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feat: Reimplement zooming image tool
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| metadata: | ||
| display_name: Zooming Image Tool | ||
| data: | | ||
| <h3 class="hd hd-2">Zooming Image Tool</h3> | ||
| <p>Use the Zooming Image Tool to enable learners to see details of large, complex images.</p> | ||
| <p>With the Zooming Image Tool, the learner can move the mouse pointer over a part of the image to enlarge it and see more detail.</p> | ||
| <p>To use the Zooming Image Tool, add both the regular and magnified image files to your course.</p> | ||
| <p>The following HTML code shows the format required to use the Zooming Image tool. For the example in this template, you must replace the values in <i>italics</i>.</p> | ||
| <pre> | ||
| <div class="zooming-image-place" style="position: relative;"> | ||
| <a class="loupe" href="<i>path to the magnified version of the image</i>"> | ||
| <img alt="<i>Text for screen readers</i>" | ||
| src="<i>path to the image you want to display in the unit</i>" /> | ||
| </a> | ||
| </pre> | ||
| <p>You can modify the example below for your own use.</p> | ||
| <ol> | ||
| <li>Replace the value of the link's <strong>href</strong> attribute with the path to the magnified image. Do not change the value of the class attribute.</li> | ||
| <li>Replace the value of the image's <strong>src</strong> attribute with the path to the image that will appear in the unit.</li> | ||
| <li>Replace the value of the image's <strong>alt</strong> attribute with text that both describes the image and the action or destination of clicking on the image. You <strong>must</strong> include alt text to provide an accessible label.</li> | ||
| </ol> | ||
| <p>The example below shows a subset of the biochemical reactions that cells carry out. </p> | ||
| <p>You can view the chemical structures of the molecules by clicking on them. The magnified view also lists the enzymes involved in each step.</p> | ||
| <p class="sr">Press spacebar to open the magnifier.</p> | ||
| <div class="zooming-image-place" style="position: relative;"> | ||
| <a class="loupe" href="https://studio.edx.org/c4x/edX/DemoX/asset/pathways_detail_01.png"> | ||
| <img alt="magnify" src="https://studio.edx.org/c4x/edX/DemoX/asset/pathways_detail_01.png" /> | ||
| </a> | ||
| </div> | ||
| <script type="text/javascript">// <![CDATA[ | ||
| /* | ||
| jQuery loupeAndLightbox Plugin | ||
| * Version 1.0 | ||
| * 05-10-2010 | ||
| * Author: M.Biscan | ||
| * requires jQuery1.4.2 | ||
| Copyright (c) 2010 M.Biscan | ||
| Permission is hereby granted, free of charge, to any person obtaining | ||
| a copy of this software and associated documentation files (the | ||
| "Software"), to deal in the Software without restriction, including | ||
| without limitation the rights to use, copy, modify, merge, publish, | ||
| distribute, sublicense, and/or sell copies of the Software, and to | ||
| permit persons to whom the Software is furnished to do so, subject to | ||
| the following conditions: | ||
| The above copyright notice and this permission notice shall be | ||
| included in all copies or substantial portions of the Softwarevent. | ||
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | ||
| EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | ||
| MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | ||
| NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE | ||
| LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION | ||
| OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION | ||
| WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. | ||
| */ | ||
| (function($){ | ||
| $.fn.loupeAndLightbox = function(options) { | ||
| var settings = $.extend({}, $.fn.loupeAndLightbox.defaults, options); | ||
| return this.each(function() { | ||
| var $this = $(this), | ||
| $targetImage = $this.find('> img'), | ||
| $magnifiedImage = $('<img />'), | ||
| $loupe = $('<div class="larger" style="overflow: hidden;">'), | ||
| $lightbox = $('<div class="lal_lightbox">'), | ||
| $errorMessage = $('<div class="lal_errorMessage">'), | ||
| $loader = $('<div class="lal_loader">Loading...</div>'); | ||
| /////////// | ||
| // Setup // | ||
| /////////// | ||
| $this.css({ | ||
| cursor:'default' | ||
| }); | ||
| $targetImage.css({ | ||
| cursor: 'pointer' | ||
| }); | ||
| $magnifiedImage.css({ | ||
| position: 'absolute', | ||
| maxWidth: 'none' // Override Open edX's max-width default | ||
| }); | ||
| $loupe.css({ | ||
| cursor: 'none', | ||
| display: 'none', | ||
| border: settings.border, | ||
| height: settings.height, | ||
| overflow: 'hidden', | ||
| position: 'absolute', | ||
| bottom: 0, | ||
| left: -settings.width, | ||
| width: settings.width, | ||
| zIndex: settings.zIndex, | ||
| borderRadius: '50%', | ||
| background: '#FFF', | ||
| }); | ||
| $lightbox.css({ | ||
| background: '#000', | ||
| left: 0, | ||
| position: 'absolute', | ||
| top: 0, | ||
| zIndex: settings.zIndex-1, | ||
| 'opacity': 0.75, | ||
| 'filter':' alpha(opacity=75)' | ||
| }); | ||
| $errorMessage | ||
| .text(settings.errorMessage) | ||
| .css({ | ||
| height:settings.height, | ||
| width:settings.width | ||
| }); | ||
| $loader.css({ | ||
| height:settings.height, | ||
| width:settings.width | ||
| }); | ||
| //////////// | ||
| // Events // | ||
| //////////// | ||
| $this.click(function(event) { | ||
| event.preventDefault(); | ||
| }); | ||
| $targetImage.click(function(event) { | ||
| if(!$loupe.hasClass('visible')) { | ||
| var left = event.pageX, | ||
| top = event.pageY; | ||
| if(!$magnifiedImage.hasClass('appended')) { | ||
| getMagnifiedImage(); | ||
| } | ||
| setTimeout(function() { | ||
| appendLoupe(); | ||
| magnify(left, top); | ||
| if(settings.lightbox == true) { | ||
| appendLightbox(); | ||
| } | ||
| }, 100); | ||
| } | ||
| }); | ||
| $targetImage.mousemove(function(event) { | ||
| var left = event.pageX, | ||
| top = event.pageY, | ||
| offsetTop = $targetImage.offset().top-($loupe.width()/2), | ||
| offsetLeft = $targetImage.offset().left-($loupe.height()/2), | ||
| offsetBottom = $targetImage.offset().top+$targetImage.height()+($loupe.height()/2), | ||
| offsetRight = $targetImage.offset().left+$targetImage.width()+($loupe.width()/2); | ||
| if(left < offsetLeft || left > offsetRight || top < offsetTop || top > offsetBottom) { | ||
| $targetImage.css({cursor:'default'}); | ||
| } else { | ||
| $targetImage.css({cursor:'crosshair'}); | ||
| magnify(left, top); | ||
| } | ||
| }).click(function() { | ||
| detachLoupe(); | ||
| if(settings.lightbox == true) { | ||
| detachLightbox(); | ||
| } | ||
| }).mouseleave(function() { | ||
| pulseLoupe(); | ||
| }); | ||
| // Detach when clicking outside of the loupe | ||
| $(document).click(function(event) { | ||
| if($loupe.hasClass('visible')) { | ||
| detachLoupe(); | ||
| if(settings.lightbox == true) { | ||
| detachLightbox(); | ||
| } | ||
| } | ||
| }); | ||
| // Resizes lightbox with window | ||
| $(window).resize(function() { | ||
| if($loupe.is(':visible')) { | ||
| $loupe.css({ | ||
| left:$targetImage.offset().left+($targetImage.width()/2)-($loupe.width()/2), | ||
| top:$targetImage.offset().top+($targetImage.height()/2)-($loupe.height()/2) | ||
| }); | ||
| $magnifiedImage.css({ | ||
| left:-($magnifiedImage.width()/2)+($loupe.width()/2), | ||
| top:-($magnifiedImage.height()/2)+($loupe.height()/2) | ||
| }); | ||
| $lightbox.css({ | ||
| height:$(document).height(), | ||
| width:$(document).width() | ||
| }); | ||
| } | ||
| }); | ||
| /////////////////////// | ||
| // Private functions // | ||
| /////////////////////// | ||
| function magnify(left, top) { | ||
| $loupe | ||
| .css({ | ||
| left:left-(settings.width/2), | ||
| top:top-(settings.height/2) | ||
| }); | ||
| var heightDiff = $magnifiedImage.height()/$targetImage.height(), | ||
| widthDiff = $magnifiedImage.width()/$targetImage.width(), | ||
| magnifierTop = (-(top - $targetImage.offset().top)*heightDiff)+(settings.height/2), | ||
| magnifierLeft = (-(left - $targetImage.offset().left)*widthDiff)+(settings.width/2); | ||
| $magnifiedImage.css({ | ||
| top:magnifierTop, | ||
| left:magnifierLeft | ||
| }); | ||
| }; | ||
| function appendLoupe() { | ||
| $loupe | ||
| .appendTo($('div.zooming-image-place')) | ||
| .append($magnifiedImage) | ||
| .fadeIn(settings.fadeSpeed, function() { | ||
| $(this).addClass('visible'); | ||
| }); | ||
| }; | ||
| function getMagnifiedImage() { | ||
| var src = $this.attr('href'); | ||
| $loader.appendTo($loupe); | ||
| $magnifiedImage | ||
| .load(function() { | ||
| $(this).addClass('appended'); | ||
| $loader.detach(); | ||
| }) | ||
| .error(function () { | ||
| $(this).hide(); | ||
| $loupe | ||
| .append($errorMessage) | ||
| .addClass('lal_loadError'); | ||
| $loader.detach(); | ||
| }) | ||
| .attr('src', src); | ||
| }; | ||
| function detachLoupe() { | ||
| $loupe.fadeOut(settings.fadeSpeed, function() { | ||
| $(this) | ||
| .removeClass('visible') | ||
| .detach(); | ||
| }); | ||
| }; | ||
| function appendLightbox() { | ||
| $lightbox | ||
| .appendTo('body') | ||
| .css({ | ||
| height:$(document).height(), | ||
| width:$(document).width() | ||
| }) | ||
| .fadeIn(settings.fadeSpeed); | ||
| }; | ||
| function detachLightbox() { | ||
| $lightbox.fadeOut(settings.fadeSpeed, function() { | ||
| $(this).detach(); | ||
| }); | ||
| }; | ||
| function pulseLoupe() { | ||
| $loupe.fadeTo(150, 0.25, function() { | ||
| $(this).fadeTo(150, 1.0); | ||
| }); | ||
| }; | ||
| }); | ||
| }; | ||
| //////////////////// | ||
| // Default optons // | ||
| //////////////////// | ||
| $.fn.loupeAndLightbox.defaults = { | ||
| zIndex:1000, | ||
| width:150, | ||
| height:150, | ||
| border:'2px solid #ccc', | ||
| fadeSpeed:250, | ||
| lightbox:true, | ||
| errorMessage:'Image load error' | ||
| }; | ||
| })(jQuery); | ||
| JavascriptLoader.executeModuleScripts($('.zooming-image-place').eq(0), function() { | ||
| $('.loupe').loupeAndLightbox({ | ||
| width: 350, | ||
| height: 350, | ||
| lightbox: false | ||
| }); | ||
| }); | ||
| // ]]></script> | ||
| <div id="ap_listener_added"></div> |