busy_cursor.py

来自「Python.Tkinter编程实例代码多多学习」· Python 代码 · 共 30 行

import time
from Tkinter import *

class AfterIdleExample:
    def __init__(self, master=None):
        self.master            = master
        
        self.frame = Frame(master, relief=RAISED, borderwidth=2)
        Label(self.frame, text='Press the button\nto start operation').pack()
        self.frame.pack(padx=4, pady=4)
        Button(master, text='Start', command=self.startOP).pack(side=TOP)

    def startOP(self):
        self.displayBusyCursor()
        time.sleep(10.0)  # simulate a long operation
        
    def displayBusyCursor(self):
        self.master.configure(cursor='watch')
        self.master.update()
        self.master.after_idle(self.removeBusyCursor)
        
    def removeBusyCursor(self):
        self.master.configure(cursor='arrow')
        
root = Tk()
root.option_readfile('optionDB2')
root.title('Busy Cursor')
example = AfterIdleExample(root)
root.mainloop()