/*

 * jQuery UI Effects Drop 1.8.1

 *

 * Copyright (c) 2010 AUTHORS.txt (http://jqueryui.com/about)

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

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

 *

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

 *

 * Depends:

 *	jquery.effects.core.js

 */

(function($) {

$.effects.drop = function(o) {

	return this.queue(function() {

		// Create element

		var el = $(this), props = ['position','top','left','opacity'];

		// Set options

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

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

		// Adjust

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

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

		var ref = (direction == 'up' || direction == 'down') ? 'top' : 'left';

		var motion = (direction == 'up' || direction == 'left') ? 'pos' : 'neg';

		var distance = o.options.distance || (ref == 'top' ? el.outerHeight({margin:true}) / 2 : el.outerWidth({margin:true}) / 2);

		if (mode == 'show') el.css('opacity', 0).css(ref, motion == 'pos' ? -distance : distance); // Shift

		// Animation

		var animation = {opacity: mode == 'show' ? 1 : 0};

		animation[ref] = (mode == 'show' ? (motion == 'pos' ? '+=' : '-=') : (motion == 'pos' ? '-=' : '+=')) + distance;

		// Animate

		el.animate(animation, { queue: false, duration: o.duration, easing: o.options.easing, complete: function() {

			if(mode == 'hide') el.hide(); // Hide

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

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

			el.dequeue();

		}});

	});

};

})(jQuery);