Team:UC Davis/Gallery

From 2011.igem.org

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<script type="text/javascript" src="http://www.huddletogether.com/projects/lightbox/lightbox.js"></script>
 
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<style>
 
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#lightbox{
 
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background-color:#000000;
 
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padding: 10px;
 
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border-bottom: 2px solid #666;
 
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border-right: 2px solid #666;
 
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}
 
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#lightboxDetails{
 
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font-size: 0.8em;
 
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padding-top: 0.4em;
 
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}
 
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#lightboxCaption{ float: left; }
 
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#keyboardMsg{ float: right; }
 
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#closeButton{ top: 5px; right: 5px; }
 
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#lightbox img{ border: none; clear: both;}
 
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#overlay img{ border: none; }
 
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#overlay{ background-image: url(overlay.png); }
 
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* html #overlay{
 
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background-color: #575757;
 
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back\ground-color: transparent;
 
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background-image: url(blank.gif);
 
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filter: progid:DXImageTransform.Microsoft.AlphaImageLoader(src="overlay.png", sizingMethod="scale");
 
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Revision as of 22:42, 25 August 2011

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/* Lightbox JS: Fullsize Image Overlays by Lokesh Dhakar - http://www.huddletogether.com

For more information on this script, visit: http://huddletogether.com/projects/lightbox/

Licensed under the Creative Commons Attribution 2.5 License - http://creativecommons.org/licenses/by/2.5/ (basically, do anything you want, just leave my name and link)

Table of Contents ----------------- Configuration

Functions - getPageScroll() - getPageSize() - pause() - getKey() - listenKey() - showLightbox() - hideLightbox() - initLightbox() - addLoadEvent()

Function Calls - addLoadEvent(initLightbox)

  • /


// // Configuration //

// If you would like to use a custom loading image or close button reference them in the next two lines. var loadingImage = 'loading.gif'; var closeButton = 'close.gif';



// // getPageScroll() // Returns array with x,y page scroll values. // Core code from - quirksmode.org // function getPageScroll(){

var yScroll;

if (self.pageYOffset) { yScroll = self.pageYOffset; } else if (document.documentElement && document.documentElement.scrollTop){ // Explorer 6 Strict yScroll = document.documentElement.scrollTop; } else if (document.body) {// all other Explorers yScroll = document.body.scrollTop; }

arrayPageScroll = new Array(,yScroll) return arrayPageScroll; }


// // getPageSize() // Returns array with page width, height and window width, height // Core code from - quirksmode.org // Edit for Firefox by pHaez // function getPageSize(){

var xScroll, yScroll;

if (window.innerHeight && window.scrollMaxY) { xScroll = document.body.scrollWidth; yScroll = window.innerHeight + window.scrollMaxY; } else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac xScroll = document.body.scrollWidth; yScroll = document.body.scrollHeight; } else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari xScroll = document.body.offsetWidth; yScroll = document.body.offsetHeight; }

var windowWidth, windowHeight; if (self.innerHeight) { // all except Explorer windowWidth = self.innerWidth; windowHeight = self.innerHeight; } else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode windowWidth = document.documentElement.clientWidth; windowHeight = document.documentElement.clientHeight; } else if (document.body) { // other Explorers windowWidth = document.body.clientWidth; windowHeight = document.body.clientHeight; }

// for small pages with total height less then height of the viewport if(yScroll < windowHeight){ pageHeight = windowHeight; } else { pageHeight = yScroll; }

// for small pages with total width less then width of the viewport if(xScroll < windowWidth){ pageWidth = windowWidth; } else { pageWidth = xScroll; }


arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight) return arrayPageSize; }


// // pause(numberMillis) // Pauses code execution for specified time. Uses busy code, not good. // Code from http://www.faqts.com/knowledge_base/view.phtml/aid/1602 // function pause(numberMillis) { var now = new Date(); var exitTime = now.getTime() + numberMillis; while (true) { now = new Date(); if (now.getTime() > exitTime) return; } }

// // getKey(key) // Gets keycode. If 'x' is pressed then it hides the lightbox. //

function getKey(e){ if (e == null) { // ie keycode = event.keyCode; } else { // mozilla keycode = e.which; } key = String.fromCharCode(keycode).toLowerCase();

if(key == 'x'){ hideLightbox(); } }


// // listenKey() // function listenKey () { document.onkeypress = getKey; }


// // showLightbox() // Preloads images. Pleaces new image in lightbox then centers and displays. // function showLightbox(objLink) { // prep objects var objOverlay = document.getElementById('overlay'); var objLightbox = document.getElementById('lightbox'); var objCaption = document.getElementById('lightboxCaption'); var objImage = document.getElementById('lightboxImage'); var objLoadingImage = document.getElementById('loadingImage'); var objLightboxDetails = document.getElementById('lightboxDetails');


var arrayPageSize = getPageSize(); var arrayPageScroll = getPageScroll();

// center loadingImage if it exists if (objLoadingImage) { objLoadingImage.style.top = (arrayPageScroll[1] + ((arrayPageSize[3] - 35 - objLoadingImage.height) / 2) + 'px'); objLoadingImage.style.left = (((arrayPageSize[0] - 20 - objLoadingImage.width) / 2) + 'px'); objLoadingImage.style.display = 'block'; }

// set height of Overlay to take up whole page and show objOverlay.style.height = (arrayPageSize[1] + 'px'); objOverlay.style.display = 'block';

// preload image imgPreload = new Image();

imgPreload.onload=function(){ objImage.src = objLink.href;

// center lightbox and make sure that the top and left values are not negative // and the image placed outside the viewport var lightboxTop = arrayPageScroll[1] + ((arrayPageSize[3] - 35 - imgPreload.height) / 2); var lightboxLeft = ((arrayPageSize[0] - 20 - imgPreload.width) / 2);

objLightbox.style.top = (lightboxTop < 0) ? "0px" : lightboxTop + "px"; objLightbox.style.left = (lightboxLeft < 0) ? "0px" : lightboxLeft + "px";


objLightboxDetails.style.width = imgPreload.width + 'px';

if(objLink.getAttribute('title')){ objCaption.style.display = 'block'; //objCaption.style.width = imgPreload.width + 'px'; objCaption.innerHTML = objLink.getAttribute('title'); } else { objCaption.style.display = 'none'; }

// A small pause between the image loading and displaying is required with IE, // this prevents the previous image displaying for a short burst causing flicker. if (navigator.appVersion.indexOf("MSIE")!=-1){ pause(250); }

if (objLoadingImage) { objLoadingImage.style.display = 'none'; }

// Hide select boxes as they will 'peek' through the image in IE selects = document.getElementsByTagName("select"); 

       for (i = 0; i != selects.length; i++) {
               selects[i].style.visibility = "hidden";
       }


objLightbox.style.display = 'block';

// After image is loaded, update the overlay height as the new image might have // increased the overall page height. arrayPageSize = getPageSize(); objOverlay.style.height = (arrayPageSize[1] + 'px');

// Check for 'x' keypress listenKey();

return false; }

imgPreload.src = objLink.href;

}



// // hideLightbox() // function hideLightbox() { // get objects objOverlay = document.getElementById('overlay'); objLightbox = document.getElementById('lightbox');

// hide lightbox and overlay objOverlay.style.display = 'none'; objLightbox.style.display = 'none';

// make select boxes visible selects = document.getElementsByTagName("select"); 

   for (i = 0; i != selects.length; i++) {

selects[i].style.visibility = "visible"; }

// disable keypress listener document.onkeypress = ; }



// // initLightbox() // Function runs on window load, going through link tags looking for rel="lightbox". // These links receive onclick events that enable the lightbox display for their targets. // The function also inserts html markup at the top of the page which will be used as a // container for the overlay pattern and the inline image. // function initLightbox() {

if (!document.getElementsByTagName){ return; } var anchors = document.getElementsByTagName("a");

// loop through all anchor tags for (var i=0; i<anchors.length; i++){ var anchor = anchors[i];

if (anchor.getAttribute("href") && (anchor.getAttribute("rel") == "lightbox")){ anchor.onclick = function () {showLightbox(this); return false;} } }

// the rest of this code inserts html at the top of the page that looks like this: //

//

// <a href="#" onclick="hideLightbox(); return false;"><img id="loadingImage" /></a>

//
//

var objBody = document.getElementsByTagName("body").item(0);

// create overlay div and hardcode some functional styles (aesthetic styles are in CSS file) var objOverlay = document.createElement("div"); objOverlay.setAttribute('id','overlay'); objOverlay.onclick = function () {hideLightbox(); return false;} objOverlay.style.display = 'none'; objOverlay.style.position = 'absolute'; objOverlay.style.top = '0'; objOverlay.style.left = '0'; objOverlay.style.zIndex = '90'; 

	objOverlay.style.width = '100%';

objBody.insertBefore(objOverlay, objBody.firstChild);

var arrayPageSize = getPageSize(); var arrayPageScroll = getPageScroll();

// preload and create loader image var imgPreloader = new Image();

// if loader image found, create link to hide lightbox and create loadingimage imgPreloader.onload=function(){

var objLoadingImageLink = document.createElement("a"); objLoadingImageLink.setAttribute('href','#'); objLoadingImageLink.onclick = function () {hideLightbox(); return false;} objOverlay.appendChild(objLoadingImageLink);

var objLoadingImage = document.createElement("img"); objLoadingImage.src = loadingImage; objLoadingImage.setAttribute('id','loadingImage'); objLoadingImage.style.position = 'absolute'; objLoadingImage.style.zIndex = '150'; objLoadingImageLink.appendChild(objLoadingImage);

imgPreloader.onload=function(){}; // clear onLoad, as IE will flip out w/animated gifs

return false; }

imgPreloader.src = loadingImage;

// create lightbox div, same note about styles as above var objLightbox = document.createElement("div"); objLightbox.setAttribute('id','lightbox'); objLightbox.style.display = 'none'; objLightbox.style.position = 'absolute'; objLightbox.style.zIndex = '100'; objBody.insertBefore(objLightbox, objOverlay.nextSibling);

// create link var objLink = document.createElement("a"); objLink.setAttribute('href','#'); objLink.setAttribute('title','Click to close'); objLink.onclick = function () {hideLightbox(); return false;} objLightbox.appendChild(objLink);

// preload and create close button image var imgPreloadCloseButton = new Image();

// if close button image found, imgPreloadCloseButton.onload=function(){

var objCloseButton = document.createElement("img"); objCloseButton.src = closeButton; objCloseButton.setAttribute('id','closeButton'); objCloseButton.style.position = 'absolute'; objCloseButton.style.zIndex = '200'; objLink.appendChild(objCloseButton);

return false; }

imgPreloadCloseButton.src = closeButton;

// create image var objImage = document.createElement("img"); objImage.setAttribute('id','lightboxImage'); objLink.appendChild(objImage);

// create details div, a container for the caption and keyboard message var objLightboxDetails = document.createElement("div"); objLightboxDetails.setAttribute('id','lightboxDetails'); objLightbox.appendChild(objLightboxDetails);

// create caption var objCaption = document.createElement("div"); objCaption.setAttribute('id','lightboxCaption'); objCaption.style.display = 'none'; objLightboxDetails.appendChild(objCaption);

// create keyboard message var objKeyboardMsg = document.createElement("div"); objKeyboardMsg.setAttribute('id','keyboardMsg'); objKeyboardMsg.innerHTML = 'press <a href="#" onclick="hideLightbox(); return false;"><kbd>x</kbd></a> to close'; objLightboxDetails.appendChild(objKeyboardMsg);


}



// // addLoadEvent() // Adds event to window.onload without overwriting currently assigned onload functions. // Function found at Simon Willison's weblog - http://simon.incutio.com/ // function addLoadEvent(func) { var oldonload = window.onload; if (typeof window.onload != 'function'){ 

   	window.onload = func;

} else { window.onload = function(){ oldonload(); func(); } }

}


addLoadEvent(initLightbox); // run initLightbox onLoad




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