+ /**
+ * Listener class that adds models at runtime.
+ */
+ class Listener : public SGPropertyChangeListener
+ {
+ public:
+ Listener(FGModelMgr *mgr) : _mgr(mgr) {}
+ virtual void childAdded (SGPropertyNode * parent, SGPropertyNode * child);
+ virtual void childRemoved (SGPropertyNode * parent, SGPropertyNode * child);