From 87bf7980e2de92d1277f8960b418c409f784a315 Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Wed, 20 Jul 2011 10:18:31 +0000
Subject: [PATCH] From Claus Scheiblauer, merged from svn/trunk revision 12704,
 fixed handling of horizontal mouse wheel event

---
 src/osgQt/GraphicsWindowQt.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/osgQt/GraphicsWindowQt.cpp b/src/osgQt/GraphicsWindowQt.cpp
index 01417baf1..085b5ab16 100644
--- a/src/osgQt/GraphicsWindowQt.cpp
+++ b/src/osgQt/GraphicsWindowQt.cpp
@@ -288,7 +288,9 @@ void GLWidget::wheelEvent( QWheelEvent* event )
 {
     setKeyboardModifiers( event );
     _gw->getEventQueue()->mouseScroll(
-        event->delta()>0 ? osgGA::GUIEventAdapter::SCROLL_UP : osgGA::GUIEventAdapter::SCROLL_DOWN );
+        event->orientation() == Qt::Vertical ?
+            (event->delta()>0 ? osgGA::GUIEventAdapter::SCROLL_UP : osgGA::GUIEventAdapter::SCROLL_DOWN) :
+            (event->delta()>0 ? osgGA::GUIEventAdapter::SCROLL_LEFT : osgGA::GUIEventAdapter::SCROLL_RIGHT) );
 }