MouseEventArgs cleanup

Terminal.Gui/Application/Application.Mouse.cs

@@ -255,17 +255,17 @@ public static partial class Application // Mouse handling
     }
 
     /// <summary>
-    /// Raised when a mouse event occurs. Can be cancelled by setting <see cref="Terminal.Gui.MouseEventArgs.Handled"/> to <see langword="true"/>.
+    /// Raised when a mouse event occurs. Can be cancelled by setting <see cref="MouseEventArgs.Handled"/> to <see langword="true"/>.
     /// </summary>
     /// <remarks>
     ///     <para>
-    ///         <see cref="Terminal.Gui.MouseEventArgs.ScreenPosition"/> coordinates are screen-relative.
+    ///         <see cref="MouseEventArgs.ScreenPosition"/> coordinates are screen-relative.
     ///     </para>
     ///     <para>
-    ///         <see cref="Terminal.Gui.MouseEventArgs.View"/> will be the deepest view under the under the mouse.
+    ///         <see cref="MouseEventArgs.View"/> will be the deepest view under the under the mouse.
     ///     </para>
     ///     <para>
-    ///         <see cref="Terminal.Gui.MouseEventArgs.Position"/> coordinates are view-relative.
+    ///         <see cref="MouseEventArgs.Position"/> coordinates are view-relative. Only valid if <see cref="MouseEventArgs.View"/> is set.
     ///     </para>
     ///     <para>
     ///         Use this evento to handle mouse events at the application level, before View-specific handling.

Terminal.Gui/Input/MouseEventArgs.cs

@@ -1,4 +1,5 @@
-using System.ComponentModel;
+#nullable enable
+using System.ComponentModel;
 
 namespace Terminal.Gui;
 
@@ -20,12 +21,12 @@ public class MouseEventArgs : HandledEventArgs
     public Point ScreenPosition { get; set; }
 
     /// <summary>The deepest View who's <see cref="View.Frame"/> contains <see cref="ScreenPosition"/>.</summary>
-    public View View { get; set; }
+    public View? View { get; set; }
 
     /// <summary>The position of the mouse in <see cref="View"/>'s Viewport-relative coordinates. Only valid if <see cref="View"/> is set.</summary>
     public Point Position { get; set; }
 
     /// <summary>Returns a <see cref="T:System.String"/> that represents the current <see cref="Terminal.Gui.MouseEventArgs"/>.</summary>
     /// <returns>A <see cref="T:System.String"/> that represents the current <see cref="Terminal.Gui.MouseEventArgs"/>.</returns>
-    public override string ToString () { return $"({ScreenPosition}):{Flags}:{View.Id}:{Position}"; }
+    public override string ToString () { return $"({ScreenPosition}):{Flags}:{View?.Id}:{Position}"; }
 }

Terminal.Gui/Views/TabMouseEventArgs.cs

@@ -13,7 +13,7 @@ public class TabMouseEventArgs : EventArgs
     }
 
     /// <summary>
-    ///     Gets the actual mouse event.  Use <see cref="Terminal.Gui.MouseEventArgs.Handled"/> to cancel this event and perform custom
+    ///     Gets the actual mouse event.  Use <see cref="MouseEventArgs.Handled"/> to cancel this event and perform custom
     ///     behavior (e.g. show a context menu).
     /// </summary>
     public MouseEventArgs MouseEvent { get; }

docfx/docs/migratingfromv1.md

@@ -196,7 +196,7 @@ In v1, the `Command` enum had duplicate entries and inconsistent naming. In v2 i
 
 The API for mouse input is now internally consistent and easier to use.
 
-* The @Terminal.Gui.MouseEvent class replaces `MouseEventEventArgs`.
+* The @Terminal.Gui.MouseEventArgs class replaces `MouseEventEventArgs`.
 * More granular APIs are provided to ease handling specific mouse actions. See [Mouse API](mouse.md).
 * Views can use the @Terminal.Gui.View.Highlight event to have the view be visibly highlighted on various mouse events.
 * Views can set `View.WantContinousButtonPresses = true` to have their @Terminal.Gui.Command.Accept command be invoked repeatedly as the user holds a mouse button down on the view.
@@ -213,7 +213,7 @@ The API for mouse input is now internally consistent and easier to use.
 
 ```diff
 - Application.RootMouseEvent(KeyEvent arg)
-+ Application.MouseEvent(object? sender, MouseEvent mouseEvent)
++ Application.MouseEvent(object? sender, MouseEventArgs mouseEvent)
 ```
 
 ## Navigation - `Cursor`, `Focus`, `TabStop` etc...