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一秒执行一次
flash and beep every second using after() callback loop
from tkinter import *
class Alarm(Frame): def init(self, msecs=1000): # default = 1 second Frame.init(self) self.msecs = msecs self.pack() stopper = Button(self, text='Stop the beeps!', command=self.quit) stopper.pack() stopper.config(bg='navy', fg='white', bd=8) self.stopper = stopper self.repeater()
代码语言：javascript复制def repeater(self): # on every N millisecs
self.bell() # beep now
self.stopper.flash() # flash button now
self.after(self.msecs, self.repeater) # reschedule handlerif name == 'main': Alarm(msecs=1000).mainloop()
消失隐藏
customize to erase or show button on after() timer callbacks
from tkinter import * import alarm
class Alarm(alarm.Alarm): # change alarm callback def init(self, msecs=1000): # default = 1 second self.shown = False alarm.Alarm.init(self, msecs)
代码语言：javascript复制def repeater(self): # on every N millisecs
self.bell() # beep now
if self.shown:
self.stopper.pack_forget() # hide or erase button now
else: # or reverse colors, flash...
self.stopper.pack()
self.shown = not self.shown # toggle state for next time
self.after(self.msecs, self.repeater) # reschedule handler
