def restorePriorities(self): for task, oldPriority in zip(self.items, self.oldPriorities): task.setPriority(oldPriority)
def changePriorities(self, delta): for task in self.items: task.setPriority(task.priority() + delta)
def setNewExtremePriority(self): newExtremePriority = self.oldExtremePriority + self.delta for task in self.items: task.setPriority(newExtremePriority)