Published
Edited
Jan 31, 2019
11 forks
15 stars
chart = {
// Display Options
let width = 930;
let height = width;
let bold = true;
let black = false;
let shadow = true;
let multicolor = true;
let hexcolor = "#0099cc";
const format = d3.format(",d")
const pack = data => d3.pack()
.size([width, height])
.padding(3)
(d3.hierarchy(data)
.sum(d => d.size)
.sort((a, b) => b.value - a.value))
const root = pack(data);
let focus = root;
let view;
let fontsize = d3.scaleOrdinal()
.domain([1,3])
.range([24,16])
function setColorScheme(multi){
if (multi) {
let color = d3.scaleOrdinal()
.range(d3.schemeCategory10)
return color;
}
}
let color = setColorScheme(multicolor);
function setCircleColor(obj) {
let depth = obj.depth;
while (obj.depth > 1) {
obj = obj.parent;
}
let newcolor = multicolor ? d3.hsl(color(obj.data.name)) : d3.hsl(hexcolor);
newcolor.l += depth == 1 ? 0 : depth * .1;
return newcolor;
}
function setStrokeColor(obj) {
let depth = obj.depth;
while (obj.depth > 1) {
obj = obj.parent;
}
let strokecolor = multicolor ? d3.hsl(color(obj.data.name)) : d3.hsl(hexcolor);
return strokecolor;
}
const svg = d3.select(DOM.svg(width, height))
.attr("viewBox", `-${width / 2} -${height / 2} ${width} ${height}`)
.style("display", "block")
.style("margin", "0 -14px")
.style("width", "calc(100% + 28px)")
.style("height", "auto")
.style("background", "white")
.style("cursor", "pointer")
.on("click", () => zoom(root));
const node = svg.append("g")
.selectAll("circle")
.data(root.descendants().slice(1))
.enter().append("circle")
.attr("fill", setCircleColor)
.attr("stroke", setStrokeColor)
.attr("pointer-events", d => !d.children ? "none" : null)
.on("mouseover", function() { d3.select(this).attr("stroke", d => d.depth == 1 ? "black" : "white"); })
.on("mouseout", function() { d3.select(this).attr("stroke", setStrokeColor); })
.on("click", d => focus !== d && (zoom(d), d3.event.stopPropagation()));
const label = svg.append("g")
.style("fill", function() {
return black ? "black" : "white";
})
.style("text-shadow", function(){
if (shadow) {
return black ? "2px 2px 0px white" : "2px 2px 0px black";
} else {
return "none";
}
})
.attr("pointer-events", "none")
.attr("text-anchor", "middle")
.selectAll("text")
.data(root.descendants())
.enter().append("text")
.style("fill-opacity", d => d.parent === root ? 1 : 0)
.style("display", d => d.parent === root ? "inline" : "none")
.style("font", d => fontsize(d.depth) + "px sans-serif")
.style("font-weight", function() {
return bold ? "bold" : "normal";
})
.text(d => d.data.name);
zoomTo([root.x, root.y, root.r * 2]);
function zoomTo(v) {
const k = width / v[2];
view = v;
label.attr("transform", d => `translate(${(d.x - v[0]) * k},${(d.y - v[1]) * k + fontsize(d.depth)/4})`);
node.attr("transform", d => `translate(${(d.x - v[0]) * k},${(d.y - v[1]) * k})`);
node.attr("r", d => d.r * k);
}
function zoom(d) {
const focus0 = focus;
focus = d;
const transition = svg.transition()
.duration(d3.event.altKey ? 7500 : 750)
.tween("zoom", d => {
const i = d3.interpolateZoom(view, [focus.x, focus.y, focus.r * 2]);
return t => zoomTo(i(t));
});
label
.filter(function(d) { return d.parent === focus || this.style.display === "inline"; })
.transition(transition)
.style("fill-opacity", d => d.parent === focus ? 1 : 0)
.on("start", function(d) { if (d.parent === focus) this.style.display = "inline"; })
.on("end", function(d) { if (d.parent !== focus) this.style.display = "none"; });
}
return svg.node();
}
data = require("@observablehq/flare")
d3 = require("d3@5")
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