Added keyboard mouse binding usage to the osg::ApplicationUsage and

osgGA::GUIEventHandler and its subclasses.

include/osgGA/DriveManipulator

@@ -33,6 +33,8 @@ class OSGGA_EXPORT DriveManipulator : public CameraManipulator
 
         virtual ~DriveManipulator();
 
+        virtual const char* className() { return "Drive"; }
+
         virtual void setNode(osg::Node*);
 
         virtual const osg::Node* getNode() const;
@@ -45,6 +47,9 @@ class OSGGA_EXPORT DriveManipulator : public CameraManipulator
 
         virtual bool handle(const GUIEventAdapter& ea,GUIActionAdapter& us);
 
+        /** Get the keyboard and mouse usage of this manipulator.*/
+        virtual void getUsage(osg::ApplicationUsage& usage) const;
+
     protected:
 
         /** Reset the internal GUIEvent stack.*/