70 lines
1.8 KiB
JavaScript
70 lines
1.8 KiB
JavaScript
var svg = d3.select("svg"),
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width = +svg.attr("width"),
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height = +svg.attr("height");
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var color = d3.scaleOrdinal(d3.schemeCategory20);
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var simulation = d3.forceSimulation()
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.force("link", d3.forceLink().id(function(d) { return d.id; }))
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.force("charge", d3.forceManyBody())
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.force("center", d3.forceCenter(width / 2, height / 2));
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d3.json("miserables.json", function(error, graph) {
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if (error) throw error;
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var link = svg.append("g")
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.attr("class", "links")
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.selectAll("line")
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.data(graph.links)
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.enter().append("line")
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.attr("stroke-width", function(d) { return Math.sqrt(d.value); });
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var node = svg.append("g")
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.attr("class", "nodes")
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.selectAll("text")
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.data(graph.nodes)
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.enter().append("text")
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.text(function(d) { return d.id; })
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.attr("fill", function(d) { return color(d.group); })
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.call(d3.drag()
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.on("start", dragstarted)
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.on("drag", dragged)
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.on("end", dragended));
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simulation
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.nodes(graph.nodes)
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.on("tick", ticked);
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simulation.force("link")
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.links(graph.links);
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function ticked() {
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link
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.attr("x1", function(d) { return d.source.x; })
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.attr("y1", function(d) { return d.source.y; })
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.attr("x2", function(d) { return d.target.x; })
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.attr("y2", function(d) { return d.target.y; });
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node
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.attr("x", function(d) { return d.x; })
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.attr("y", function(d) { return d.y; });
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}
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});
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function dragstarted(d) {
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if (!d3.event.active) simulation.alphaTarget(0.3).restart();
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d.fx = d.x;
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d.fy = d.y;
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}
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function dragged(d) {
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d.fx = d3.event.x;
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d.fy = d3.event.y;
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}
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function dragended(d) {
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if (!d3.event.active) simulation.alphaTarget(0);
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d.fx = null;
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d.fy = null;
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}
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