Question

此代码会在屏幕上弹出一个小秒表我做了一些复制粘贴以获得第二个计数器我试图让第二个计数器的计数时间比计数器的实际时间慢就像在顶部计数器中经过的每1分钟在第二个计数器中经过15秒我试过把* 0.25放在任何地方，但没有得到它。

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()

Answer 1

您需要两个必须分开时间字符串并单独更新它们。例如，在__init__函数中，您可以定义：

self.timestr = StringVar()
self.timestr2 = StringVar()

然后你可以在开始中单独更新它们，并传递一个速率参数来缩放时间：

self._update(self.timestr, 1.0)
self._update(self.timestr2, 0.5)

这是一个完整的工作示例：

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()

如何在Python中制作一个以实时因素计算时间的计时器？

1 个答案: