[pygtk] make button insenstive when the contents of gtk.Entry have changed

[Thomas Mills Hinkle]

On 11/14/06, John Kelly <kelly_worth2003 at yahoo.co.uk> wrote:
>
> Hello everyone,
>
> I need some help in making a gtk.Button insensitive when a gtk.Entry
> contents have changed. I have tried many different signals, each of them
> failed to do what i wanted.


I'm confused -- have you tried simply using the 'changed' signal on the
Entry?

Here's some quick code that seems to do what you want:

import gtk

e =3D gtk.Entry()
b =3D gtk.Button('Test Button')
b.set_sensitive(False)

def entry_changed_cb (entry):
    text =3D entry.get_text()
    if text: b.set_sensitive(True)
    else: b.set_sensitive(False)

e.connect('changed',entry_changed_cb)

w =3D gtk.Window()
vb =3D gtk.VBox()
vb.add(e); vb.add(b)
w.add(vb)
w.show_all()
w.connect('delete-event',gtk.main_quit)
gtk.main()
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