I'm trying to use a Checkbutton with a function, my_var never changes but it always call my function.
here the code:
my_var = False
def controllo_carta():
global my_var
print str(my_var)
[...]
c = tk.Checkbutton(toolbar, text="press me",onvalue=True,offvalue=False,variable=my_var,command=controllo_carta)
c.select()
c.pack(side=tk.LEFT,padx=2,pady=2)
print 'my var:' + str(my_var)
[...]
where is my mistake?
thanks!
To make your code work I would use BooleanVar() and the associated get() method to retrieve its value (http://effbot.org/tkinterbook/variable.htm)
For example: (from: http://effbot.org/tkinterbook/checkbutton.htm)
from Tkinter import *
master = Tk()
var = BooleanVar()
def cb():
print "variable is {0}".format(var.get())
c = Checkbutton(master, text="Press me", variable=var, command=cb)
c.pack()
mainloop()
For me neither BooleanVar() or IntVar() didn't work, so I had to use StringVar() instead.
Here is example code:
check_var = tk.StringVar(value="OFF")
checkbutton = tk.Checkbutton(root, text="Check me!", variable=check_var, onvalue="ON", offvalue="OFF")
