/***
@title:
Image Zoom
@version:
2.0
@author:
Andreas Lagerkvist
@date:
2008-08-31
@url:
http://andreaslagerkvist.com/jquery/image-zoom/
@license:
http://creativecommons.org/licenses/by/3.0/
@copyright:
2008 Andreas Lagerkvist (andreaslagerkvist.com)
@requires:
jquery, jquery.imageZoom.css, jquery.imageZoom.png
@does:
This plug-in makes links pointing to images open in the "Image Zoom". Clicking a link will zoom out the clicked image to its target-image. Click anywhere on the image or the close-button to zoom the image back in. Only ~3k minified.
@howto:
jQuery(document.body).imageZoom(); Would make every link pointing to an image in the document open in the zoom.
@exampleHTML:
@exampleJS:
// I don't run it because my site already uses imgZoom
// jQuery(document.body).imageZoom();
***/
jQuery.fn.imageZoom = function (conf) {
// Some config. If you set dontFadeIn: 0 and hideClicked: 0 imgzoom will act exactly like fancyzoom
var config = jQuery.extend({
speed: 200, // Animation-speed of zoom
dontFadeIn: 1, // 1 = Do not fade in, 0 = Do fade in
hideClicked: 1, // Whether to hide the image that was clicked to bring up the imgzoom
imageMargin: 30, // Margin from image-edge to window-edge if image is larger than screen
className: 'jquery-image-zoom',
loading: 'Loading...'
}, conf);
config.doubleSpeed = config.speed / 4; // Used for fading in the close-button
return this.click(function(e) {
// Make sure the target-element is a link (or an element inside a link)
var clickedElement = jQuery(e.target); // The element that was actually clicked
var clickedLink = clickedElement.is('a') ? clickedElement : clickedElement.parents('a'); // If it's not an a, check if any of its parents is
clickedLink = (clickedLink && clickedLink.is('a') && clickedLink.attr('href').search(/(.*)\.(jpg|jpeg|gif|png|bmp|tif|tiff)$/gi) != -1) ? clickedLink : false; // If it was an a or child of an a, make sure it points to an image
var clickedImg = (clickedLink && clickedLink.find('img').length) ? clickedLink.find('img') : false; // See if the clicked link contains and image
// Only continue if a link pointing to an image was clicked
if (clickedLink) {
// These functions are used when the imaeg starts and stops loading (displays either 'loading..' or fades out the clicked img slightly)
clickedLink.oldText = clickedLink.text();
clickedLink.setLoadingImg = function () {
if (clickedImg) {
clickedImg.css({opacity: '0.5'});
}
else {
clickedLink.text(config.loading);
}
};
clickedLink.setNotLoadingImg = function () {
if (clickedImg) {
clickedImg.css({opacity: '1'});
}
else {
clickedLink.text(clickedLink.oldText);
}
};
// The URI to the image we are going to display
var displayImgSrc = clickedLink.attr('href');
// If an imgzoom wiv this image is already open dont do nathin
if (jQuery('div.' + config.className + ' img[src="' + displayImgSrc + '"]').length) {
return false;
}
// This function is run once the displayImgSrc-img has loaded (below)
var preloadOnload = function () {
// The clicked-link is faded out during loading, fade it back in
clickedLink.setNotLoadingImg();
// Now set some vars we need
var dimElement = clickedImg ? clickedImg : clickedLink; // The element used to retrieve dimensions of imgzoom before zoom (either clicked link or img inside)
var hideClicked = clickedImg ? config.hideClicked : 0; // Whether to hide clicked link (set in config but always true for non-image-links)
var offset = dimElement.offset(); // Offset of clicked link (or image inside)
var imgzoomBefore = { // The dimensions of the imgzoom _before_ it is zoomed out
width: dimElement.outerWidth(),
height: dimElement.outerHeight(),
left: offset.left,
top: offset.top/*,
opacity: config.dontFadeIn*/
};
var imgzoom = jQuery('').css('position', 'absolute').appendTo(document.body); // We don't want any class-name or any other contents part from the image when we calculate the new dimensions of the imgzoom
var imgzoomAfter = { // The dimensions of the imgzoom _after_ it is zoomed out
width: imgzoom.outerWidth(),
height: imgzoom.outerHeight()/*,
opacity: 1*/
};
var windowDim = {
width: jQuery(window).width(),
height: jQuery(window).height()
};
// Make sure imgzoom isn't wider than screen
if (imgzoomAfter.width > (windowDim.width - config.imageMargin * 2)) {
var nWidth = windowDim.width - config.imageMargin * 2;
imgzoomAfter.height = (nWidth / imgzoomAfter.width) * imgzoomAfter.height;
imgzoomAfter.width = nWidth;
}
// Now make sure it isn't taller
if (imgzoomAfter.height > (windowDim.height - config.imageMargin * 2)) {
var nHeight = windowDim.height - config.imageMargin * 2;
imgzoomAfter.width = (nHeight / imgzoomAfter.height) * imgzoomAfter.width;
imgzoomAfter.height = nHeight;
}
// Center imgzoom
imgzoomAfter.left = (windowDim.width - imgzoomAfter.width) / 2 + jQuery(window).scrollLeft();
imgzoomAfter.top = (windowDim.height - imgzoomAfter.height) / 2 + jQuery(window).scrollTop();
var closeButton = jQuery('Close').appendTo(imgzoom).hide(); // The button that closes the imgzoom (we're adding this after the calculation of the dimensions)
// Hide the clicked link if set so in config
if (hideClicked) {
clickedLink.css('visibility', 'hidden');
}
// Now animate the imgzoom from its small size to its large size, and then fade in the close-button
imgzoom.addClass(config.className).css(imgzoomBefore).animate(imgzoomAfter, config.speed, function () {
closeButton.fadeIn(config.doubleSpeed);
});
// This function closes the imgzoom
var hideImgzoom = function () {
closeButton.fadeOut(config.doubleSpeed, function () {
imgzoom.animate(imgzoomBefore, config.speed, function () {
clickedLink.css('visibility', 'visible');
imgzoom.remove();
});
});
return false;
};
// Close imgzoom when you click the closeButton or the imgzoom
imgzoom.click(hideImgzoom);
closeButton.click(hideImgzoom);
};
// Preload image
var preload = new Image();
preload.src = displayImgSrc;
if (preload.complete) {
preloadOnload();
}
else {
clickedLink.setLoadingImg();
preload.onload = preloadOnload;
}
// Finally return false from the click so the browser doesn't actually follow the link...
return false;
}
});
};
