Chapter7-3.py 文件源码

def start(self):
        if not self.task_name_entry.get():
            msg.showerror("No Task", "Please enter a task name")
            return

        if self.task_is_duplicate():
            msg.showerror("Task Duplicate", "Please enter a different task name")
            return

        if not hasattr(self, "worker"):
            self.setup_worker()

        self.task_name_entry.configure(state="disabled")
        self.start_button.configure(text="Finish", command=self.finish_early)
        self.time_remaining_var.set("25:00")
        self.pause_button.configure(state="normal")
        self.add_new_task()
        self.task_finished_early = False
        self.worker.start()