使用python创建秒表-yiteyi-C++库

本文的重点是在python中使用Tkinter创建秒表编程：Tkinter是Python的标准GUI库。Python与Tkinter相结合，提供了一种创建GUI应用程序的快速而简单的方法。Tkinter为Tk GUI工具包提供了强大的面向对象接口。Tkinter很容易入门，下面是一些示例代码，可以帮助您掌握python中的Tkinter。

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Python3

                           # Python program to create a                         
                           # a new window using Tkinter                         
                           # importing the required libraries                         
                           import                                        tkinter                         
            
                           # creating a object 'top' as instance of class Tk                         
                           top                                        =                                        tkinter.Tk()                         
            
                           # This will start the blank window                         
                           top.mainloop()                         

输出：

图片[1]-使用python创建秒表-yiteyi-C++库

使用Tkinter创建秒表

现在，让我们尝试使用Tkinter模块创建一个程序来创建秒表。秒表是一种手持式计时器，用于测量从激活到停用的特定时间所经过的时间量。一个大型数字版的秒表被称为秒表，用于远距离观看，如在体育场内。在手动计时中，时钟由按下按钮的人启动和停止。在全自动时间内，启动和停止都由传感器自动触发。 所需模块： 我们将只使用Tkinter来创建GUI，在这个程序中不会使用其他库。 源代码：

Python3

                         # Python program to illustrate a stop watch                       
                         # using Tkinter                       
                         #importing the required libraries                       
                         import                                     tkinter as Tkinter                       
                         from                                     datetime                                     import                                     datetime                       
                         counter                                     =                                     66600                       
                         running                                     =                                     False                       
                         def                                     counter_label(label):                       
                                                 def                                     count():                       
                                                 if                                     running:                       
                                                 global                                     counter                       
                                   
                                                 # To manage the initial delay.                       
                                                 if                                     counter                                     =                                     =                                     66600                                     :                       
                                                 display                                     =                                     "Starting..."                       
                                                 else                                     :                       
                                                 tt                                     =                                     datetime.fromtimestamp(counter)                       
                                                 string                                     =                                     tt.strftime(                                     "%H:%M:%S"                                     )                       
                                                 display                                     =                                     string                       
                                   
                                                 label[                                     'text'                                     ]                                     =                                     display                                     # Or label.config(text=display)                       
                                   
                                                 # label.after(arg1, arg2) delays by                       
                                                 # first argument given in milliseconds                       
                                                 # and then calls the function given as second argument.                       
                                                 # Generally like here we need to call the                       
                                                 # function in which it is present repeatedly.                       
                                                 # Delays by 1000ms=1 seconds and call count again.                       
                                                 label.after(                                     1000                                     , count)                       
                                                 counter                                     +                                     =                                     1                       
                                   
                                                 # Triggering the start of the counter.                       
                                                 count()                       
                                   
                         # start function of the stopwatch                       
                         def                                     Start(label):                       
                                                 global                                     running                       
                                                 running                                     =                                     True                       
                                                 counter_label(label)                       
                                                 start[                                     'state'                                     ]                                     =                                     'disabled'                       
                                                 stop[                                     'state'                                     ]                                     =                                     'normal'                       
                                                 reset[                                     'state'                                     ]                                     =                                     'normal'                       
                                   
                         # Stop function of the stopwatch                       
                         def                                     Stop():                       
                                                 global                                     running                       
                                                 start[                                     'state'                                     ]                                     =                                     'normal'                       
                                                 stop[                                     'state'                                     ]                                     =                                     'disabled'                       
                                                 reset[                                     'state'                                     ]                                     =                                     'normal'                       
                                                 running                                     =                                     False                       
                                   
                         # Reset function of the stopwatch                       
                         def                                     Reset(label):                       
                                                 global                                     counter                       
                                                 counter                                     =                                     66600                       
                                   
                                                 # If rest is pressed after pressing stop.                       
                                                 if                                     running                                     =                                     =                                     False                                     :                       
                                                 reset[                                     'state'                                     ]                                     =                                     'disabled'                       
                                                 label[                                     'text'                                     ]                                     =                                     'Welcome!'                       
                                   
                                                 # If reset is pressed while the stopwatch is running.                       
                                                 else                                     :                       
                                                 label[                                     'text'                                     ]                                     =                                     'Starting...'                       
                                   
                         root                                     =                                     Tkinter.Tk()                       
                         root.title(                                     "Stopwatch"                                     )                       
                                   
                         # Fixing the window size.                       
                         root.minsize(width                                     =                                     250                                     , height                                     =                                     70                                     )                       
                         label                                     =                                     Tkinter.Label(root, text                                     =                                     "Welcome!"                                     , fg                                     =                                     "black"                                     , font                                     =                                     "Verdana 30 bold"                                     )                       
                         label.pack()                       
                         f                                     =                                     Tkinter.Frame(root)                       
                         start                                     =                                     Tkinter.Button(f, text                                     =                                     'Start'                                     , width                                     =                                     6                                     , command                                     =                                     lambda                                     :Start(label))                       
                         stop                                     =                                     Tkinter.Button(f, text                                     =                                     'Stop'                                     ,width                                     =                                     6                                     ,state                                     =                                     'disabled'                                     , command                                     =                                     Stop)                       
                         reset                                     =                                     Tkinter.Button(f, text                                     =                                     'Reset'                                     ,width                                     =                                     6                                     , state                                     =                                     'disabled'                                     , command                                     =                                     lambda                                     :Reset(label))                       
                         f.pack(anchor                                     =                                     'center'                                     ,pady                                     =                                     5                                     )                       
                         start.pack(side                                     =                                     "left"                                     )                       
                         stop.pack(side                                     =                                     "left"                                     )                       
                         reset.pack(side                                     =                                     "left"                                     )                       
                         root.mainloop()                       

输出：

图片[2]-使用python创建秒表-yiteyi-C++库

图片[3]-使用python创建秒表-yiteyi-C++库

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