87 lines
2 KiB
JavaScript
87 lines
2 KiB
JavaScript
// const nodes = [
|
|
// {"id": "Alice"},
|
|
// {"id": "Bob"},
|
|
// {"id": "Carol"}
|
|
// ];
|
|
//
|
|
// const links = [
|
|
// {"source": 0, "target": 1}, // Alice → Bob
|
|
// {"source": 1, "target": 0} // Bob → Carol
|
|
// ];
|
|
|
|
const graphEl = document.getElementById("graph");
|
|
|
|
const drag = (simulation) => {
|
|
function dragstarted(event, d) {
|
|
if (!event.active) simulation.alphaTarget(0.3).restart();
|
|
d.fx = d.x;
|
|
d.fy = d.y;
|
|
}
|
|
|
|
function dragged(event, d) {
|
|
d.fx = event.x;
|
|
d.fy = event.y;
|
|
}
|
|
|
|
function dragended(event, d) {
|
|
if (!event.active) simulation.alphaTarget(0);
|
|
d.fx = null;
|
|
d.fy = null;
|
|
}
|
|
|
|
return d3.drag()
|
|
.on("start", dragstarted)
|
|
.on("drag", dragged)
|
|
.on("end", dragended);
|
|
}
|
|
|
|
|
|
const simulation = d3.forceSimulation(nodes)
|
|
.force("link", d3.forceLink(links).id(d => d.id))
|
|
.force("charge", d3.forceManyBody())
|
|
.force("x", d3.forceX())
|
|
.force("y", d3.forceY());
|
|
|
|
setTimeout(() => {
|
|
const width = graphEl.clientWidth;
|
|
const height = graphEl.clientHeight;
|
|
|
|
const svg = d3.create("svg")
|
|
.attr("viewBox", [-width / 2, -height / 2, 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", "red")
|
|
.call(drag(simulation));
|
|
|
|
node.append("title")
|
|
.text(d => d.id);
|
|
|
|
simulation.on("tick", () => {
|
|
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);
|
|
|
|
node
|
|
.attr("cx", d => d.x)
|
|
.attr("cy", d => d.y);
|
|
});
|
|
|
|
|
|
graphEl.appendChild(svg.node());
|
|
}, 0);
|