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    基于jQuery的试卷自动排版系统实现代码_jquery

    2016-05-16 18:12:36原创653
    根据提供的试卷题目(是一个干净的只有“数据”的HTML网页)生成一份多页的试卷,用户能执行翻页、具有答题时间限制,展示给用户的试卷中题目需要占用尽量少的空间(比如选择题中把两条较短的选项由两行合并到一行)、同一道题目不要跨页面显示以方便答题者,管理员能够改变试卷的样式(字体、颜色、行距、页面边距,像字处理软件一样……),题目之间可以插入一些说明性的文字(比如告知答题者作答的须知等等)。题目提干、选择题的选项、说明文字可以包含多媒体信息(文字、图片、列表、表格、视频等等……)。选择题选项数目不限、单选多选不限。翻页要有可订制的动画效果

    提供的试卷样板类似如下(Input):
    复制代码 代码如下:


      选择题:说明文字。说明文字。说明文字。说明文字。说明文字。说明文字。说明文字。说明文字。说明文字。说明文字。说明文字。说明文字。说明文字。说明文字。


    1. 1.你认为怎样的老师是好老师?









    2. 2.一位有15年教龄的英语教师,教了多年高三,可谓学校的核心骨干。一次接受邀请到外校介绍教学经验,台下有老师发表了观点并问到几个英语教法发面的问题,一下子把她给卡住了。这是因为









    3. 3.哪张图片最好看?









    4. 填空题和选择题:一大堆的说明文字。一大堆的说明文字。一大堆的说明文字。一大堆的说明文字。一大堆的说明文字。


    5. 4.床前明月光,



    6. 5.你认为怎样的老师是好老师?














    思路
    面对这种需求该怎么办呢?使用JavaScript了,看来。后来决定用jQuery,Aptana作IDE(虽然jQuery支持库在Windows上死活装不上去,换了个OS就好了,奇怪),格式么就用CSS了。

    具体步骤:

    导入试卷题目HTML
    对所有选择题进行排版,把一行划分为四个位置,使选项尽量适应一个位置、两个位置或四个位置(也就是一行四项、一行两项或者一行一项的效果)
    对所有题目进行分页
    思路还是清晰的,但是由于浏览器众多,还是比较麻烦的,并且我是新手,没接触过jQuery之前……

    实现
    页面文件(和例子不同,但是格式一样的)
    复制代码 代码如下:




    No title...








    PrevPage

    NextPage

    Loading the test...






      left


      right



      选择题:说明文字。说明文字。说明文字。说明文字。说明文字。说明文字。说明文字。说明文字。说明文字。说明文字。说明文字。说明文字。说明文字。说明文字。


    1. 1你认为怎样的老师是好老师?









    2. 2你认为怎样的老师是好老师?









    3. 3你认为怎样的老师是好老师?









    4. 4你认为怎样的老师是好老师?








    5. 还是选择题:一大堆的说明文字。一大堆的说明文字。一大堆的说明文字。一大堆的说明文字。一大堆的说明文字。


    6. 5你认为怎样的老师是好老师?









    7. 5你认为怎样的老师是好老师?









    8. 6你认为怎样的老师是好老师?

















    样式文件(CSS)
    复制代码 代码如下:

    /* YahooUI CSS Reset */
    body,div,dl,dt,dd,ul,ol,li,h1,h2,h3,h4,h5,h6,pre,form,fieldset,input,textarea,p,blockquote,th,td { padding: 0; margin: 0; }
    table { border-collapse: collapse; border-spacing: 0; }
    fieldset,img { border: 0; }
    address,caption,cite,code,dfn,em,strong,th,var { font-weight: normal; font-style: normal; }
    ol,ul { list-style: none; }
    caption,th { text-align: left; }
    h1,h2,h3,h4,h5,h6 { font-weight: normal; font-size: 100%; }
    q:before,q:after { content:''; }
    abbr,acronym { border: 0;}

    label { padding: 0; margin: 0; }

    /* My css */
    .Choices { line-height: 150%; margin: 5px 0; }
    .Page { height: 500px; border: solid 1px gray; }
    #olThePaper, .Display { padding: 0; width: 500px; }
    /* NOTICE: the width of .Display and #olThePaper should be the SAME. */
    .Display { float: left; }

    #divToolbar { height: 35px; }
    #divPrev, #divNext { float: left; width: 100px; height: 30px; border: solid 1px green; background-color: #999999; }
    #divPageInfo { float: left; width: 100px; height: 30px; }
    #divTimer { float: left; width: 500px; height: 30px; }


    /*for debugging... perhaps for non-IE only*/
    /**label { outline: dotted 1px red; background-color: gray; }**/
    /**div {outline: dashed 1px blue;}**/

    下面是重点,TTestPaperProcessor.js:
    复制代码 代码如下:

    /**
    *
    * @param {String} PaperOlId the id value of the ol tags indicating pages.
    * @param {String} ProblemClass the css class name for problem area.
    * @param {String} DescClass the css class name for description area.
    * @param {String} ChoicesClass the css class name for choices area.
    * @param {String} LeftPageId the id of the left page.
    * @param {String} RightPageId the id of the right page.
    * @author ExSystem
    */
    function TTestPaperProcessor(PaperOlId, ProblemClass, DescClass, ChoicesClass, LeftPageId, RightPageId) {
    this.FPaperOlId = PaperOlId;
    this.FProblemClass = ProblemClass;
    this.FDescClass = DescClass;
    this.FChoicesClass = ChoicesClass;
    this.FLeftPageId = LeftPageId;
    this.FRightPageId =RightPageId;
    $('#' + this.FLeftPageId).html('');
    $('#' + this.FRightPageId).html('');
    this._FormatProblemOptions();
    this._DivideIntoPages();
    this.setCurrPage(1);
    }

    TTestPaperProcessor.prototype = {
    FPaperOlId: '', //the id property of the ol tag contains the whole test paper.
    FProblemClass: '', //the css class name for problem area.
    FDescClass: '', //the css class name for description area.
    FChoicesClass: '', //the css class name for choices area.
    FLeftPageId: '', //the left page.
    FRightPageId: '', //the right page.
    CPageClass: 'Page',
    FIsDisplayTableSupported: null, //whether the browser is the EVIL M$IE6,7 that does not support display: table(-cell).
    FCurrPage: 0, //start from 1, 0 for no page has been displayed yet.
    FPageCount: 0, //page count.
    // /**
    // * Get external css stylesheet info.
    // * @param {String} Selector The selector in the css style sheet.
    // * @param {String} Property The property name.
    // * @return {String} The value of the property, or null for undefined property.
    // */
    // _GetCssInfo: function(Selector, Property) {
    // var mCss = document.styleSheets[0].cssRules || document.styleSheets[0].rules;
    // for (var mIndex = 0; mIndex < mCss.length; ++mIndex) {
    // if (mCss[mIndex].selectorText.toLowerCase() == Selector) {
    // return mCss[mIndex].style[Property];
    // }
    // }
    // return null;
    // },

    /**
    * @return {Boolean}
    */
    _IsDisplayTableSupported: function() {
    if (this.FIsDisplayTableSupported != null) {
    return this.FIsDisplayTableSupported;
    }

    this.FIsDisplayTableSupported = !(jQuery.browser.msie && jQuery.browser.version < 8.0);
    return this.FIsDisplayTableSupported;
    },

    /**
    * Formats radios and checkboxes for the Choices quiz.
    */
    _FormatProblemOptions: function() {
    var mThis = this;
    var mSelector = '.' + this.FProblemClass + ' .' + this.FChoicesClass;
    $(mSelector).each(function() {
    //Rearrange the options for each problem ordered by offsetWidth of the label tag.
    var mLabels = new Array();
    mLabels = jQuery.makeArray($('label', this));
    mLabels.sort(function(First, Second) {
    return $(Second).outerWidth(true) > $(First).outerWidth(true);
    });
    $(mLabels).appendTo(this);

    //Layout the options into the appropreate form.
    var mSlots = -1; //Force to create a new row, inside the while() loop.
    var mSlotWidth = $(mSelector).width() / 4.0;
    var mCellSize = 0;
    if (mThis._IsDisplayTableSupported()) {
    while (mLabels.length > 0) {
    //alert($(mLabels[0]).outerWidth(true) + '::' + $(mLabels[0]).outerHeight(true) + '::' + $(mLabels[0]).html());
    if (mSlots <= 0) { //If no empty slot, create a new row.
    mCurrRow = $('
    ');
    mCurrRow.appendTo(this);
    mSlots = 4;
    mCellSize = 0;

    var mRealCellWidth = $(mLabels[0]).outerWidth(true);
    if (mRealCellWidth < mSlotWidth) {
    mCellSize = 1;
    }
    if (mRealCellWidth >= mSlotWidth && mRealCellWidth < mSlotWidth * 2) {
    mCellSize = 2;
    }
    if (mRealCellWidth >= mSlotWidth * 2) {
    mCellSize = 4;
    }
    }
    mSlots -= mCellSize;
    if (mSlots >= 0) { //If empty slots exists, put the cell into the row.
    mLabel = mLabels.shift();
    $(mLabel).addClass('___cell');
    $(mLabel).css('display', 'table-cell');
    $(mLabel).appendTo(mCurrRow);
    }
    }
    $('.___table').each(function() { //Align all the tables and cells.
    $(this).css('width', '100%');
    var mCellWidth = 100 / $('.___cell', this).length;
    $('.___cell', this).css('width', mCellWidth + '%');
    });
    }
    else { // for the evil M$IE6, use table, tr, td tags.
    while (mLabels.length > 0) {
    if (mSlots <= 0) { //If no empty slot, create a new row.
    mCurrRow = $('
    ');
    mRow = $('');
    mRow.appendTo(mCurrRow);
    mCurrRow.appendTo(this);
    mSlots = 4;
    mCellSize = 0;

    var mRealCellWidth = $(mLabels[0]).attr('offsetWidth');
    //The EVIL IE only:
    //be sure to use this css reset: table { border-collapse: collapse; border-spacing: 0; }
    //otherwise, 2 lines will be occupied by some long problem options instead of 1.
    //or use this code instead: var mRealCellWidth = $(mLabels[0]).attr('offsetWidth') * 1.3;
    if (mRealCellWidth <= mSlotWidth) {
    mCellSize = 1;
    }
    if (mRealCellWidth > mSlotWidth && mRealCellWidth <= mSlotWidth * 2) {
    mCellSize = 2;
    }
    if (mRealCellWidth > mSlotWidth * 2) {
    mCellSize = 4;
    }
    }
    mSlots -= mCellSize;
    if (mSlots >= 0) { //If empty slots exists, put the cell into the row.
    mLabel = mLabels.shift();
    mCell = $('');
    $(mLabel).appendTo(mCell);
    mCell.appendTo($('tr', mCurrRow)[0]);
    }
    }
    $('.___table').each(function() { //Align all the tables and cells.
    $(this).css('width', '100%');
    var mCellWidth = 100 / $('tbody tr .___cell', this).length;
    $('tbody tr .___cell', this).css('width', mCellWidth + '%');
    });
    }
    });
    },

    /**
    * Create a new page, and add it to the paper.
    * @return {jQuery} the new page.
    */
    _CreateNewPage: function() {
    ++this.FPageCount;

    mPage = $('
    ');
    mPage.appendTo($('#' + this.FPaperOlId));

    return mPage;
    },

    /**
    *
    * @param {Number} PageNumber
    * @return {jQuery}
    */
    _GetPage: function(PageNumber) {
    if (PageNumber < 1 || PageNumber > this.FPageCount) {
    throw new Error('invalid page number: ' + PageNumber + '.');
    }
    return $('#___page_' + PageNumber);
    },

    /**
    *
    */
    _DivideIntoPages: function() {
    var mProblems = $('.' + this.FProblemClass + ', .' + this.FDescClass);
    var mProblemsCount = mProblems.length;
    var mCurrPage = this._CreateNewPage();
    //var mPageHeight = mCurrPage.attr('offsetHeight'); chrome: sometimes 0. safari: always 0, IF PUTTED IN $(window).ready().
    var mPageHeight = mCurrPage.outerHeight(true); //the same as the code above. FIX: PUT IT INTO $(window).load().
    var mUsedPageHeight = 0;
    for (var mCurrProblem = 0; mCurrProblem < mProblemsCount; ++mCurrProblem) {
    if (mUsedPageHeight + $(mProblems[mCurrProblem]).outerHeight(true) > mPageHeight) {
    mCurrPage.hide();
    mCurrPage = this._CreateNewPage();
    mPageHeight = mCurrPage.outerHeight(true);
    mUsedPageHeight = 0;
    }
    $(mProblems[mCurrProblem]).appendTo(mCurrPage);
    mUsedPageHeight += $(mProblems[mCurrProblem]).outerHeight(true);
    }
    mCurrPage.hide();
    },
    /**
    * Get the current page of the left side, started from 1.
    * @return {Number} The current page.
    */
    getCurrPage: function() {
    if (this.FPageCount == 0) {
    throw new Error('No page has been created yet.');
    }
    return this.FCurrPage;
    },
    /**
    * Trun to a specific page in the left side.
    * @param {Number} Value The page number.
    */
    setCurrPage: function(Value) {
    if (Value < 1 || Value > this.FPageCount) {
    throw new Error('No such page: ' + Value + '.');
    }
    this.FCurrPage = parseInt(Value / 2) * 2 + 1; // to get an odd number.
    $('#' + this.FLeftPageId + ' .' + this.CPageClass).hide();
    $('#' + this.FRightPageId + ' .' + this.CPageClass).hide();
    if (this.FCurrPage >= 0) {
    $('#___page_' + this.FCurrPage).appendTo($('#' + this.FLeftPageId));
    $('#___page_' + this.FCurrPage).show('fast');
    if (this.FCurrPage < this.FPageCount) {
    ++this.FCurrPage;
    $('#___page_' + this.FCurrPage).appendTo($('#' + this.FRightPageId));
    $('#___page_' + this.FCurrPage).show('fast');
    --this.FCurrPage;
    }
    }
    },
    /**
    * @retrun {Number}
    */
    getPageCount: function() {
    return this.FPageCount;
    },
    /**
    *
    */
    Prev: function() {
    this.setCurrPage(this.FCurrPage - 2);
    },
    /**
    *
    */
    Next: function() {
    this.setCurrPage(this.FCurrPage + 2);
    }
    };

    //client code goes here...
    $(window).load(function() {
    var obj = new TTestPaperProcessor('olThePaper', 'Problem', 'Desc', 'Choices', 'divLeft', 'divRight');
    $('#divPrev').click(function() {
    try {
    obj.Prev();
    $('#divPageInfo').text(obj.getCurrPage() + ' of ' + obj.getPageCount());
    }
    catch (e) {
    alert('No such page!');
    }
    });
    $('#divNext').click(function() {
    try {
    obj.Next();
    $('#divPageInfo').text(obj.getCurrPage() + ' of ' + obj.getPageCount());
    }
    catch (e) {
    alert('No such page!');
    }
    });
    //USAGE: http://keith-wood.name/countdown.html
    function TimeUp() {
    $('#formPaper').submit();
    }
    $('#divTimer').countdown({
    until: '+90m',
    compact: true,
    format: 'HMS',
    description: '',
    onExpiry: TimeUp
    });
    $('#divPageInfo').text(obj.getCurrPage() + ' of ' + obj.getPageCount());
    });

    嘿嘿,其实这是一个俺们学校一位博导老师的项目的一部分~~托给我做了。
    测试代码打包http://xiazai.jb51.net/201101/yuanma/TestPaperProcessor.rar
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