使用相同的2个控制按钮控制多个输入按钮

Question

我相信这段代码是关闭的 - 我有三个按钮用回调定义，用于存储与所选按钮关联的IntVar（）变量。我创建了一个临时变量（cntr），用于存储相应的Intvar。这似乎是基于我在回调中的打印声明工作。但是当我选择其中一个按钮时，点击在代码末尾配置的inc或dec按钮，唯一改变的“entry”按钮就是在代码的主要部分中设置的那个按钮。谁能告诉我什么我缺少

#!/usr/bin/python3 

from tkinter import * 
from tkinter import PhotoImage 

def increment (cntr): 
    print('in inc', cntr) 
    cntr.set("{0:0>4}".format(cntr.get() + 1)) 

def decrement (cntr): 
    print('in dec', cntr) 
    cntr.set("{0:0>4}".format(cntr.get() - 1)) 

def EntryCB(arg): 
    global cntr 
    cntr = arg 
    print('in EntryCB', cntr, arg) 

root = Tk() 
root.configure(bg='white') 
frame1 = LabelFrame(root, text="Component 1",) 
frame1.grid() 

#UpArrow = PhotoImage(file="images//UpArrow.png") 
#DownArrow = PhotoImage(file="images/DownArrow.png") 

counter1 = IntVar() 
counter1.set("{0:0>4}".format(0)) 
counter2 = IntVar() 
counter2.set("{0:0>4}".format(0)) 
counter3 = IntVar() 
counter3.set("{0:0>4}".format(0)) 
cntr=counter1 

print('in main', cntr) 

#setup entry buttons tied to IntVar variables 
Entry1 = Button(frame1, textvariable=counter1) 
Entry1.grid(row=0, column=0) 
Entry1.config(command= lambda arg=counter1:EntryCB(arg)) 
Entry1.configure(borderwidth=3, relief='sunken', bg='green') 
Entry2 = Button(frame1, textvariable=counter2) 
Entry2.grid(row=0, column=1) 
Entry2.config(command= lambda arg=counter2:EntryCB(arg)) 
Entry2.configure(borderwidth=3, relief='sunken', bg='pink') 
Entry3 = Button(frame1, textvariable=counter3) 
Entry3.grid(row=0, column=2) 
Entry3.config(command= lambda arg=counter3:EntryCB(arg)) 
Entry3.configure(borderwidth=3, relief='sunken', bg='orange') 

#setup callback and display control buttons to increment or decrement the IntVar 
Inc = Button(frame1,text='Inc') 
Inc.grid(row=1, column=0) 
Inc.configure(command= lambda arg=cntr:increment(arg)) 
Dec = Button(frame1,text='Dec') 
Dec.grid(row=1, column=1) 
Dec.configure(command= lambda arg=cntr:decrement(arg)) 

root.mainloop() 

Answer 1

确定 - 它多一点玩 - 这里是一个答案 - 但也有采用原代码，我张贴的东西更优雅的 - 我只是不明白为什么原始代码不起作用。预先感谢您看看它

from tkinter import * 
from tkinter import PhotoImage 

def increment (event): 
    global cntr 
    print('in inc', cntr) 
    cntr.set("{0:0>4}".format(cntr.get() + 1)) 

def decrement (event): 
    global cntr 
    print('in dec', cntr) 
    cntr.set("{0:0>4}".format(cntr.get() - 1)) 

def EntryCB(arg): 
    global cntr, counter1, counter2, counter3 
    if arg == 1: 
     cntr=counter1 
    elif arg == 2: 
     cntr=counter2 
    elif arg == 3: 
     cntr=counter3 
    print('in EntryCB', cntr, arg) 

root = Tk() 
root.configure(bg='white') 
frame1 = LabelFrame(root, text="Component 1",) 
frame1.grid() 

#UpArrow = PhotoImage(file="images//UpArrow.png") 
#DownArrow = PhotoImage(file="images/DownArrow.png") 

counter1 = IntVar() 
counter1.set("{0:0>4}".format(0)) 
counter2 = IntVar() 
counter2.set("{0:0>4}".format(0)) 
counter3 = IntVar() 
counter3.set("{0:0>4}".format(0)) 
cntr=1 

print('in main', cntr) 

Entry1 = Button(frame1, textvariable=counter1) 
Entry1.grid(row=0, column=0) 
Entry1.config(command= lambda arg=1:EntryCB(arg)) 
Entry1.configure(borderwidth=3, relief='sunken', bg='green') 
Entry2 = Button(frame1, textvariable=counter2) 
Entry2.grid(row=0, column=1) 
Entry2.config(command= lambda arg=2:EntryCB(arg)) 
Entry2.configure(borderwidth=3, relief='sunken', bg='pink') 
Entry3 = Button(frame1, textvariable=counter3) 
Entry3.grid(row=0, column=2) 
Entry3.config(command= lambda arg=3:EntryCB(arg)) 
Entry3.configure(borderwidth=3, relief='sunken', bg='orange') 

Inc = Button(frame1,text='Inc') 
Inc.bind("<Button-1>",increment) 
Inc.grid(row=1, column=0) 
#Inc.configure(command= lambda arg=cntr:increment(arg)) 
Dec = Button(frame1,text='Dec') 
Dec.bind("<Button-1>",decrement) 
Dec.grid(row=1, column=1) 
#Dec.configure(command= lambda arg=cntr:decrement(arg)) 

root.mainloop()