D3 Examples - Budget IV

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<!DOCTYPE html>
<meta charset="utf-8">
<style>
html {
    margin: 0;
    font-family: "Helvetica";
}
</style>
<body>
​
<script src="https://d3js.org/d3.v3.min.js"></script>
​
<body></body>
​
<script type="text/javascript">
​
var w = 1280 - 80,
    h = 800 - 180,
    x = d3.scale.linear().range([0, w]),
    y = d3.scale.linear().range([0, h]),
    color = d3.scale.category20c(),
    root,
    node;
​
var treemap = d3.layout.treemap()
    .round(false)
    .size([w, h])
    .sticky(true)
    .value(function(d) { return d.appropriation13; });
​
var svg = d3.select("body").append("div")
    .attr("class", "chart")
    .style("width", w + "px")
    .style("height", h + "px")
  .append("svg:svg")
    .attr("width", w)
    .attr("height", h)
  .append("svg:g")
    .attr("transform", "translate(.5,.5)");
​
d3.json("/darrenjaworski/raw/5389708/budget.json", function(data) {
  node = root = data;
​
  var nodes = treemap.nodes(root)
      .filter(function(d) { return !d.children; });
​
  var cell = svg.selectAll("g")
      .data(nodes)
    .enter().append("svg:g")
      .attr("class", "cell")
      .attr("transform", function(d) { return "translate(" + d.x + "," + d.y + ")"; })
      .on("click", function(d) { return zoom(node == d.parent ? root : d.parent); });
​
  cell.append("svg:rect")
      .attr("width", function(d) { return d.dx - 1; })
      .attr("height", function(d) { return d.dy - 1; })
      .style("fill", function(d) { return color(d.parent.name); });
​
  cell.append("svg:text")
      .attr("x", function(d) { return d.dx / 2; })
      .attr("y", function(d) { return d.dy / 2; })
      .attr("dy", ".35em")
      .attr("text-anchor", "middle")
      .text(function(d) { return d.name; })
      .style("opacity", function(d) { d.w = this.getComputedTextLength(); return d.dx > d.w ? 1 : 0; });
​
  d3.select(window).on("click", function() { zoom(root); });
​
});
​
function zoom(d) {
  var kx = w / d.dx, ky = h / d.dy;
  x.domain([d.x, d.x + d.dx]);
  y.domain([d.y, d.y + d.dy]);
​
  var t = svg.selectAll("g.cell").transition()
      .duration(d3.event.altKey ? 7500 : 750)
      .attr("transform", function(d) { return "translate(" + x(d.x) + "," + y(d.y) + ")"; });
​
  t.select("rect")
      .attr("width", function(d) { return kx * d.dx - 1; })
      .attr("height", function(d) { return ky * d.dy - 1; })
​
  t.select("text")
      .attr("x", function(d) { return kx * d.dx / 2; })
      .attr("y", function(d) { return ky * d.dy / 2; })
      .style("opacity", function(d) { return kx * d.dx > d.w ? 1 : 0; });
​
  node = d;
  d3.event.stopPropagation();
}
​
    </script>
​
    