Added InitialPressMouseButton to PointerReleasedEventArgs that returns the button that caused the PointerPressed event

MouseButton is now deprecated with error, since people need to decide which behavior they want

src/Avalonia.Controls.DataGrid/DataGridColumnHeader.cs

@@ -468,7 +468,7 @@ namespace Avalonia.Controls
 
         private void DataGridColumnHeader_PointerReleased(object sender, PointerReleasedEventArgs e)
         {
-            if (OwningColumn == null || e.Handled || !IsEnabled || e.MouseButton != MouseButton.Left)
+            if (OwningColumn == null || e.Handled || !IsEnabled || e.InitialPressMouseButton != MouseButton.Left)
             {
                 return;
             }

src/Avalonia.Controls/Button.cs

@@ -294,7 +294,7 @@ namespace Avalonia.Controls
         {
             base.OnPointerReleased(e);
 
-            if (IsPressed && e.MouseButton == MouseButton.Left)
+            if (IsPressed && e.InitialPressMouseButton == MouseButton.Left)
             {
                 IsPressed = false;
                 e.Handled = true;

src/Avalonia.Controls/Calendar/Calendar.cs

@@ -1565,7 +1565,7 @@ namespace Avalonia.Controls
         protected override void OnPointerReleased(PointerReleasedEventArgs e)
         {
             base.OnPointerReleased(e);
-            if (!HasFocusInternal && e.MouseButton == MouseButton.Left)
+            if (!HasFocusInternal && e.InitialPressMouseButton == MouseButton.Left)
             {
                 FocusManager.Instance.Focus(this);
             }

src/Avalonia.Controls/Calendar/CalendarButton.cs

@@ -173,7 +173,7 @@ namespace Avalonia.Controls.Primitives
         protected override void OnPointerReleased(PointerReleasedEventArgs e)
         {
             base.OnPointerReleased(e);
-            if (e.MouseButton == MouseButton.Left)
+            if (e.InitialPressMouseButton == MouseButton.Left)
                 CalendarLeftMouseButtonUp?.Invoke(this, e);
         }
     }

src/Avalonia.Controls/Calendar/CalendarDayButton.cs

@@ -231,7 +231,7 @@ namespace Avalonia.Controls.Primitives
         {
             base.OnPointerReleased(e);
 
-            if (e.MouseButton == MouseButton.Left)
+            if (e.InitialPressMouseButton == MouseButton.Left)
                 CalendarDayButtonMouseUp?.Invoke(this, e);
         }
     }

src/Avalonia.Controls/ContextMenu.cs

@@ -192,7 +192,7 @@ namespace Avalonia.Controls
                 e.Handled = true;
             }
 
-            if (e.MouseButton == MouseButton.Right)
+            if (e.InitialPressMouseButton == MouseButton.Right)
             {
                 if (contextMenu.CancelOpening())
                     return;

src/Avalonia.Controls/Platform/DefaultMenuInteractionHandler.cs

@@ -356,7 +356,7 @@ namespace Avalonia.Controls.Platform
         {
             var item = GetMenuItem(e.Source as IControl);
 
-            if (e.MouseButton == MouseButton.Left && item?.HasSubMenu == false)
+            if (e.InitialPressMouseButton == MouseButton.Left && item?.HasSubMenu == false)
             {
                 Click(item);
                 e.Handled = true;

src/Avalonia.Controls/RepeatButton.cs

@@ -98,10 +98,10 @@ namespace Avalonia.Controls
         {
             base.OnPointerReleased(e);
 
-            if (e.MouseButton == MouseButton.Left)
+            if (e.InitialPressMouseButton == MouseButton.Left)
             {
                 StopTimer();
             }
         }
     }
-}
+}

src/Avalonia.Controls/TabControl.cs

@@ -196,7 +196,7 @@ namespace Avalonia.Controls
 
         protected override void OnPointerReleased(PointerReleasedEventArgs e)
         {
-            if (e.MouseButton == MouseButton.Left && e.Pointer.Type != PointerType.Mouse)
+            if (e.InitialPressMouseButton == MouseButton.Left && e.Pointer.Type != PointerType.Mouse)
             {
                 var container = GetContainerFromEventSource(e.Source);
                 if (container != null

src/Avalonia.Controls/Utils/SelectingItemsControlSelectionAdapter.cs

@@ -178,7 +178,7 @@ namespace Avalonia.Controls.Utils
         /// <param name="e">The event data.</param>
         private void OnSelectorPointerReleased(object sender, PointerReleasedEventArgs e)
         {
-            if (e.MouseButton == MouseButton.Left)
+            if (e.InitialPressMouseButton == MouseButton.Left)
             {
                 OnCommit();
             }

src/Avalonia.Input/Gestures.cs

@@ -97,7 +97,7 @@ namespace Avalonia.Input
 
                 if (s_lastPress.TryGetTarget(out var target) && target == e.Source)
                 {
-                    var et = e.MouseButton != MouseButton.Right ? TappedEvent : RightTappedEvent;
+                    var et = e.InitialPressMouseButton != MouseButton.Right ? TappedEvent : RightTappedEvent;
                     e.Source.RaiseEvent(new RoutedEventArgs(et));
                 }
             }

src/Avalonia.Input/MouseDevice.cs

@@ -221,7 +221,7 @@ namespace Avalonia.Input
                     _lastClickTime = timestamp;
                     _lastClickRect = new Rect(p, new Size())
                         .Inflate(new Thickness(settings.DoubleClickSize.Width / 2, settings.DoubleClickSize.Height / 2));
-                    _lastMouseDownButton = properties.GetObsoleteMouseButton();
+                    _lastMouseDownButton = properties.PointerUpdateKind.GetMouseButton();
                     var e = new PointerPressedEventArgs(source, _pointer, root, p, timestamp, properties, inputModifiers, _clickCount);
                     source.RaiseEvent(e);
                     return e.Handled;
@@ -267,7 +267,8 @@ namespace Avalonia.Input
             if (hit != null)
             {
                 var source = GetSource(hit);
-                var e = new PointerReleasedEventArgs(source, _pointer, root, p, timestamp, props, inputModifiers);
+                var e = new PointerReleasedEventArgs(source, _pointer, root, p, timestamp, props, inputModifiers,
+                    _lastMouseDownButton);
 
                 source?.RaiseEvent(e);
                 _pointer.Capture(null);

src/Avalonia.Input/PointerEventArgs.cs

@@ -124,7 +124,7 @@ namespace Avalonia.Input
         public int ClickCount => _obsoleteClickCount;
 
         [Obsolete("Use PointerUpdateKind")]
-        public MouseButton MouseButton => Properties.GetObsoleteMouseButton();
+        public MouseButton MouseButton => Properties.PointerUpdateKind.GetMouseButton();
     }
 
     public class PointerReleasedEventArgs : PointerEventArgs
@@ -132,15 +132,21 @@ namespace Avalonia.Input
         public PointerReleasedEventArgs(
             IInteractive source, IPointer pointer,
             IVisual rootVisual, Point rootVisualPosition, ulong timestamp,
-            PointerPointProperties properties, KeyModifiers modifiers)
+            PointerPointProperties properties, KeyModifiers modifiers,
+            MouseButton initialPressMouseButton)
             : base(InputElement.PointerReleasedEvent, source, pointer, rootVisual, rootVisualPosition,
                 timestamp, properties, modifiers)
         {
-            
+            InitialPressMouseButton = initialPressMouseButton;
         }
 
-        [Obsolete("Use PointerUpdateKind")] 
-        public MouseButton MouseButton => Properties.GetObsoleteMouseButton();
+        /// <summary>
+        /// Gets the mouse button that triggered the corresponding PointerPressed event
+        /// </summary>
+        public MouseButton InitialPressMouseButton { get; }
+
+        [Obsolete("Either use GetCurrentPoint(this).Properties.PointerUpdateKind or InitialPressMouseButton, see ", true)]
+        public MouseButton MouseButton => InitialPressMouseButton;
     }
 
     public class PointerCaptureLostEventArgs : RoutedEventArgs

src/Avalonia.Input/PointerPoint.cs

@@ -49,17 +49,6 @@ namespace Avalonia.Input
         }
 
         public static PointerPointProperties None { get; } = new PointerPointProperties();
-        
-        public MouseButton GetObsoleteMouseButton()
-        {
-            if (PointerUpdateKind == PointerUpdateKind.LeftButtonPressed || PointerUpdateKind == PointerUpdateKind.LeftButtonReleased)
-                return MouseButton.Left;
-            if (PointerUpdateKind == PointerUpdateKind.MiddleButtonPressed || PointerUpdateKind == PointerUpdateKind.MiddleButtonReleased)
-                return MouseButton.Middle;
-            if (PointerUpdateKind == PointerUpdateKind.RightButtonPressed || PointerUpdateKind == PointerUpdateKind.RightButtonReleased)
-                return MouseButton.Right;
-            return MouseButton.None;
-        }
     }
 
     public enum PointerUpdateKind
@@ -72,4 +61,18 @@ namespace Avalonia.Input
         RightButtonReleased,
         Other
     }
+
+    public static class PointerUpdateKindExtensions
+    {
+        public static MouseButton GetMouseButton(this PointerUpdateKind kind)
+        {
+            if (kind == PointerUpdateKind.LeftButtonPressed || kind == PointerUpdateKind.LeftButtonReleased)
+                return MouseButton.Left;
+            if (kind == PointerUpdateKind.MiddleButtonPressed || kind == PointerUpdateKind.MiddleButtonReleased)
+                return MouseButton.Middle;
+            if (kind == PointerUpdateKind.RightButtonPressed || kind == PointerUpdateKind.RightButtonReleased)
+                return MouseButton.Right;
+            return MouseButton.None;
+        }
+    }
 }

src/Avalonia.Input/TouchDevice.cs

@@ -60,7 +60,7 @@ namespace Avalonia.Input
                         args.Root, args.Position, ev.Timestamp,
                         new PointerPointProperties(GetModifiers(args.InputModifiers, false),
                             PointerUpdateKind.LeftButtonReleased),
-                        GetKeyModifiers(args.InputModifiers)));
+                        GetKeyModifiers(args.InputModifiers), MouseButton.Left));
                 }
             }
 

tests/Avalonia.Controls.UnitTests/Platform/DefaultMenuInteractionHandlerTests.cs

@@ -18,7 +18,9 @@ namespace Avalonia.Controls.UnitTests.Platform
             default);
         
         static PointerReleasedEventArgs CreateReleased(IInteractive source) => new PointerReleasedEventArgs(source,
-            new FakePointer(), (IVisual)source, default,0, new PointerPointProperties(RawInputModifiers.None, PointerUpdateKind.LeftButtonReleased), default);
+            new FakePointer(), (IVisual)source, default,0,
+            new PointerPointProperties(RawInputModifiers.None, PointerUpdateKind.LeftButtonReleased),
+            default, MouseButton.Left);
         
         public class TopLevel
         {

tests/Avalonia.UnitTests/MouseTestHelper.cs

@@ -86,8 +86,7 @@ namespace Avalonia.UnitTests
             {
                 _pointer.Capture(null);
                 target.RaiseEvent(new PointerReleasedEventArgs(source, _pointer, (IVisual)target, position,
-                    Timestamp(), props,
-                    GetModifiers(modifiers)));
+                    Timestamp(), props, GetModifiers(modifiers), _pressedButton));
             }
             else
                 Move(target, source, position);