code: function(iDeltaX, iDeltaY) {
          this.deltaX = iDeltaX;
          this.deltaY = iDeltaY;
          this.logger.log("deltaX:" + this.deltaX + ", deltaY:" + this.deltaY);
      }
docs: Sets the pointer offset.  You can call this directly to force the
  offset to be in a particular location (e.g., pass in 0,0 to set it
  to the center of the object, as done in YAHOO.widget.Slider)
  @method setDelta
  @param {int} iDeltaX the distance from the left
  @param {int} iDeltaY the distance from the top