D3 Examples - Enlisted AFSC Grouping using Zoomable Treemap

Enlisted AFSC Grouping using Zoomable Treemap
Treemap can show a hierarchically structured data into detail. Each rectangle represents the portion of each group, and with each click, you can drill down in to more detail. In this version of the treemap, labeling only shows if the boxes are big enough or the label is short enough. If you want to move up one level, you simply click the top orange bar.
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<!DOCTYPE html>
<!--
Generic treemap, based on https://bost.ocks.org/mike/treemap/
and https://bl.ocks.org/ganeshv/6a8e9ada3ab7f2d88022
-->
<html>
<head>
<meta charset="utf-8">
<title>Map of USAF Active Duty Enlisted with CAFSC and Rank (Jan 16)</title>
<style>
​
#chart {
  background: #fff;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
}
​
.title {
    font-weight: bold;
    font-size: 24px;
    text-align: center;
    margin-top: 6px;
    margin-bottom: 6px;
}
text {
  pointer-events: none;
}
​
.grandparent text {
  font-weight: bold;
}
​
rect {
  fill: none;
  stroke: #fff;
}
​
rect.parent,
.grandparent rect {
  stroke-width: 7px;
}
​
rect.parent {
    pointer-events: none;
}
​
.grandparent rect {
  fill: orange;
}
​
.grandparent:hover rect {
  fill: #ee9700;
}
​
.children rect.parent,
.grandparent rect {
  cursor: pointer;
}
​
.children rect.parent {
  fill: #bbb;
  fill-opacity: .7;
}
​
.children:hover rect.child {
  fill: #bbb;
}
​
</style>
</head>
​
<body>
<div id="chart"></div>
​
<script src="https://code.jquery.com/jquery-1.7.2.min.js"></script>
<script src="https://d3js.org/d3.v3.min.js"></script>
<script>
​
​
window.addEventListener('message', function(e) {
    var opts = e.data.opts,
        data = e.data.data;
​
    return main(opts, data);
});
​
var defaults = {
    margin: {top: 24, right: 0, bottom: 0, left: 0},
    rootname: "TOP",
    format: ",d",
    title: "",
    width: 960,
    height: 500
};
​
function main(o, data) {
  var root,
      opts = $.extend(true, {}, defaults, o),
      formatNumber = d3.format(opts.format),
      rname = opts.rootname,
      margin = opts.margin,
      theight = 36 + 16;
​
  $('#chart').width(opts.width).height(opts.height);
  var width = opts.width - margin.left - margin.right,
      height = opts.height - margin.top - margin.bottom - theight,
      transitioning;
  
  var color = d3.scale.category20();
  
  var x = d3.scale.linear()
      .domain([0, width])
      .range([0, width]);
  
  var y = d3.scale.linear()
      .domain([0, height])
      .range([0, height]);
  
  var treemap = d3.layout.treemap()
      .children(function(d, depth) { return depth ? null : d._children; })
      .sort(function(a, b) { return a.value - b.value; })
      .ratio(height / width * 0.5 * (1 + Math.sqrt(5)))
      .round(false);
  
  var svg = d3.select("#chart").append("svg")
      .attr("width", width + margin.left + margin.right)
      .attr("height", height + margin.bottom + margin.top)
      .style("margin-left", -margin.left + "px")
      .style("margin.right", -margin.right + "px")
    .append("g")
      .attr("transform", "translate(" + margin.left + "," + margin.top + ")")
      .style("shape-rendering", "crispEdges");
  
  var grandparent = svg.append("g")
      .attr("class", "grandparent");
  
  grandparent.append("rect")
      .attr("y", -margin.top)
      .attr("width", width)
      .attr("height", margin.top);
  
  grandparent.append("text")
      .attr("x", 6)
      .attr("y", 6 - margin.top)
      .attr("dy", ".75em");
​
  if (opts.title) {
    $("#chart").prepend("<p class='title'>" + opts.title + "</p>");
  }
  if (data instanceof Array) {
    root = { key: rname, values: data };
  } else {
    root = data;
  }
    
  initialize(root);
  accumulate(root);
  layout(root);
  console.log(root);
  display(root);
​
  if (window.parent !== window) {
    var myheight = document.documentElement.scrollHeight || document.body.scrollHeight;
    window.parent.postMessage({height: myheight}, '*');
  }
​
  function initialize(root) {
    root.x = root.y = 0;
    root.dx = width;
    root.dy = height;
    root.depth = 0;
  }
​
  // Aggregate the values for internal nodes. This is normally done by the
  // treemap layout, but not here because of our custom implementation.
  // We also take a snapshot of the original children (_children) to avoid
  // the children being overwritten when when layout is computed.
  function accumulate(d) {
    return (d._children = d.values)
        ? d.value = d.values.reduce(function(p, v) { return p + accumulate(v); }, 0)
        : d.value;
  }
​
  // Compute the treemap layout recursively such that each group of siblings
  // uses the same size (1×1) rather than the dimensions of the parent cell.
  // This optimizes the layout for the current zoom state. Note that a wrapper
  // object is created for the parent node for each group of siblings so that
  // the parent’s dimensions are not discarded as we recurse. Since each group
  // of sibling was laid out in 1×1, we must rescale to fit using absolute
  // coordinates. This lets us use a viewport to zoom.
  function layout(d) {
    if (d._children) {
      treemap.nodes({_children: d._children});
      d._children.forEach(function(c) {
        c.x = d.x + c.x * d.dx;
        c.y = d.y + c.y * d.dy;
        c.dx *= d.dx;
        c.dy *= d.dy;
        c.parent = d;
        layout(c);
      });
    }
  }
​
  function display(d) {
    grandparent
        .datum(d.parent)
        .on("click", transition)
      .select("text")
        .text(name(d));
​
    var g1 = svg.insert("g", ".grandparent")
        .datum(d)
        .attr("class", "depth");
​
    var g = g1.selectAll("g")
        .data(d._children)
      .enter().append("g");
​
    g.filter(function(d) { return d._children; })
        .classed("children", true)
        .on("click", transition);
​
    var children = g.selectAll(".child")
        .data(function(d) { return d._children || [d]; })
      .enter().append("g");
​
    children.append("rect")
        .attr("class", "child")
        .call(rect)
      .append("title")
        .text(function(d) { return d.key + " (" + formatNumber(d.value) + ")"; });
    children.append("text")
        .attr("class", "ctext")
        .text(function(d) { return d.key; })
        .call(text2);
​
    g.append("rect")
        .attr("class", "parent")
        .call(rect);
​
    var t = g.append("text")
        .attr("class", "ptext")
        .attr("dy", ".75em")
​
    t.append("tspan")
        .text(function(d) { return d.key; });
    t.append("tspan")
        .attr("dy", "1.0em")
        .text(function(d) { return formatNumber(d.value); });
    t.call(text);
​
    g.selectAll("rect")
        .style("fill", function(d) { return color(d.key); });
​
    function transition(d) {
      if (transitioning || !d) return;
      transitioning = true;
​
      var g2 = display(d),
          t1 = g1.transition().duration(750),
          t2 = g2.transition().duration(750);
​
      // Update the domain only after entering new elements.
      x.domain([d.x, d.x + d.dx]);
      y.domain([d.y, d.y + d.dy]);
​
      // Enable anti-aliasing during the transition.
      svg.style("shape-rendering", null);
​
      // Draw child nodes on top of parent nodes.
      svg.selectAll(".depth").sort(function(a, b) { return a.depth - b.depth; });
​
      // Fade-in entering text.
      g2.selectAll("text").style("fill-opacity", 0);
​
      // Transition to the new view.
      t1.selectAll(".ptext").call(text).style("fill-opacity", 0);
      t1.selectAll(".ctext").call(text2).style("fill-opacity", 0);
      t2.selectAll(".ptext").call(text).style("fill-opacity", 1);
      t2.selectAll(".ctext").call(text2).style("fill-opacity", 1);
      t1.selectAll("rect").call(rect);
      t2.selectAll("rect").call(rect);
​
      // Remove the old node when the transition is finished.
      t1.remove().each("end", function() {
        svg.style("shape-rendering", "crispEdges");
        transitioning = false;
      });
    }
​
    return g;
  }
​
  function text(text) {
    text.selectAll("tspan")
        .attr("x", function(d) { return x(d.x) + 6; })
    text.attr("x", function(d) { return x(d.x) + 6; })
        .attr("y", function(d) { return y(d.y) + 6; })
        .style("opacity", function(d) { return this.getComputedTextLength() < x(d.x + d.dx) - x(d.x) ? 1 : 0; });
  }
​
  function text2(text) {
    text.attr("x", function(d) { return x(d.x + d.dx) - this.getComputedTextLength() - 6; })
        .attr("y", function(d) { return y(d.y + d.dy) - 6; })
        .style("opacity", function(d) { return this.getComputedTextLength() < x(d.x + d.dx) - x(d.x) ? 1 : 0; });
  }
​
  function rect(rect) {
    rect.attr("x", function(d) { return x(d.x); })
        .attr("y", function(d) { return y(d.y); })
        .attr("width", function(d) { return x(d.x + d.dx) - x(d.x); })
        .attr("height", function(d) { return y(d.y + d.dy) - y(d.y); });
  }
​
  function name(d) {
    return d.parent
        ? name(d.parent) + " / " + d.key + " (" + formatNumber(d.value) + ")"
        : d.key + " (" + formatNumber(d.value) + ")";
  }
}
​
if (window.location.hash === "") {
    d3.json("enlisted.json", function(err, res) {
        if (!err) {
            console.log(res);
            var data = d3.nest().key(function(d) { return d.level_1; }).key(function(d) {return d.level_2; }).key(function(d) {return d.level_3; }).key(function(d) {return d.level_4; }).entries(res);
            main({title: "Enlisted AFSC"}, {key: "Enlisted AFSC", values: data});
        }
    });
}
​
</script>
</body>
</html>
​
    