BrowseForFolderAsync(string currentPath)
     {
         IStorageFolder? startFolder = null;