[英]How To Make A Timer That Counts Time at a Factor of Real Time in Python?
此代碼在屏幕上彈出一個秒表。
我做了一些復制粘貼操作以獲得第二個計數器。
我正在嘗試讓第二個計數器的計數時間比該計數器的實時時間慢。
就像在頂部計數器中每經過1分鍾,在第二個計數器中經過15秒一樣。
我試過在所有地方都放置* 0.25,但還沒有得到。
from Tkinter import *
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.makeWidgets()
self.makeWidgets2()
def makeWidgets(self):
""" Make the time label. """
l = Label(self, textvariable=self.timestr)
self._setTime(self._elapsedtime)
l.pack(fill=X, expand=NO, pady=2, padx=2)
def makeWidgets2(self):
""" Make the time label. """
l = Label(self, textvariable=self.timestr)
self._setTime(self._elapsedtime)
l.pack(fill=X, expand=NO, pady=2, padx=2)
def _update(self):
""" Update the label with elapsed time. """
self._elapsedtime = time.time() - self._start
self._setTime(self._elapsedtime)
self._elapsedtime = (self._elapsedtime * 0.1)
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 Start(self):
""" Start the stopwatch, ignore if running. """
if not self._running:
''' make self.start the time now - zero'''
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._setTime(self._elapsedtime)
def main():
root = Tk()
sw = StopWatch(root)
sw.pack(side=TOP)
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='Quit', command=root.quit).pack(side=LEFT)
root.mainloop()
if __name__ == '__main__':
main()
您需要兩個必須分開的時間字符串並分別更新它們。 例如,在__init__函數中,您可以定義:
self.timestr = StringVar()
self.timestr2 = StringVar()
然后您可以在“ 開始”中分別更新它們,還可以傳遞一個rate參數來擴展時間:
self._update(self.timestr, 1.0)
self._update(self.timestr2, 0.5)
這是一個完整的工作示例:
from Tkinter import *
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.timestr2 = StringVar()
self.makeWidgets()
self.makeWidgets2()
def makeWidgets(self):
""" Make the time label. """
l = Label(self, textvariable=self.timestr)
self._setTime(self._elapsedtime, self.timestr)
l.pack(fill=X, expand=NO, pady=2, padx=2)
def makeWidgets2(self):
""" Make the time label. """
l = Label(self, textvariable=self.timestr2)
self._setTime(self._elapsedtime, self.timestr2)
l.pack(fill=X, expand=NO, pady=2, padx=2)
def _update(self, string_obj, rate):
""" Update the label with elapsed time. """
self._elapsedtime = time.time() - self._start
self._setTime(self._elapsedtime*rate, string_obj)
self._timer = self.after(50, self._update, string_obj, rate)
def _setTime(self, elap, string_obj):
""" 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)
string_obj.set('%02d:%02d:%02d' % (minutes, seconds, hseconds))
def Start(self):
""" Start the stopwatch, ignore if running. """
if not self._running:
''' make self.start the time now - zero'''
self._start = time.time() - self._elapsedtime
self._update(self.timestr, 1.0)
self._update(self.timestr2, 0.5)
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._setTime(self._elapsedtime)
def main():
root = Tk()
sw = StopWatch(root)
sw.pack(side=TOP)
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='Quit', command=root.quit).pack(side=LEFT)
root.mainloop()
if __name__ == '__main__':
main()
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