tkinter prob

[JyotiC]

hi,
i am making a GUI using Tkinter,
I have a button and a checkbutton.
i want the button to be enable when checkbutton is on and disble when
the checkbutton is off.

thanx

 

[Fredrik Lundh]

i am making a GUI using Tkinter,
I have a button and a checkbutton.
i want the button to be enable when checkbutton is on and disble when
the checkbutton is off.

use the checkbutton's command option to install a callback that enables
or disables the button.

</F>

 

[JyotiC]

i have tried it out but it's not working.
this is the code

from Tkinter import *

class abc:
def __init__(self,parent):
#make container myparent
self.myparent=parent
self.myparent.geometry("500x200")

#make the initial frame
self.frame=Frame(self.myparent)
self.frame.pack()

self.var=IntVar()
self.var.set(0)

a=Button(self.frame,text="button")
a.pack()


Checkbutton(self.frame,text="hello",variable=self.var,command=self.com(a)).pack()

def com(self,a):
if self.var.get()==1:
a.config(state=ENABLED)
else:
a.config(state=DISABLED)

root=Tk()
abc(root)
root.mainloop()

 

[Eric Brunel]

i have tried it out but it's not working.
this is the code

from Tkinter import *

class abc:
def __init__(self,parent):
#make container myparent
self.myparent=parent
self.myparent.geometry("500x200")

#make the initial frame
self.frame=Frame(self.myparent)
self.frame.pack()

self.var=IntVar()
self.var.set(0)

a=Button(self.frame,text="button")
a.pack()


Checkbutton(self.frame,text="hello",variable=self.var,command=self.com(a)).pack()

This *calls* self.com(a) and assigns its *results* (which happens to be
None) to the command option in your button. So your button does nothing.

To do what you want, use:

self.a = Button(self.frame,text="button")
self.a.pack()
Checkbutton(self.frame,text="hello",variable=self.var,command=self.com).pack()

in __init__, then:

def com(self):
if self.var.get()==1:
self.a.config(state=ENABLED)
else:
self.a.config(state=DISABLED)

HTH

 

[JyotiC]

thanx
got the error,
but there is one more prob, button is not coming to enable again. once
it is disabled
the error it's giving is:-

Exception in Tkinter callback
Traceback (most recent call last):
File "/usr/lib/python2.3/lib-tk/Tkinter.py", line 1345, in __call__
return self.func(*args)
File "<stdin>", line 23, in com
NameError: global name 'ENABLED' is not defined
Exception in Tkinter callback
Traceback (most recent call last):
File "/usr/lib/python2.3/lib-tk/Tkinter.py", line 1345, in __call__
return self.func(*args)
File "<stdin>", line 23, in com
NameError: global name 'ENABLED' is not defined


is ENABLED valid option?

 

[Peter Otten]

got the error,
but there is one more prob, button is  not coming to enable again. once
it is disabled
the error it's giving is:-

NameError: global name 'ENABLED' is not defined

Try NORMAL instead of ENABLED.

Peter

 

[JyotiC]

thanx a lot
it worked

Try NORMAL instead of ENABLED.

Peter