virtual void stretch(Vector firstCorner, Vector secondCorner, Vector offset);
virtual void moveRef(const Vector & ref, const Vector & offset);
virtual void moveSelectedRef(const Vector & ref, const Vector & offset);
virtual void stretch(Vector firstCorner, Vector secondCorner, Vector offset);
virtual void moveRef(const Vector & ref, const Vector & offset);
virtual void moveSelectedRef(const Vector & ref, const Vector & offset);