stopwatch python

#! /usr/bin/python
# Author : Morten Klim Sørensen - mail@kl1m.dk
# Created: 2011 Jul 17
# Filename: stopwatch2.py
# Description:

from tkinter import *
import time
import pickle
from datetime import datetime

DataFile = 'Tider.txt'
class StopWatch(Frame):
    """ Implements a stop watch frame widget. """
    def __init__(self, parent=None, **kw):
        Frame.__init__(self, parent, kw)
        self._start = 0.0
        self._elapsedtime = 0.0
        self._pausestart = 0.0
        self._elapsedpause = 0.0
        self._running = 0
        self.timestr = StringVar()
        self.makeWidgets()

    def makeWidgets(self):
        """ Make the time label. """
        l = Label(self, textvariable=self.timestr)
        self._setTime(self._elapsedtime)
        l.grid(row=0)

    def _update(self):
        """ Update the label with elapsed time. """
        self._elapsedtime = time.time() - self._start
        self._setTime(self._elapsedtime)
        self._timer = self.after(50, self._update)

    def _updatepause(self):
        self._elapsedpause = time.time() - self._pausestart
        self._setTime(self._elapsedpause)
        self._timer = self.after(50, self._updatepause)

    def _setTime(self, elap):
        """ Set the time string to Hours:Minutes:Seconds """
        hours = int(elap/60/60)
        if hours >= 1:
            minutes = int(elap/60 - hours*60.0)
            seconds = int(elap - 3600*hours - (minutes * 60))
        else:
            minutes = int(elap/60)
            seconds = int(elap - minutes*60.0)
        #mseconds = int((elap - minutes*60.0 - seconds)*100)
        self.timestr.set('%02d:%02d:%02d' % (hours, minutes, seconds))

    def Start(self):
        """ Start the stopwatch, ignore if running. """
        if not self._running:
            self._start = time.time() - self._elapsedtime
            self._update()
            self._running = 1

    def Stop(self):
        """ Stop the stopwatch, ignore if stopped. """
        if self._running:
            self.after_cancel(self._timer)
            self._elapsedtime = time.time() - self._start
            self._setTime(self._elapsedtime)
            self._running = 0

            self._pausestart = time.time() - self._elapsedpause
            self._updatepause()

    def Reset(self):
        """ Reset the stopwatch. """
        self._start = time.time()
        self._elapsedtime = 0.0
        self._setTime(self._elapsedtime)

    def Export(self):
        """ Export date and time elapsed to file """
        current_file = ""
        try:
            current_file = pickle.load( open(DataFile, 'rb') )
        except:
            print("File Not Found")

        print(self._pausestart)
        print(self._elapsedpause)
        hours = int(self._elapsedtime/60/60)
        minutes = int(self._elapsedtime/60 - hours*60.0)
        f = open(DataFile, 'wb')
        pickle.dump(current_file + "\n" + time.strftime("%d-%m-%Y") + " - Arbejdstimer: {0}t:{1}m  |  Pause: {2}\n".format(str(hours), str(minutes), str("42")), f)
        f.close()


def main():
    root = Tk()
    root.title("Det gode stopur")
    sw = StopWatch(root)
    sw.grid(row=0, columnspan=4)

    Button(root, text='Start', command=sw.Start).grid(row=1, column=0)
    Button(root, text='Pause', command=sw.Stop).grid(row=1, column=1)
    Button(root, text='Reset', command=sw.Reset).grid(row=1, column=2)
    Button(root, text='Quit', command=root.quit).grid(row=1, column=3)
    Button(root, text='Export', command=sw.Export).grid(row=2, column=1)

    Label(root, text="Morten Klim Sørensen - www.kl1m.dk").grid(row=3, columnspan=4)

    root.mainloop()

if __name__ == '__main__':
    main()

# End of stopwatch2.py