chore: move confirm exit logic to TaskQueueViewModel

src/MaaWpfGui/Helper/ApplicationExtensions.cs

@@ -0,0 +1,25 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+
+namespace MaaWpfGui.Helper
+{
+    internal static class ApplicationExtensions
+    {
+        public static bool IsShuttingDown(this Application application)
+        {
+            try
+            {
+                application.ShutdownMode = application.ShutdownMode;
+                return false;
+            }
+            catch
+            {
+                return true;
+            }
+        }
+    }
+}

src/MaaWpfGui/Helper/WindowHandle.cs

@@ -21,6 +21,11 @@ namespace MaaWpfGui.Helper
 
         public static implicit operator WindowHandle(Window w)
         {
+            if (w == null)
+            {
+                return None;
+            }
+
             var interop = new WindowInteropHelper(w);
             return new WindowHandle { _handle = interop.Handle };
         }

src/MaaWpfGui/Services/Managers/IMainWindowManager.cs

@@ -46,5 +46,11 @@ namespace MaaWpfGui.Services.Managers
         /// </summary>
         /// <param name="shouldMinimizeToTaskbar">Whether to minimize to taskbar.</param>
         void SetMinimizeToTaskbar(bool shouldMinimizeToTaskbar);
+
+        /// <summary>
+        /// Get the main window if it is visible.
+        /// </summary>
+        /// <returns>The <see cref="Window"/> if it is visible, or <see cref="null"/>. </returns>
+        Window GetWindowIfVisible();
     }
 }

src/MaaWpfGui/Services/Managers/MainWindowManager.cs

@@ -108,5 +108,25 @@ namespace MaaWpfGui.Services.Managers
                 MainWindow.Visibility = Visibility.Hidden;
             }
         }
+
+        public virtual Window GetWindowIfVisible()
+        {
+            if (MainWindow == null)
+            {
+                return null;
+            }
+
+            if (MainWindow.WindowState == WindowState.Minimized)
+            {
+                return null;
+            }
+
+            if (MainWindow.Visibility != Visibility.Visible)
+            {
+                return null;
+            }
+
+            return MainWindow;
+        }
     }
 }

src/MaaWpfGui/Services/TrayIcon.cs

@@ -93,6 +93,15 @@ namespace MaaWpfGui.Services
 
         private void App_exit(object sender, EventArgs e)
         {
+            if (Instances.TaskQueueViewModel.Running)
+            {
+                Instances.MainWindowManager.Show();
+                if (!Instances.TaskQueueViewModel.ConfirmExit())
+                {
+                    return;
+                }
+            }
+
             System.Windows.Application.Current.Shutdown();
         }
 

src/MaaWpfGui/ViewModels/UI/RootViewModel.cs

@@ -85,17 +85,5 @@ namespace MaaWpfGui.ViewModels.UI
         {
             Application.Current.Shutdown();
         }
-
-        public void CloseWindowCommand(CancelEventArgs args)
-        {
-            if (Instances.TaskQueueViewModel.Running)
-            {
-                var result = MessageBoxHelper.ShowNative(Window.GetWindow(View), LocalizationHelper.GetString("ConfirmExitText"), LocalizationHelper.GetString("ConfirmExitTitle"), "MAA", MessageBoxButton.YesNo, MessageBoxImage.Question, MessageBoxResult.No);
-                if (result != MessageBoxResult.Yes)
-                {
-                    args.Cancel = true;
-                }
-            }
-        }
     }
 }

src/MaaWpfGui/ViewModels/UI/TaskQueueViewModel.cs

@@ -154,6 +154,33 @@ namespace MaaWpfGui.ViewModels.UI
 
         private readonly DispatcherTimer _timer = new DispatcherTimer();
 
+        public bool ConfirmExit()
+        {
+            if (Application.Current.IsShuttingDown())
+            {
+                // allow close if application is shutting down
+                return true;
+            }
+
+            if (!Running)
+            {
+                // no need to confirm if no running task
+                return true;
+            }
+
+            var window = Instances.MainWindowManager.GetWindowIfVisible();
+            var result = MessageBoxHelper.ShowNative(window, LocalizationHelper.GetString("ConfirmExitText"), LocalizationHelper.GetString("ConfirmExitTitle"), "MAA", MessageBoxButton.YesNo, MessageBoxImage.Information, MessageBoxResult.No);
+            return result == MessageBoxResult.Yes;
+        }
+
+#pragma warning disable CS0672 // Member overrides obsolete member
+        // WHY OBSOLETED?
+        protected override bool CanClose()
+#pragma warning restore CS0672 // Member overrides obsolete member
+        {
+            return ConfirmExit();
+        }
+
         private void InitTimer()
         {
             _timer.Interval = TimeSpan.FromSeconds(50);

src/MaaWpfGui/Views/UI/RootView.xaml

@@ -17,11 +17,6 @@
     d:DataContext="{d:DesignInstance {x:Type ui:RootViewModel}}"
     Icon="../../newlogo.ico"
     mc:Ignorable="d">
-    <hc:Interaction.Triggers>
-        <hc:EventTrigger EventName="Closing">
-            <hc:EventToCommand Command="{s:Action CloseWindowCommand}" PassEventArgsToCommand="True" />
-        </hc:EventTrigger>
-    </hc:Interaction.Triggers>
 
     <DockPanel>
         <TabControl