On 6/9/2010 12:26 PM, Dodo wrote:
Hello,
I trying to make this piece of code work (this is python3)
from tkinter import *
from tkinter.ttk import *
class Window:
def __init__(self):
self.root = Tk()
self.menu = Menu(self.root)
self.root['menu'] = self.menu
self.submenu = Menu(self.menu)
self.ck = 0
self.submenu.add_checkbutton(label="My checkbutton", variable=self.ck,
command=self.displayCK)
self.menu.add_cascade(label="sub", menu=self.submenu )
def displayCK(self):
print( self.ck )
app = Window()
app.root.mainloop()
The self.ck will always be 0... why?
You never change it ;-)
Passing the *value* 0 to the widget has no effect on the binding of
self.ck. You need to pass a container whose contents the widget can
modify == specifically an IntVar. See 24.1.6.4. Coupling Widget Variables.
Terry Jan Reedy
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