jQuery plugin for a fancy left/right slider for prev/next type browsing

jquery.swiper.js

/**
 * Swiper jQuery Plugin
 *
 * You need to also include:
   http://www.netcu.de/jquery-touchwipe-iphone-ipad-library
 *
 * @code
 * <script>
 *   $('.track').swiper({
 *     'trainClass': 'train',
 *     'distance': 100,
 *     'speed': 300,
 *   });
 * </script>
 *
 * <div class="track">
 *   <div class="train">
 *     <div class="default">Default Text</div>
 *     <a href="/" class="left">Left Text</a>
 *     <a href="/" class="right">Right Text</a>
 *   </div>
 * </div>
 *
 * @endcode
 *
 * @param options
 * - trainClass: the class of the element that is to move along the track
 * - speed: in milliseconds
 * - distance: the travel distance in pixels
 * - easing: the easing animation string
 *
 * @return $(this)
 *
 * @author Aaron Klump, In the Loft Studios, LLC
 * @see http://www.netcu.de/jquery-touchwipe-iphone-ipad-library
 * @see http://www.intheloftstudios.com
 * @see http://gist.github.com/5126017
 */
(function($) {
  $.fn.swiper = function(options) {

    // Create some defaults, extending them with any options that were provided
    var settings = $.extend( {
      'trainClass'    : 'content',
      'travel'        : 60,
      'speed'         : 300,
      'easing'        : 'swing'
    }, options);
    var $track = $(this);
    var $train = $track.find('.' + settings.trainClass);
    if ($train.length === 0) {
      return $(this);
    }

    function moveSwiper(distance, callback) {
      var current = $train.css('left');
      if (Number(current) !== distance) {
        $train.animate({'left': distance + 'px'}, settings.speed, settings.easing, callback);
      }
    }
    function resetSwiper() {
      moveSwiper(0);
      $track
      .removeClass('moved-left')
      .removeClass('moved-right')
      $track.find('.default').show();
      $track.find('.left, .right').hide();
    }
    function moveLeft() {
      $track.removeClass('moved-right');
      $track.addClass('moved-left');
      $track.find('.left').show();
      $track.find('.default, .right').hide();
      moveSwiper(-1 * settings.travel);
    }
    function moveRight() {
      $track.removeClass('moved-left');
      $track.addClass('moved-right');
      $track.find('.right').show();
      $track.find('.default, .left').hide();
      moveSwiper(settings.travel);
    }

    var midpoint = $(window).width() / 2;
    $track.mousemove(function(e){
      if (e.pageX < midpoint
          && !$track.hasClass('moved-left')) {
        moveLeft();
      }
      else if (e.pageX > midpoint
          && !$track.hasClass('moved-right')) {
        moveRight();
      }
    });
    $track.hover(function(e) {
      if (e.pageX < midpoint) {
        moveLeft();
      }
      else if (e.pageX > midpoint) {
        moveRight();
      }
    }, function() {
      resetSwiper();
    });

    $track.touchwipe({
      wipeLeft: function() {
        moveLeft();
      },
      wipeRight: function() {
        moveRight();
      }
    });

    return $(this);
  };
})(jQuery);