GtkSpinButton
without manually creating an adjustment. The value is
initially set to the minimum value and a page increment of 10 * step
is the default. The precision of the spin button is equivalent to the
precision of step
. gtkSpinButtonNewWithRange(min, max, step, show = TRUE)
min
max
step
step
is a power of ten. If the resulting precision is not suitable for your
needs, use gtkSpinButtonSetDigits
to correct it.