|
| 1 | +"use client" |
| 2 | + |
| 3 | +import { useEffect, useRef } from "react" |
| 4 | +import * as d3 from "d3" |
| 5 | + |
| 6 | +export default function ForceGraph({ data }) { |
| 7 | + const svgRef = useRef(null) |
| 8 | + |
| 9 | + useEffect(() => { |
| 10 | + if (!data) return |
| 11 | + |
| 12 | + const width = 928 |
| 13 | + const height = 600 |
| 14 | + |
| 15 | + // Remove old SVG content |
| 16 | + d3.select(svgRef.current).selectAll("*").remove() |
| 17 | + |
| 18 | + // Build hierarchy |
| 19 | + const root = d3.hierarchy(data) |
| 20 | + const links = root.links() |
| 21 | + const nodes = root.descendants() |
| 22 | + |
| 23 | + // Force simulation |
| 24 | + const simulation = d3 |
| 25 | + .forceSimulation(nodes) |
| 26 | + .force( |
| 27 | + "link", |
| 28 | + d3 |
| 29 | + .forceLink(links) |
| 30 | + .id((d) => d.id) |
| 31 | + .distance(0) |
| 32 | + .strength(1) |
| 33 | + ) |
| 34 | + .force("charge", d3.forceManyBody().strength(-50)) |
| 35 | + .force("x", d3.forceX()) |
| 36 | + .force("y", d3.forceY()) |
| 37 | + |
| 38 | + // Create SVG |
| 39 | + const svg = d3 |
| 40 | + .select(svgRef.current) |
| 41 | + .attr("width", width) |
| 42 | + .attr("height", height) |
| 43 | + .attr("viewBox", [-width / 2, -height / 2, width, height]) |
| 44 | + .style("max-width", "100%") |
| 45 | + .style("height", "auto") |
| 46 | + |
| 47 | + // Draw links |
| 48 | + const link = svg.append("g").attr("stroke", "#999").attr("stroke-opacity", 0.6).selectAll("line").data(links).join("line") |
| 49 | + |
| 50 | + // Drag behavior |
| 51 | + function drag(simulation) { |
| 52 | + function dragstarted(event, d) { |
| 53 | + if (!event.active) simulation.alphaTarget(0.3).restart() |
| 54 | + d.fx = d.x |
| 55 | + d.fy = d.y |
| 56 | + } |
| 57 | + function dragged(event, d) { |
| 58 | + d.fx = event.x |
| 59 | + d.fy = event.y |
| 60 | + } |
| 61 | + function dragended(event, d) { |
| 62 | + if (!event.active) simulation.alphaTarget(0) |
| 63 | + d.fx = null |
| 64 | + d.fy = null |
| 65 | + } |
| 66 | + return d3.drag().on("start", dragstarted).on("drag", dragged).on("end", dragended) |
| 67 | + } |
| 68 | + |
| 69 | + // Draw nodes |
| 70 | + const node = svg |
| 71 | + .append("g") |
| 72 | + .attr("fill", "#fff") |
| 73 | + .attr("stroke", "#000") |
| 74 | + .attr("stroke-width", 1.5) |
| 75 | + .selectAll("circle") |
| 76 | + .data(nodes) |
| 77 | + .join("circle") |
| 78 | + .attr("fill", (d) => (d.children ? null : "#000")) |
| 79 | + .attr("stroke", (d) => (d.children ? null : "#fff")) |
| 80 | + .attr("r", 3.5) |
| 81 | + .call(drag(simulation)) |
| 82 | + |
| 83 | + node.append("title").text((d) => d.data.name) |
| 84 | + |
| 85 | + // Update positions on tick |
| 86 | + simulation.on("tick", () => { |
| 87 | + link |
| 88 | + .attr("x1", (d) => d.source.x) |
| 89 | + .attr("y1", (d) => d.source.y) |
| 90 | + .attr("x2", (d) => d.target.x) |
| 91 | + .attr("y2", (d) => d.target.y) |
| 92 | + |
| 93 | + node.attr("cx", (d) => d.x).attr("cy", (d) => d.y) |
| 94 | + }) |
| 95 | + |
| 96 | + return () => simulation.stop() |
| 97 | + }, [data]) |
| 98 | + |
| 99 | + return <svg ref={svgRef}></svg> |
| 100 | +} |
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