/*
*
* Copyright (c) 2007 e-nova technologies pvt. ltd. (kevin.muller@enova-tech.net || http://www.enova-tech.net)
* Dual licensed under the MIT (http://www.opensource.org/licenses/mit-license.php)
* and GPL (http://www.opensource.org/licenses/gpl-license.php) licenses.
* __ ___ ___ __ __ __
* /'__`\ __ /' _ `\ / __`\ /\ \/\ \ /'__`\
* /\ __/ /\__\ /\ \/\ \ /\ \_\ \\ \ \_/ |/\ \_\.\_
* (o_ \ \____\ \/__/ \ \_\ \_\\ \____/ \ \___/ \ \__/.\_\ _o)
* (/)_ \/____/ \/_/\/_/ \/___/ \/__/ \/__/\/_/ _(\)
*
* Prevents Headaches !
*
* JMyCarousel is inspired and based on JCarouselLite, an original concept by Ganeshji Marwaha
*
*
* $LastChangedDate: 2007-06-22 20:08:34 -0500 (Thu, 22 Nov 2007) $
* $Rev: 15 $
*
* Version: 0.1
*/
(function ( $ ) { // Compliant with jquery.noConflict()
$.fn.jMyCarousel = function(o) {
o = $.extend({
btnPrev: null, // previous button customization
btnNext: null, // next button customization
mouseWheel: true, // shall the carousel handle the mousewheel event to animate ?
auto: false, // shall the carousel start automatically
speed: 500, // speed in ms of the animation.
easing: 'linear', // linear animation.
vertical: false, // set the carousel in a vertical mode
circular: true, // run in circular mode. Means : images never reach the end.
visible: '4', // size of the carousel on the screen. Can be in percent '100%', in pixels '100px', or in images '3' (for 3 images)
start: 0, // position in pixels that the carousel shall start at
scroll: 1,
step: 50, // value in pixels, or "default"
eltByElt: false, // if activated, the carousel will move image by image, not more, not less.
evtStart : 'mouseover', // start event that we want for the animation (click, mouseover, mousedown, etc..)
evtStop : 'mouseout', // stop event that we want for the animation (blur, mouseout, mouseup, etc..)
beforeStart: null, // Not used yet
afterEnd: null // Not used yet
}, o || {});
return this.each(function() { // Returns the element collection. Chainable.
var running = false, animCss=o.vertical?"top":"left", sizeCss=o.vertical?"height":"width";
var div = $(this), ul = $("ul", div), tLi = $("li", ul), tl = tLi.size(), v = o.visible;
var mousewheelN = 0; // will help for the mousewheel effect (to count how many steps we have to walk ahead)
var defaultBtn = (o.btnNext === null && o.btnPrev === null) ? true : false;
var cssU = (v.toString().indexOf("%") != -1 ? '%' : (v.toString().indexOf("px") != -1) ? 'px' : 'el');
var direction = null; // used to keep in memory in which direction the animation is moving
// circular mode management
// we add at the end and at the beginning some fake images to make the circular effect more linear, so it never breaks
// It is still possible to improve the memory management by adding exactly the number of images requested.
if(o.circular) {
var imgSet = tLi.clone();
ul.prepend(imgSet).append(imgSet.clone());
}
var li = $("li", ul); // list
div.css("visibility", "visible");
li.css("overflow", "hidden") // If the list item size is bigger than required
.css("float", o.vertical ? "none" : "left") // Horizontal list
.children().css("overflow", "hidden"); // If the item within li overflows its size, hide'em
if(!o.vertical){ li.css("display", "block"); } // IE double margin bug - rooo..
if(li.children().get(0).tagName.toLowerCase() == 'a' && !o.vertical){
li.children().css('float','left');
}
if(o.vertical && jQuery.browser.msie){ // Hack IE (again..) / purpose is to cancel the white space below the image when the carousel is in vertical mode
// The issue comes up when li is not in float:left. so we put it in float:left and adjust the size
li.css('line-height', '4px').children().css('margin-bottom', '-4px');
}
ul.css("margin", "0") // Browsers apply default margin
.css("padding", "0") // and padding. It is reset here.
.css("position", "relative") // IE BUG - width as min-width
.css("list-style-type", "none") // We dont need any icons representing each list item.
.css("z-index", "1"); // IE doesnt respect width. So z-index smaller than div
div.css("overflow", "hidden") // Overflows - works in FF
.css("position", "relative") // position relative and z-index for IE
.css("z-index", "2") // more than ul so that div displays on top of ul
.css("left", "0px"); // after creating carousel show it on screen
var liSize = o.vertical ? height(li) : width(li); // Full li size(incl margin)-Used for animation
var liSizeV = o.vertical ? elHeight(li) : height(li); // size of the main layer, in its side
var curr = o.start; // Current position in pixels
var nbAllElts = li.size(); // Total number of items
var ulSize = liSize * nbAllElts; // size of full ul(total length, not just for the visible items)
var nbElts = tl; // number of elements (only visible items)
var eltsSize = nbElts * liSize; // size of the visible elements only
var allEltsSize = nbAllElts * liSize; // Total size of the elements
//var jmcSize = jmcSize(); // Size of the carousel
var step = o.step == 'default' ? liSize : o.step; // step size
//debug("liSize=" + liSize + "; liSizeV=" + liSizeV + "; curr=" + curr + "; visible : " + liSize * v); // debug
o.btnPrev = defaultBtn ? $('') : $(o.btnPrev);
o.btnNext = defaultBtn ? $('') : $(o.btnNext);
var prev = o.btnPrev;
var next = o.btnNext;
/******* Buttons **********/
if(defaultBtn && o.auto !== true){ //Add buttons when necessary (In default mode and not auto)
prev.css({'opacity':'0.6'});
next.css({'opacity' :'0.6'});
div.prepend(prev);
div.prepend(next);
o.btnPrev = prev;
o.btnNext = next;
}
// Element by element management (eltBYElt = true)
if(o.eltByElt){
step = liSize; // the step size is necessarily the size of the element
if(o.start % liSize !== 0){ // If a start position was given and was not exactly positionned between 2 images
var imgStart = parseInt(o.start / liSize); // we adjust it
curr = o.start = (imgStart * liSize); // we set the starting position at a fixed point, between 2 images.
}
}
// Adjust the start position in case of circular mode
if(o.circular){
o.start += (liSize * tl); // The start position is one carousel length ahead due to the optical effect
curr += (liSize * tl); // used for the animation
}
// Calculates the size of the main div according to the given size (can be in percent, in value or in pixels)
var divSize, cssSize, cssUnity;
if(cssU == '%'){ // in percent
divSize = 0; // We don't have the value in pixels unless we set the percent value first. So 0, and will catch it later
cssSize = parseInt(v);
cssUnity = "%";
}
else if(cssU == 'px'){ // in pixels
divSize = parseInt(v);
cssSize = parseInt(v);
cssUnity = "px";
}
else{ // in elements (number of elements to display)
divSize = liSize * parseInt(v);
cssSize = liSize * parseInt(v);
cssUnity = "px";
}
// Adjust the carousel size with the correct values
//li.css("width", imgSize(li, 'width')) // inner li width. this is the box model width
//.css("height", imgSize(li), 'height'); // inner li height. this is the box model height
ul.css(sizeCss, ulSize + "px") // Width of the UL is the full length for all the images
.css(animCss, -(o.start)); // Set the starting item
div.css(sizeCss, cssSize + cssUnity); // Width of the DIV. length of visible images
if(o.vertical && cssUnity == '%'){ // Bugfix - % in vertical mode are badly handled by the browsers
var pxsize = ((liSize * nbElts) * (parseInt(v) / 100));
div.css(sizeCss, pxsize + 'px'); // The height of the carousel is based on the visible elements size
}
if(divSize === 0){ // We didn't have the size in pixels in case of % size. Catch up !
divSize = div.width(); // The size is simply the calculated size in pixels
}
// Adjust the height of the carousel (width in vertical mode)
if(o.vertical){ // vertical mode
div.css("width" , liSizeV + 'px');
ul.css("width", liSizeV + 'px');
li.css('margin-bottom', (parseInt(li.css('margin-bottom')) * 2) + 'px'); // bypass the "margin collapsing" effect by multiplying the margin-bottom by 2
li.eq(li.size() - 1).css('margin-bottom', li.css('margin-top')); // Last element has to be the right margin since no margin collapse there
}else{ // horizontal mode
div.css('height', liSizeV + 'px');
ul.css('height', liSizeV + 'px');
}
// Calculate the number of visible elements inside (in case of size in percent)
if(cssU == '%'){
v = divSize / li.width();
if(v % 1 !== 0){ v +=1; }
v = parseInt(v);
}
var divVSize = div.height(); // div height
////////////////////////
// Start / stop management //
////////////////////////
$.fn.jMyCarouselStart = function(o) {
return start();
}
$.fn.jMyCarouselStop = function(o) {
return stop();
}
////////////////////////
// Buttons management //
////////////////////////
if(defaultBtn){
next.css({'z-index':200, 'position':'absolute'});
prev.css({'z-index':200, 'position':'absolute'});
//Positionate the arrows and adjust the arrow images
if(o.vertical){
prev.css({'width': prev.width(), 'height' : prev.height(), 'top' : '0px', 'left': parseInt(liSizeV / 2) - parseInt(prev.width() / 2) + 'px'});
next.css({'width': prev.width(), 'height' : prev.height(), 'top' : (divVSize - prev.height()) + 'px', 'left' : parseInt(liSizeV / 2) - parseInt(prev.width() / 2) + 'px'});
}
else{
prev.css({'left':'0px', 'top': parseInt(liSizeV / 2) - parseInt(prev.height() / 2) + 'px'});
next.css({'right':'0px', 'top': parseInt(liSizeV / 2) - parseInt(prev.height() / 2) + 'px'});
}
}
// Bind the events with the "previous" button
if(o.btnPrev){
$(o.btnPrev).bind(o.evtStart, function() {
if(defaultBtn){ o.btnPrev.css('opacity',0.9); }
running = true;
direction = 'backward';
return backward();
});
$(o.btnPrev).bind(o.evtStop, function() {
if(defaultBtn){ o.btnPrev.css('opacity',0.6); }
running = false;
direction = null;
return stop();
});
}
// Bind the events with the "next" button
if(o.btnNext){
$(o.btnNext).bind(o.evtStart, function() {
if(defaultBtn){ o.btnNext.css('opacity',0.9); }
running = true;
direction = 'forward';
return forward();
});
$(o.btnNext).bind(o.evtStop,function() {
if(defaultBtn){ o.btnNext.css('opacity',0.6); }
running = false;
direction = null;
return stop();
});
}
// auto scroll management (auto = true). => launch the animation
if(o.auto === true){
start();
}
// Mousewheel management
if(o.mouseWheel && div.mousewheel){
div.mousewheel(function(e, d) {
if(!o.circular && (d > 0 ? (curr + divSize < ulSize) : (curr > 0)) || o.circular){ //prevents the mouse events to occur in case of circular mode
mousewheelN += 1; //one more step to do, store it.
if(running === false){
if(d > 0){ forward(step, true); }
else { backward(step, true); }
running = true;
}
}
});
}
function start(){
running = true;
forward();
}
/**
* Animate the track by moving it forward according to the step size and the speed
* @param stepsize, the size of the step (optional)
* @param once, shall the animation continue endlessly until we set running to false ? (optional)
*/
function forward(stepsize, once){
var s = (stepsize ? stepsize : step);
if(running === true && direction === "backward"){ return; }
//If not circular, no need to animate endlessly
if(!o.circular){
//will the next step overtake the last image ?
if(curr + s + (o.vertical ? divVSize : divSize) > eltsSize){
s = eltsSize - (curr + (o.vertical ? divVSize : divSize));
}
}
ul.animate(
animCss == "left" ? { left: -(curr + s) } : { top: -(curr + s) } , o.speed, o.easing,
function() {
curr += s; //Add step size
//Calculate whether we cross the limit,
//if so, put the carousel one time backward
if(o.circular){
if(curr + (o.vertical ? divVSize : divSize) + liSize >= allEltsSize){
ul.css(o.vertical ? 'top' : 'left', -curr + eltsSize);
curr -= eltsSize;
}
}
if(!once && running){
forward();
}
else if(once){
if(--mousewheelN > 0){
this.forward(step, true);
}
else{
running = false;
direction = null;
}
}
}
);
}
/**
* Animate the track by moving it backward according to the step size and the speed
* @param stepsize, the size of the step (optional)
* @param once, shall the animation continue endlessly until we set running to false ? (optional)
*/
function backward(stepsize, once){
var s = (stepsize ? stepsize : step);
if(running === true && direction === "forward"){ return; }
//If not circular, no need to animate endlessly
if(!o.circular){
//will the next step overtake the first image ?
if(curr - s < 0){
s = curr - 0;
}
}
ul.animate(
animCss == "left" ? { left: -(curr - s) } : { top: -(curr - s) } , o.speed, o.easing,
function() {
curr -= s;
//Calculate if we cross the limit,
//if so, put the carousel one time backward
if(o.circular){
if(curr <= liSize){
ul.css(o.vertical ? 'top' : 'left', -(curr + eltsSize));
curr += eltsSize;
}
}
if(!once && running){
backward();
}
else if(once){
if(--mousewheelN > 0){
backward(step, true);
}
else{
running = false;
direction = null;
}
}
}
);
}
/**
* Stops the animation
* Basically, tells the animation not to continue
*/
function stop(){
if(!o.eltByElt){ //If we don't move elements by elements, then we can stop immediately
ul.stop(); // stop the animation straight
curr = 0 - parseInt(ul.css(animCss)); // We stopped suddenly, so the curr variable is not refreshed. We refresh it with the true value
}
running = false; // default value and in case we proceed element by element (eltByElt = true)
direction = null;
}
/**
* Return the size of the carousel, everything included (height or length depending on o.vertical)
*/
/*function jmcSize(){
var img = $('ul li img', div);
var sizeLi = (o.vertical ? img.width() : img.height());
var elt = img;
while(elt.parent().get(0).tagName.toLowerCase() != 'div'){
sizeLi += (o.vertical ? (parseInt(elt.css('marginLeft')) + parseInt(elt.css('marginRight')) + parseInt(elt.css('paddingRight')) + parseInt(elt.css('paddingLeft'))) : (parseInt(elt.css('marginTop')) + parseInt(elt.css('marginBottom')) + parseInt(elt.css('paddingTop')) + parseInt(elt.css('paddingBottom'))));
elt = elt.parent();
}
return sizeLi;
}*/
/**
* Calculate and return the size of the image in the element
* @param el, the element
* @param dimension, 'width' or 'height'.
* @return the requested size in pixels.
*/
function imgSize(el, dimension){
if(dimension == 'width'){
return el.find('img').width();
}
else {
return el.find('img').height();
}
}
/**
* Size of an element li with its margin calculated from scratch (without any call to width except for the image size)
* usefull in case of vertical carousel, when the size of each element is 100%.
* @param el, the element
* @return the size of the element in pixels
*/
function elHeight(el){
var elImg = el.find('img');
if(o.vertical){
return parseInt(el.css('margin-left')) + parseInt(el.css('margin-right')) + parseInt(elImg.width()) + parseInt(el.css('border-left-width')) + parseInt(el.css('border-right-width')) + parseInt(el.css('padding-right')) + parseInt(el.css('padding-left'));
}
else{
return parseInt(el.css('margin-top')) + parseInt(el.css('margin-bottom')) + parseInt(elImg.width()) + parseInt(el.css('border-top-height')) + parseInt(el.css('border-bottom-height')) + parseInt(el.css('padding-top')) + parseInt(el.css('padding-bottom'));
}
}
function debug(html){
$('#debug').html($('#debug').html() + html + " ");
}
});
};
function css(el, prop) {
return parseInt($.css(el[0], prop)) || 0;
}
function width(el) {
return el[0].offsetWidth + css(el, 'marginLeft') + css(el, 'marginRight');
}
function height(el) {
return el[0].offsetHeight + css(el, 'marginTop') + css(el, 'marginBottom');
}
})(jQuery);