xiaohan2012 · February 28, 2014 15:55
diff --git a/index.html b/index.html
 <!DOCTYPE html>
 <meta charset="utf-8">
 <style>

 circle,
 path {
  cursor: pointer;
 }

 circle {
  fill: none;
  pointer-events: all;
 }

 </style>
 <body>
 <script src="http://d3js.org/d3.v3.min.js"></script>
 <script>

 var margin = {top: 350, right: 480, bottom: 350, left: 480},
    radius = Math.min(margin.top, margin.right, margin.bottom, margin.left) - 10;

 var hue = d3.scale.category10();

 var luminance = d3.scale.sqrt()
    .domain([0, 1e6])
    .clamp(true)
    .range([90, 20]);

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

 var partition = d3.layout.partition()
    .sort(function(a, b) { return d3.ascending(a.name, b.name); })
    .size([2 * Math.PI, radius]);

 var arc = d3.svg.arc()
    .startAngle(function(d) { return d.x; })
    .endAngle(function(d) { return d.x + d.dx - .01 / (d.depth + .5); })
    .innerRadius(function(d) { return radius / 3 * d.depth; })
    .outerRadius(function(d) { return radius / 3 * (d.depth + 1) - 1; });

 d3.json("/mbostock/raw/4063550/flare.json", function(error, root) {

  // Compute the initial layout on the entire tree to sum sizes.
  // Also compute the full name and fill color for each node,
  // and stash the children so they can be restored as we descend.
  partition
      .value(function(d) { return d.size; })
      .nodes(root)
      .forEach(function(d) {
        d._children = d.children;
        d.sum = d.value;
        d.key = key(d);
        d.fill = fill(d);
      });

  // Now redefine the value function to use the previously-computed sum.
  partition
      .children(function(d, depth) { return depth < 2 ? d._children : null; })
      .value(function(d) { return d.sum; });

  var center = svg.append("circle")
      .attr("r", radius / 3)
      .on("click", zoomOut);

  center.append("title")
      .text("zoom out");

  var path = svg.selectAll("path")
      .data(partition.nodes(root).slice(1))
    .enter().append("path")
      .attr("d", arc)
      .style("fill", function(d) { return d.fill; })
      .each(function(d) { this._current = updateArc(d); })
      .on("click", zoomIn);

  function zoomIn(p) {
    if (p.depth > 1) p = p.parent;
    if (!p.children) return;
    zoom(p, p);
  }

  function zoomOut(p) {
    if (!p.parent) return;
    zoom(p.parent, p);
  }

  // Zoom to the specified new root.
  function zoom(root, p) {
    if (document.documentElement.__transition__) return;

    // Rescale outside angles to match the new layout.
    var enterArc,
        exitArc,
        outsideAngle = d3.scale.linear().domain([0, 2 * Math.PI]);

    function insideArc(d) {
      return p.key > d.key
          ? {depth: d.depth - 1, x: 0, dx: 0} : p.key < d.key
          ? {depth: d.depth - 1, x: 2 * Math.PI, dx: 0}
          : {depth: 0, x: 0, dx: 2 * Math.PI};
    }

    function outsideArc(d) {
      return {depth: d.depth + 1, x: outsideAngle(d.x), dx: outsideAngle(d.x + d.dx) - outsideAngle(d.x)};
    }

    center.datum(root);

    // When zooming in, arcs enter from the outside and exit to the inside.
    // Entering outside arcs start from the old layout.
    if (root === p) enterArc = outsideArc, exitArc = insideArc, outsideAngle.range([p.x, p.x + p.dx]);

    path = path.data(partition.nodes(root).slice(1), function(d) { return d.key; });

    // When zooming out, arcs enter from the inside and exit to the outside.
    // Exiting outside arcs transition to the new layout.
    if (root !== p) enterArc = insideArc, exitArc = outsideArc, outsideAngle.range([p.x, p.x + p.dx]);

    d3.transition().duration(d3.event.altKey ? 7500 : 750).each(function() {
      path.exit().transition()
          .style("fill-opacity", function(d) { return d.depth === 1 + (root === p) ? 1 : 0; })
          .attrTween("d", function(d) { return arcTween.call(this, exitArc(d)); })
          .remove();

      path.enter().append("path")
          .style("fill-opacity", function(d) { return d.depth === 2 - (root === p) ? 1 : 0; })
          .style("fill", function(d) { return d.fill; })
          .on("click", zoomIn)
          .each(function(d) { this._current = enterArc(d); });

      path.transition()
          .style("fill-opacity", 1)
          .attrTween("d", function(d) { return arcTween.call(this, updateArc(d)); });
    });
  }
 });

 function key(d) {
  var k = [], p = d;
  while (p.depth) k.push(p.name), p = p.parent;
  return k.reverse().join(".");
 }

 function fill(d) {
  var p = d;
  while (p.depth > 1) p = p.parent;
  var c = d3.lab(hue(p.name));
  c.l = luminance(d.sum);
  return c;
 }

 function arcTween(b) {
  var i = d3.interpolate(this._current, b);
  this._current = i(0);
  return function(t) {
    return arc(i(t));
  };
 }

 function updateArc(d) {
  return {depth: d.depth, x: d.x, dx: d.dx};
 }

 d3.select(self.frameElement).style("height", margin.top + margin.bottom + "px");

 </script>
	<!DOCTYPE html>
	<meta charset="utf-8">
	<style>

	circle,
	path {
	cursor: pointer;
	}

	circle {
	fill: none;
	pointer-events: all;
	}

	</style>
	<body>
	<script src="http://d3js.org/d3.v3.min.js"></script>
	<script>

	var margin = {top: 350, right: 480, bottom: 350, left: 480},
	radius = Math.min(margin.top, margin.right, margin.bottom, margin.left) - 10;

	var hue = d3.scale.category10();

	var luminance = d3.scale.sqrt()
	.domain([0, 1e6])
	.clamp(true)
	.range([90, 20]);

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

	var partition = d3.layout.partition()
	.sort(function(a, b) { return d3.ascending(a.name, b.name); })
	.size([2 * Math.PI, radius]);

	var arc = d3.svg.arc()
	.startAngle(function(d) { return d.x; })
	.endAngle(function(d) { return d.x + d.dx - .01 / (d.depth + .5); })
	.innerRadius(function(d) { return radius / 3 * d.depth; })
	.outerRadius(function(d) { return radius / 3 * (d.depth + 1) - 1; });

	d3.json("/mbostock/raw/4063550/flare.json", function(error, root) {

	// Compute the initial layout on the entire tree to sum sizes.
	// Also compute the full name and fill color for each node,
	// and stash the children so they can be restored as we descend.
	partition
	.value(function(d) { return d.size; })
	.nodes(root)
	.forEach(function(d) {
	d._children = d.children;
	d.sum = d.value;
	d.key = key(d);
	d.fill = fill(d);
	});

	// Now redefine the value function to use the previously-computed sum.
	partition
	.children(function(d, depth) { return depth < 2 ? d._children : null; })
	.value(function(d) { return d.sum; });

	var center = svg.append("circle")
	.attr("r", radius / 3)
	.on("click", zoomOut);

	center.append("title")
	.text("zoom out");

	var path = svg.selectAll("path")
	.data(partition.nodes(root).slice(1))
	.enter().append("path")
	.attr("d", arc)
	.style("fill", function(d) { return d.fill; })
	.each(function(d) { this._current = updateArc(d); })
	.on("click", zoomIn);

	function zoomIn(p) {
	if (p.depth > 1) p = p.parent;
	if (!p.children) return;
	zoom(p, p);
	}

	function zoomOut(p) {
	if (!p.parent) return;
	zoom(p.parent, p);
	}

	// Zoom to the specified new root.
	function zoom(root, p) {
	if (document.documentElement.__transition__) return;

	// Rescale outside angles to match the new layout.
	var enterArc,
	exitArc,
	outsideAngle = d3.scale.linear().domain([0, 2 * Math.PI]);

	function insideArc(d) {
	return p.key > d.key
	? {depth: d.depth - 1, x: 0, dx: 0} : p.key < d.key
	? {depth: d.depth - 1, x: 2 * Math.PI, dx: 0}
	: {depth: 0, x: 0, dx: 2 * Math.PI};
	}

	function outsideArc(d) {
	return {depth: d.depth + 1, x: outsideAngle(d.x), dx: outsideAngle(d.x + d.dx) - outsideAngle(d.x)};
	}

	center.datum(root);

	// When zooming in, arcs enter from the outside and exit to the inside.
	// Entering outside arcs start from the old layout.
	if (root === p) enterArc = outsideArc, exitArc = insideArc, outsideAngle.range([p.x, p.x + p.dx]);

	path = path.data(partition.nodes(root).slice(1), function(d) { return d.key; });

	// When zooming out, arcs enter from the inside and exit to the outside.
	// Exiting outside arcs transition to the new layout.
	if (root !== p) enterArc = insideArc, exitArc = outsideArc, outsideAngle.range([p.x, p.x + p.dx]);

	d3.transition().duration(d3.event.altKey ? 7500 : 750).each(function() {
	path.exit().transition()
	.style("fill-opacity", function(d) { return d.depth === 1 + (root === p) ? 1 : 0; })
	.attrTween("d", function(d) { return arcTween.call(this, exitArc(d)); })
	.remove();

	path.enter().append("path")
	.style("fill-opacity", function(d) { return d.depth === 2 - (root === p) ? 1 : 0; })
	.style("fill", function(d) { return d.fill; })
	.on("click", zoomIn)
	.each(function(d) { this._current = enterArc(d); });

	path.transition()
	.style("fill-opacity", 1)
	.attrTween("d", function(d) { return arcTween.call(this, updateArc(d)); });
	});
	}
	});

	function key(d) {
	var k = [], p = d;
	while (p.depth) k.push(p.name), p = p.parent;
	return k.reverse().join(".");
	}

	function fill(d) {
	var p = d;
	while (p.depth > 1) p = p.parent;
	var c = d3.lab(hue(p.name));
	c.l = luminance(d.sum);
	return c;
	}

	function arcTween(b) {
	var i = d3.interpolate(this._current, b);
	this._current = i(0);
	return function(t) {
	return arc(i(t));
	};
	}

	function updateArc(d) {
	return {depth: d.depth, x: d.x, dx: d.dx};
	}

	d3.select(self.frameElement).style("height", margin.top + margin.bottom + "px");

	</script>