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   1  /*

   2   * jQuery UI Effects Drop 1.7.3

   3   *

   4   * Copyright (c) 2009 AUTHORS.txt (http://jqueryui.com/about)

   5   * Dual licensed under the MIT (MIT-LICENSE.txt)

   6   * and GPL (GPL-LICENSE.txt) licenses.

   7   *

   8   * http://docs.jquery.com/UI/Effects/Drop

   9   *

  10   * Depends:

  11   *    effects.core.js

  12   */
  13  (function($) {
  14  
  15  $.effects.drop = function(o) {
  16  
  17      return this.queue(function() {
  18  
  19          // Create element

  20          var el = $(this), props = ['position','top','left','opacity'];
  21  
  22          // Set options

  23          var mode = $.effects.setMode(el, o.options.mode || 'hide'); // Set Mode

  24          var direction = o.options.direction || 'left'; // Default Direction

  25  
  26          // Adjust

  27          $.effects.save(el, props); el.show(); // Save & Show

  28          $.effects.createWrapper(el); // Create Wrapper

  29          var ref = (direction == 'up' || direction == 'down') ? 'top' : 'left';
  30          var motion = (direction == 'up' || direction == 'left') ? 'pos' : 'neg';
  31          var distance = o.options.distance || (ref == 'top' ? el.outerHeight({margin:true}) / 2 : el.outerWidth({margin:true}) / 2);
  32          if (mode == 'show') el.css('opacity', 0).css(ref, motion == 'pos' ? -distance : distance); // Shift

  33  
  34          // Animation

  35          var animation = {opacity: mode == 'show' ? 1 : 0};
  36          animation[ref] = (mode == 'show' ? (motion == 'pos' ? '+=' : '-=') : (motion == 'pos' ? '-=' : '+=')) + distance;
  37  
  38          // Animate

  39          el.animate(animation, { queue: false, duration: o.duration, easing: o.options.easing, complete: function() {
  40              if(mode == 'hide') el.hide(); // Hide

  41              $.effects.restore(el, props); $.effects.removeWrapper(el); // Restore

  42              if(o.callback) o.callback.apply(this, arguments); // Callback

  43              el.dequeue();
  44          }});
  45  
  46      });
  47  
  48  };
  49  
  50  })(jQuery);