Snap.svg - drag event handler

Question

Question is about the onstart event handler for Element.drag in the newly announced Snap.svg.

The intention of the code below is to register event handlers for the start

Answer 1

There is an example how to drag with SnapSVG here: http://svg.dabbles.info/snaptut-drag.html

var s = Snap("#svgout");

var rect = s.rect(20,20,40,40);
var circle = s.circle(60,150,50);

var move = function(dx,dy) {
        this.attr({
                    transform: this.data('origTransform') + (this.data('origTransform') ? "T" : "t") + [dx, dy]
                });
}

var start = function() {
        this.data('origTransform', this.transform().local );
}
var stop = function() {
        console.log('finished dragging');
}

rect.drag(move, start, stop );
circle.drag(move, start, stop );