Tkinter Menu Item Activation

[Rob Wolfe]

MartinRinehart at gmail.com writes:

> Tkinter definitely deserves more respect! I'm making rapid progress
> and it looks good.
>
> But am stuck on this: I want the File/Save state to change from
> disabled to enabled, depending on whether or not there is something to
> save (Text modified). Google returns results in every language except
> Python.
> Sub problems: how to change state of menu item? how to detect changes
> in Text widget?
>
> Help appreciated.

State of menu items can be changed like this:

<code>
import Tkinter as Tk

def hello():
    if mfile.entrycget(2, 'state') == 'disabled':
        state = 'normal'
    else:
        state = 'disabled'
    mfile.entryconfigure(2, state=state)

root = Tk.Tk()
menubar = Tk.Menu(root)
mfile = Tk.Menu(menubar)
mfile.add_command(label="Open", command=hello)
mfile.add_command(label="Save", command=hello)
menubar.add_cascade(label='File', menu=mfile)
root.config(menu=menubar)
root.mainloop()
</code>

But I think that you should read this:
http://effbot.org/zone/vroom.htm

HTH,
Rob