Changes the properties of an existing spin button.
The adjustment, climb rate, and number of decimal places are updated accordingly.
| this |
a `GtkSpinButton` |
| adjustment |
a `GtkAdjustment` to replace the spin button’s existing adjustment, or null to leave its current adjustment unchanged |
| climb_rate |
the new climb rate |
| digits |
the number of decimal places to display in the spin button |