Fixed an overflow exception when extracting delta from mouse horizont…

…al wheel native event.
rvuistin · Jun 13, 2016 · c13e2c0 · c13e2c0
1 parent 6eef7d2
commit c13e2c0
Showing 1 changed file with 3 additions and 3 deletions.
diff --git a/Lib/Windows/Input/MouseWheel/MouseWheelController.cs b/Lib/Windows/Input/MouseWheel/MouseWheelController.cs
@@ -209,9 +209,9 @@ private IntPtr              MouseHorizontalWheelHook(IntPtr hwnd, int msg, IntPt
                     {
                         var timestamp = Environment.TickCount;
                         var originalSource = Mouse.DirectlyOver;
-                        var delta = wParam.ToInt32 () >> 16;
-                        var ie = new MouseWheelInputEventArgs (this, MouseWheel.Current, timestamp, -delta, Orientation.Horizontal);
-                        OnPreviewMouseWheel (originalSource, ie);
+                        var delta = (short)unchecked((uint)(long)wParam >> 16);
+                        var ie = new MouseWheelInputEventArgs(this, MouseWheel.Current, timestamp, -delta, Orientation.Horizontal);
+                        OnPreviewMouseWheel(originalSource, ie);
                         break;
                     }
             }