code: function(evt) {
          if (this.started && OpenLayers.Event.isMultiTouch(evt)) {
              this.pinching = true;
              var current = this.getPinchData(evt);
              this.callback("move", [evt, current]);
              this.last = current;
              // prevent document dragging
              OpenLayers.Event.stop(evt);
          } else if (this.started) {
              // Some webkit versions send fake single-touch events during
              // multitouch, which cause the drag handler to trigger
              return false;
          }
          return true;
      }
docs: Method: touchmove
  Handle touchmove events
  
  Parameters:
  evt - {Event}
  
  Returns:
  {Boolean} Let the event propagate.