GtkSpinButton::set_snap_to_ticks

set_snap_to_ticks() , if set to true, will restrict input values to the order of the step increment, taking the nearest value to the increment as the input value. For example, if you have set the step increment to 0.5 in a range of 0.0 to 2.5 and the user inputs 1.4, the input will be reset to 1.5 - the nearest incremental value.

The default setting is false, which allows the user to key in anything within range to the given number of decimal points.

See also: set_digits() .