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POD3 - accessing nested data for the purpose of creating a navigation tree
 

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    <p>So I have been using d3's zoom circle(<a href="http://mbostock.github.com/d3/talk/20111116/pack-hierarchy.html" rel="nofollow noreferrer">http://mbostock.github.com/d3/talk/20111116/pack-hierarchy.html</a>):</p> <p><img src="https://i.stack.imgur.com/OqgNL.gif" alt="enter image description here"></p> <p>The data is passed to the d3 script as a json array with a few different levels of arrays and objects. </p> <pre><code>object = { class: "show", name: "Game of Thrones", children : [ { class: "family", name: "Starks", children: [ { class: "members", name: "Rob" }, { class: "members", name: "Jon Snow" } ], }, { class: "family", name: "Lannisters" children: [ { class: "members", name: "Ser Jaime" }, { class: "members", name: "Cersei" } ], } ], } </code></pre> <p>I had no problem displaying the circles. I am now trying to create a navigation display on the side that maps out the hierarchy of the data. Ideally all I want is something like this:</p> <pre><code>&lt;ul&gt; &lt;li&gt; Game of Thrones &lt;ul&gt; &lt;li&gt; Starks &lt;ul&gt; &lt;li&gt; Rob &lt;/li&gt; &lt;li&gt; Jon Snow &lt;/li&gt; &lt;/ul&gt; &lt;/li&gt; &lt;li&gt; Lannisters &lt;ul&gt; &lt;li&gt; Ser Jaime &lt;/li&gt; &lt;li&gt; Cersei &lt;/li&gt; &lt;/ul&gt; &lt;/li&gt; &lt;/ul&gt; &lt;/li&gt; &lt;/ul&gt; </code></pre> <p>It's a basic list structure. The only thing I've been able to do is access 1 level down in the data. I used 'divs' to just try to the the structure down first. </p> <pre><code>var sentimentData = data.children; var navBox = d3.select("body").append("body:div"); navBox .attr("class", "navBox"); var sentimentNav = navBox.selectAll('div') .data(sentimentData) .enter() .append('div') .text(function(d){ return d.name; }); </code></pre> <p>I haven't been able to proceed anymore levels past that. I was thinking a recursive way would probably be the best way. I tried this function below but it just appended divs to the top div and not the parent node.</p> <pre><code>function buildNav(d) { if (d.children) { children = d.children; d3.select('body').append('div') .data(children) .enter() .append('div') .attr("class", function(d) {return d.name; }); children.forEach(buildNav); d._children = d.children; d.children = null; } } buildNav(data); </code></pre> <p>Any suggestions to how to append the children to their parents, or how to access data multiple levels down would be greatly appreciated. </p>
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    1. USNick DeStefano
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    1. COIf I may suggest something to you: Perhaps the title should be "D3.js - building navigation from nested data" or similar, so that it reflects better the issue, and allows easier searches... Thanks for the question!
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