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/**
* Slideshow Lite plugin for jQuery
*
* v0.5.3
*
* Copyright (c) 2009 Fred Wu
*
* Dual licensed under the MIT and GPL licenses:
* http://www.opensource.org/licenses/mit-license.php
* http://www.gnu.org/licenses/gpl.html
*/
/**
* Configuration options:
*
* pauseSeconds float number of seconds between each photo to be displayed
* fadeSpeed float number of seconds for the fading transition, the value should not exceed 'pauseSeconds'
* width integer width of the slideshow, in pixels
* height integer height of the slideshow, in pixels
* caption boolean display photo caption?
* cssClass string name of the CSS class, defaults to 'slideshowlite'
*/
(function($){
$.fn.slideshow = function(options){
var defaults = {
pauseSeconds: 8,
fadeSpeed: 0.5,
width: 495,
height: 230,
caption: true,
cssClass: 'slideshowlite'
};
var options = $.extend(defaults, options);
// ----------------------------------------
// slideshow objects and variables
// ----------------------------------------
var target = this;
var items = $(target).children("a");
var instance;
// ----------------------------------------
// some mandontory styling
// ----------------------------------------
if ( ! $(this).hasClass(options.cssClass)) $(this).addClass(options.cssClass);
$(this).css({
width: options.width + "px",
height: options.height + "px"
});
// ----------------------------------------
// create anchor links to make the structure simpler for manupilation
// ----------------------------------------
$(this).children("img").wrap(document.createElement("a"));
$(this).children("a").attr("target", "blank");
// ----------------------------------------
// add item sequence markups
// ----------------------------------------
var i = 1;
$(this).children("a").each(function(){
$(this).attr("rel", i++);
});
// ----------------------------------------
// create pagination and caption
// ----------------------------------------
$(this).append("<ul></ul>");
$(this).append("<ol></ol>");
var pagination = $(this).children("ul");
var caption = $(this).children("ol");
var i = 1;
var j = 0;
$(this).children("a").each(function(){
pagination.append("<li><a href=\"#\">" + i++ + "</a></li>");
caption.append("<li>" + $("#" + $(target).attr("id") + " img:nth(" + j++ + ")").attr("alt") + "</li>");
});
pagination.fadeTo(0, 1);
caption.fadeTo(0, 0.6);
caption.hide();
// ----------------------------------------
// shortcuts
// ----------------------------------------
var firstItem = $(target).children("a:first");
var lastItem = $(target).children("a:last");
var currentItem = firstItem;
// ----------------------------------------
// pagination highlight
// ----------------------------------------
var paginationHighlight = function(sequence){
pagination.children("li").children("a").removeClass("current");
pagination.children("li").children("a:nth(" + sequence + ")").addClass("current");
}
// ----------------------------------------
// caption
// ----------------------------------------
var showCaption = function(sequence){
caption.show();
caption.children("li").hide();
caption.children("li:nth(" + sequence + ")").fadeIn();
}
// ----------------------------------------
// slideshow logic
// ----------------------------------------
var makeSlideshow = function(){
// pagination click
pagination.children("li").children("a").click(function(){
if ( ! $(this).hasClass("current"))
{
// select the current item after the pagination click
currentItem = $(target).children("a:nth(" + ($(this).text()-1) + ")");
currentItem.show();
startSlideshow();
}
});
// pagination highlight
paginationHighlight(currentItem.attr("rel")-1);
// show caption
if (options.caption == true)
{
showCaption(currentItem.attr("rel")-1);
}
// show the current slide
currentItem.fadeIn(options.fadeSpeed*1000, function(){
$(target).children("a").hide();
$(this).show().css("z-index", 1);
});
// prepare for the next slide
// determines the next item (or we need to rewind to the first item?)
if (currentItem.children("img").attr("src") == lastItem.children("img").attr("src"))
{
currentItem = firstItem;
currentItem.css("z-index", 2);
}
else
{
currentItem = currentItem.next();
}
};
var startSlideshow = function(){
clearInterval(instance);
makeSlideshow();
instance = setInterval(makeSlideshow, options.pauseSeconds*1000);
};
// ----------------------------------------
// start the slideshow!
// ----------------------------------------
startSlideshow();
};
})(jQuery);
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