Hi, Thus spoketh Mark Summerfield <l...@qtrac.plus.com> unto us on Wed, 13 Jun 2012 13:55:36 +0100:
> > I didn't check "everything", but I tried it and it worked. I respects > the from and to values (when using the up and down arrows or the up and > down arrow keys), but just like tk.Spinbox allows you to type in any old > junk. Sure, if you want only a certain set of values to be legal, you need to deal with validatecommand and friends, see http://www.tcl.tk/man/tcl8.4/TkCmd/spinbox.htm#M26 Validation is not exactly trivial in Python though, because you will have to manage percent substitutions yourself, as in this little example of a spinbox that only accepts float values between -10.0 and 100.0: ######################################## from Tkinter import * root = Tk() var = StringVar() var.set('0') s = Spinbox(root, from_=-10.0, to=100.0, increment=1, textvariable=var, validate='all', format='%0.1f') s.pack() def validate(old, new): if new == '': res = True else: try: x = float(new) if float(s['from']) <= x <= float(s['to']): res = True else: res = False except ValueError: res = False return res vcmd = (s.register(validate), '%s', '%P') s.config(vcmd=vcmd, invcmd=s.bell) root.mainloop() ######################################## Regards Michael .-.. .. ...- . .-.. --- -. --. .- -. -.. .--. .-. --- ... .--. . .-. There is a multi-legged creature crawling on your shoulder. -- Spock, "A Taste of Armageddon", stardate 3193.9 _______________________________________________ Tkinter-discuss mailing list Tkinter-discuss@python.org http://mail.python.org/mailman/listinfo/tkinter-discuss
