From ae207aa1946157493f4dfae52e7a3a8e8e35eb2f Mon Sep 17 00:00:00 2001
From: Dan Walmsley <dan@walms.co.uk>
Date: Tue, 24 Jul 2018 21:58:28 +0100
Subject: [PATCH] implement mouse wheel events.

---
 src/Avalonia.Windowing/WindowImpl.cs | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/Avalonia.Windowing/WindowImpl.cs b/src/Avalonia.Windowing/WindowImpl.cs
index 6d0658b477..516c21598f 100644
--- a/src/Avalonia.Windowing/WindowImpl.cs
+++ b/src/Avalonia.Windowing/WindowImpl.cs
@@ -172,9 +172,15 @@ namespace Avalonia.Windowing
         {
             Dispatcher.UIThread.RunJobs(DispatcherPriority.Input);
 
-            if (evt.EventType == MouseEventType.Move)
+            switch(evt.EventType)
             {
-                _lastPosition = evt.Position;
+                case MouseEventType.Move:
+                    _lastPosition = evt.Position;
+                    break;
+
+                case MouseEventType.Wheel:
+                    Input(new RawMouseWheelEventArgs(MouseDevice, (uint)Environment.TickCount, _inputRoot, new Point(_lastPosition.X, _lastPosition.Y), new Point(evt.Position.X, evt.Position.Y), InputModifiers.None));
+                    return;
             }
 
             Input(new RawMouseEventArgs(MouseDevice, (uint)Environment.TickCount, _inputRoot, (RawMouseEventType)evt.EventType, new Point(_lastPosition.X, _lastPosition.Y), InputModifiers.None));