GtkAdjustment

Main Gtk struct. The GtkAdjustment struct contains the following fields. gdouble lower; the minimum value. gdouble upper; the maximum value. gdouble value; the current value. gdouble step_increment; the increment to use to make minor changes to the value. In a GtkScrollbar this increment is used when the mouse is clicked on the arrows at the top and bottom of the scrollbar, to scroll by a small amount. gdouble page_increment; the increment to use to make major changes to the value. In a GtkScrollbar this increment is used when the mouse is clicked in the trough, to scroll by a large amount. gdouble page_size; the page size. In a GtkScrollbar this is the size of the area which is currently visible.