Value | Symbolic name | Description |
| 0 | Gtk::UPDATE_CONTINUOUS | Means that anytime the range slider is moved, the range value will change and the value_changed signal will be emitted. |
| 1 | Gtk::UPDATE_DISCONTINUOUS | Means that the value will only be updated when the user releases the button and ends the slider drag operation. |
| 2 | Gtk::UPDATE_DELAYED | Means that the value will be updated after a brief timeout where no slider motion occurs, so updates are spaced by a short time rather than continuous. |