Tkinter menu checkbutton not working
in [Python]
|
From: rantingrick on 9 Jun 2010 12:54 On Jun 9, 11:26 am, Dodo <dodo_do_not_wake...(a)yahoo.Fr> 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() see my recent post on your last question. The way you are writing these classes is wrong. Always inherit from something, in this case Tk. Fix that first and then pretty up this GUI. But to answer your question "self.ck" needs to be an instance of tk.IntVar. Read more about it here... http://infohost.nmt.edu/tcc/help/pubs/tkinter/checkbutton.html
From: Terry Reedy on 9 Jun 2010 12:55 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
From: rantingrick on 9 Jun 2010 13:01 On Jun 9, 11:26 am, Dodo <dodo_do_not_wake...(a)yahoo.Fr> wrote: <snip> Also you are now NOT using 8 space indention unlike your last post -- which i applaud you for. However you've gone to the opposite extreme with 2 space indention and interlaced it with one space indention, oh dear! Please use four space indention as this is the preferred and excepted way to write python code. If you plan to write code that other Python programmers see you should read the Python style guide and follow it. Heres a link http://www.python.org/dev/peps/pep-0008/
From: Dodo on 9 Jun 2010 13:20 Le 09/06/2010 18:54, rantingrick a �crit : > On Jun 9, 11:26 am, Dodo<dodo_do_not_wake...(a)yahoo.Fr> 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() > > > see my recent post on your last question. The way you are writing > these classes is wrong. Always inherit from something, in this case > Tk. Fix that first and then pretty up this GUI. But to answer your > question "self.ck" needs to be an instance of tk.IntVar. Read more > about it here... > > http://infohost.nmt.edu/tcc/help/pubs/tkinter/checkbutton.html I already tried with self.ck = IntVar() and now it displays PY_VAR0 FYI, I'm using Thunderbird 3, which appears to have some bugs with indentation (according to Alf P. Steinbach). That's why I replaced \t by a single space
From: rantingrick on 9 Jun 2010 14:37
On Jun 9, 12:20 pm, Dodo <dodo_do_not_wake...(a)yahoo.Fr> wrote: > Le 09/06/2010 18:54, rantingrick a crit : > > > > > > > On Jun 9, 11:26 am, Dodo<dodo_do_not_wake...(a)yahoo.Fr> 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() > > > see my recent post on your last question. The way you are writing > > these classes is wrong. Always inherit from something, in this case > > Tk. Fix that first and then pretty up this GUI. But to answer your > > question "self.ck" needs to be an instance of tk.IntVar. Read more > > about it here... > > > http://infohost.nmt.edu/tcc/help/pubs/tkinter/checkbutton.html > > I already tried with self.ck = IntVar() > and now it displays PY_VAR0 > > FYI, I'm using Thunderbird 3, which appears to have some bugs with > indentation (according to Alf P. Steinbach). That's why I replaced \t by > a single space IntVar is a class and self.ck is an instance of that class which is a PY_VAR. Try print(dir(self.ck)) in your callback to see what methods are available to this instance. Im just speculating here but somehow there must be a way to "get" and "set" the IntVar's value... hmmm? You're about to kick yourself when you realize it. ;-) |