// -----------------------------------------------------------------------------------
//
// This page coded by Scott Upton
// http://www.uptonic.com | http://www.couloir.org
//
// This work is licensed under a Creative Commons License
// Attribution-ShareAlike 2.0
// http://creativecommons.org/licenses/by-sa/2.0/
//
// Associated APIs copyright their respective owners
//
// -----------------------------------------------------------------------------------
// --- version date: 11/28/05 --------------------------------------------------------


// get current photo id from URL
var thisURL = document.location.href;
var splitURL = thisURL.split("#");
var photoId = splitURL[1] - 1;

// if no photoId supplied then set default
var photoId = (!photoId)? 0 : photoId;
// CSS border size x 2
var borderSize = 10;
// Photo directory for this gallery
var photoDir = "photos/01/";
var zoomFactor=20; 
// Define each photo's name, height, width, and caption
var photoArray = new Array(
// Source, Width, Height, Caption
new Array("IMG_0470.jpg", "600", "450", "Cycling from Telluride to Moab"),
new Array("IMG_2441.jpg", "582", "350", "Mt. Toll as seen from the slopes of Mt. Audubon"),
new Array("IMG_2449.jpg", "600", "300", "Taking flight from the summit of Paiute"),
new Array("IMG_0677.jpg", "650", "488", "Plodding up Queen's Way Couloir on Apache"),
new Array("P3220073.jpg", "600", "400", "A storm brews in the distance (Red Rocks, NV)")
);

var w=0;
var h=0;
// Number of photos in this gallery
var photoNum = photoArray.length;

/*--------------------------------------------------------------------------*/

// Additional methods for Element added by SU, Couloir
Object.extend(Element, {
	getWidth: function(element) {
		element = $(element);
		return element.offsetWidth;
	},
	setWidth: function(element,w) {
		element = $(element);
		element.style.width = w +"px";
	},
	setHeight: function(element,h) {
		element = $(element);
		element.style.height = h +"px";
	},
	setSrc: function(element,src) {
		element = $(element);
		element.src = src;
	},
	setHref: function(element,href) {
		element = $(element);
		element.href = href;
	},
	setInnerHTML: function(element,content) {
		element = $(element);
		element.innerHTML = content;
	}
});

/*--------------------------------------------------------------------------*/

var Slideshow = Class.create();

Slideshow.prototype = {
	initialize: function(photoId) {
		this.photoId = photoId;
		this.photo = 'Photo';
		this.photoBox = 'Container';
		this.prevLink = 'PrevLink';
		this.nextLink = 'NextLink';
		this.captionBox = 'CaptionContainer';
		this.caption = 'Caption';
		this.counter = 'Counter';
		this.loader = 'Loading';
	},
	getCurrentSize: function() {
		// Get current height and width, subtracting CSS border size
		this.wCur = Element.getWidth(this.photoBox) - borderSize;
		this.hCur = Element.getHeight(this.photoBox) - borderSize;
	},
	getNewSize: function() {
		// Get current height and width
		this.wNew = photoArray[photoId][1];
		this.hNew = photoArray[photoId][2];
	},
	getNewSizeZI: function() {
		// Get current height and width
			w=this.wNew=this.wCur;
			h=this.hNew=this.hCur;
			var hNew1=this.hNew;
			var wNew2=this.wNew;
			var wNew1=parseInt(parseInt(wNew2) + parseInt((wNew2*zoomFactor)/100));			
			this.wNew=wNew1;
			this.hNew=(wNew1/wNew2)*hNew1;						
		
	},
	getNewSizeZO: function() {
		// Get current height and width
			w=this.wNew=this.wCur;
			h=this.hNew=this.hCur;
			var hNew1=this.hNew;
			var wNew2=this.wNew;
			var wNew1=parseInt(parseInt(wNew2) - parseInt((wNew2*zoomFactor)/100));
			this.wNew=wNew1;
			this.hNew=(wNew1/wNew2)*hNew1;		
	},
	getScaleFactor: function() {
		this.getCurrentSize();
		this.getNewSize();
		// Scalars based on change from old to new
		this.xScale = (this.wNew / this.wCur) * 100;
		this.yScale = (this.hNew / this.hCur) * 100;
		
		$(this.photo).style.width=parseInt(this.wNew)+"px";
		$(this.photo).style.height=parseInt(this.hNew)+"px";		
	},
	getScaleFactorZI: function() {
		this.getCurrentSize();
		this.getNewSizeZI();
		// Scalars based on change from old to new
		this.xScale = (this.wNew / this.wCur) * 100;
		this.yScale = (this.hNew / this.hCur) * 100;
		
		$(this.photo).style.width=parseInt(this.wNew)+"px";
		$(this.photo).style.height=parseInt(this.hNew)+"px";		
	},	
	getScaleFactorZO: function() {
		this.getCurrentSize();
		this.getNewSizeZO();
		// Scalars based on change from old to new
		this.xScale = (this.wNew / this.wCur) * 100;
		this.yScale = (this.hNew / this.hCur) * 100;
		
		$(this.photo).style.width=parseInt(this.wNew)+"px";
		$(this.photo).style.height=parseInt(this.hNew)+"px";		
	},
	setNewPhotoParams: function() {
		// Set source of new image
		Element.setSrc(this.photo,photoDir + photoArray[photoId][0]);
		// Set anchor for bookmarking
		Element.setHref(this.prevLink, "#" + (photoId+1));
		Element.setHref(this.nextLink, "#" + (photoId+1));		
	},
	setPhotoCaption: function() {
		// Add caption from gallery array
		Element.setInnerHTML(this.caption,photoArray[photoId][3]);
		Element.setInnerHTML(this.counter,((photoId+1)+'/'+photoNum));
	},
	resizePhotoBox: function() {
		this.getScaleFactor();
		new Effect.Scale(this.photoBox, this.yScale, {scaleX: false, duration: 0.3, queue: 'front'});
		new Effect.Scale(this.photoBox, this.xScale, {scaleY: false, delay: 0.5, duration: 0.3});
		// Dynamically resize caption box as well
		Element.setWidth(this.captionBox,this.wNew-(-borderSize));		
	},
	resizePhotoBoxZI: function() {
		this.getScaleFactorZI();
		new Effect.Scale(this.photoBox, this.yScale, {scaleX: false, duration: 0.3, queue: 'front'});
		new Effect.Scale(this.photoBox, this.xScale, {scaleY: false, delay: 0.5, duration: 0.3});
		// Dynamically resize caption box as well
		Element.setWidth(this.captionBox,this.wNew-(-borderSize));		
	},
	resizePhotoBoxZO: function() {
		this.getScaleFactorZO();
		new Effect.Scale(this.photoBox, this.yScale, {scaleX: false, duration: 0.3, queue: 'front'});
		new Effect.Scale(this.photoBox, this.xScale, {scaleY: false, delay: 0.5, duration: 0.3});
		// Dynamically resize caption box as well
		Element.setWidth(this.captionBox,this.wNew-(-borderSize));		
	},
	showPhoto: function(){
		new Effect.Fade(this.loader, {delay: 0.5, duration: 0.3});
		// Workaround for problems calling object method "afterFinish"
		new Effect.Appear(this.photo, {duration: 0.5, queue: 'end', afterFinish: function(){Element.show('CaptionContainer');Element.show('PrevLink');Element.show('NextLink');}});
	},
	nextPhoto: function(){
		// Figure out which photo is next
		(photoId == (photoArray.length - 1)) ? photoId = 0 : photoId++;
		this.initSwap();
	},
	prevPhoto: function(){
		// Figure out which photo is previous
		(photoId == 0) ? photoId = photoArray.length - 1 : photoId--;
		this.initSwap();
	},
	initSwap: function() {
		// Begin by hiding main elements
		Element.show(this.loader);
		Element.hide(this.photo);
		Element.hide(this.captionBox);
		Element.hide(this.prevLink);
		Element.hide(this.nextLink);
		// Set new dimensions and source, then resize
		this.setNewPhotoParams();
		this.resizePhotoBox();
		this.setPhotoCaption();
	},
	zoomin: function() {
		// Begin by hiding main elements
		Element.show(this.loader);
		Element.hide(this.photo);
		Element.hide(this.captionBox);
		Element.hide(this.prevLink);
		Element.hide(this.nextLink);
		// Set new dimensions and source, then resize
		this.setNewPhotoParams();
		this.resizePhotoBoxZI();
		this.setPhotoCaption();
	},
	zoomout: function() {
		// Begin by hiding main elements
		Element.show(this.loader);
		Element.hide(this.photo);
		Element.hide(this.captionBox);
		Element.hide(this.prevLink);
		Element.hide(this.nextLink);
		// Set new dimensions and source, then resize
		this.setNewPhotoParams();
		this.resizePhotoBoxZO();
		this.setPhotoCaption();
	}
}

/*--------------------------------------------------------------------------*/

// Establish CSS-driven events via Behaviour script
var myrules = {
'#Photo' : function(element){
	element.onload = function(){
		var myPhoto = new Slideshow(photoId);
		myPhoto.showPhoto();
	}
},
'#PrevLink' : function(element){
	element.onmouseover = function(){
		soundManager.play('beep');
	}
	element.onclick = function(){
		var myPhoto = new Slideshow(photoId);
		myPhoto.prevPhoto();
		soundManager.play('select');
	}
},
'#NextLink' : function(element){
	element.onmouseover = function(){
		soundManager.play('beep');
	}
	element.onclick = function(){
		var myPhoto = new Slideshow(photoId);
		myPhoto.nextPhoto();
		soundManager.play('select');
	}
},
a : function(element){
	element.onfocus = function(){
		this.blur();
	}
}
};

// Add window.onload event to initialize
Behaviour.addLoadEvent(init);
Behaviour.apply();
function init() {
	var myPhoto = new Slideshow(photoId);
	myPhoto.initSwap();
	soundManagerInit();
}