Hi, Thanks for your reply. It wasn't lazyness, believe me, I did look around for solutions and found something similar to yours here:
http://www.astro.washington.edu/owen/TkinterSummary.html#TracingVariables The problem is that I have a class and it wants the callback function to be a global name (I also can't figure out hot to pass parameters to it) By being a global name I can't access the var with widget.getvar(), and it complains if I use root by saying: Exception in Tkinter callback Traceback (most recent call last): File "C:\Python24\Lib\lib-tk\Tkinter.py", line 1345, in __call__ return self.func(*args) File "C:\Workplace\python\piim\Tkclient.py", line 312, in doLangChoices varValue = root.getvar(name) AttributeError: Tkclient instance has no attribute 'getvar' The code on the class follows: class StartWin: def initialize(self): self.startw=Tk(className="Login") self.startw.servlab=Label(self.startw, text="Server:") self.startw.servin=Entry(self.startw, width=15) self.startw.servlab.grid(column=0, row=0) self.startw.servin.grid(column=1, row=0) self.startw.portlab=Label(self.startw, text="Port:") self.startw.portin=Entry(self.startw, width=15) self.startw.portlab.grid(column=0, row=1) self.startw.portin.grid(column=1, row=1) self.startw.nicklab=Label(self.startw, text="Nickname:") self.startw.nickin=Entry(self.startw, width=15) self.startw.nicklab.grid(column=0, row=2) self.startw.nickin.grid(column=1, row=2) self.startw.l1=Label(self.startw, text="Language:") self.startw.l1.grid(column=0, row=3) OPTIONS = ["en","pt","es","it","fr","de"] self.startw.variable = StringVar() self.startw.variable.set(OPTIONS[0]) # default value self.startw.variable.trace('w', doLangChoices) # trace choices self.startw.whis_butt=apply(OptionMenu, (self.startw, self.startw.variable) + tuple(OPTIONS)) self.startw.whis_butt.grid(column=1, row=3) self.startw.login_butt=Button(self.startw, text="Login", command=self.login) self.startw.login_butt.grid(column=0, row=4) self.startw.exit_butt=Button(self.startw, text="Exit", command=self.exit) self.startw.exit_butt.grid(column=1, row=4) self.startw.mainloop() #connect client with inserted data def login(self): start_client(self.startw.servin.get(), int(self.startw.portin.get()), self.startw.nickin.get(), self.startw.variable.get()) def exit(self): self.startw.quit() self.startw.destroy() #sys.exit() def doLangChoices(name, index, mode): print "callback called with name=%r, index=%r, mode=%r" % (name, index, mode) # HOW TO ACCESS THE VAR VALUE HERE?? #varValue = root.getvar(name) #print varValue print "Client Started" try: conn=StartWin() conn.initialize() root=Tkclient() thread.start_new_thread(listen_server, (client, root)) root.startWindow() except Exception: print "Client thread aborted" >From: geon <[EMAIL PROTECTED]> >To: Jorge Louis De Castro <[EMAIL PROTECTED]> >CC: tutor@python.org >Subject: Re: [Tutor] Event handler for optionmenu >Date: Mon, 15 Aug 2005 11:41:30 +0200 > >Jorge Louis De Castro napsal(a): > >>Hi, >> I have an optionmenu widget that works just fine except that can't find >>docs to get hold of events as they happen, kinda like the command=XYZ of >>other widgets like buttons. >> The code I'm using for the option menu is the following: >> OPTIONS = ["en","pt","es","it","fr","de"] >>self.startw.variable = StringVar() >>self.startw.variable.set(OPTIONS[0]) # default value >>self.startw.whis_butt=apply(OptionMenu, (self.startw, >>self.startw.variable) + tuple(OPTIONS)) >>self.startw.whis_butt.grid(column=1, row=3) >> Now I'd like to have a function like: >> def onChange(self): >> # do optionmenu specific stuff >> but can't find how to do it, how to associate/bind onChange with the >>optionmenu widget. >>Any help will be highly appreciated. >> > >This art is called Trace Variable and could be used like this (copied and >rearranged from one of the prevously posted message from here): > >from Tkinter import * > >OPTIONS = [ > "egg", > "bunny", > "chicken" >] > >def callbackFunc(name, index, mode): > #print "callback called with name=%r, index=%r, mode=%r" % (name, index, >mode) > varValue = root.getvar(name) > print varValue > # modify the value, just to show it can be done > #root.setvar(name, varValue) > >root = Tk() >var = StringVar() >var.set(OPTIONS[2]) # default value >rememberMe = var.trace_variable('w', callbackFunc) # var.trace('w', >callbackFunc) # this works, too > > > >w = OptionMenu (root, var, *OPTIONS) >w.pack() > > >root.mainloop() > >Hope its what you asked for :-) > >-- >geon _______________________________________________ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
