PieBubbles

by Avinashullal

HTML

<!DOCTYPE html>
<meta charset="utf-8">
<body>
    <!-- Original from From http://bl.ocks.org/d/1747543/ -->
<script src="http://mbostock.github.com/d3/d3.js?2.7.4"></script>
<script src="http://mbostock.github.com/d3/d3.geom.js?2.7.4"></script>
<script src="http://mbostock.github.com/d3/d3.layout.js?2.7.4"></script>
</body>
</html>

CSS

circle {
  stroke: #fff;
}

JavaScript

var margin = {top: 0, right: 0, bottom: 0, left: 0},
    width = 960 - margin.left - margin.right,
    height = 500 - margin.top - margin.bottom;

var n = 200,
    m = 4,
    padding = 6,
    radius = d3.scale.sqrt().range([0, 12]),
    color = d3.scale.category10().domain(d3.range(m));

var nodes = d3.range(n).map(function() {
  var i = Math.floor(Math.random() * m),
      v = (i + 1) / m * -Math.log(Math.random());
  return {
    radius: radius(v),
    color: color(i),
      name: "Theme " + i
  };
});

var force = d3.layout.force()
    .nodes(nodes)
    .size([width, height])
    .gravity(.02)
    .charge(0)
    .on("tick", tick)
    .start();

var svg = d3.select("body").append("svg")
    .attr("width", width + margin.left + margin.right)
    .attr("height", height + margin.top + margin.bottom)
  .append("g")
    .attr("transform", "translate(" + margin.left + "," + margin.top + ")");

/*
var circle = svg.selectAll("circle")
    .data(nodes)
  .enter().append("circle")
    .attr("r", function(d) { return d.radius; })
    .style("fill", function(d) { return d.color; })
*/
  
var circle = svg.selectAll("circle")
    .data(nodes)
  .enter()
  .append("a")
    .attr("class", "bubble-node")
    .attr("xlink:href", function(d) { return 'Javascript:alert(\"' + d.name+ '\")'; })
    .append("circle")
    .attr("r", function(d) { return d.radius; })
    .style("fill", function(d) { return d.color; })
    .text(function(d) { return d.name; })
    .style("font-size", "24px")
    .style("font-color", "#fff")
    .attr("dy", ".3em")
    .call(force.drag)
    
    
function tick(e) {
  circle
      .each(cluster(10 * e.alpha * e.alpha))
      .each(collide(.5))
      .attr("cx", function(d) { return d.x; })
      .attr("cy", function(d) { return d.y; });
}

// Move d to be adjacent to the cluster node.
function cluster(alpha) {
  var max = {};

  // Find the largest node for each cluster.
  nodes.forEach(function(d) {
    if (!(d.color in max) || (d.radius >...