jrtechs-vis/lib/hammerUtil.js

var Hammer = require('./module/hammer');

/**
 * Fake a hammer.js gesture. Event can be a ScrollEvent or MouseMoveEvent
 * @param {Element} element
 * @param {Event} event
 */
exports.fakeGesture = function(element, event) {
  var eventType = null;

  // for hammer.js 1.0.5
  // var gesture = Hammer.event.collectEventData(this, eventType, event);

  // for hammer.js 1.0.6+
  var touches = Hammer.event.getTouchList(event, eventType);
  var gesture = Hammer.event.collectEventData(this, eventType, touches, event);

  // on IE in standards mode, no touches are recognized by hammer.js,
  // resulting in NaN values for center.pageX and center.pageY
  if (isNaN(gesture.center.pageX)) {
    gesture.center.pageX = event.pageX;
  }
  if (isNaN(gesture.center.pageY)) {
    gesture.center.pageY = event.pageY;
  }

  return gesture;
};