Team:Freiburg Software/Team/Photos

From 2010.igem.org

(Difference between revisions)
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</style>
</style>
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 +
<stript>
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 +
/*
 +
 +
 +
Table of Contents
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-----------------
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Configuration
 +
 +
Functions
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- getPageScroll()
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- getPageSize()
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- pause()
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- getKey()
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- listenKey()
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- showLightbox()
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- hideLightbox()
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- initLightbox()
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- addLoadEvent()
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Function Calls
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- addLoadEvent(initLightbox)
 +
 +
*/
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 +
 +
 +
//
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// Configuration
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//
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// If you would like to use a custom loading image or close button reference them in the next two lines.
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var loadingImage = 'loading.gif';
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var closeButton = 'close.gif';
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 +
 +
 +
 +
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//
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// getPageScroll()
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// Returns array with x,y page scroll values.
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//
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function getPageScroll(){
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var yScroll;
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if (self.pageYOffset) {
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yScroll = self.pageYOffset;
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} else if (document.documentElement && document.documentElement.scrollTop){ // Explorer 6 Strict
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yScroll = document.documentElement.scrollTop;
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} else if (document.body) {// all other Explorers
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yScroll = document.body.scrollTop;
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}
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arrayPageScroll = new Array('',yScroll)
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return arrayPageScroll;
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}
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//
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// getPageSize()
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// Returns array with page width, height and window width, height
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//
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function getPageSize(){
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var xScroll, yScroll;
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if (window.innerHeight && window.scrollMaxY) {
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xScroll = document.body.scrollWidth;
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yScroll = window.innerHeight + window.scrollMaxY;
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} else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac
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xScroll = document.body.scrollWidth;
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yScroll = document.body.scrollHeight;
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} else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
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xScroll = document.body.offsetWidth;
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yScroll = document.body.offsetHeight;
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}
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var windowWidth, windowHeight;
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if (self.innerHeight) { // all except Explorer
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windowWidth = self.innerWidth;
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windowHeight = self.innerHeight;
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} else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
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windowWidth = document.documentElement.clientWidth;
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windowHeight = document.documentElement.clientHeight;
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} else if (document.body) { // other Explorers
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windowWidth = document.body.clientWidth;
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windowHeight = document.body.clientHeight;
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}
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// for small pages with total height less then height of the viewport
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if(yScroll < windowHeight){
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pageHeight = windowHeight;
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} else {
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pageHeight = yScroll;
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}
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// for small pages with total width less then width of the viewport
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if(xScroll < windowWidth){
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pageWidth = windowWidth;
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} else {
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pageWidth = xScroll;
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}
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arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight)
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return arrayPageSize;
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}
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//
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// pause(numberMillis)
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// Pauses code execution for specified time. Uses busy code, not good.
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//
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function pause(numberMillis) {
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var now = new Date();
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var exitTime = now.getTime() + numberMillis;
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while (true) {
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now = new Date();
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if (now.getTime() > exitTime)
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return;
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}
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}
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//
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// getKey(key)
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// Gets keycode. If 'x' is pressed then it hides the lightbox.
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//
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function getKey(e){
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if (e == null) { // ie
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keycode = event.keyCode;
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} else { // mozilla
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keycode = e.which;
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}
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key = String.fromCharCode(keycode).toLowerCase();
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if(key == 'x'){ hideLightbox(); }
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}
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//
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// listenKey()
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//
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function listenKey () { document.onkeypress = getKey; }
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 +
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//
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// showLightbox()
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// Preloads images. Pleaces new image in lightbox then centers and displays.
 +
//
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function showLightbox(objLink)
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{
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// prep objects
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var objOverlay = document.getElementById('overlay');
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var objLightbox = document.getElementById('lightbox');
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var objCaption = document.getElementById('lightboxCaption');
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var objImage = document.getElementById('lightboxImage');
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var objLoadingImage = document.getElementById('loadingImage');
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var objLightboxDetails = document.getElementById('lightboxDetails');
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 +
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var arrayPageSize = getPageSize();
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var arrayPageScroll = getPageScroll();
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// center loadingImage if it exists
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if (objLoadingImage) {
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objLoadingImage.style.top = (arrayPageScroll[1] + ((arrayPageSize[3] - 35 - objLoadingImage.height) / 2) + 'px');
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objLoadingImage.style.left = (((arrayPageSize[0] - 20 - objLoadingImage.width) / 2) + 'px');
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objLoadingImage.style.display = 'block';
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}
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// set height of Overlay to take up whole page and show
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objOverlay.style.height = (arrayPageSize[1] + 'px');
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objOverlay.style.display = 'block';
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// preload image
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imgPreload = new Image();
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imgPreload.onload=function(){
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objImage.src = objLink.href;
 +
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// center lightbox and make sure that the top and left values are not negative
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// and the image placed outside the viewport
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var lightboxTop = arrayPageScroll[1] + ((arrayPageSize[3] - 35 - imgPreload.height) / 2);
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var lightboxLeft = ((arrayPageSize[0] - 20 - imgPreload.width) / 2);
 +
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objLightbox.style.top = (lightboxTop < 0) ? "0px" : lightboxTop + "px";
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objLightbox.style.left = (lightboxLeft < 0) ? "0px" : lightboxLeft + "px";
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objLightboxDetails.style.width = imgPreload.width + 'px';
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if(objLink.getAttribute('title')){
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objCaption.style.display = 'block';
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//objCaption.style.width = imgPreload.width + 'px';
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objCaption.innerHTML = objLink.getAttribute('title');
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} else {
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objCaption.style.display = 'none';
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}
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// 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);
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}
 +
 +
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++) {
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                selects[i].style.visibility = "hidden";
 +
        }
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objLightbox.style.display = 'block';
 +
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// After image is loaded, update the overlay height as the new image might have
 +
// increased the overall page height.
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arrayPageSize = getPageSize();
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objOverlay.style.height = (arrayPageSize[1] + 'px');
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// Check for 'x' keypress
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listenKey();
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return false;
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}
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imgPreload.src = objLink.href;
 +
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}
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//
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// hideLightbox()
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//
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function hideLightbox()
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{
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// get objects
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objOverlay = document.getElementById('overlay');
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objLightbox = document.getElementById('lightbox');
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// hide lightbox and overlay
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objOverlay.style.display = 'none';
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objLightbox.style.display = 'none';
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// make select boxes visible
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selects = document.getElementsByTagName("select");
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    for (i = 0; i != selects.length; i++) {
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selects[i].style.visibility = "visible";
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}
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// disable keypress listener
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document.onkeypress = '';
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}
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//
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// initLightbox()
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// Function runs on window load, going through link tags looking for rel="lightbox".
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// These links receive onclick events that enable the lightbox display for their targets.
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// The function also inserts html markup at the top of the page which will be used as a
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// container for the overlay pattern and the inline image.
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//
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function initLightbox()
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{
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if (!document.getElementsByTagName){ return; }
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var anchors = document.getElementsByTagName("a");
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// loop through all anchor tags
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for (var i=0; i<anchors.length; i++){
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var anchor = anchors[i];
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if (anchor.getAttribute("href") && (anchor.getAttribute("rel") == "lightbox")){
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anchor.onclick = function () {showLightbox(this); return false;}
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}
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}
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// the rest of this code inserts html at the top of the page that looks like this:
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//
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// <div id="overlay">
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// <a href="#" onclick="hideLightbox(); return false;"><img id="loadingImage" /></a>
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// </div>
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// <div id="lightbox">
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// <a href="#" onclick="hideLightbox(); return false;" title="Click anywhere to close image">
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// <img id="closeButton" />
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// <img id="lightboxImage" />
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// </a>
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// <div id="lightboxDetails">
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// <div id="lightboxCaption"></div>
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// <div id="keyboardMsg"></div>
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// </div>
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// </div>
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var objBody = document.getElementsByTagName("body").item(0);
 +
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// create overlay div and hardcode some functional styles (aesthetic styles are in CSS file)
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var objOverlay = document.createElement("div");
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objOverlay.setAttribute('id','overlay');
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objOverlay.onclick = function () {hideLightbox(); return false;}
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objOverlay.style.display = 'none';
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objOverlay.style.position = 'absolute';
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objOverlay.style.top = '0';
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objOverlay.style.left = '0';
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objOverlay.style.zIndex = '90';
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objOverlay.style.width = '100%';
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objBody.insertBefore(objOverlay, objBody.firstChild);
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var arrayPageSize = getPageSize();
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var arrayPageScroll = getPageScroll();
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// preload and create loader image
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var imgPreloader = new Image();
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// if loader image found, create link to hide lightbox and create loadingimage
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imgPreloader.onload=function(){
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var objLoadingImageLink = document.createElement("a");
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objLoadingImageLink.setAttribute('href','#');
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objLoadingImageLink.onclick = function () {hideLightbox(); return false;}
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objOverlay.appendChild(objLoadingImageLink);
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var objLoadingImage = document.createElement("img");
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objLoadingImage.src = loadingImage;
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objLoadingImage.setAttribute('id','loadingImage');
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objLoadingImage.style.position = 'absolute';
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objLoadingImage.style.zIndex = '150';
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objLoadingImageLink.appendChild(objLoadingImage);
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imgPreloader.onload=function(){}; // clear onLoad, as IE will flip out w/animated gifs
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return false;
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}
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imgPreloader.src = loadingImage;
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// create lightbox div, same note about styles as above
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var objLightbox = document.createElement("div");
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objLightbox.setAttribute('id','lightbox');
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objLightbox.style.display = 'none';
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objLightbox.style.position = 'absolute';
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objLightbox.style.zIndex = '100';
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objBody.insertBefore(objLightbox, objOverlay.nextSibling);
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// create link
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var objLink = document.createElement("a");
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objLink.setAttribute('href','#');
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objLink.setAttribute('title','Click to close');
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objLink.onclick = function () {hideLightbox(); return false;}
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objLightbox.appendChild(objLink);
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// preload and create close button image
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var imgPreloadCloseButton = new Image();
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// if close button image found,
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imgPreloadCloseButton.onload=function(){
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var objCloseButton = document.createElement("img");
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objCloseButton.src = closeButton;
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objCloseButton.setAttribute('id','closeButton');
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objCloseButton.style.position = 'absolute';
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objCloseButton.style.zIndex = '200';
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objLink.appendChild(objCloseButton);
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return false;
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}
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imgPreloadCloseButton.src = closeButton;
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// create image
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var objImage = document.createElement("img");
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objImage.setAttribute('id','lightboxImage');
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objLink.appendChild(objImage);
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// create details div, a container for the caption and keyboard message
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var objLightboxDetails = document.createElement("div");
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objLightboxDetails.setAttribute('id','lightboxDetails');
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objLightbox.appendChild(objLightboxDetails);
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// create caption
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var objCaption = document.createElement("div");
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objCaption.setAttribute('id','lightboxCaption');
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objCaption.style.display = 'none';
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objLightboxDetails.appendChild(objCaption);
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// create keyboard message
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var objKeyboardMsg = document.createElement("div");
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objKeyboardMsg.setAttribute('id','keyboardMsg');
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objKeyboardMsg.innerHTML = 'press <a href="#" onclick="hideLightbox(); return false;"><kbd>x</kbd></a> to close';
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objLightboxDetails.appendChild(objKeyboardMsg);
 +
 +
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}
 +
 +
 +
 +
 +
//
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// addLoadEvent()
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// 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)
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{
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var oldonload = window.onload;
 +
if (typeof window.onload != 'function'){
 +
    window.onload = func;
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} else {
 +
window.onload = function(){
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oldonload();
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func();
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}
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}
 +
 +
}
 +
 +
 +
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addLoadEvent(initLightbox); // run initLightbox onLoad
 +
 +
</stript>
<div id="overlay">
<div id="overlay">

Revision as of 14:32, 25 October 2010

/* 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. // 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 // 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. // 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 // //

// 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 x 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

Retrieved from "http://2010.igem.org/Team:Freiburg_Software/Team/Photos"