chart = {
const root = partition(data);
root.each(d => d.current = d);
const svg = d3.create("svg")
.attr("viewBox", [0, 0, width, width])
.style("font", "10px sans-serif");
const g = svg.append("g")
.attr("transform", `translate(${width / 2},${width / 2})`);
const path = g.append("g")
.selectAll("path")
.data(root.descendants().slice(1))
.join("path")
.attr("fill", d => { while (d.depth > 1) d = d.parent; return color(d.data.name); })
.attr("fill-opacity", d => arcVisible(d.current) ? (d.children ? 0.6 : 0.4) : 0)
.attr("pointer-events", d => arcVisible(d.current) ? "auto" : "none")
.attr("d", d => arc(d.current));
path.filter(d => d.children)
.style("cursor", "pointer")
.on("click", clicked);
path.append("title")
.attr("transform", "translate(-150, 0)")
.text(d => `${d.ancestors().map(d =>
{
if(d.data.name != 'System')
{
return " " + d.data.id_ + " " + d.data.name
}
else
{
return 'System'
}
}).reverse()} `)
;
d3.select("#main_title").remove()
const main_title = g.append("text").attr("id", "main_title")
.style("font", "16px sans-serif").attr("text-anchor", "middle")
.attr("dy", "3" )
.text("System");
const label = g.append("g")
.attr("pointer-events", "none")
.attr("text-anchor", "middle")
.style("user-select", "none")
.selectAll("text")
.data(root.descendants().slice(1))
.join("text")
.attr("dy", "0.35em")
.attr("fill-opacity", d => +labelVisible(d.current))
.attr("transform", d => labelTransform(d.current))
.text(d =>
{if(d.data.name.length > 16)
{
return d.data.name.substring(0,15) + "..."
}
else {
return d.data.name
}
}
)
.attr("word-wrap", "break-word");
const parent = g.append("circle")
.datum(root)
.attr("r", radius)
.attr("fill", "none")
.attr("pointer-events", "all")
.on("click", clicked);
function clicked(event, p) {
parent.datum(p.parent || root);
root.each(d => d.target = {
x0: Math.max(0, Math.min(1, (d.x0 - p.x0) / (p.x1 - p.x0))) * 2 * Math.PI,
x1: Math.max(0, Math.min(1, (d.x1 - p.x0) / (p.x1 - p.x0))) * 2 * Math.PI,
y0: Math.max(0, d.y0 - p.depth),
y1: Math.max(0, d.y1 - p.depth)
});
const t = g.transition().duration(750);
// Create title in the middle
d3.select("#main_title").remove()
const main_title = g.append("text").attr("id", "main_title")
.attr("dx", function(d) {
return -20
})
.style("font", "16px sans-serif").attr("text-anchor", "middle")
.attr("transform", function(d, i) {
p.x = 20,
p.y = 3;
return "translate(" + p.x + "," + p.y + ")";
})
.text(p.data.name.length > 23 ? p.data.name.substring(0,21) + "..." : p.data.name);
// Transition the data on all arcs, even the ones that aren’t visible,
// so that if this transition is interrupted, entering arcs will start
// the next transition from the desired position.
path.transition(t)
.tween("data", d => {
const i = d3.interpolate(d.current, d.target);
return t => d.current = i(t);
})
.filter(function(d) {
return +this.getAttribute("fill-opacity") || arcVisible(d.target);
})
.attr("fill-opacity", d => arcVisible(d.target) ? (d.children ? 0.6 : 0.4) : 0)
.attr("pointer-events", d => arcVisible(d.target) ? "auto" : "none")
.attrTween("d", d => () => arc(d.current));
label.filter(function(d) {
return +this.getAttribute("fill-opacity") || labelVisible(d.target);
}).transition(t)
.attr("fill-opacity", d => +labelVisible(d.target))
.attrTween("transform", d => () => labelTransform(d.current));
}
// Adjust depth of how many rings of the circle are shown here
function arcVisible(d) {
return d.y1 <= 4 && d.y0 >= 1 && d.x1 > d.x0;
}
function labelVisible(d) {
return d.y1 <= 4 && d.y0 >= 1 && (d.y1 - d.y0) * (d.x1 - d.x0) > 0.03;
}
function labelTransform(d) {
const x = (d.x0 + d.x1) / 2 * 180 / Math.PI;
const y = (d.y0 + d.y1) / 2 * radius;
return `rotate(${x - 90}) translate(${y},0) rotate(${x < 180 ? 0 : 180})`;
}
return svg.node();
}
data = FileAttachment("system@3.json").json()
partition = data => {
const root = d3.hierarchy(data)
.sum(d =>
{
if (!d.children || d.children.length === 0)
{
return d.value
}
else
{
return 0
}
}
)
.sort((a, b) => b.name - a.name);
return d3.partition()
.size([2 * Math.PI, root.height + 1])
(root);
}
color = d3.scaleOrdinal(d3.quantize(d3.interpolateRainbow, data.children.length + 1))
format = d3.format(",d")
width = 932
radius = width / 10.5
arc = d3.arc()
.startAngle(d => d.x0)
.endAngle(d => d.x1)
.padAngle(d => Math.min((d.x1 - d.x0) / 2, 0.003))
.padRadius(radius * 1.5)
.innerRadius(d => d.y0 * radius)
.outerRadius(d => Math.max(d.y0 * radius, d.y1 * radius - 1))
Purpose-built for displays of data
Observable is your go-to platform for exploring data and creating expressive data visualizations. Use reactive JavaScript notebooks for prototyping and a collaborative canvas for visual data exploration and dashboard creation.
