The widget cannot be triggered by a click?

[hustcer]

It seemed that there is no api to trigger the result list by a click, even when i set minChars to 0.
I want to click somewhere and trigger the result list , so that users don't have to input a single char. I can trigger it by:
var ac = $elem.data('autocompleter');
setTimeout(function(){
ac.activateNow();
}, 400);

However, after been triggered and if I don't choose anything and blur it, the result list won't hide.
Is this a bug? Any suggestions?