731 lines
30 KiB
JavaScript
731 lines
30 KiB
JavaScript
/*!
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* jQzoom Evolution Library v2.3 - Javascript Image magnifier
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* http://www.mind-projects.it
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*
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* Copyright 2011, Engineer Marco Renzi
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* Licensed under the BSD license.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of the organization nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* Date: 03 May 2011 22:16:00
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*/
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(function ($) {
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//GLOBAL VARIABLES
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var isIE6 = ($.browser.msie && $.browser.version < 7);
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var body = $(document.body);
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var window = $(window);
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var jqzoompluging_disabled = false; //disabilita globalmente il plugin
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$.fn.jqzoom = function (options) {
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return this.each(function () {
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var node = this.nodeName.toLowerCase();
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if (node == 'a') {
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new jqzoom(this, options);
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}
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});
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};
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jqzoom = function (el, options) {
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var api = null;
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api = $(el).data("jqzoom");
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if (api) return api;
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var obj = this;
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var settings = $.extend({}, $.jqzoom.defaults, options || {});
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obj.el = el;
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el.rel = $(el).attr('rel');
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//ANCHOR ELEMENT
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el.zoom_active = false;
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el.zoom_disabled = false; //to disable single zoom instance
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el.largeimageloading = false; //tell us if large image is loading
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el.largeimageloaded = false; //tell us if large image is loaded
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el.scale = {};
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el.timer = null;
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el.mousepos = {};
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el.mouseDown = false;
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$(el).css({
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'outline-style': 'none',
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'text-decoration': 'none'
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});
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//BASE IMAGE
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var img = $("img:eq(0)", el);
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el.title = $(el).attr('title');
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el.imagetitle = img.attr('title');
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var zoomtitle = ($.trim(el.title).length > 0) ? el.title : el.imagetitle;
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var smallimage = new Smallimage(img);
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var lens = new Lens();
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var stage = new Stage();
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var largeimage = new Largeimage();
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var loader = new Loader();
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//preventing default click,allowing the onclick event [exmple: lightbox]
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$(el).bind('click', function (e) {
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e.preventDefault();
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return false;
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});
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//setting the default zoomType if not in settings
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var zoomtypes = ['standard', 'drag', 'innerzoom', 'reverse'];
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if ($.inArray($.trim(settings.zoomType), zoomtypes) < 0) {
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settings.zoomType = 'standard';
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}
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$.extend(obj, {
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create: function () { //create the main objects
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//create ZoomPad
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if ($(".zoomPad", el).length == 0) {
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el.zoomPad = $('<div/>').addClass('zoomPad');
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img.wrap(el.zoomPad);
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}
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if(settings.zoomType == 'innerzoom'){
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settings.zoomWidth = smallimage.w;
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settings.zoomHeight = smallimage.h;
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}
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//creating ZoomPup
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if ($(".zoomPup", el).length == 0) {
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lens.append();
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}
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//creating zoomWindow
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if ($(".zoomWindow", el).length == 0) {
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stage.append();
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}
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//creating Preload
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if ($(".zoomPreload", el).length == 0) {
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loader.append();
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}
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//preloading images
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if (settings.preloadImages || settings.zoomType == 'drag' || settings.alwaysOn) {
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obj.load();
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}
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obj.init();
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},
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init: function () {
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//drag option
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if (settings.zoomType == 'drag') {
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$(".zoomPad", el).mousedown(function () {
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el.mouseDown = true;
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});
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$(".zoomPad", el).mouseup(function () {
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el.mouseDown = false;
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});
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document.body.ondragstart = function () {
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return false;
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};
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$(".zoomPad", el).css({
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cursor: 'default'
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});
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$(".zoomPup", el).css({
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cursor: 'move'
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});
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}
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if (settings.zoomType == 'innerzoom') {
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$(".zoomWrapper", el).css({
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cursor: 'crosshair'
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});
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}
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$(".zoomPad", el).bind('mouseenter mouseover', function (event) {
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img.attr('title', '');
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$(el).attr('title', '');
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el.zoom_active = true;
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//if loaded then activate else load large image
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smallimage.fetchdata();
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if (el.largeimageloaded) {
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obj.activate(event);
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} else {
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obj.load();
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}
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});
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$(".zoomPad", el).bind('mouseleave', function (event) {
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obj.deactivate();
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});
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$(".zoomPad", el).bind('mousemove', function (e) {
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//prevent fast mouse mevements not to fire the mouseout event
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if (e.pageX > smallimage.pos.r || e.pageX < smallimage.pos.l || e.pageY < smallimage.pos.t || e.pageY > smallimage.pos.b) {
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lens.setcenter();
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return false;
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}
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el.zoom_active = true;
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if (el.largeimageloaded && !$('.zoomWindow', el).is(':visible')) {
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obj.activate(e);
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}
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if (el.largeimageloaded && (settings.zoomType != 'drag' || (settings.zoomType == 'drag' && el.mouseDown))) {
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lens.setposition(e);
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}
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});
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var thumb_preload = new Array();
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var i = 0;
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//binding click event on thumbnails
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var thumblist = new Array();
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thumblist = $('a').filter(function () {
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var regex = new RegExp("gallery[\\s]*:[\\s]*'" + $.trim(el.rel) + "'", "i");
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var rel = $(this).attr('rel');
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if (regex.test(rel)) {
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return this;
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}
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});
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if (thumblist.length > 0) {
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//getting the first to the last
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var first = thumblist.splice(0, 1);
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thumblist.push(first);
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}
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thumblist.each(function () {
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//preloading thumbs
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if (settings.preloadImages) {
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var thumb_options = $.extend({}, eval("(" + $.trim($(this).attr('rel')) + ")"));
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thumb_preload[i] = new Image();
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thumb_preload[i].src = thumb_options.largeimage;
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i++;
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}
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$(this).click(function (e) {
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if($(this).hasClass('zoomThumbActive')){
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return false;
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}
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thumblist.each(function () {
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$(this).removeClass('zoomThumbActive');
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});
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e.preventDefault();
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obj.swapimage(this);
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return false;
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});
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});
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},
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load: function () {
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if (el.largeimageloaded == false && el.largeimageloading == false) {
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var url = $(el).attr('href');
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el.largeimageloading = true;
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largeimage.loadimage(url);
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}
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},
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activate: function (e) {
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clearTimeout(el.timer);
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//show lens and zoomWindow
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lens.show();
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stage.show();
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},
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deactivate: function (e) {
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switch (settings.zoomType) {
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case 'drag':
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//nothing or lens.setcenter();
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break;
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default:
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img.attr('title', el.imagetitle);
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$(el).attr('title', el.title);
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if (settings.alwaysOn) {
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lens.setcenter();
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} else {
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stage.hide();
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lens.hide();
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}
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break;
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}
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el.zoom_active = false;
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},
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swapimage: function (link) {
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el.largeimageloading = false;
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el.largeimageloaded = false;
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var options = new Object();
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options = $.extend({}, eval("(" + $.trim($(link).attr('rel')) + ")"));
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if (options.smallimage && options.largeimage) {
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var smallimage = options.smallimage;
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var largeimage = options.largeimage;
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$(link).addClass('zoomThumbActive');
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$(el).attr('href', largeimage);
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img.attr('src', smallimage);
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lens.hide();
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stage.hide();
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obj.load();
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} else {
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throw 'ERROR :: Missing parameter for largeimage or smallimage.';
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}
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return false;
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}
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});
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//sometimes image is already loaded and onload will not fire
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if (img[0].complete) {
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//fetching data from sallimage if was previously loaded
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smallimage.fetchdata();
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if ($(".zoomPad", el).length == 0) obj.create();
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}
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/*========================================================,
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| Smallimage
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|---------------------------------------------------------:
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| Base image into the anchor element
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`========================================================*/
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function Smallimage(image) {
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var $obj = this;
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this.node = image[0];
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this.findborder = function () {
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var bordertop = 0;
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bordertop = image.css('border-top-width');
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btop = '';
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var borderleft = 0;
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borderleft = image.css('border-left-width');
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bleft = '';
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if (bordertop) {
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for (i = 0; i < 3; i++) {
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var x = [];
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x = bordertop.substr(i, 1);
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if (isNaN(x) == false) {
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btop = btop + '' + bordertop.substr(i, 1);
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} else {
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break;
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}
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}
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}
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if (borderleft) {
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for (i = 0; i < 3; i++) {
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if (!isNaN(borderleft.substr(i, 1))) {
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bleft = bleft + borderleft.substr(i, 1)
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} else {
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break;
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}
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}
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}
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$obj.btop = (btop.length > 0) ? eval(btop) : 0;
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$obj.bleft = (bleft.length > 0) ? eval(bleft) : 0;
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};
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this.fetchdata = function () {
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$obj.findborder();
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$obj.w = image.width();
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$obj.h = image.height();
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$obj.ow = image.outerWidth();
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$obj.oh = image.outerHeight();
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$obj.pos = image.offset();
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$obj.pos.l = image.offset().left + $obj.bleft;
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$obj.pos.t = image.offset().top + $obj.btop;
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$obj.pos.r = $obj.w + $obj.pos.l;
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$obj.pos.b = $obj.h + $obj.pos.t;
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$obj.rightlimit = image.offset().left + $obj.ow;
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$obj.bottomlimit = image.offset().top + $obj.oh;
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};
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this.node.onerror = function () {
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throw 'Problems while loading image.';
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};
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this.node.onload = function () {
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$obj.fetchdata();
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if ($(".zoomPad", el).length == 0) obj.create();
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};
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return $obj;
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};
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/*========================================================,
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| Loader
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|---------------------------------------------------------:
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| Show that the large image is loading
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`========================================================*/
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function Loader() {
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var $obj = this;
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this.append = function () {
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this.node = $('<div/>').addClass('zoomPreload').css('visibility', 'hidden').html(settings.preloadText);
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$('.zoomPad', el).append(this.node);
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};
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this.show = function () {
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this.node.top = (smallimage.oh - this.node.height()) / 2;
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this.node.left = (smallimage.ow - this.node.width()) / 2;
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//setting position
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this.node.css({
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top: this.node.top,
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left: this.node.left,
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position: 'absolute',
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visibility: 'visible'
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});
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};
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this.hide = function () {
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this.node.css('visibility', 'hidden');
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};
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return this;
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}
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/*========================================================,
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| Lens
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|---------------------------------------------------------:
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| Lens over the image
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`========================================================*/
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function Lens() {
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var $obj = this;
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this.node = $('<div/>').addClass('zoomPup');
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//this.nodeimgwrapper = $("<div/>").addClass('zoomPupImgWrapper');
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this.append = function () {
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$('.zoomPad', el).append($(this.node).hide());
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if (settings.zoomType == 'reverse') {
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this.image = new Image();
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this.image.src = smallimage.node.src; // fires off async
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$(this.node).empty().append(this.image);
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}
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};
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this.setdimensions = function () {
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this.node.w = (parseInt((settings.zoomWidth) / el.scale.x) > smallimage.w ) ? smallimage.w : (parseInt(settings.zoomWidth / el.scale.x));
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this.node.h = (parseInt((settings.zoomHeight) / el.scale.y) > smallimage.h ) ? smallimage.h : (parseInt(settings.zoomHeight / el.scale.y));
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this.node.top = (smallimage.oh - this.node.h - 2) / 2;
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this.node.left = (smallimage.ow - this.node.w - 2) / 2;
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//centering lens
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this.node.css({
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top: 0,
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left: 0,
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width: this.node.w + 'px',
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height: this.node.h + 'px',
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position: 'absolute',
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display: 'none',
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borderWidth: 1 + 'px'
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});
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if (settings.zoomType == 'reverse') {
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this.image.src = smallimage.node.src;
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$(this.node).css({
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'opacity': 1
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});
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$(this.image).css({
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position: 'absolute',
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display: 'block',
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left: -(this.node.left + 1 - smallimage.bleft) + 'px',
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top: -(this.node.top + 1 - smallimage.btop) + 'px'
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});
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}
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};
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this.setcenter = function () {
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//calculating center position
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this.node.top = (smallimage.oh - this.node.h - 2) / 2;
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this.node.left = (smallimage.ow - this.node.w - 2) / 2;
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//centering lens
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this.node.css({
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top: this.node.top,
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left: this.node.left
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});
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if (settings.zoomType == 'reverse') {
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$(this.image).css({
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position: 'absolute',
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display: 'block',
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left: -(this.node.left + 1 - smallimage.bleft) + 'px',
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top: -(this.node.top + 1 - smallimage.btop) + 'px'
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});
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}
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//centering large image
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largeimage.setposition();
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};
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this.setposition = function (e) {
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el.mousepos.x = e.pageX;
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el.mousepos.y = e.pageY;
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var lensleft = 0;
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var lenstop = 0;
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function overleft(lens) {
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return el.mousepos.x - (lens.w) / 2 < smallimage.pos.l;
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}
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function overright(lens) {
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return el.mousepos.x + (lens.w) / 2 > smallimage.pos.r;
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}
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function overtop(lens) {
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return el.mousepos.y - (lens.h) / 2 < smallimage.pos.t;
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}
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function overbottom(lens) {
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return el.mousepos.y + (lens.h) / 2 > smallimage.pos.b;
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}
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lensleft = el.mousepos.x + smallimage.bleft - smallimage.pos.l - (this.node.w + 2) / 2;
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lenstop = el.mousepos.y + smallimage.btop - smallimage.pos.t - (this.node.h + 2) / 2;
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if (overleft(this.node)) {
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lensleft = smallimage.bleft - 1;
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} else if (overright(this.node)) {
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lensleft = smallimage.w + smallimage.bleft - this.node.w - 1;
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}
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if (overtop(this.node)) {
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lenstop = smallimage.btop - 1;
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} else if (overbottom(this.node)) {
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lenstop = smallimage.h + smallimage.btop - this.node.h - 1;
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}
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this.node.left = lensleft;
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this.node.top = lenstop;
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this.node.css({
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'left': lensleft + 'px',
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'top': lenstop + 'px'
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});
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if (settings.zoomType == 'reverse') {
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if ($.browser.msie && $.browser.version > 7) {
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$(this.node).empty().append(this.image);
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}
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$(this.image).css({
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position: 'absolute',
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display: 'block',
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left: -(this.node.left + 1 - smallimage.bleft) + 'px',
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top: -(this.node.top + 1 - smallimage.btop) + 'px'
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});
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}
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largeimage.setposition();
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};
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this.hide = function () {
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img.css({
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'opacity': 1
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});
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this.node.hide();
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};
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this.show = function () {
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|
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if (settings.zoomType != 'innerzoom' && (settings.lens || settings.zoomType == 'drag')) {
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this.node.show();
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}
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|
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if (settings.zoomType == 'reverse') {
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img.css({
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'opacity': settings.imageOpacity
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});
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}
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};
|
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this.getoffset = function () {
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var o = {};
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o.left = $obj.node.left;
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o.top = $obj.node.top;
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return o;
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};
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return this;
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};
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/*========================================================,
|
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| Stage
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|---------------------------------------------------------:
|
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| Window area that contains the large image
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`========================================================*/
|
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|
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function Stage() {
|
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var $obj = this;
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this.node = $("<div class='zoomWindow'><div class='zoomWrapper'><div class='zoomWrapperTitle'></div><div class='zoomWrapperImage'></div></div></div>");
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this.ieframe = $('<iframe class="zoomIframe" src="javascript:\'\';" marginwidth="0" marginheight="0" align="bottom" scrolling="no" frameborder="0" ></iframe>');
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this.setposition = function () {
|
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this.node.leftpos = 0;
|
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this.node.toppos = 0;
|
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if (settings.zoomType != 'innerzoom') {
|
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//positioning
|
|
switch (settings.position) {
|
|
case "left":
|
|
this.node.leftpos = (smallimage.pos.l - smallimage.bleft - Math.abs(settings.xOffset) - settings.zoomWidth > 0) ? (0 - settings.zoomWidth - Math.abs(settings.xOffset)) : (smallimage.ow + Math.abs(settings.xOffset));
|
|
this.node.toppos = Math.abs(settings.yOffset);
|
|
break;
|
|
case "top":
|
|
this.node.leftpos = Math.abs(settings.xOffset);
|
|
this.node.toppos = (smallimage.pos.t - smallimage.btop - Math.abs(settings.yOffset) - settings.zoomHeight > 0) ? (0 - settings.zoomHeight - Math.abs(settings.yOffset)) : (smallimage.oh + Math.abs(settings.yOffset));
|
|
break;
|
|
case "bottom":
|
|
this.node.leftpos = Math.abs(settings.xOffset);
|
|
this.node.toppos = (smallimage.pos.t - smallimage.btop + smallimage.oh + Math.abs(settings.yOffset) + settings.zoomHeight < screen.height) ? (smallimage.oh + Math.abs(settings.yOffset)) : (0 - settings.zoomHeight - Math.abs(settings.yOffset));
|
|
break;
|
|
default:
|
|
this.node.leftpos = (smallimage.rightlimit + Math.abs(settings.xOffset) + settings.zoomWidth < screen.width) ? (smallimage.ow + Math.abs(settings.xOffset)) : (0 - settings.zoomWidth - Math.abs(settings.xOffset));
|
|
this.node.toppos = Math.abs(settings.yOffset);
|
|
break;
|
|
}
|
|
}
|
|
this.node.css({
|
|
'left': this.node.leftpos + 'px',
|
|
'top': this.node.toppos + 'px'
|
|
});
|
|
return this;
|
|
};
|
|
this.append = function () {
|
|
$('.zoomPad', el).append(this.node);
|
|
this.node.css({
|
|
position: 'absolute',
|
|
display: 'none',
|
|
zIndex: 5001
|
|
});
|
|
if (settings.zoomType == 'innerzoom') {
|
|
this.node.css({
|
|
cursor: 'default'
|
|
});
|
|
var thickness = (smallimage.bleft == 0) ? 1 : smallimage.bleft;
|
|
$('.zoomWrapper', this.node).css({
|
|
borderWidth: thickness + 'px'
|
|
});
|
|
}
|
|
|
|
$('.zoomWrapper', this.node).css({
|
|
width: Math.round(settings.zoomWidth) + 'px' ,
|
|
borderWidth: thickness + 'px'
|
|
});
|
|
|
|
$('.zoomWrapperImage', this.node).css({
|
|
width: '100%',
|
|
height: Math.round(settings.zoomHeight) + 'px'
|
|
});
|
|
//zoom title
|
|
$('.zoomWrapperTitle', this.node).css({
|
|
width: '100%',
|
|
position: 'absolute'
|
|
});
|
|
|
|
$('.zoomWrapperTitle', this.node).hide();
|
|
if (settings.title && zoomtitle.length > 0) {
|
|
$('.zoomWrapperTitle', this.node).html(zoomtitle).show();
|
|
}
|
|
$obj.setposition();
|
|
};
|
|
this.hide = function () {
|
|
switch (settings.hideEffect) {
|
|
case 'fadeout':
|
|
this.node.fadeOut(settings.fadeoutSpeed, function () {});
|
|
break;
|
|
default:
|
|
this.node.hide();
|
|
break;
|
|
}
|
|
this.ieframe.hide();
|
|
};
|
|
this.show = function () {
|
|
switch (settings.showEffect) {
|
|
case 'fadein':
|
|
this.node.fadeIn();
|
|
this.node.fadeIn(settings.fadeinSpeed, function () {});
|
|
break;
|
|
default:
|
|
this.node.show();
|
|
break;
|
|
}
|
|
if (isIE6 && settings.zoomType != 'innerzoom') {
|
|
this.ieframe.width = this.node.width();
|
|
this.ieframe.height = this.node.height();
|
|
this.ieframe.left = this.node.leftpos;
|
|
this.ieframe.top = this.node.toppos;
|
|
this.ieframe.css({
|
|
display: 'block',
|
|
position: "absolute",
|
|
left: this.ieframe.left,
|
|
top: this.ieframe.top,
|
|
zIndex: 99,
|
|
width: this.ieframe.width + 'px',
|
|
height: this.ieframe.height + 'px'
|
|
});
|
|
$('.zoomPad', el).append(this.ieframe);
|
|
this.ieframe.show();
|
|
};
|
|
};
|
|
};
|
|
/*========================================================,
|
|
| LargeImage
|
|
|---------------------------------------------------------:
|
|
| The large detailed image
|
|
`========================================================*/
|
|
|
|
function Largeimage() {
|
|
var $obj = this;
|
|
this.node = new Image();
|
|
this.loadimage = function (url) {
|
|
//showing preload
|
|
loader.show();
|
|
this.url = url;
|
|
this.node.style.position = 'absolute';
|
|
this.node.style.border = '0px';
|
|
this.node.style.display = 'none';
|
|
this.node.style.left = '-5000px';
|
|
this.node.style.top = '0px';
|
|
document.body.appendChild(this.node);
|
|
this.node.src = url; // fires off async
|
|
};
|
|
this.fetchdata = function () {
|
|
var image = $(this.node);
|
|
var scale = {};
|
|
this.node.style.display = 'block';
|
|
$obj.w = image.width();
|
|
$obj.h = image.height();
|
|
$obj.pos = image.offset();
|
|
$obj.pos.l = image.offset().left;
|
|
$obj.pos.t = image.offset().top;
|
|
$obj.pos.r = $obj.w + $obj.pos.l;
|
|
$obj.pos.b = $obj.h + $obj.pos.t;
|
|
scale.x = ($obj.w / smallimage.w);
|
|
scale.y = ($obj.h / smallimage.h);
|
|
el.scale = scale;
|
|
document.body.removeChild(this.node);
|
|
$('.zoomWrapperImage', el).empty().append(this.node);
|
|
//setting lens dimensions;
|
|
lens.setdimensions();
|
|
};
|
|
this.node.onerror = function () {
|
|
throw 'Problems while loading the big image.';
|
|
};
|
|
this.node.onload = function () {
|
|
//fetching data
|
|
$obj.fetchdata();
|
|
loader.hide();
|
|
el.largeimageloading = false;
|
|
el.largeimageloaded = true;
|
|
if (settings.zoomType == 'drag' || settings.alwaysOn) {
|
|
lens.show();
|
|
stage.show();
|
|
lens.setcenter();
|
|
}
|
|
};
|
|
this.setposition = function () {
|
|
var left = -el.scale.x * (lens.getoffset().left - smallimage.bleft + 1);
|
|
var top = -el.scale.y * (lens.getoffset().top - smallimage.btop + 1);
|
|
$(this.node).css({
|
|
'left': left + 'px',
|
|
'top': top + 'px'
|
|
});
|
|
};
|
|
return this;
|
|
};
|
|
$(el).data("jqzoom", obj);
|
|
};
|
|
//es. $.jqzoom.disable('#jqzoom1');
|
|
$.jqzoom = {
|
|
defaults: {
|
|
zoomType: 'standard',
|
|
//innerzoom/standard/reverse/drag
|
|
zoomWidth: 300,
|
|
//zoomWindow default width
|
|
zoomHeight: 300,
|
|
//zoomWindow default height
|
|
xOffset: 10,
|
|
//zoomWindow x offset, can be negative(more on the left) or positive(more on the right)
|
|
yOffset: 0,
|
|
//zoomWindow y offset, can be negative(more on the left) or positive(more on the right)
|
|
position: "right",
|
|
//zoomWindow default position
|
|
preloadImages: true,
|
|
//image preload
|
|
preloadText: 'Loading zoom',
|
|
title: true,
|
|
lens: true,
|
|
imageOpacity: 0.4,
|
|
alwaysOn: false,
|
|
showEffect: 'show',
|
|
//show/fadein
|
|
hideEffect: 'hide',
|
|
//hide/fadeout
|
|
fadeinSpeed: 'slow',
|
|
//fast/slow/number
|
|
fadeoutSpeed: '2000' //fast/slow/number
|
|
},
|
|
disable: function (el) {
|
|
var api = $(el).data('jqzoom');
|
|
api.disable();
|
|
return false;
|
|
},
|
|
enable: function (el) {
|
|
var api = $(el).data('jqzoom');
|
|
api.enable();
|
|
return false;
|
|
},
|
|
disableAll: function (el) {
|
|
jqzoompluging_disabled = true;
|
|
},
|
|
enableAll: function (el) {
|
|
jqzoompluging_disabled = false;
|
|
}
|
|
};
|
|
})(jQuery); |