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jquery.firefly-0.4.js
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jquery.firefly-0.4.js
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/*
* jQuery firefly plugin 0.4
*
*
* Copyright (c) 2010 Dharmveer Motyar
* http://motyar.blogspot.com
*
* $Id$
*
* licensed under the MIT licenses:
* http://www.opensource.org/licenses/mit-license.php
*
*
* Creates a firefly effect.
*
* @example $.firefly();
*
* @name firefly
* @type jQuery
* @cat Plugins/firefly
*/
(function($) {
/*
* Plugin defaults
*/
var defaults = {
total : 10,
ofTop: 0,
ofLeft: 0,
on:'document.body',
twinkle: 0.2,
minPixel: 1,
maxPixel: 2,
color: '#fff',
namespace: 'jqueryFireFly',
_paused: false,
};
$.firefly = function(settings) {
$.firefly.settings = $.extend({}, defaults, settings);
$.firefly.eleHeight = $($.firefly.settings.on).height();
$.firefly.eleWidth = $($.firefly.settings.on).width();
if ($.firefly.settings.on!=='document.body') {
var off = $($.firefly.settings.on).offset();
$.firefly.offsetTop = off.top;
$.firefly.offsetLeft = off.left;
$.firefly.eleHeight = $($.firefly.settings.on).height();
$.firefly.eleWidth = $($.firefly.settings.on).width();
} else {
$.firefly.offsetTop = 0;
$.firefly.offsetLeft = 0;
$.firefly.eleHeight = $(document.body).height();
$.firefly.eleWidth = $(document.body).width();
}
for (i = 0; i < $.firefly.settings.total; i++){
var randomPixel = $.firefly.randomPixel($.firefly.settings.minPixel, $.firefly.settings.maxPixel);
var sp = $.firefly.create(randomPixel);
$.firefly.fly(sp);
}
$.firefly.sparks = $($.firefly.settings.on).children('.' + $.firefly.settings.namespace);
this.pause = function(bool) {
$.firefly.settings._paused = true;
if (bool) {
$.each($.firefly.sparks, function(iter, sp) {
$(sp).stop(true);
});
}
};
this.resume = function() {
$.firefly.settings._paused = false;
$.each($.firefly.sparks, function(iter, sp) {
$.firefly.fly(sp);
});
};
return this;
};
$.firefly.create = function(pixelSize){
spark = $('<div>').hide();
spark.addClass($.firefly.settings.namespace);
$.firefly.settings._onSparkID++;
if ($.firefly.settings.on === 'document.body') {
$(document.body).append(spark);
} else {
$($.firefly.settings.on).append(spark);
}
return spark.css({
'position':'absolute',
'width' : pixelSize,
'height': pixelSize,
'background-color': $.firefly.settings.color,
'z-index': $.firefly.random(20), //under all the stuff
top: $.firefly.offsetTop + $.firefly.random(($.firefly.eleHeight-50)), //offsets
left: $.firefly.offsetLeft + $.firefly.random(($.firefly.eleWidth-50)) //offsets
}).show();
};
$.firefly.fly = function(sp) {
$(sp).animate({
top: $.firefly.offsetTop + $.firefly.random(($.firefly.eleHeight-50)), //offsets
left: $.firefly.offsetLeft + $.firefly.random(($.firefly.eleWidth-50)),
opacity: $.firefly.opacity($.firefly.settings.twinkle)
}, {
duration: (($.firefly.random(10) + 5) * 2000),
done: function() {
if (!$.firefly.settings._paused) {
$.firefly.fly(sp);
}
}
});
};
$.firefly.randomPixel = function(min, max) {
return Math.floor(Math.random()*(max-min+1)+min);
};
$.firefly.random = function(max) {
return Math.ceil(Math.random() * max) - 1;
};
$.firefly.opacity = function(min) {
op= Math.random();
if (op < min) {
return 0;
} else {
return 1;
}
};
})(jQuery);