//
// CSS Photo Shuffler v1.0 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 with a
. specify id= in both
// * set background-repeat:no-repeat in CSS for the div
// * The first and final photo displayed is in the html
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 = "screenshot-slide";
var gblPhotoShufflerImgId = "screenshot-slide-image";
var gblRotations = 40;
var gblFPS = 20;
// End Customization section
var gblOpacity = 100;
var gblOnDeck = 0;
var gblStartImg;
function photoShufflerLaunch()
{
var theimg = document.getElementById(gblPhotoShufflerImgId);
gblStartImg = theimg.src; // 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 / (gblFPS * 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()",1000/gblFPS);
}
}
var finished = false;
function photoShufflerShuffle()
{
var thediv = document.getElementById(gblPhotoShufflerDivId);
var theimg = document.getElementById(gblPhotoShufflerImgId);
// copy div background-image to img.src
theimg.src = gblImg[gblOnDeck];
// set img opacity to 100
setOpacity(theimg,100);
// shuffle the deck
gblOnDeck = ++gblOnDeck % gblDeckSize;
// decrement rotation counter
if (--gblImageRotations < 1) {
finished = true;
// insert start/final image if we're done
gblImg[gblOnDeck] = gblStartImg;
}
// slide next image underneath
thediv.style.backgroundImage='url(' + gblImg[gblOnDeck] + ')';
}
function setOpacity(obj, opacity)
{
if (finished)
return;
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;
}