Tkinter，如何根据复选框状态设置某些元素的状态

Question

I have variable pliki which is from checkbox

pliki = IntVar()
plikiC = Checkbutton(secunderFrame, text="Twórz pliki",
                     font=("Bookman Old Style", 8, 'bold'),
                     variable=pliki, onvalue=True, offvalue=False)

if pliki.get() == 1:
    liczba_pE['state'] = NORMAL
    nazwa_pE['state'] = NORMAL
    tresc_pE['state'] = NORMAL

if pliki.get() == 0:
    liczba_pE['state'] = DISABLED
    nazwa_pE['state'] = DISABLED
    tresc_pE['state'] = DISABLED

This code don't work as I had meant to work. I want if checkbox is checked set state of some elements to NORMAL but when not checked set to DISABLE

Answer 1

I've done something similar with a RadioButton() by linking the command to a function that hides it:

v = tk.IntVar()
tk.Radiobutton(self.widget, text="Turn on", variable=v, value=1, command=self.show_other_widget).grid(row=0, column=0)
tk.Radiobutton(self.widget, text="Turn off", variable=v, value=2, command=self.hide_other_widget).grid(row=0, column=1)

Which links to:

def hide_other_widget(self):
    self.other_widget.configure(state='disabled')

def show_other_widget(self):
    self.other_widget.configure(state='normal')

I don't think you can do this with a single Checkbutton though because the command is only run when it is turned on and not when it is turned off (As described at http://effbot.org/tkinterbook/checkbutton.htm ). You could instead use a thread to continually check the button status and adjust your widget accordingly though!

import threading

def check_button_status():
    while True:
        status = pliki.get()
        if status == 1:
            liczba_pE['state'] = NORMAL
            nazwa_pE['state'] = NORMAL
            tresc_pE['state'] = NORMAL
        else:
            liczba_pE['state'] = DISABLED
            nazwa_pE['state'] = DISABLED
            tresc_pE['state'] = DISABLED

pliki = IntVar()
plikiC = Checkbutton(secunderFrame, text="Twórz pliki",
                     font=("Bookman Old Style", 8, 'bold'),
                     variable=pliki, onvalue=True, offvalue=False)
t = threading.Thread(target=check_button_status) # make our thread
t.start() # have it monitor the button status forever