d3.js tree with radial progress charts as nodes.

Click on node to expand.
Chart API:
var tree = new Tree("data/radial-progress-tree.json")
  .setCutOffDepth(1)
  .setHeightHierarchy(200, 400, 700)
  .setOuterRadius(50)
  .setInnerRadius(38)
  .setFontSizeCoef(0.5)
  .setAnimationDuration(1000)
  .render("#radial-progress-tree");