gtk:spin-button-new (adjustment rate digits)

adjustment -- a gtk:adjustment object that this spin button should use, or nil
rate -- a number coerced to a double float which specifies how much the spin button changes when an arrow is clicked on
digits -- an unsigned integer for the number of decimal places to display

The new gtk:spin-button widget.

Creates a new spin button. If the adjustment argument is nil, the adjustment of the spin button is intialized with default values.