357 lines
11 KiB
JavaScript
357 lines
11 KiB
JavaScript
/**
|
|
* jQuery Lightbox
|
|
* Version 0.4 - 09/17/2007
|
|
* @author Warren Krewenki
|
|
*
|
|
* Based on Lightbox 2 by Lokesh Dhakar (http://www.huddletogether.com/projects/lightbox2/)
|
|
* Originally written to make use of the Prototype framework, and Script.acalo.us, now altered to use jQuery.
|
|
*
|
|
**/
|
|
|
|
var Lightbox = {
|
|
fileLoadingImage : "admin/css/images/loading.gif",
|
|
fileBottomNavCloseImage : 'admin/css/images/closelabel.gif',
|
|
overlayOpacity : 0.8,
|
|
borderSize : 10,
|
|
imageArray : new Array,
|
|
activeImage : null,
|
|
inprogress : false,
|
|
resizeSpeed : 350,
|
|
destroyElement: function(id){
|
|
if(el = document.getElementById(id)){
|
|
el.parentNode.removeChild(el);
|
|
}
|
|
},
|
|
initialize: function() {
|
|
// attach lightbox to any links with rel 'lightbox'
|
|
$("a").each(function(){
|
|
if(this.rel.toLowerCase().match('lightbox')){
|
|
$(this).click(function(){
|
|
Lightbox.start(this);
|
|
return false;
|
|
});
|
|
}
|
|
});
|
|
|
|
Lightbox.destroyElement('overlay'); Lightbox.destroyElement('lightbox');
|
|
$("body").append('<div id="overlay"></div><div id="lightbox"><div id="outerImageContainer"><div id="imageContainer"><img id="lightboxImage"><div style="" id="hoverNav"><a href="#" id="prevLink"></a><a href="#" id="nextLink"></a></div><div id="loading"><a href="#" id="loadingLink"><img src="'+Lightbox.fileLoadingImage+'"></a></div></div></div><div id="imageDataContainer"><div id="imageData"><div id="imageDetails"><span id="caption"></span><span id="numberDisplay"></span></div><div id="bottomNav"><a href="#" id="bottomNavClose"><img src="'+Lightbox.fileBottomNavCloseImage+'"></a></div></div></div></div>');
|
|
$("#overlay").click(function(){ Lightbox.end(); }).hide();
|
|
$("#lightbox").click(function(){ Lightbox.end();}).hide();
|
|
$("#loadingLink").click(function(){ Lightbox.end(); return false;});
|
|
$("#bottomNavClose").click(function(){ Lightbox.end(); return false; });
|
|
$('#outerImageContainer').css({width: '250px', height: '250px'});
|
|
},
|
|
|
|
//
|
|
// start()
|
|
// Display overlay and lightbox. If image is part of a set, add siblings to Lightbox.imageArray.
|
|
//
|
|
start: function(imageLink) {
|
|
$("select, embed, object").hide();
|
|
|
|
// stretch overlay to fill page and fade in
|
|
var arrayPageSize = Lightbox.getPageSize();
|
|
$("#overlay").hide().css({width: '100%', height: arrayPageSize[1]+'px', opacity : Lightbox.overlayOpacity}).fadeIn();
|
|
|
|
Lightbox.imageArray = [];
|
|
imageNum = 0;
|
|
|
|
var anchors = document.getElementsByTagName( imageLink.tagName);
|
|
|
|
// if image is NOT part of a set..
|
|
if((imageLink.rel == 'lightbox')){
|
|
// add single image to Lightbox.imageArray
|
|
Lightbox.imageArray.push(new Array(imageLink.href, imageLink.title));
|
|
} else {
|
|
// if image is part of a set..
|
|
|
|
// loop through anchors, find other images in set, and add them to Lightbox.imageArray
|
|
for (var i=0; i<anchors.length; i++){
|
|
var anchor = anchors[i];
|
|
if (anchor.href && (anchor.rel == imageLink.rel)){
|
|
Lightbox.imageArray.push(new Array(anchor.href, anchor.title));
|
|
}
|
|
}
|
|
|
|
for(i = 0; i < Lightbox.imageArray.length; i++){
|
|
for(j = Lightbox.imageArray.length-1; j>i; j--){
|
|
if(Lightbox.imageArray[i][0] == Lightbox.imageArray[j][0]){
|
|
Lightbox.imageArray.splice(j,1);
|
|
}
|
|
}
|
|
}
|
|
while(Lightbox.imageArray[imageNum][0] != imageLink.href) { imageNum++;}
|
|
}
|
|
|
|
// calculate top and left offset for the lightbox
|
|
var arrayPageScroll = Lightbox.getPageScroll();
|
|
var lightboxTop = arrayPageScroll[1] + (arrayPageSize[3] / 10);
|
|
var lightboxLeft = arrayPageScroll[0];
|
|
$('#lightbox').css({top: lightboxTop+'px', left: lightboxLeft+'px'}).show();
|
|
|
|
this.changeImage(imageNum);
|
|
},
|
|
|
|
//
|
|
// changeImage()
|
|
// Hide most elements and preload image in preparation for resizing image container.
|
|
//
|
|
changeImage: function(imageNum) {
|
|
if(this.inprogress == false){
|
|
this.inprogress = true;
|
|
Lightbox.activeImage = imageNum; // update global var
|
|
|
|
// hide elements during transition
|
|
$('#loading').show();
|
|
$('#lightboxImage').hide();
|
|
$('#hoverNav').hide();
|
|
$('#prevLink').hide();
|
|
$('#nextLink').hide();
|
|
$('#imageDataContainer').hide();
|
|
$('#numberDisplay').hide();
|
|
|
|
imgPreloader = new Image();
|
|
|
|
// once image is preloaded, resize image container
|
|
imgPreloader.onload=function(){
|
|
document.getElementById('lightboxImage').src = Lightbox.imageArray[Lightbox.activeImage][0];
|
|
Lightbox.resizeImageContainer(imgPreloader.width, imgPreloader.height);
|
|
}
|
|
imgPreloader.src = Lightbox.imageArray[Lightbox.activeImage][0];
|
|
}
|
|
},
|
|
|
|
//
|
|
// resizeImageContainer()
|
|
//
|
|
resizeImageContainer: function( imgWidth, imgHeight) {
|
|
|
|
// get curren width and height
|
|
this.widthCurrent = document.getElementById('outerImageContainer').offsetWidth;
|
|
this.heightCurrent = document.getElementById('outerImageContainer').offsetHeight;
|
|
|
|
// get new width and height
|
|
var widthNew = (imgWidth + (Lightbox.borderSize * 2));
|
|
var heightNew = (imgHeight + (Lightbox.borderSize * 2));
|
|
|
|
// scalars based on change from old to new
|
|
this.xScale = ( widthNew / this.widthCurrent) * 100;
|
|
this.yScale = ( heightNew / this.heightCurrent) * 100;
|
|
|
|
// calculate size difference between new and old image, and resize if necessary
|
|
wDiff = this.widthCurrent - widthNew;
|
|
hDiff = this.heightCurrent - heightNew;
|
|
|
|
$('#outerImageContainer').animate({width: widthNew, height: heightNew},Lightbox.resizeSpeed,'linear',function(){
|
|
Lightbox.showImage();
|
|
|
|
});
|
|
|
|
|
|
// if new and old image are same size and no scaling transition is necessary,
|
|
// do a quick pause to prevent image flicker.
|
|
if((hDiff == 0) && (wDiff == 0)){
|
|
if (navigator.appVersion.indexOf("MSIE")!=-1){ Lightbox.pause(250); } else { Lightbox.pause(100);}
|
|
}
|
|
|
|
$('#prevLink').css({height: imgHeight+'px'});
|
|
$('#nextLink').css({height: imgHeight+'px'});
|
|
$('#imageDataContainer').css({width: widthNew+'px'});
|
|
|
|
|
|
},
|
|
|
|
//
|
|
// showImage()
|
|
// Display image and begin preloading neighbors.
|
|
//
|
|
showImage: function(){
|
|
$('#loading').hide();
|
|
$('#lightboxImage').fadeIn("fast");
|
|
Lightbox.updateDetails();
|
|
this.preloadNeighborImages();
|
|
this.inprogress = false;
|
|
},
|
|
|
|
//
|
|
// updateDetails()
|
|
// Display caption, image number, and bottom nav.
|
|
//
|
|
updateDetails: function() {
|
|
$("#imageDataContainer").hide();
|
|
// if caption is not null
|
|
if(Lightbox.imageArray[Lightbox.activeImage][1]){
|
|
$('#caption').html(Lightbox.imageArray[Lightbox.activeImage][1]).show();
|
|
}
|
|
|
|
// if image is part of set display 'Image x of x'
|
|
if(Lightbox.imageArray.length > 1){
|
|
$('#numberDisplay').html("Image " + eval(Lightbox.activeImage + 1) + " of " + Lightbox.imageArray.length).show();
|
|
}
|
|
|
|
$("#imageDataContainer").hide().slideDown("slow");
|
|
var arrayPageSize = Lightbox.getPageSize();
|
|
$('#overLay').css({height: arrayPageSize[1]+'px'});
|
|
Lightbox.updateNav();
|
|
},
|
|
|
|
//
|
|
// updateNav()
|
|
// Display appropriate previous and next hover navigation.
|
|
//
|
|
updateNav: function() {
|
|
|
|
$('#hoverNav').show();
|
|
|
|
// if not first image in set, display prev image button
|
|
if(Lightbox.activeImage != 0){
|
|
$('#prevLink').show().click(function(){
|
|
Lightbox.changeImage(Lightbox.activeImage - 1); return false;
|
|
});
|
|
}
|
|
|
|
// if not last image in set, display next image button
|
|
if(Lightbox.activeImage != (Lightbox.imageArray.length - 1)){
|
|
$('#nextLink').show().click(function(){
|
|
|
|
Lightbox.changeImage(Lightbox.activeImage +1); return false;
|
|
});
|
|
}
|
|
|
|
this.enableKeyboardNav();
|
|
},
|
|
|
|
|
|
enableKeyboardNav: function() {
|
|
document.onkeydown = this.keyboardAction;
|
|
},
|
|
|
|
disableKeyboardNav: function() {
|
|
document.onkeydown = '';
|
|
},
|
|
|
|
keyboardAction: function(e) {
|
|
if (e == null) { // ie
|
|
keycode = event.keyCode;
|
|
escapeKey = 27;
|
|
} else { // mozilla
|
|
keycode = e.keyCode;
|
|
escapeKey = e.DOM_VK_ESCAPE;
|
|
}
|
|
|
|
key = String.fromCharCode(keycode).toLowerCase();
|
|
|
|
if((key == 'x') || (key == 'o') || (key == 'c') || (keycode == escapeKey)){ // close lightbox
|
|
Lightbox.end();
|
|
} else if((key == 'p') || (keycode == 37)){ // display previous image
|
|
if(Lightbox.activeImage != 0){
|
|
Lightbox.disableKeyboardNav();
|
|
Lightbox.changeImage(Lightbox.activeImage - 1);
|
|
}
|
|
} else if((key == 'n') || (keycode == 39)){ // display next image
|
|
if(Lightbox.activeImage != (Lightbox.imageArray.length - 1)){
|
|
Lightbox.disableKeyboardNav();
|
|
Lightbox.changeImage(Lightbox.activeImage + 1);
|
|
}
|
|
}
|
|
|
|
},
|
|
|
|
preloadNeighborImages: function(){
|
|
|
|
if((Lightbox.imageArray.length - 1) > Lightbox.activeImage){
|
|
preloadNextImage = new Image();
|
|
preloadNextImage.src = Lightbox.imageArray[Lightbox.activeImage + 1][0];
|
|
}
|
|
if(Lightbox.activeImage > 0){
|
|
preloadPrevImage = new Image();
|
|
preloadPrevImage.src = Lightbox.imageArray[Lightbox.activeImage - 1][0];
|
|
}
|
|
|
|
},
|
|
|
|
end: function() {
|
|
this.disableKeyboardNav();
|
|
$('#lightbox').hide();
|
|
$("#overlay").fadeOut();
|
|
$("select, object, embed").show();
|
|
},
|
|
|
|
getPageSize : function(){
|
|
var xScroll, yScroll;
|
|
|
|
if (window.innerHeight && window.scrollMaxY) {
|
|
xScroll = window.innerWidth + window.scrollMaxX;
|
|
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
|
|
if(document.documentElement.clientWidth){
|
|
windowWidth = document.documentElement.clientWidth;
|
|
} else {
|
|
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 = xScroll;
|
|
} else {
|
|
pageWidth = windowWidth;
|
|
}
|
|
|
|
arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight)
|
|
return arrayPageSize;
|
|
},
|
|
getPageScroll : function(){
|
|
|
|
var xScroll, yScroll;
|
|
|
|
if (self.pageYOffset) {
|
|
yScroll = self.pageYOffset;
|
|
xScroll = self.pageXOffset;
|
|
} else if (document.documentElement && document.documentElement.scrollTop){ // Explorer 6 Strict
|
|
yScroll = document.documentElement.scrollTop;
|
|
xScroll = document.documentElement.scrollLeft;
|
|
} else if (document.body) {// all other Explorers
|
|
yScroll = document.body.scrollTop;
|
|
xScroll = document.body.scrollLeft;
|
|
}
|
|
|
|
arrayPageScroll = new Array(xScroll,yScroll)
|
|
return arrayPageScroll;
|
|
},
|
|
pause : function(ms){
|
|
var date = new Date();
|
|
curDate = null;
|
|
do{var curDate = new Date();}
|
|
while( curDate - date < ms);
|
|
}
|
|
};
|
|
|
|
$(document).ready(function(){
|
|
Lightbox.initialize();
|
|
}); |