From Jaap Glas, "Added a default parameter to the following constructor in TabPlaneDragger

and TabPlaneDragger.cpp:

TabPlaneDragger(float handleScaleFactor=20.0f);

The reason for this is that the default OSG tab sizes are way bigger than
those we used in our application so far. And since handleScaleFactor_
is already a (constant) class member, I see no objection against making
it user defined."

src/osgManipulator/TabPlaneDragger.cpp

@@ -191,7 +191,8 @@ void createTranslateDraggerGeometry(Scale2DDragger* cornerScaleDragger, Translat
 
 }
 
-TabPlaneDragger::TabPlaneDragger() : _handleScaleFactor(20.0)
+TabPlaneDragger::TabPlaneDragger( float handleScaleFactor )
+          :_handleScaleFactor( handleScaleFactor )
 {
     _cornerScaleDragger = new Scale2DDragger(Scale2DDragger::SCALE_WITH_OPPOSITE_HANDLE_AS_PIVOT);
     addChild(_cornerScaleDragger.get());