function(e, isDown) {
	    _preventObj.prevent = !_closestElement(e.target, _options.isClickableElement);

		_shout('preventDragEvent', e, isDown, _preventObj);
		return _preventObj.prevent;

	}
function(e, isDown) {
	    _preventObj.prevent = !_closestElement(e.target, _options.isClickableElement);

		_shout('preventDragEvent', e, isDown, _preventObj);
		return _preventObj.prevent;

	}
function ( e , isDown ) { _preventObj . prevent = ! _closestElement ( e . target , _options . isClickableElement ) ; _shout ( 'preventDragEvent' , e , isDown , _preventObj ) ; return _preventObj . prevent ; }
amount of pixels to drag to determine direction of swipe
amount of pixels to drag to determine direction of swipe
prevent drag event