Question

How can i disable an entry using a checkbutton… i got this but it doens’t work (python 2.7.1)…

#!/usr/bin/env python2.7
# -*- coding: utf-8 -*-

from Tkinter import *

root = Tk()

class Principal(tk.Tk):
    def __init__(self, *args, **kwargs):

        foo = ""    
        nac = ""

        global ck1
        nac = IntVar()      
        ck1 = Checkbutton(root, text='Test',variable=nac, command=self.naccheck)
        ck1.pack()

        global ent
        ent = Entry(root, width = 20, background = 'white', textvariable = foo, state = DISABLED)       
        ent.pack()

    def naccheck(self):
        if nac == 1:
            ent.configure(state='disabled')
        else:
            ent.configure(state='normal')       

app=Principal()
root.mainloop()

Answer 1

I made foo and nac member variable of the Principal class

    ...
    self.foo = StringVar()
    self.foo.set("test")
    self.nac = IntVar()
    ...

Then in naccheck() reference self.nac

    def naccheck(self):
        if self.nac == 1:
            ent.configure(state='disabled')
            self.nac = 0
        else:
            ent.configure(state='normal')
            self.nac = 1

Dont forget to change ck1’s variable = self.nac
and ent’s textvariable = self.foo.

Also, you might want to make ck1 and ent member variable, as you might have problems referencing them later with naccheck()

Those changes worked fine on my Python2.7