Sure?
Did you looked at this embedded PDF: http://support.ptc.com/cs/help/thingworx_hc/thingworx_6.5_hc/Supporting%20files/Creating%20UI%20Widgets%20for%20ThingWorx.pdf
It talks about how to trigger an Event from within Javascript, a part of this to define one that you want to trigger as I can read on it, you should define it on this.widgetEvents as you use it this.widgetProperties to define properties.
Then, just look at the Google Extension and you will see something like this:
Defining it for the IDE
this.widgetEvents = function () {
return {
'Changed': {},
'DoubleClicked': {},
'BoundsChanged': {}
};
};
Triggering the event on the Runtime:
this.dblclickEventListener = function (e) {
thisWidget.jqElement.triggerHandler('DoubleClicked');
};
Best Regards,