From d63c6f69785ccb99823641d8d8f4c6896999989d Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Tue, 28 Jan 2014 16:49:20 +0000
Subject: [PATCH] From Kristofer Tingdahl, made method virtual

---
 include/osgGA/MultiTouchTrackballManipulator | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/osgGA/MultiTouchTrackballManipulator b/include/osgGA/MultiTouchTrackballManipulator
index ba70f310e..6598e6e6e 100644
--- a/include/osgGA/MultiTouchTrackballManipulator
+++ b/include/osgGA/MultiTouchTrackballManipulator
@@ -36,7 +36,7 @@ class OSGGA_EXPORT MultiTouchTrackballManipulator : public TrackballManipulator
 
     protected:
 
-        void handleMultiTouchDrag(const GUIEventAdapter* now, const GUIEventAdapter* last, const double eventTimeDelta);
+        virtual void handleMultiTouchDrag(const GUIEventAdapter* now, const GUIEventAdapter* last, const double eventTimeDelta);
 
         osg::ref_ptr<GUIEventAdapter> _lastEvent;
 };