Using D3 to create a Bullseye or Layered Harvey Ball charts

This is an attempt at creating an example of generating Bullseye or Layered Harvey Ball charts using D3.

For each element in the applications array a new chart is created tracking the status of the configurations, ui, and backend processes completion. Of course this is just some random sample data :)

Children is used to track the status items for each application. Each item in this array should contain a name (string) and a progress (float 0..1) status indicator. The progress value is considered to be in a range of 0 to 1 with 1 being 100% complete and 0 being not even started.

<!DOCTYPE html>
<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html;charset=utf-8">
    <title>Bullseye or Layered Harvey Ball charts</title>
    <script src="https://cdn.jsdelivr.net/npm/d3@2.10.3/d3.v2.js"></script>
    <style type="text/css">
      #app_status_report .vis{
        display: inline-block; float: left;
        margin-right: 10px;
        border: 1px solid black;
        padding: 5px;
      }
      #app_status_report .vis h3{
        margin: 0;
        padding: 0;
        border-bottom: 1px solid silver;
      }
      #app_status_report .vis svg{
      }
      .key.label{
        margin: 0;
        display: block;
        color: white;
      }
    </style>
  </head>
  <body>
    <div id="app_status_report"></div>
    <script type="text/javascript">
      var primaryDiv = d3.select("#app_status_report");
      var w = 125,
          h = w,
          r = w / 2,
          x = d3.scale.linear().range([0, 2 * Math.PI]),
          y = d3.scale.pow().exponent(1.3).domain([0, 1]).range([0, r]),
          p = 5,
          duration = 1000,
          //taken from colorbrewer.Blues[9]
          colors = ["rgb(8,48,107)", "rgb(33,113,181)", "rgb(107,174,214)"],
          numColors = colors.length,
          color = function(idx){
            return colors[idx%numColors];
          };

d3.json("data.json", function(appsData) {
        var l = appsData.length;

for(var idx=0; idx<l; idx++){
          var div = primaryDiv.append('div')
              .attr("width", w)
              .attr('class', 'vis')
              ;
          var appSpace = appsData[idx];
          div.append('h3').text(appSpace.name);
          var vis = div.append("svg")
              .attr("width", w)
              .attr("height", h)
              .append("g")
              .attr("transform", "translate(" + (r + p) + "," + (r + p) + ")");
          for(var k=0; k<appSpace.children.length; k++){
            div.append('label')
              .attr('class', 'key label')
              .text(appSpace.children[k].progress?appSpace.children[k].name+' ('+(appSpace.children[k].progress*100)+'%)':appSpace.children[k].name+' (0%)')
              .style("background", color(k))//+2))
              ;
          }
          
          var partition = d3.layout.partition()
              .sort(null)
              .value(function(d) { return 5.8 - d.depth; });
          var nodes = partition.nodes({children: [appSpace]});

var slices = nodes.length,
              sliceSize = r/slices;
              sliceSizes = [];

for(var i=0; i<slices; i++){
            sliceSizes.push({innerRadius: (i-1)*sliceSize, outerRadius: (i)*sliceSize+1});
          }

// https://www.w3.org/WAI/ER/WD-AERT/#color-contrast
      function brightness(rgb) {
        return rgb.r * .299 + rgb.g * .587 + rgb.b * .114;
      }
    </script>
  </body>
</html>

Modified http://mbostock.github.com/d3/d3.v2.js to a secure url

https://mbostock.github.com/d3/d3.v2.js