GTK_COMBO_BOX_ENTRY activate signal

[André Pedralho <apedralho gmail com>]

I remember I have already developed a GTK_COMBO (deprecated) wich used
an entry as content. In this old version I could set the "activate"
signal of the (GtkCombo*)->entry. Then I could set the 'enter' key to
do something when pressed when the focus is on that entry.

Now, I'm using the GTK_COMBO_BOX_ENTRY that doesn't have the
"activate" signal, neither let me access the entry inside the combo,
as I used to do with GTK_COMBO.

Someone know how to do it?

-- 
André Pedralho
Bachelor in Computer Science
Instituto Nokia de Tecnologia