is it possiable to implemention "pull to refresh" function on FTscroller? about ftscroller HOT 1 OPEN

var PullToRefresh = function(ftscroller, callback){
    var cb=callback;
    var ptrActivated=false;
    var onScroll=function(data){
        if (data.scrollTop < -30){
            ptrActivated=true;
            return;
        }else if(ptrActivated){
            ptrActivated=false;
            if (data.scrollTop==0){
                cb();
            }
        }
    };
    ftscroller.addEventListener('scroll', onScroll);
};

var s = new FTScroller(...);    //Create FTScroller
var ptr = new PullToRefresh(s,function(){
    //Load data here
});