Expand the rectangle.
CL_Rectx<Type>& CL_Rectx< Type >::expand( const Type & left, const Type & top, const Type & right, const Type & bottom); CL_Rectx<Type>& CL_Rectx< Type >::expand( const Type & left_and_right, const Type & top_and_bottom); CL_Rectx<Type>& CL_Rectx< Type >::expand( const Type & expand);