Handle "Enter" pressing at GtkEntry

[Yury Alyaev <mutab0r rambler ru>]

Hello all,

What is the right way to catch "Enter" pressing at the end of the text 
input to GtkEntry. The obvious way is conecting the callback to the 
"activate" signal, but for some reason documentation says "Applications 
should not connect to it". The alternative method is just to catch key 
press event and check if the "Enter" key is pressed, but this looks less 
convenient comparing with catching the "activate" signal. Why is 
caonnecting user callback to "activate" signal bad?

Regards,
Yury.