gtk:scale-button-value (object)

object -- a gtk:scale-button widget
value -- a number coerced to a double float for the value of the scale button

The accessor for the value slot gets or sets the current value of the scale button. If the value is outside the minimum or maximum values of the scale button adjustment, it will be clamped to fit inside them. The scale button emits the "value-changed" signal if the value changes.