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/*
* jQuery jSlots Plugin
* http://matthewlein.com/jslot/
* Copyright (c) 2011 Matthew Lein
* Version: 1.0.2 (7/26/2012)
* Dual licensed under the MIT and GPL licenses
* Requires: jQuery v1.4.1 or later
*/
(function($){
$.jSlots = function(el, options){
var base = this;
base.$el = $(el);
base.el = el;
base.$el.data("jSlots", base);
base.init = function() {
base.options = $.extend({},$.jSlots.defaultOptions, options);
base.setup();
base.bindEvents();
};
// --------------------------------------------------------------------- //
// DEFAULT OPTIONS
// --------------------------------------------------------------------- //
$.jSlots.defaultOptions = {
number : 3, // Number: number of slots
winnerNumber : 1, // Number or Array: list item number(s) upon which to trigger a win, 1-based index, NOT ZERO-BASED
spinner : '', // CSS Selector: element to bind the start event to
spinEvent : 'click', // String: event to start slots on this event
onStart : $.noop, // Function: runs on spin start,
onEnd : $.noop, // Function: run on spin end. It is passed (finalNumbers:Array). finalNumbers gives the index of the li each slot stopped on in order.
onWin : $.noop, // Function: run on winning number. It is passed (winCount:Number, winners:Array)
easing : 'swing', // String: easing type for final spin
time : 7000, // Number: total time of spin animation
loops : 6 // Number: times it will spin during the animation
};
// --------------------------------------------------------------------- //
// HELPERS
// --------------------------------------------------------------------- //
base.randomRange = function(low, high) {
return Math.floor( Math.random() * (1 + high - low) ) + low;
};
// --------------------------------------------------------------------- //
// VARS
// --------------------------------------------------------------------- //
base.isSpinning = false;
base.spinSpeed = 0;
base.winCount = 0;
base.doneCount = 0;
base.$liHeight = 0;
base.$liWidth = 0;
base.winners = [];
base.allSlots = [];
// --------------------------------------------------------------------- //
// FUNCTIONS
// --------------------------------------------------------------------- //
base.setup = function() {
// set sizes
var $list = base.$el;
var $li = $list.find('li').first();
base.$liHeight = $li.outerHeight();
base.$liWidth = $li.outerWidth();
base.liCount = base.$el.children().length;
base.listHeight = base.$liHeight * base.liCount;
base.increment = (base.options.time / base.options.loops) / base.options.loops;
$list.css('position', 'relative');
$li.clone().appendTo($list);
base.$wrapper = $list.wrap('<div class="jSlots-wrapper"></div>').parent();
// remove original, so it can be recreated as a Slot
base.$el.remove();
// clone lists
for (var i = base.options.number - 1; i >= 0; i--){
base.allSlots.push( new base.Slot() );
}
};
base.bindEvents = function() {
$(base.options.spinner).bind(base.options.spinEvent, function(event) {
if (!base.isSpinning) {
base.playSlots();
}
});
};
// Slot contstructor
base.Slot = function() {
this.spinSpeed = 0;
this.el = base.$el.clone().appendTo(base.$wrapper)[0];
this.$el = $(this.el);
this.loopCount = 0;
this.number = 0;
};
base.Slot.prototype = {
// do one rotation
spinEm : function() {
var that = this;
that.$el
.css( 'top', -base.listHeight )
.animate( { 'top' : '0px' }, that.spinSpeed, 'linear', function() {
that.lowerSpeed();
});
},
lowerSpeed : function() {
this.spinSpeed += base.increment;
this.loopCount++;
if ( this.loopCount < base.options.loops ) {
this.spinEm();
} else {
this.finish();
}
},
// final rotation
finish : function() {
var that = this;
var endNum = base.randomRange( 1, base.liCount );
var finalPos = - ( (base.$liHeight * endNum) - base.$liHeight );
var finalSpeed = ( (this.spinSpeed * 0.5) * (base.liCount) ) / endNum;
that.$el
.css( 'top', -base.listHeight )
.animate( {'top': finalPos}, finalSpeed, base.options.easing, function() {
base.checkWinner(endNum, that);
});
}
};
base.checkWinner = function(endNum, slot) {
base.doneCount++;
// set the slot number to whatever it ended on
slot.number = endNum;
// if its in the winners array
if (
( $.isArray( base.options.winnerNumber ) && base.options.winnerNumber.indexOf(endNum) > -1 ) ||
endNum === base.options.winnerNumber
) {
// its a winner!
base.winCount++;
base.winners.push(slot.$el);
}
if (base.doneCount === base.options.number) {
var finalNumbers = [];
$.each(base.allSlots, function(index, val) {
finalNumbers[index] = val.number;
});
if ( $.isFunction( base.options.onEnd ) ) {
base.options.onEnd(finalNumbers);
}
if ( base.winCount && $.isFunction(base.options.onWin) ) {
base.options.onWin(base.winCount, base.winners, finalNumbers);
}
base.isSpinning = false;
}
};
base.playSlots = function() {
base.isSpinning = true;
base.winCount = 0;
base.doneCount = 0;
base.winners = [];
if ( $.isFunction(base.options.onStart) ) {
base.options.onStart();
}
$.each(base.allSlots, function(index, val) {
this.spinSpeed = 0;
this.loopCount = 0;
this.spinEm();
});
};
base.onWin = function() {
if ( $.isFunction(base.options.onWin) ) {
base.options.onWin();
}
};
// Run initializer
base.init();
};
// --------------------------------------------------------------------- //
// JQUERY FN
// --------------------------------------------------------------------- //
$.fn.jSlots = function(options){
if (this.length) {
return this.each(function(){
(new $.jSlots(this, options));
});
}
};
})(jQuery);