This is a small implementation of a stopwatch widget in Tkinter. The widget displays a label with minutes:seconds:1/100-seconds. The label is updated every 50 ms, but that can easily be changed. Methods are availble for starting, stopping and resetting the stopwatch. A simple program demonstrates the widget.
Python, 116 lines
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import time
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._running = 0
self.timestr = StringVar()
#self.lapstr = StringVar()
self.e = 0
self.m = 0
self.makeWidgets()
self.laps = []
self.lapmod2 = 0
self.today = time.strftime("%d %b %Y %H-%M-%S", time.localtime())
def makeWidgets(self):
""" Make the time label. """
l1 = Label(self, text='----File Name----')
l1.pack(fill=X, expand=NO, pady=1, padx=2)
self.e = Entry(self)
self.e.pack(pady=2, padx=2)
l = Label(self, textvariable=self.timestr)
self._setTime(self._elapsedtime)
l.pack(fill=X, expand=NO, pady=3, padx=2)
l2 = Label(self, text='----Laps----')
l2.pack(fill=X, expand=NO, pady=4, padx=2)
scrollbar = Scrollbar(self, orient=VERTICAL)
self.m = Listbox(self,selectmode=EXTENDED, height = 5,
yscrollcommand=scrollbar.set)
self.m.pack(side=LEFT, fill=BOTH, expand=1, pady=5, padx=2)
scrollbar.config(command=self.m.yview)
scrollbar.pack(side=RIGHT, fill=Y)
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 _setTime(self, elap):
""" Set the time string to Minutes:Seconds:Hundreths """
minutes = int(elap/60)
seconds = int(elap - minutes*60.0)
hseconds = int((elap - minutes*60.0 - seconds)*100)
self.timestr.set('%02d:%02d:%02d' % (minutes, seconds, hseconds))
def _setLapTime(self, elap):
""" Set the time string to Minutes:Seconds:Hundreths """
minutes = int(elap/60)
seconds = int(elap - minutes*60.0)
hseconds = int((elap - minutes*60.0 - seconds)*100)
return '%02d:%02d:%02d' % (minutes, seconds, hseconds)
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
def Reset(self):
""" Reset the stopwatch. """
self._start = time.time()
self._elapsedtime = 0.0
self.laps = []
self._setTime(self._elapsedtime)
def Lap(self):
'''Makes a lap, only if started'''
tempo = self._elapsedtime - self.lapmod2
if self._running:
self.laps.append(self._setLapTime(tempo))
self.m.insert(END, self.laps[-1])
self.m.yview_moveto(1)
self.lapmod2 = self._elapsedtime
def GravaCSV(self):
'''Pega nome do cronometro e cria arquivo para guardar as laps'''
arquivo = str(self.e.get()) + ' - '
with open(arquivo + self.today + '.txt', 'wb') as lapfile:
for lap in self.laps:
lapfile.write((bytes(str(lap) + '\n', 'utf-8')))
def main():
root = Tk()
root.wm_attributes("-topmost", 1) #always on top - might do a button for it
sw = StopWatch(root)
sw.pack(side=TOP)
Button(root, text='Lap', command=sw.Lap).pack(side=LEFT)
Button(root, text='Start', command=sw.Start).pack(side=LEFT)
Button(root, text='Stop', command=sw.Stop).pack(side=LEFT)
#Button(root, text='Reset', command=sw.Reset).pack(side=LEFT)
Button(root, text='Save', command=sw.GravaCSV).pack(side=LEFT)
Button(root, text='Quit', command=root.quit).pack(side=LEFT)
root.mainloop()
if __name__ == '__main__':
main()
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Tags: tkinter
I found that the "Quit" button didn't exit the program.
I was able to change this by editing line #111 from "command=root.quit" to "command=root.destroy".
Hmm... "Quit" quits just fine for me. root.destroy only removes the frame, doesn't quit the program.
Are you running it from IDLE?
You can activate the Reset button if you redefine the Reset function like the following: