int firstItemIndex = std::max(0.0f, -firstItemPosition -1.0f );
int lastItemIndex = std::max(0.0f, -(firstItemPosition) + itemsPerPage );
int firstItemIndex = std::max(0.0f, -firstItemPosition -1.0f );
int lastItemIndex = std::max(0.0f, -(firstItemPosition) + itemsPerPage );