(function($) {
$.fn.simplyScroll = function(o) {
return this.each(function() {
new $.simplyScroll(this,o);
});
};
var defaults = {
className: 'simply-scroll',
frameRate: 24, //No of movements per second
speed: 1, //No of pixels per frame
horizontal: false,
autoMode: 'off', //disables buttons 'loop','bounce'
pauseOnHover: true,
startOnLoad: true, //use this if having rendering problems (safari 3 + Mac OSX?)
localJsonSource: '', //format [{"src":"images/pic.jpg","title":"title","link":"http://"},{etc..}]
flickrFeed: '',
jsonImgWidth: 240,
jsonImgHeight: 180
};
$.simplyScroll = function(el,o) {
var self = this;
this.o = $.extend({}, defaults, o || {});
this.auto = this.o.autoMode!=="off" ? true : false;
//called on ul/ol/div etc
this.$list = $(el);
//generate extra markup
this.$list.addClass('simply-scroll-list')
.wrap('<div class="simply-scroll-clip"></div>')
.parent().wrap('<div class="' + this.o.className + ' simply-scroll-container"></div>');
if (!this.o.auto) { //button placeholders
this.$list.parent().parent()
.prepend('<div class="simply-scroll-forward"></div>')
.prepend('<div class="simply-scroll-back"></div>');
}
//load image data
if (this.o.flickrFeed) {
$.getJSON(this.o.flickrFeed + "&format=json&jsoncallback=?",
function(data) {
json = [];
$.each(data.items, function(i,item) {
json.push({
"src": item.media.m,
"title": item.title,
"link": item.link
});
});
self.renderData(json);
}
);
} else if (this.o.localJsonSource) {
$.getJSON(this.o.localJsonSource,
function(json) {
self.renderData(json);
}
);
} else {
if (!this.o.startOnLoad) {
this.init();
} else {
//wait for load before completing setup
$(window).load(function() { self.init(); });
}
}
};
$.simplyScroll.fn = $.simplyScroll.prototype = {};
$.simplyScroll.fn.extend = $.simplyScroll.extend = $.extend;
$.simplyScroll.fn.extend({
init: function() {
//shortcuts
this.$items = this.$list.children();
this.$clip = this.$list.parent();
this.$container = this.$clip.parent();
if (!this.o.horizontal) {
this.itemMax = this.$items[0].offsetHeight; //this.$items[0].offsetHeight;
this.clipMax = this.$clip.height(); //this.$clip[0].offsetHeight;
this.dimension = 'height';
this.moveBackClass = 'simply-scroll-btn-up';
this.moveForwardClass = 'simply-scroll-btn-down';
} else {
this.itemMax = this.$items[0].offsetWidth;
this.clipMax = this.$clip.width();
this.dimension = 'width';
this.moveBackClass = 'simply-scroll-btn-left';
this.moveForwardClass = 'simply-scroll-btn-right';
}
this.posMin = 0;
this.posMax = this.$items.length * this.itemMax;
this.$list.css(this.dimension,this.posMax +'px');
if (this.o.autoMode=='loop') {
var addItems = Math.ceil(this.clipMax / this.itemMax);
this.$items.slice(0,addItems).clone(true).appendTo(this.$list);
this.posMax += (this.clipMax - this.o.speed);
this.$list.css(this.dimension,this.posMax+(this.itemMax*addItems) +'px');
}
this.interval = null;
this.intervalDelay = Math.floor(1000 / this.o.frameRate);
//ensure that speed is divisible by item width
while (this.itemMax % this.o.speed !== 0) {
this.o.speed--;
if (this.o.speed===0) {
this.o.speed=1; break;
}
}
var self = this;
this.trigger = null;
this.funcMoveBack = function() { self.trigger=this;self.moveBack(); };
this.funcMoveForward = function() { self.trigger=this;self.moveForward(); };
this.funcMoveStop = function() { self.moveStop(); };
this.funcMoveResume = function() { self.moveResume(); };
if (this.auto) {
if (this.o.pauseOnHover) {
this.$clip.hover(this.funcMoveStop,this.funcMoveResume);
}
this.moveForward();
} else {
this.$btnBack = $('.simply-scroll-back',this.$container)
.addClass('simply-scroll-btn' + ' ' + this.moveBackClass + ' ' + 'disabled')
.hover(this.funcMoveBack,this.funcMoveStop);
this.$btnForward = $('.simply-scroll-forward',this.$container)
.addClass('simply-scroll-btn' + ' ' + this.moveForwardClass)
.hover(this.funcMoveForward,this.funcMoveStop);
}
},
moveForward: function() {
var self = this;
this.movement = 'forward';
if (this.trigger !== null) {
this.$btnBack.removeClass('disabled');
}
self.interval = setInterval(function() {
if (!self.o.horizontal && self.$clip[0].scrollTop < (self.posMax-self.clipMax)) {
self.$clip[0].scrollTop += self.o.speed;
} else if (self.o.horizontal && self.$clip[0].scrollLeft < (self.posMax-self.clipMax)) {
self.$clip[0].scrollLeft += self.o.speed;
} else if (self.o.autoMode=='loop') {
self.resetPos();
} else {
self.moveStop(self.movement);
}
},self.intervalDelay);
},
moveBack: function() {
var self = this;
this.movement = 'back';
if (this.trigger !== null) {
this.$btnForward.removeClass('disabled');
}
self.interval = setInterval(function() {
if (!self.o.horizontal && self.$clip[0].scrollTop>0) {
self.$clip[0].scrollTop -= self.o.speed;
} else if (self.o.horizontal && self.$clip[0].scrollLeft>0) {
self.$clip[0].scrollLeft -= self.o.speed;
} else if (self.o.autoMode=='loop') {
self.resetPos();
} else {
self.moveStop(self.movement);
}
},self.intervalDelay);
},
moveStop: function(moveDir) {
clearInterval(this.interval);
if (this.trigger!==null) {
if (typeof moveDir != "undefined") {
$(this.trigger).addClass('disabled');
}
this.trigger = null;
}
if (this.auto) {
if (this.o.autoMode=='bounce') {
moveDir == 'forward' ? this.moveBack() : this.moveForward();
}
}
},
moveResume: function() {
this.movement=='forward' ? this.moveForward() : this.moveBack();
},
resetPos: function() {
if (!this.o.horizontal) {
this.$clip[0].scrollTop = 0;
} else {
this.$clip[0].scrollLeft = 0;
}
},
renderData: function(json) {
if (json.length>0) { //render json data
var self = this;
$.each(json, function(i,item) {
$("<img/>").attr({
src: item.src,
title: item.title,
alt: item.title,
width: self.o.jsonImgWidth,
height: self.o.jsonImgHeight
}).appendTo(self.$list);
});
this.init();
}
}
});
})(jQuery);
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