/*    8/14/2009
PikaChoose
Jquery plugin for photo galleries
    Copyright (C) 2009 Jeremy Fry
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/
/* thanks to Antonio Terceiro for suggestion and implementation of the multi lang support*/
jQuery.iPikaChoose = {
build : function(user_options)
{
var user_options;
var defaults = {
show_captions: true,
slide_enabled: true,
auto_play: true,
show_prev_next: true,
slide_speed: 5000,
thumb_width: 77,
thumb_height: 100,
buttons_text: { play: "Play", stop: "Stop", previous: "Previous", next: "Next" },
delay_caption: true,
user_thumbs: false
};
return jQuery(this).each(
function() {
//bring in options
var options = jQuery.extend(defaults, user_options);
// grab our images
var images = jQuery(this).children('li').children('img');
//hide the images so the user doesn't see crap
images.fadeOut(1);
//save our list for future ref
var ulist = jQuery(this);
images.each(LoadImages);
//start building structure
jQuery(this).before("<div class='pika_main'></div>");
// houses eveything about the UL
var main_div = jQuery(this).prev(".pika_main");
//add in slideshow elements when appropriate
if(options.slide_enabled){
main_div.append("<div class='pika_play'></div>");
var play_div = jQuery(this).prev(".pika_main").children(".pika_play");
play_div.html("<a class='pika_play_button'>" + options.buttons_text.play + "</a><a class='pika_stop_button'>" + options.buttons_text.stop + "</a>");
play_div.fadeOut(1);
var play_anchor = play_div.children('a:first');
var stop_anchor = play_div.children('a:last');
}
//this div is used to make image and caption fade together
main_div.append("<div class='pika_subdiv'></div>");
var sub_div = main_div.children(".pika_subdiv");
//the main image we'll be using to load
sub_div.append("<img />");
var main_img = sub_div.children("img");
//create the caption div when appropriate
if(options.show_captions){
sub_div.append("<div class='pika_caption'></div>");
var caption_div = sub_div.children(".pika_caption");
}
//navigation div ALWAYS gets created, its refrenced a lot				
jQuery(this).after("<div class='pika_navigation'></div>");
var navigation_div = jQuery(this).next(".pika_navigation");
//fill in sub elements
navigation_div.prepend("<a>" + options.buttons_text.previous + "</a> :: <a>" + options.buttons_text.next + "</a>");
var previous_image_anchor = navigation_div.children('a:first');
var next_image_anchor = navigation_div.children('a:last');
//hide the navigation if the user doesn't want it
if(!options.show_prev_next){
navigation_div.css("display","none");
}
//playing triggers the loop for the slideshow
var playing = options.auto_play;
main_img.wrap("<a></a>");
var main_link = main_img.parent("a");
function LoadImages()
{
jQuery(this).bind("load", function()
{
//had to make a seperate function so that the thumbnails wouldn't have problems
//from beings resized before loaded, thus not h/w
//delete hidden image to clean up things.
jQuery(this).next('img').remove();
var w = jQuery(this).width();
var h = jQuery(this).height();
if(w===0){w = jQuery(this).attr("width");}
if(h===0){h = jQuery(this).attr("height");}
//grab a ratio for image to user defined settings
var rw = options.thumb_width/w;
var rh = options.thumb_height/h;
//determine which has the smallest ratio (thus needing
//to be the side we use to scale so our whole thumb is filled)
if(rw<rh){
//we'll use ratio later to scale and not distort
var ratio = rh;
var left = ((w*ratio-options.thumb_width)/2)*-1;
left = Math.round(left);
//set images left offset to match
jQuery(this).css({left:left});
}else{
var ratio = rw;
//you can uncoment this lines to have the vertical picture centered
//but usually tall photos have the focal point at the top...
//var top = ((h*ratio-options.thumb_height)/2)*-1;
//var top = Math.round(top);
var top = 0;
jQuery(this).css({top:top});
}
//use those ratios to calculate scale
var width = Math.round(w*ratio);
var height = Math.round(h*ratio);
jQuery(this).css("position","relative");
jQuery(this).width(width).height(height);
var imgcss={
width: width,
height: height
};
jQuery(this).css(imgcss);					
jQuery(this).hover(
function(){jQuery(this).fadeTo(250,1);},
function(){if(!jQuery(this).hasClass("pika_selected")){jQuery(this).fadeTo(250,0.4);}}
);
jQuery(this).fadeTo(250,0.4);	
if(jQuery(this).hasClass('pika_first')){
jQuery(this).trigger("click",["auto"]);
}
});
//clone so the on loads will fire correctly
var newImage = jQuery(this).clone(true).insertBefore(this);
jQuery(this).hide();
//reset images to the clones
images = ulist.children('li').children('img');
}
function activate()
{
//sets the intial phase for everything
//image_click is controls the fading
images.bind("click",image_click);
//hiding refrence to slide elements if slide is disabled
if(options.slide_enabled){
if(options.auto_play){
playing = true;
play_anchor.hide();
stop_anchor.show();
}else{
play_anchor.show();
stop_anchor.hide();
}
}
images.filter(":last").addClass("pika_last");
images.filter(":first").addClass("pika_first");
//css for the list
var licss = {
width: options.thumb_width+"px",
height: options.thumb_height+"px",
"list-style": "none",
overflow: "hidden"
};
images.each(function(){
jQuery(this).parent('li').css(licss);
//fixes a bug where images don't get the correct display after loading
if(jQuery(this).attr('complete')==true && jQuery(this).css('display')=="none")
{
jQuery(this).css({display:'inline'});
}
});
//previous link to go back an image
previous_image_anchor.bind("click",previous_image);
//ditto for forward, also the item that gets auto clicked for slideshow
next_image_anchor.bind("click",next_image);	
}//end activate function
function image_click(event, how){
//catch when user clicks on an image Then cancel current slideshow
if(how!="auto"){
if(options.slide_enabled){
stop_anchor.hide();
play_anchor.show();
playing=false;
}
main_img.stop();
main_img.dequeue();
if(options.show_captions)
{
caption_div.stop();
caption_div.dequeue();
}
}
//all our image variables
if(options.user_thumbs)
{		
var image_source = jQuery(this).attr("ref");
}else
{
var image_source = jQuery(this).attr("src");
}
var image_link = jQuery(this).attr("ref");
var image_caption = jQuery(this).next("span").html();
//fade out the old thumb
images.filter(".pika_selected").fadeTo(250,0.4); 
images.filter(".pika_selected").removeClass("pika_selected"); 
//fade in the new thumb
jQuery(this).fadeTo(250,1);
jQuery(this).addClass("pika_selected");
//fade the old image out and the new one in
if(options.show_captions)
{
if(options.delay_caption)
{
caption_div.fadeTo(800,0);
}
caption_div.fadeTo(500,0,function(){
caption_div.html(image_caption);
caption_div.fadeTo(800,1);
});
}
main_img.fadeTo(500,0.00,function(){
//make the image fade in on load, which should hopefully get rid of any jumping
main_img.unbind('load');
main_img.bind('load',function()
 						{
main_img.fadeTo(800,1,function(){
if(playing){
jQuery(this).animate({top:0},options.slide_speed, function(){
//redudency needed here to catch the user clicking on an image during a change.
if(playing){next_image_anchor.trigger("click",["auto"]);}
});
}
});
});
main_img.attr("src",image_source);
main_link.attr("href", image_link);
});
}//end image_click function
function next_image(event, how){
if(images.filter(".pika_selected").hasClass("pika_last")){
images.filter(":first").trigger("click",how);
}else{
images.filter(".pika_selected").parent('li').next('li').children('img').trigger("click",how);
}
}//end next image function
function previous_image(event, how){
if(images.filter(".pika_selected").hasClass("pika_first")){
images.filter(":last").trigger("click",how);
}else{
images.filter(".pika_selected").parent('li').prev('li').children('img').trigger("click",how);
}
}//end previous image function
function play_button(){
main_div.hover(
function(){play_div.fadeIn(400);},
function(){play_div.fadeOut(400);}
);
play_anchor.bind("click", function(){
main_img.stop();
main_img.dequeue();
if(options.show_captions)
{
caption_div.stop();
caption_div.dequeue();
}
playing = true;
next_image_anchor.trigger("click",["auto"]);
jQuery(this).hide();
stop_anchor.show();
});
stop_anchor.bind("click", function(){
playing = false;
jQuery(this).hide();
play_anchor.show();
});
}
if(options.slide_enabled){play_button();}
activate();
});//end return this.each
}//end build function
//activate applies the appropriate actions to all the different parts of the structure.
//and loads the sets the first image
};//end jquery.ipikachoose		
jQuery.fn.PikaChoose = jQuery.iPikaChoose.build;