def change_speed(self, delta: numbers.Real) -> None: self.speed = clamp(self.speed + delta, 0.2, 8) window.update_ui() self._set_anchor()
def insert(self, index: int, value: Transition) -> None: assert index == len(self._transitions) # Can only add items at the end self._transitions.insert(index, value) window.update_ui()