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python之tk简单学习之一个简单的钟表效果

# -*- coding: utf-8 -*-

# python:2.x

__author__ = ‘Administrator‘

#TK实现一个秒表效果

#目的:是为了简单学习下TK

from time import *

from Tkinter import *

class StopWatch(Frame):

    mesc=50

    def __init__(self,parent=None,**kw):

        Frame.__init__(self,parent,kw)

        self.__start=0.0

        self._elapsedtime=0.0

        self._running=False

        self.timerstr=StringVar()

        self.makeWidgets()

    def makeWidgets(self):

        #制作时间标签

        l=Label(self,textvariabke=self.timerstr)

        self._steTime(self._elapsedtime)

        l.pack(fill=X,expand=NO,pady=2,padx=2)

    def _update(self):

        ‘‘‘用逝去的时间更新标签‘‘‘

        self._elapsedtime=time()-self.__start

        self._setTime(self._elapsedtime)

        self._timer=self.after(self.mesc,self._update)

    def _setTime(self,elap):

        ‘‘‘将时间格式改成:分:秒:百分秒‘‘‘

        mintes=int(elap/60)

        seconds=int(elap-mintes*60.0)

        hoesonds=int((elap-mintes*60.-seconds)*100)

        self.timerstr.set(‘%02d:%02d:%02d‘%(mintes,seconds,hoesonds))

    def Start(self):

        ‘‘‘启动秒表,如果已经开始则忽略‘‘‘

        if not self._running:

            self.__start=time()-self._elapsedtime

            self._update()

            self._running=True

    def Stop(self):

        ‘‘‘停止秒表,如果已经停止则忽略‘‘‘

        if self._running:

            self.after_cancel(self._timer)

            self._elapsedtime=time()-self.__start

            self._running=False

    def Reset(self):

        ‘‘‘征调秒表‘‘‘

        self.__start=time()

        self._elapsedtime=0.0

        self._setTime(self._elapsedtime)

 

if __name__=="__main__":

    def main():

        tk1=Tk()

        sw=StopWatch(tk1)

        sw.pack(side=TOP)

        Button(tk1,text=‘Start‘,command=sw.Start).pack(side=LEFT)

        Button(tk1,text=‘Stop‘,command=sw.Stop).pack(side=LEFT)

        Button(tk1,text=‘Reset‘,command=sw.Reset).pack(side=LEFT)

        Button(tk1,text=‘Quit‘,command=sw.quit).pack(side=LEFT)

        tk1.mainloop()

    main()

 

python之tk简单学习之一个简单的钟表效果