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//
// CSS Linked Photo Shuffler v1.1 by
//   Carl Camera
//   http://iamacamera.org 
//
// SetOpacity Function and inpiration from Photo Fade by
//   Richard Rutter
//   http://clagnut.com
//
// License: Creative Commons Attribution 2.5  License
//   http://creativecommons.org/licenses/by/2.5/
//

// Customize your photo shuffle settings
// 
// * Surround the target <img /> with a <div>. specify id= in both
// * The first and final photo displayed is in the html <img> tag
// * The array contains paths to photos you want in the rotation. 
//   If you want the first photo in the rotation, then it's best to
//   put it as the final array image.  All photos must be same dimension
// * The rotations variable specifies how many times to repeat array.
//   images. zero is a valid rotation value.

var gblPhotoShufflerDivId = "photodiv";
var gblPhotoShufflerImgId = "photoimg";
var gblPhotoShufflerAnchorId = "photoanchor";
var gblImg = new Array(
	"asset/homepage/1_main_flower.jpg",
	"asset/homepage/2_main_hidden_memories.jpg",
	"asset/homepage/3_main_vase_black.jpg",
	"asset/homepage/4_main_shoe_tree.jpg",
	"asset/homepage/5_main_bar_stool.jpg",
	"asset/homepage/6_main_porcelain_lighting.jpg"
);
var gblHref = new Array(
	"Hanging Garden by <b>Patrick Morris</b>",
	"Hidden memories by <b>Angel HA</b>",
	"Vase black by <b>Kirsty Taylor</b>",
	"Shoe Tree by <b>Richard Doss</b>",
	"Bar Stool  by <b>Cath Carrol</b>",
	"Porcelain lighting by <b>Christine Archer</b>"
);
var gblPauseSeconds = 6;
var gblFadeSeconds = .85;
var gblRotations = 50;

// End Customization section
  
var gblDeckSize = gblImg.length;
var gblOpacity = 100;
var gblOnDeck = 0;
var gblStartImg;
var gblStartHref;
var gblImageRotations = gblDeckSize * (gblRotations+1);

window.onload = photoShufflerLaunch;
  
function photoShufflerLaunch(){
	var theimg = document.getElementById(gblPhotoShufflerImgId);
	gblStartImg = theimg.src; // save away to show as final image
	var theanchor = document.getElementById(gblPhotoShufflerAnchorId);
	gblStartHref = //theimg.href; // save away to show as final image

	document.getElementById(gblPhotoShufflerDivId).style.backgroundImage='url(' + gblImg[gblOnDeck] + ')';
	setTimeout("photoShufflerFade()",gblPauseSeconds*1000);
}

function photoShufflerFade(){
	var theimg = document.getElementById(gblPhotoShufflerImgId);
		
	// determine delta based on number of fade seconds
	// the slower the fade the more increments needed
	var fadeDelta = 100 / (30 * gblFadeSeconds);
	
	// fade top out to reveal bottom image
	if (gblOpacity < 2*fadeDelta ) {
		gblOpacity = 100;
	// stop the rotation if we're done
	if (gblImageRotations < 1) return;
		photoShufflerShuffle();
		// pause before next fade
		setTimeout("photoShufflerFade()",gblPauseSeconds*1000);
	}
	else
	{
		gblOpacity -= fadeDelta;
		setOpacity(theimg,gblOpacity);
		setTimeout("photoShufflerFade()",30);  // 1/30th of a second
	}
}

function photoShufflerShuffle(){
	var thediv = document.getElementById(gblPhotoShufflerDivId);
	var theimg = document.getElementById(gblPhotoShufflerImgId);
	var theanchor = document.getElementById(gblPhotoShufflerAnchorId);
		
	// copy div background-image to img.src
	theimg.src = gblImg[gblOnDeck];
	theanchor.innerHTML = gblHref[gblOnDeck]; //document.getElementById('myAnchor').innerHTML="Visit W3Schools"; 
	//window.status = gblHref[gblOnDeck]; // updates status bar (optional)
	// set img opacity to 100
	setOpacity(theimg,100);
	
	// shuffle the deck
	gblOnDeck = ++gblOnDeck % gblDeckSize;
	// decrement rotation counter
	if (--gblImageRotations < 1){
		// insert start/final image if we're done
		gblImg[gblOnDeck] = gblStartImg;
		gblHref[gblOnDeck] = gblStartHref;
	}

	// slide next image underneath
	thediv.style.backgroundImage='url(' + gblImg[gblOnDeck] + ')';
}

function setOpacity(obj, opacity) {
	opacity = (opacity == 100)?99.999:opacity;
	  
	// IE/Win
	obj.style.filter = "alpha(opacity:"+opacity+")";
	  
	// Safari<1.2, Konqueror
	obj.style.KHTMLOpacity = opacity/100;
	
	// Older Mozilla and Firefox
	obj.style.MozOpacity = opacity/100;
	
	// Safari 1.2, newer Firefox and Mozilla, CSS3
	obj.style.opacity = opacity/100;
}


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