如何在 html/css/js 中创建折叠树表?

问题描述

我有一些表格和分层的数据要显示.我想让用户能够展开和折叠节点.

I have some data to display that is both tabular and hierarchical. I'd like to let the user be able to expand and collapse the nodes.

有点像这样，除了功能性:

Sort of like this, except functional:

http://www.maxdesign.com.au/articles/tree-table/

解决此问题的最佳方法是什么?我不反对使用现成的插件.

What would be the best way to approach this? I'm not adverse to using an off-the-shelf plugin.

推荐答案

SlickGrid 有这个功能，请参阅 树演示.

SlickGrid has this functionality, see the tree demo.

如果你想自己构建，这里有一个例子(jsFiddle demo):构建您的表格带有 data-depth 属性以指示树中项目的深度(levelX CSS 类仅用于样式缩进):

If you want to build your own, here is an example (jsFiddle demo): Build your table with a data-depth attribute to indicate the depth of the item in the tree (the levelX CSS classes are just for styling indentation): 

<table id="mytable">
    <tr data-depth="0" class="collapse level0">
        <td><span class="toggle collapse"></span>Item 1</td>
        <td>123</td>
    </tr>
    <tr data-depth="1" class="collapse level1">
        <td><span class="toggle"></span>Item 2</td>
        <td>123</td>
    </tr>
</table>

然后当点击切换链接时，使用 Javascript 隐藏所有 <tr> 元素，直到找到一个相同或更少深度的 <tr>(不包括那些已经倒塌的):

Then when a toggle link is clicked, use Javascript to hide all <tr> elements until a <tr> of equal or less depth is found (excluding those already collapsed):

$(function() {
    $('#mytable').on('click', '.toggle', function () {
        //Gets all <tr>'s  of greater depth below element in the table
        var findChildren = function (tr) {
            var depth = tr.data('depth');
            return tr.nextUntil($('tr').filter(function () {
                return $(this).data('depth') <= depth;
            }));
        };

        var el = $(this);
        var tr = el.closest('tr'); //Get <tr> parent of toggle button
        var children = findChildren(tr);

        //Remove already collapsed nodes from children so that we don't
        //make them visible. 
        //(Confused? Remove this code and close Item 2, close Item 1 
        //then open Item 1 again, then you will understand)
        var subnodes = children.filter('.expand');
        subnodes.each(function () {
            var subnode = $(this);
            var subnodeChildren = findChildren(subnode);
            children = children.not(subnodeChildren);
        });

        //Change icon and hide/show children
        if (tr.hasClass('collapse')) {
            tr.removeClass('collapse').addClass('expand');
            children.hide();
        } else {
            tr.removeClass('expand').addClass('collapse');
            children.show();
        }
        return children;
    });
});

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