var w = 700, | |
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; | |
var div = d3.select("#chart"); | |
var vis = div.append("svg") | |
.attr("width", w + p * 2) | |
.attr("height", h + p * 2) | |
.append("g") | |
.attr("transform", "translate(" + (r + p) + "," + (r + p) + ")"); | |
var partition = d3.layout.partition() | |
.sort(null) | |
.value(function(d) { return 5.8 - d.depth; }); | |
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, d.y ? y(d.y) : d.y); }) | |
.outerRadius(function(d) { return Math.max(0, y(d.y + d.dy)); }); | |
d3.json("./moxie-dependencies.json", function(json) { | |
var nodes = partition.nodes(json); | |
var path = vis.selectAll("path").data(nodes); | |
path.enter().append("path") | |
.attr("id", function(d, i) { return "path-" + i; }) | |
.attr("d", arc) | |
.attr("fill-rule", "evenodd") | |
.style("fill", colour) | |
.on("click", click); | |
var text = vis.selectAll("text").data(nodes); | |
var textEnter = text.enter().append("text") | |
.style("fill-opacity", 1) | |
.style("fill", function(d) { | |
return brightness(d3.rgb(colour(d))) < 125 ? "#eee" : "#000"; | |
}) | |
.attr("text-anchor", function(d) { | |
return x(d.x + d.dx / 2) > Math.PI ? "end" : "start"; | |
}) | |
.attr("dy", ".2em") | |
.attr("transform", function(d) { | |
var multiline = (d.name || "").split(" ").length > 1, | |
angle = x(d.x + d.dx / 2) * 180 / Math.PI - 90, | |
rotate = angle + (multiline ? -.5 : 0); | |
return "rotate(" + rotate + ")translate(" + (y(d.y) + p) + ")rotate(" + (angle > 90 ? -180 : 0) + ")"; | |
}) | |
.on("click", click); | |
textEnter.append("tspan") | |
.attr("x", 0) | |
.text(function(d) { return d.depth ? d.name.split(" ")[0] : ""; }); | |
textEnter.append("tspan") | |
.attr("x", 0) | |
.attr("dy", "1em") | |
.text(function(d) { return d.depth ? d.name.split(" ")[1] || "" : ""; }); | |
function click(d) { | |
path.transition() | |
.duration(duration) | |
.attrTween("d", arcTween(d)); | |
// Somewhat of a hack as we rely on arcTween updating the scales. | |
text | |
.style("visibility", function(e) { | |
return isParentOf(d, e) ? null : d3.select(this).style("visibility"); | |
}) | |
.transition().duration(duration) | |
.attrTween("text-anchor", function(d) { | |
return function() { | |
return x(d.x + d.dx / 2) > Math.PI ? "end" : "start"; | |
}; | |
}) | |
.attrTween("transform", function(d) { | |
var multiline = (d.name || "").split(" ").length > 1; | |
return function() { | |
var angle = x(d.x + d.dx / 2) * 180 / Math.PI - 90, | |
rotate = angle + (multiline ? -.5 : 0); | |
return "rotate(" + rotate + ")translate(" + (y(d.y) + p) + ")rotate(" + (angle > 90 ? -180 : 0) + ")"; | |
}; | |
}) | |
.style("fill-opacity", function(e) { return isParentOf(d, e) ? 1 : 1e-6; }) | |
.each("end", function(e) { | |
d3.select(this).style("visibility", isParentOf(d, e) ? null : "hidden"); | |
}); | |
} | |
}); | |
function isParentOf(p, c) { | |
if (p === c) return true; | |
if (p.children) { | |
return p.children.some(function(d) { | |
return isParentOf(d, c); | |
}); | |
} | |
return false; | |
} | |
function colour(d) { | |
if (d.children) { | |
// There is a maximum of two children! | |
var colours = d.children.map(colour), | |
a = d3.hsl(colours[0]), | |
b = d3.hsl(colours[1]); | |
// L*a*b* might be better here... | |
return d3.hsl((a.h + b.h) / 2, a.s * 1.2, a.l / 1.2); | |
} | |
return d.colour || "#fff"; | |
} | |
// Interpolate the scales! | |
function arcTween(d) { | |
var my = maxY(d), | |
xd = d3.interpolate(x.domain(), [d.x, d.x + d.dx]), | |
yd = d3.interpolate(y.domain(), [d.y, my]), | |
yr = d3.interpolate(y.range(), [d.y ? 20 : 0, r]); | |
return function(d) { | |
return function(t) { x.domain(xd(t)); y.domain(yd(t)).range(yr(t)); return arc(d); }; | |
}; | |
} | |
function maxY(d) { | |
return d.children ? Math.max.apply(Math, d.children.map(maxY)) : d.y + d.dy; | |
} | |
// http://www.w3.org/WAI/ER/WD-AERT/#color-contrast | |
function brightness(rgb) { | |
return rgb.r * .299 + rgb.g * .587 + rgb.b * .114; | |
} |