chore: nullable sender

Author: emako

src/Wpf.Ui.Violeta/Controls/ExceptionReport/ExceptionReport.cs

@@ -21,7 +21,7 @@ public static void HandleOnUnhandledException(this Application app)
         app.DispatcherUnhandledException += OnApplicationUnhandledException;
     }
 
-    private static void OnApplicationUnhandledException(object sender, DispatcherUnhandledExceptionEventArgs e)
+    private static void OnApplicationUnhandledException(object? sender, DispatcherUnhandledExceptionEventArgs e)
     {
         e.Handled = true;
 

src/Wpf.Ui.Violeta/Controls/PersonPicture/PersonPicture.cs

@@ -404,7 +404,7 @@ void OnDisplayNameChanged(DependencyPropertyChangedEventArgs args)
     }
 
     // Event handlers
-    void OnSizeChanged(object sender, SizeChangedEventArgs args)
+    void OnSizeChanged(object? sender, SizeChangedEventArgs args)
     {
         {
             bool widthChanged = args.NewSize.Width != args.PreviousSize.Width;
@@ -461,7 +461,7 @@ void OnSizeChanged(object sender, SizeChangedEventArgs args)
         }
     }
 
-    void OnUnloaded(object sender, RoutedEventArgs e)
+    void OnUnloaded(object? sender, RoutedEventArgs e)
     {
         //if (auto profilePictureReadAsync = m_profilePictureReadAsync.get())
         //{

src/Wpf.Ui.Violeta/Controls/Primitives/PopupPositioner.cs

@@ -85,7 +85,7 @@ public void Dispose()
 
     internal bool DropOpposite => Delegates.GetDropOpposite!(_popup);
 
-    private void OnWindowResize(object sender, AutoResizedEventArgs e)
+    private void OnWindowResize(object? sender, AutoResizedEventArgs e)
     {
         if (_positionInfo == null)
         {

src/Wpf.Ui.Violeta/Controls/Primitives/ThemeShadowChrome.cs

@@ -348,14 +348,14 @@ private void UpdateShadow2()
         }
     }
 
-    private void OnSizeChanged(object sender, SizeChangedEventArgs e)
+    private void OnSizeChanged(object? sender, SizeChangedEventArgs e)
     {
         ClearMarginAdjustment();
         UpdateLayout();
         AdjustMargin();
     }
 
-    private void OnLoaded(object sender, RoutedEventArgs e)
+    private void OnLoaded(object? sender, RoutedEventArgs e)
     {
         if (IsVisible)
         {

src/Wpf.Ui.Violeta/Controls/Splash/Splash.cs

@@ -108,7 +108,7 @@ public static void CloseOnLoaded(Window? owner = null, int? minimumMilliseconds
 
         owner.Loaded += OnLoaded;
 
-        async void OnLoaded(object sender, RoutedEventArgs e)
+        async void OnLoaded(object? sender, RoutedEventArgs e)
         {
             owner.Loaded -= OnLoaded;
 

src/Wpf.Ui.Violeta/Controls/Splash/SplashWindow.xaml.cs

@@ -62,15 +62,15 @@ protected bool SetProperty<T>(ref T field, T newValue, [CallerMemberName] string
         return true;
     }
 
-    private void Start_Completed(object sender, EventArgs e)
+    private void Start_Completed(object? sender, EventArgs e)
     {
         if (AutoEnd)
         {
             StartEnd();
         }
     }
 
-    private void End_Completed(object sender, EventArgs e)
+    private void End_Completed(object? sender, EventArgs e)
     {
         Shutdown();
     }