Events other than 'place_changed' for Google Maps Autocomplete

I have an app that currently fires correctly on place_changed.

However, I want to branch search to behave differently when a user has selected an autocomplete entry, and when they have entered text on their own without the assistance of autocomplete.

What kind of event listener should I use to make the distinction? I cannot find any documentation on other events for Google Maps Autocomplete.

what I have now:

var gmaps = new google.maps.places.Autocomplete($("#searchproperties").get(0), 
{ types: ['geocode'], componentRestrictions: {country: 'us'} });

google.maps.event.addListener(gmaps, 'place_changed', function () {
    //FIRE SEARCH
});

from Events other than 'place_changed' for Google Maps Autocomplete