core/src/ons/gesture-detector.js
function extendEventData(ev) {
    var cur = this.current,
        startEv = cur.startEvent,
        lastEv = cur.lastEvent || startEv;

    // update the start touchlist to calculate the scale/rotation
    if (ev.eventType == EVENT_TOUCH || ev.eventType == EVENT_RELEASE) {
      startEv.touches = [];
      Utils.each(ev.touches, function(touch) {
        startEv.touches.push({
          clientX: touch.clientX,
          clientY: touch.clientY
        });
      });
    }

    var deltaTime = ev.timeStamp - startEv.timeStamp,
        deltaX = ev.center.clientX - startEv.center.clientX,
        deltaY = ev.center.clientY - startEv.center.clientY;

    this.getCalculatedData(ev, lastEv.center, deltaTime, deltaX, deltaY);

    Utils.extend(ev, {
      startEvent: startEv,

      deltaTime: deltaTime,
      deltaX: deltaX,
      deltaY: deltaY,

      distance: Utils.getDistance(startEv.center, ev.center),
      angle: Utils.getAngle(startEv.center, ev.center),
      direction: Utils.getDirection(startEv.center, ev.center),
      scale: Utils.getScale(startEv.touches, ev.touches),
      rotation: Utils.getRotation(startEv.touches, ev.touches)
    });

    return ev;
  }
function extendEventData(ev) {
    var cur = this.current,
        startEv = cur.startEvent,
        lastEv = cur.lastEvent || startEv;

    // update the start touchlist to calculate the scale/rotation
    if (ev.eventType == EVENT_TOUCH || ev.eventType == EVENT_RELEASE) {
      startEv.touches = [];
      Utils.each(ev.touches, function(touch) {
        startEv.touches.push({
          clientX: touch.clientX,
          clientY: touch.clientY
        });
      });
    }

    var deltaTime = ev.timeStamp - startEv.timeStamp,
        deltaX = ev.center.clientX - startEv.center.clientX,
        deltaY = ev.center.clientY - startEv.center.clientY;

    this.getCalculatedData(ev, lastEv.center, deltaTime, deltaX, deltaY);

    Utils.extend(ev, {
      startEvent: startEv,

      deltaTime: deltaTime,
      deltaX: deltaX,
      deltaY: deltaY,

      distance: Utils.getDistance(startEv.center, ev.center),
      angle: Utils.getAngle(startEv.center, ev.center),
      direction: Utils.getDirection(startEv.center, ev.center),
      scale: Utils.getScale(startEv.touches, ev.touches),
      rotation: Utils.getRotation(startEv.touches, ev.touches)
    });

    return ev;
  }
function extendEventData ( ev ) { var cur = this . current , startEv = cur . startEvent , lastEv = cur . lastEvent || startEv ; // update the start touchlist to calculate the scale/rotation if ( ev . eventType == EVENT_TOUCH || ev . eventType == EVENT_RELEASE ) { startEv . touches = [ ] ; Utils . each ( ev . touches , function ( touch ) { startEv . touches . push ( { clientX : touch . clientX , clientY : touch . clientY } ) ; } ) ; } var deltaTime = ev . timeStamp - startEv . timeStamp , deltaX = ev . center . clientX - startEv . center . clientX , deltaY = ev . center . clientY - startEv . center . clientY ; this . getCalculatedData ( ev , lastEv . center , deltaTime , deltaX , deltaY ) ; Utils . extend ( ev , { startEvent : startEv , deltaTime : deltaTime , deltaX : deltaX , deltaY : deltaY , distance : Utils . getDistance ( startEv . center , ev . center ) , angle : Utils . getAngle ( startEv . center , ev . center ) , direction : Utils . getDirection ( startEv . center , ev . center ) , scale : Utils . getScale ( startEv . touches , ev . touches ) , rotation : Utils . getRotation ( startEv . touches , ev . touches ) } ) ; return ev ; }
extend eventData for GestureDetector.gestures
@param {Object} ev
@return {Object} ev
extend eventData for GestureDetector . gestures