chart = {
const root = partition(data);
let focus = root;
const svg = d3.create("svg")
.attr("viewBox", [0, 0, width, height])
.style("font", "10px sans-serif");
const cell = svg
.selectAll("g")
.data(root.descendants())
.join("g")
.attr("transform", d => `translate(${d.y0},${d.x0})`);
const rect = cell.append("rect")
.attr("width", d => d.y1 - d.y0 - 1)
.attr("height", d => rectHeight(d))
.attr("fill-opacity", 0.6)
.attr("fill", d => {
if (!d.depth) return "#ccc";
while (d.depth > 1) d = d.parent;
return color(d.data.name);
})
.style("cursor", "pointer")
.on("click", clicked);
const text = cell.append("text")
.style("user-select", "none")
.attr("pointer-events", "none")
.attr("x", 4)
.attr("y", 13)
.attr("fill-opacity", d => +labelVisible(d));
text.append("tspan")
.text(d => d.data.name);
const tspan = text.append("tspan")
.attr("fill-opacity", d => labelVisible(d) * 0.7)
.text(d => ` ${format(d.value)}`);
cell.append("title")
.text(d => `${d.ancestors().map(d => d.data.name).reverse().join("/")}\n${format(d.value)}`);
function clicked(p) {
focus = focus === p ? p = p.parent : p;
root.each(d => d.target = {
x0: (d.x0 - p.x0) / (p.x1 - p.x0) * height,
x1: (d.x1 - p.x0) / (p.x1 - p.x0) * height,
y0: d.y0 - p.y0,
y1: d.y1 - p.y0
});
const t = cell.transition().duration(750)
.attr("transform", d => `translate(${d.target.y0},${d.target.x0})`);
rect.transition(t).attr("height", d => rectHeight(d.target));
text.transition(t).attr("fill-opacity", d => +labelVisible(d.target));
tspan.transition(t).attr("fill-opacity", d => labelVisible(d.target) * 0.7);
}
function rectHeight(d) {
return d.x1 - d.x0 - Math.min(1, (d.x1 - d.x0) / 2);
}
function labelVisible(d) {
return d.y1 <= width && d.y0 >= 0 && d.x1 - d.x0 > 16;
}
highlightPath(cell, "rect" , root, "MergeEdge", "flare");
return svg.node();
}
function highlightPath(selector, element, root, targetNode, sourceNode) {
console.log(root);
//get the list of all descendants for the root node
let descendantsList = root.descendants();
console.log({descendantsList});
//find the target child node and source node in the descendantsList
let targetChildNode = descendantsList.filter(f => f.data.name == targetNode);
console.log({targetChildNode});
let sourceRootNode = descendantsList.filter(f => f.data.name == sourceNode);
console.log({sourceRootNode})
//get the path to target from the source
let pathToTarget = sourceRootNode[0].path(targetChildNode[0]);
console.log({pathToTarget}); //you can return this if you just want the list of nodes for the path or apply a highlight below
//highlight the nodes by filtering those which are present in the pathToTarget list.
let pathNodes = selector.selectAll(element)
.filter(f => pathToTarget.findIndex(p => p.data.name === f.data.name) > -1)
.style("stroke","red");
}
data = FileAttachment("flare-2.json").json()
partition = data => {
const root = d3.hierarchy(data)
.sum(d => d.value)
.sort((a, b) => b.height - a.height || b.value - a.value);
return d3.partition()
.size([height, (root.height + 1) * width / 3])
(root);
}
color = d3.scaleOrdinal(d3.quantize(d3.interpolateRainbow, data.children.length + 1))
format = d3.format(",d")
width = 975
height = 1200
d3 = require("d3@5")
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