chart = {
const nodes = layoutedData.nodes;
const links = layoutedData.links;
const svg = d3.create("svg")
.attr("viewBox", [0, 0, width, height]);
const link = svg.append("g")
.attr("stroke", "#999")
.attr("stroke-opacity", 0.6)
.selectAll("line")
.data(links)
.join("line")
.attr("stroke-width", d => Math.sqrt(d.value));
const node = svg.append("g")
.attr("stroke", "#fff")
.attr("stroke-width", 1.5)
.selectAll("circle")
.data(nodes)
.join("circle")
.attr("r", 5)
.attr("fill", color)
.attr("cursor", "pointer");
node.append("title")
.text(d => d.id);
let hoveredNode = undefined;
let clickedNode = undefined;
const update = () => {
link
.attr("x1", d => d.source.x)
.attr("y1", d => d.source.y)
.attr("x2", d => d.target.x)
.attr("y2", d => d.target.y)
.attr("stroke-dasharray", d => {
const activeNode = clickedNode || hoveredNode;
if (activeNode && (d.__proto__.source === activeNode.id || d.__proto__.target === activeNode.id)) {
return "";
}
const lineLengthCoveredByNode = 5;
const lineLength = Math.sqrt((d.source.x - d.target.x) ** 2 + (d.source.y - d.target.y) ** 2) - lineLengthCoveredByNode * 2;
const lineStubLength = config.stubDrawingType === 'relative' ? lineLength * config.relativeStubLength : config.absoluteStubLength;
if (lineLength < lineStubLength * 2) {
return "";
}
return `${lineLengthCoveredByNode + lineStubLength} ${lineLength - lineStubLength * 2}`;
});
node
.attr("cx", d => d.x)
.attr("cy", d => d.y);
};
node
.on("mouseover", d => {
hoveredNode = d;
update();
})
.on("mouseout", d => {
if (hoveredNode === d) {
hoveredNode = undefined;
update();
}
})
.on("mousedown", d => {
clickedNode = d;
update();
})
.on("mouseup", d => {
clickedNode = undefined;
update();
});
document.addEventListener("mousemove", event => {
if (event.buttons === 0) {
clickedNode = undefined;
update();
}
});
node.call(d3.drag().on("drag", d => {
d.x = d3.event.x;
d.y = d3.event.y;
update();
}));
update();
return svg.node();
}
One platform to build and deploy the best data apps
Experiment and prototype by building visualizations in live JavaScript notebooks. Collaborate with your team and decide which concepts to build out.
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