X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/18ca66650a894a39b19e5b88ae9facee76071552..ad653fa23069c5d9378247084f03c9a718c3ad62:/src/generic/scrlwing.cpp

diff --git a/src/generic/scrlwing.cpp b/src/generic/scrlwing.cpp
index 921c5961ca..2135db54f4 100644
--- a/src/generic/scrlwing.cpp
+++ b/src/generic/scrlwing.cpp
@@ -1018,6 +1018,9 @@ void wxScrollHelperBase::HandleOnMouseWheel(wxMouseEvent& event)
         newEvent.SetOrientation( event.GetWheelAxis() == 0 ? wxVERTICAL : wxHORIZONTAL);
         newEvent.SetEventObject(m_win);
 
+        if ( event.GetWheelAxis() == wxMOUSE_WHEEL_HORIZONTAL )
+            lines = -lines;
+
         if (event.IsPageScroll())
         {
             if (lines > 0)