onLoadEnd

fires after loading data from the data source has been completed

void onLoadEnd(string url,string type);

url	string	the server-side url (may be a static file or a server side script that outputs data)
type	string	('json', 'xml', 'oldxml') the data type

gantt.attachEvent("onLoadEnd", function(url, type){
    console.log("onLoadEnd",url, type)
});