Created
January 7, 2017 23:01
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sunburst example
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<script src="https://d3js.org/d3.v3.min.js"></script> | |
<script> | |
var width = 960, | |
height = 900, | |
radius = Math.min(width, height) / 3; | |
var x = d3.scale.linear() | |
.range([0, 2 * Math.PI]); | |
var y = d3.scale.linear() | |
.range([0, radius]); | |
var color = d3.scale.category20c(); | |
var svg1 = d3.select("body").append("svg") | |
.attr("width", width) | |
.attr("height", height) | |
.append("g") | |
.attr("transform", "translate(" + width / 2 + "," + (height / 2 + 10) + ")"); | |
var partition = d3.layout.partition() | |
.value(function(d) { return d.size; }); | |
var arc = d3.svg.arc() | |
.startAngle(function(d) { return Math.max(0, Math.min(2 * Math.PI, x(d.x))); }) | |
.endAngle(function(d) { return Math.max(0, Math.min(2 * Math.PI, x(d.x + d.dx))); }) | |
.innerRadius(function(d) { return Math.max(0, y(d.y)); }) | |
.outerRadius(function(d) { return Math.max(0, y(d.y + d.dy)); }); | |
d3.json("https://raw.githubusercontent.com/fluidmotion/visTools/master/examples/sunburst/blackhills.json", function(error, root) { | |
var g = svg1.selectAll("g") | |
.data(partition.nodes(root)) | |
.enter().append("g"); | |
var path = g.append("path") | |
.attr("d", arc) | |
.style("fill", function(d) { return color((d.children ? d : d.parent).name); }) | |
.on("click", click); | |
var text = g.append("text") | |
.attr("transform", function(d) { return "rotate(" + computeTextRotation(d) + ")"; }) | |
.attr("x", function(d) { return y(d.y); }) | |
.attr("dx", "10") // margin | |
.attr("dy", ".35em") // vertical-align | |
// http://stackoverflow.com/questions/24547620/zoomable-sunburst-with-labels-issue | |
.attr("visibility", function(d) { return d.dx < 0.01? "hidden" : "visible" }) | |
.text(function(d) { return d.name; }); | |
function click(d) { | |
var total = d.dx; | |
// fade out all text elements | |
text.transition().attr("opacity", 0); | |
path.transition() | |
.duration(750) | |
.attrTween("d", arcTween(d)) | |
.each("end", function(e, i) { | |
// check if the animated element's data e lies within the visible angle span given in d | |
if (e.x >= d.x && e.x < (d.x + d.dx)) { | |
// get a selection of the associated text element | |
var arcText = d3.select(this.parentNode).select("text"); | |
// fade in the text element and recalculate positions | |
arcText.transition().duration(750) | |
.attr("opacity", 1) | |
.attr("transform", function() { return "rotate(" + computeTextRotation(e) + ")" }) | |
.attr("x", function(d) { return y(d.y); }) | |
.attr("visibility", function(d) { return d.dx/total < 0.01 ? "hidden" : "visible"}); | |
} | |
}); | |
} | |
}); | |
d3.select(self.frameElement).style("height", height + "px"); | |
// Interpolate the scales! | |
function arcTween(d) { | |
var xd = d3.interpolate(x.domain(), [d.x, d.x + d.dx]), | |
yd = d3.interpolate(y.domain(), [d.y, 1]), | |
yr = d3.interpolate(y.range(), [d.y ? 20 : 0, radius]); | |
return function(d, i) { | |
return i | |
? function(t) { return arc(d); } | |
: function(t) { x.domain(xd(t)); y.domain(yd(t)).range(yr(t)); return arc(d); }; | |
}; | |
} | |
function computeTextRotation(d) { | |
return (x(d.x + d.dx / 2) - Math.PI / 2) / Math.PI * 180; | |
} | |
</script> |
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