scroller.boundaryScale

Set the point at which new data will be loaded and drawn

The boundary scale to use Load new data when scrolled halfway through the current data set. Scroller uses the boundary scaling factor to decide when to redraw the table - which it typically does before you reach the end of the currently loaded data set (in order to allow the data to look continuous to a user scrolling through the data). If given as 0 then the table will be redrawn whenever the viewport is scrolled, while 1 would not redraw the table until the currently loaded data has all been shown. You will want something in the middle - the default factor of 0.5 is usually suitable.