Treemap
Treemap design invented by Ben Shneiderman. Squarified algorithm by Bruls, Huizing and van Wijk. Data courtesy Jeff Heer.
Source Code
1 var w = 960,
2 h = 500,
3 color = d3.scale.category20c();
4
5 var treemap = d3.layout.treemap()
6 .size([w, h])
7 .sticky(true)
8 .value(function(d) { return d.size; });
9
10 var div = d3.select("#chart").append("div")
11 .style("position", "relative")
12 .style("width", w + "px")
13 .style("height", h + "px");
14
15 d3.json("../data/flare.json", function(json) {
16 div.data([json]).selectAll("div")
17 .data(treemap.nodes)
18 .enter().append("div")
19 .attr("class", "cell")
20 .style("background", function(d) { return d.children ? color(d.name) : null; })
21 .call(cell)
22 .text(function(d) { return d.children ? null : d.name; });
23
24 d3.select("#size").on("click", function() {
25 div.selectAll("div")
26 .data(treemap.value(function(d) { return d.size; }))
27 .transition()
28 .duration(1500)
29 .call(cell);
30
31 d3.select("#size").classed("active", true);
32 d3.select("#count").classed("active", false);
33 });
34
35 d3.select("#count").on("click", function() {
36 div.selectAll("div")
37 .data(treemap.value(function(d) { return 1; }))
38 .transition()
39 .duration(1500)
40 .call(cell);
41
42 d3.select("#size").classed("active", false);
43 d3.select("#count").classed("active", true);
44 });
45 });
46
47 function cell() {
48 this
49 .style("left", function(d) { return d.x + "px"; })
50 .style("top", function(d) { return d.y + "px"; })
51 .style("width", function(d) { return d.dx - 1 + "px"; })
52 .style("height", function(d) { return d.dy - 1 + "px"; });
53 }