Callbacks on jQuery Tipsy hide / show

I'm trying to set a callback function after tipsy opens / closes.

function addText()
{
    $('#text').html('Tipsy is now open !');
}

$('.tipsy').tipsy(addText);   

I want addText() to run after tipsy opens, but it doesn't.

Is there an easy way to do that without modifying tipsy core code ?

Here is my jsfiddle : http://jsfiddle.net/Tqcgr/1/

It was easy to add onShow and onHide callbacks. Check this out: http://jsfiddle.net/Tqcgr/2/

BUT you need to modify show and hide methods.

//show
var callback = this.options.onShow,
    element = this.$element[0],
    runCallback = function() {
        if(callback){
            callback.call(element);   
        }
    };

//invoke
if (this.options.fade) {
    $tip.stop().css({opacity: 0, display: 'block', visibility: 'visible'}).animate({opacity: this.options.opacity}, runCallback);
} else {
    $tip.css({visibility: 'visible', opacity: this.options.opacity});
    runCallback();
}

//hide
var callback = this.options.onHide,
    element = this.$element[0],
    runCallback = function() {
        if(callback){
            callback.call(element);
        }                        
    };
    //invoke
if (this.options.fade) {
    this.tip().stop().fadeOut(function() { $(this).remove(); runCallback()});
} else {
    this.tip().remove();
    runCallback();
}