Bubble Update Pattern II

Like Bubble Update Pattern I but with the circles drawn as SVG path elements instead of circle elements. Uses a custom function called circleToPath to draw paths that look like circles.

forked from HarryStevens's block: Bubble Update Pattern II

<html>
  <head>
    <style>
    body {
      margin: 0;
      font-family: "Helvetica", sans-serif;
    }
    text {
      text-anchor: middle;
      fill: #fff;
    }
    </style>
  </head>
  <body>
    <script src="https://d3js.org/d3.v4.min.js"></script>
    <script>
    var alphabet = "abcdefghijklmnopqrstuvwxyz".split("");

var width = window.innerWidth, height = window.innerHeight;

var svg = d3.select("body").append("svg").attr("width", width).attr("height", height);

var pack = d3.pack()
        .size([width, height])
        .padding(1.5);

redraw(randomizeData());
    d3.interval(function(){
      redraw(randomizeData());
    }, 1500);

function redraw(classes){

// transition
      var t = d3.transition()
          .duration(750);

// hierarchy
      var h = d3.hierarchy({children: classes})
          .sum(function(d) { return d.size; })

//JOIN
      var circle = svg.selectAll("path")
          .data(pack(h).leaves(), function(d){ return d.data.name; });

var text = svg.selectAll("text")
          .data(pack(h).leaves(), function(d){ return d.data.name; });

//EXIT
      circle.exit()
          .style("fill", "#b26745")
        .transition(t)
          .attr("d", function(d){ return circleToPath(d.x, d.y, 1e-6); })
          .remove();

text.exit()
        .transition(t)
          .attr("opacity", 1e-6)
          .remove();

//UPDATE
      circle
        .transition(t)
          .attr("d", function(d){ return circleToPath(d.x, d.y, d.r); })
          .style("fill", "#3a403d");

text
        .transition(t)
          .attr("x", function(d){ return d.x; })
          .attr("y", function(d){ return d.y; });

//ENTER
      circle.enter().append("path")
          .attr("d", function(d){ return circleToPath(d.x, d.y, 1e-6); })
          .style("fill", "#fff")
        .transition(t)
          .attr("d", function(d){ return circleToPath(d.x, d.y, d.r); })
          .style("fill", "#45b29d");

text.enter().append("text")
          .attr("opacity", 1e-6)
          .attr("x", function(d){ return d.x; })
          .attr("y", function(d){ return d.y; })
          .text(function(d){ return d.data.name; })
        .transition(t)
          .attr("opacity", 1);
    }

function random(min, max) {
      return Math.floor(Math.random() * (max - min + 1)) + min;
    }

function shuffle(array) {
      var m = array.length, t, i;

// While there remain elements to shuffle…
      while (m) {

// Pick a remaining element…
        i = Math.floor(Math.random() * m--);

// And swap it with the current element.
        t = array[m];
        array[m] = array[i];
        array[i] = t;
      }

return array;
    }

function circleToPath(cx, cy, r){
      return "M" + cx + "," + cy + "m" + (-r) + ",0a" + r + "," + r + " 0 1,0 " + (r * 2) + ",0a" + r + "," + r + " 0 1,0 " + (-r * 2) + ",0";
    }

</script>
  </body>
</html>

https://d3js.org/d3.v4.min.js