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lamp.js

Uploaded on Jan 01 2010 19:43 by luyo1986

/**
* LavaLamp - A menu plugin for jQuery with cool hover effects.
* @requires jQuery v1.2.x
*
* http://nixbox.com/lavalamp.php
*
* Copyright (c) 2008 Jolyon Terwilliger (nixbox.com)
* Original code Copyright (c) 2007, 2008
* Dual licensed under the MIT and GPL licenses:
* http://www.opensource.org/licenses/mit-license.php
* http://www.gnu.org/licenses/gpl.html
*
* credits to Guillermo Rauch and Ganeshji Marwaha (gmarwaha.com) for previous editions
*
* Version: 1.0 - adapted for jQuery 1.2.x series
* Version: 1.1 - added linum parameter
* Version: 1.2 - modified to support vertical resizing of elements
* Version: 1.3 - enhanced automatic <li> item hi-lighting - will now default to
* location.pathname + location.search + location.hash if linum not defined.
* - always returns 'true' by default, for standard link follow through.
*
* Creates a menu with an unordered list of menu-items. You can either use the CSS
* that comes with the plugin, or write your own styles
*
* The HTML markup used to build the menu can be as simple as...
*
* <ul class="lavaLamp">
* <li><a href="#">Phone Home</a></li>
* <li><a href="#">Make Contact</a></li>
* <li><a href="#">Board Ship</a></li>
* <li><a href="#">Fly to Venus</a></li>
* </ul>
*
* Once you have included the style sheet that comes with the plugin, you will have to include
* a reference to the jQuery library, easing plugin (optional) and the LavaLamp(this) plugin.
*
* Use the following snippet to initialize the menu using jQuery easing library::
* Easing Library 1.3 available here: http://plugins.jquery.com/project/Easing
*
* $(function() { $(".lavaLamp").lavaLamp({ fx: "easeOutBack", speed: 700}) });
*
* @param Object - You can specify all the options shown below as object variables:
*
* @option fx - default is "linear"
* @example
* $(".lavaLamp").lavaLamp({ fx: "easeOutElastic" });
* @desc Creates a menu with "Elastic" easing effect. You need to include the easing plugin for this to work.
*
* @option speed - default is 500 ms
* @example
* $(".lavaLamp").lavaLamp({ speed: 500 });
* @desc Creates a menu with an animation speed of 500 ms.
*
* @option click - no defaults
* @example
* $(".lavaLamp").lavaLamp({ click: function(event, menuItem) { return false; } });
* @desc You can supply a callback to be executed when the menu item is clicked.
* The event object and the menu-item that was clicked will be passed in as arguments.
*
* @option linum - default is 'no'
* @example
* $(".lavaLamp").lavaLamp({ linum: 2 });
* @desc linum specifies the li element to default to, beginning with 0 for the first li element
* within the parent UL or OL used to initialize lavaLamp. This can be used to set default
* lavaLamp hilight on page reloads.
*/

(function($) {
$.fn.lavaLamp = function(o) {
o = $.extend({ fx: 'linear', speed: 500, click: function(){return true}, linum: 'no' }, o || {});

return this.each(function() {
var path = location.pathname + location.search + location.hash;
var $current = new Object;
var $li = $('li', this);

// check for complete path match, if so flag element into $current
if ( o.linum == 'no' )
$current = $('li a[href$="' + path + '"]', this).parent('li');

// double check, this may be just an anchor match
if ($current.length == 0 && o.linum == 'no')
$current = $('li a[href$="' + location.hash + '"]', this).parent('li');

// no default current element matches worked, or the user specified an index via linum
if ($current.length == 0 || o.linum != 'no') {
if (o.linum == 'no') o.linum = 0;
$current = $($li[o.linum]);
}

var $back = $('<li class="back"><div class="left"></div><div class="bottom"></div><div class="corner"></div></li>').appendTo(this);
var curr = $('li.current', this)[0] || $($current).addClass('current')[0];

$li.not('.back').hover(function() {
move(this);
}, function(){});

$(this).hover(function(){}, function() {
move(curr);
});

$li.click(function(e) {
setCurr(this);
return o.click.apply(this, [e, this]);
});

setCurr(curr);

function setCurr(el) {
$back.css({ 'left': el.offsetLeft+'px',
'width': el.offsetWidth+'px',
'height': el.offsetHeight+'px',
'top': el.offsetTop+'px' });
curr = el;
};

function move(el) {
$back.stop()
.animate({
width: el.offsetWidth,
left: el.offsetLeft,
height: el.offsetHeight,
top: el.offsetTop
}, o.speed, o.fx);
};
});
};
})(jQuery);

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