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126 lines
3.6 KiB
HTML
126 lines
3.6 KiB
HTML
4 years ago
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8" />
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<title>d3 graph</title>
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<script src="https://d3js.org/d3.v4.js"></script>
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</head>
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<body>
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<div id="my_dataviz"></div>
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<script>
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// set the dimensions and margins of the graph
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var margin = { top: 0, right: 0, bottom: 0, left: 0 },
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width = 2000 - margin.left - margin.right,
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height = 2000 - margin.top - margin.bottom;
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// append the svg object to the body of the page
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var svg = d3
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.select("#my_dataviz")
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.append("svg")
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.attr("width", width + margin.left + margin.right)
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.attr("height", height + margin.top + margin.bottom)
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.append("g")
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.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
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d3.json("data_network.json", function(data) {
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// Initialize the links
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var link = svg
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.selectAll("line")
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.data(data.links)
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.enter()
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.append("line")
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.style("stroke", "#aaa");
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// Initialize the nodes
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var node = svg
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.selectAll("circle")
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.data(data.nodes)
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.enter()
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.append("circle")
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.attr("r", 5)
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.style("fill", "black");
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var text = svg
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.selectAll("text")
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.data(data.nodes)
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.enter()
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.append("text")
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.text(function(d) {
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return d.name;
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})
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.style("font-size", "18px")
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.style("color", "blue");
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// Let's list the force we wanna apply on the network
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var simulation = d3
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.forceSimulation(data.nodes) // Force algorithm is applied to data.nodes
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.force(
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"link",
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d3
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.forceLink() // This force provides links between nodes
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.id(function(d) {
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return d.id;
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}) // This provide the id of a node
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.links(data.links) // and this the list of links
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)
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.force("charge", d3.forceManyBody().strength(-500)) // This adds repulsion between nodes. Play with the -400 for the repulsion strength
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.force("center", d3.forceCenter(width / 2, height / 2)) // This force attracts nodes to the center of the svg area
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.on("end", ticked);
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var dragDrop = d3
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.drag()
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.on("start", function(node) {
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node.cx = node.x;
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node.cy = node.y;
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})
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.on("drag", function(node) {
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simulation.alphaTarget(0.7).restart();
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node.cx = d3.event.x;
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node.cy = d3.event.y;
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})
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.on("end", function(node) {
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if (!d3.event.active) {
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simulation.alphaTarget(0);
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}
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node.cx = null;
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node.cy = null;
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});
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// This function is run at each iteration of the force algorithm, updating the nodes position.
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function ticked() {
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link
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.attr("x1", function(d) {
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return d.source.x;
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})
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.attr("y1", function(d) {
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return d.source.y;
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})
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.attr("x2", function(d) {
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return d.target.x;
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})
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.attr("y2", function(d) {
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return d.target.y;
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});
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node
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.attr("cx", function(d) {
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return d.x + 6;
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})
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.attr("cy", function(d) {
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return d.y - 6;
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});
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text
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.attr("dx", function(d) {
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return d.x + 6;
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})
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.attr("dy", function(d) {
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return d.y - 6;
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});
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}
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});
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</script>
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</body>
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</html>
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