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<!DOCTYPE html> |
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<meta charset="utf-8"> |
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<style> |
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body { |
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font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; |
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margin: auto; |
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position: relative; |
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width: 960px; |
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} |
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form { |
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position: absolute; |
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right: 10px; |
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top: 10px; |
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} |
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path { |
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stroke: #fff; |
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fill-rule: evenodd; |
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} |
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</style> |
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<body> |
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<form> |
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<label><input type="radio" name="mode" value="size"> Size</label> |
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<label><input type="radio" name="mode" value="count" checked> Count</label> |
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</form> |
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<script src="//d3js.org/d3.v3.min.js"></script> |
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<script> |
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var width = 960, |
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height = 700, |
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radius = Math.min(width, height) / 2; |
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var x = d3.scale.linear() |
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.range([0, 2 * Math.PI]); |
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var y = d3.scale.sqrt() |
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.range([0, radius]); |
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var color = d3.scale.category20c(); |
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var svg = d3.select("body").append("svg") |
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.attr("width", width) |
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.attr("height", height) |
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.append("g") |
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.attr("transform", "translate(" + width / 2 + "," + (height / 2 + 10) + ")"); |
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var partition = d3.layout.partition() |
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.sort(null) |
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.value(function(d) { return 1; }); |
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var arc = d3.svg.arc() |
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.startAngle(function(d) { return Math.max(0, Math.min(2 * Math.PI, x(d.x))); }) |
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.endAngle(function(d) { return Math.max(0, Math.min(2 * Math.PI, x(d.x + d.dx))); }) |
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.innerRadius(function(d) { return Math.max(0, y(d.y)); }) |
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.outerRadius(function(d) { return Math.max(0, y(d.y + d.dy)); }); |
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// Keep track of the node that is currently being displayed as the root. |
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var node; |
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d3.json("https://gist.githubusercontent.com/mbostock/4348373/raw/85f18ac90409caa5529b32156aa6e71cf985263f/flare.json", function(error, root) { |
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node = root; |
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var path = svg.datum(root).selectAll("path") |
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.data(partition.nodes) |
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.enter().append("path") |
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.attr("d", arc) |
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.style("fill", function(d) { return color((d.children ? d : d.parent).name); }) |
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.on("click", click) |
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.each(stash); |
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d3.selectAll("input").on("change", function change() { |
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var value = this.value === "count" |
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? function() { return 1; } |
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: function(d) { return d.size; }; |
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path |
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.data(partition.value(value).nodes) |
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.transition() |
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.duration(1000) |
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.attrTween("d", arcTweenData); |
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}); |
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function click(d) { |
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node = d; |
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path.transition() |
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.duration(1000) |
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.attrTween("d", arcTweenZoom(d)); |
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} |
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}); |
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d3.select(self.frameElement).style("height", height + "px"); |
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// Setup for switching data: stash the old values for transition. |
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function stash(d) { |
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d.x0 = d.x; |
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d.dx0 = d.dx; |
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} |
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// When switching data: interpolate the arcs in data space. |
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function arcTweenData(a, i) { |
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var oi = d3.interpolate({x: a.x0, dx: a.dx0}, a); |
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function tween(t) { |
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var b = oi(t); |
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a.x0 = b.x; |
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a.dx0 = b.dx; |
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return arc(b); |
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} |
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if (i == 0) { |
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// If we are on the first arc, adjust the x domain to match the root node |
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// at the current zoom level. (We only need to do this once.) |
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var xd = d3.interpolate(x.domain(), [node.x, node.x + node.dx]); |
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return function(t) { |
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x.domain(xd(t)); |
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return tween(t); |
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}; |
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} else { |
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return tween; |
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} |
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} |
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// When zooming: interpolate the scales. |
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function arcTweenZoom(d) { |
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var xd = d3.interpolate(x.domain(), [d.x, d.x + d.dx]), |
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yd = d3.interpolate(y.domain(), [d.y, 1]), |
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yr = d3.interpolate(y.range(), [d.y ? 20 : 0, radius]); |
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return function(d, i) { |
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return i |
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? function(t) { return arc(d); } |
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: function(t) { x.domain(xd(t)); y.domain(yd(t)).range(yr(t)); return arc(d); }; |
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}; |
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} |
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</script> |
