The iPhone UIDatePicker and UIPicker design elements offer a fixed placement efficient (screen space) way of viewing and selecting list items from variable length lists. So the TIGGR component I am seeking would have similar functionality. The vertical mouse/swipe user input action/gesture would be to move the selected "tumbler dial", say up to 4 maximum, as in UIDatePicker. Such user action would set table(s) pointer(s) to the tumbler values in "centre of view", making the value(s) available as a user confirmed decision.