Gtk::Entry end editing signal

[Pedro Sousa <pasousa ml gmail com>]

Hi everyone,

In project I'm involved, I need to read data changed from a Gtk::Entry, 
so I need to use signals in Gtk::Entry for the following events:
   - When a user press ENTER button
   - When the user selects another widgets

I tried to use the signal "signal_editing_done" derived from 
Gtk::Widget, but with no lucky, because I can't trigger it. When is this 
signal triggered?

For the problem that I've, the best approach (until) now is to use the 
"signal_changed" event, but this is not optimal.

What solutions can I use for this problem?

Thanks in advance
   Pedro Sousa