Property::Index mPropertyPrePosition; ///< Scroll Position ("scroll-position") [function of scroll-x, scroll-y]
Property::Index mPropertyPosition; ///< Scroll Position ("scroll-position") [function of scroll-pre-position]
Property::Index mPropertyScale; ///< Scroll Scale ("scroll-scale")
Property::Index mPropertyPrePosition; ///< Scroll Position ("scroll-position") [function of scroll-x, scroll-y]
Property::Index mPropertyPosition; ///< Scroll Position ("scroll-position") [function of scroll-pre-position]
Property::Index mPropertyScale; ///< Scroll Scale ("scroll-scale")