code: function(evt) {
          var distance = this.getDistance(evt.touches);
          var scale = distance / this.start.distance;
          return {
              distance: distance,
              delta: this.last.distance - distance,
              scale: scale
          };
      }
docs: Method: getPinchData
  Get informations about the pinch event.
  
  Parameters:
  evt - {Event}
  
  Returns:
  {Object} Object that contains data about the current pinch.