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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| .link { | |
| stroke: #aaa; | |
| } | |
| .node { | |
| pointer-events: all; | |
| stroke: none; | |
| stroke-width: 40px; | |
| } | |
| </style> | |
| <svg width="960" height="600"></svg> | |
| <script src="//d3js.org/d3.v4.0.0-rc.2.js"></script> | |
| <script> | |
| var nodes = [ | |
| {"id": 1, "name": "server 1"}, | |
| {"id": 2, "name": "server 2"}, | |
| {"id": 3, "name": "server 3"}, | |
| {"id": 4, "name": "server 4"}, | |
| {"id": 5, "name": "server 5"}, | |
| {"id": 6, "name": "server 6"}, | |
| {"id": 7, "name": "server 7"}, | |
| {"id": 8, "name": "server 8"}, | |
| {"id": 9, "name": "server 9"} | |
| ] | |
| var links = [ | |
| {source: 1, target: 2}, | |
| {source: 1, target: 3}, | |
| {source: 1, target: 4}, | |
| {source: 2, target: 5}, | |
| {source: 2, target: 6}, | |
| {source: 3, target: 7}, | |
| {source: 5, target: 8}, | |
| {source: 6, target: 9}, | |
| ] | |
| var index = 10; | |
| var svg = d3.select("svg"), | |
| width = +svg.attr("width"), | |
| height = +svg.attr("height"), | |
| node, | |
| link; | |
| var simulation = d3.forceSimulation() | |
| .force("link", d3.forceLink().id(function(d) { return d.id; })) | |
| .force("charge", d3.forceManyBody()) | |
| .force("center", d3.forceCenter(width / 2, height / 2)) | |
| .on("tick", ticked); | |
| var drag = d3.drag() | |
| .on("start", dragstarted) | |
| .on("drag", dragged) | |
| .on("end", dragended); | |
| update(); | |
| function update() { | |
| link = svg.selectAll(".link") | |
| .data(links, function(d) { return d.target.id; }) | |
| var linkEnter = link.enter().append("line") | |
| .attr("class", "link"); | |
| link = linkEnter.merge(link); | |
| node = svg.selectAll(".node") | |
| .data(nodes, function(d) { return d.id; }) | |
| var nodeEnter = node.enter().append("g") | |
| .attr("class", "node") | |
| .on("click", click) | |
| .call(drag); | |
| nodeEnter.append("circle") | |
| .attr("r", 2.5) | |
| nodeEnter.append("title") | |
| .text(function(d) { return d.id; }); | |
| nodeEnter.append("text") | |
| .attr("dy", 3) | |
| .text(function(d) { return d.name; }); | |
| node = nodeEnter.merge(node); | |
| simulation | |
| .nodes(nodes); | |
| simulation.force("link") | |
| .links(links); | |
| } | |
| function click(d) { | |
| var target = {id: index, name: "server " + index}; | |
| nodes.push(target); | |
| links.push({source: d, target: target}); | |
| index++; | |
| update(); | |
| } | |
| function ticked() { | |
| link | |
| .attr("x1", function(d) { return d.source.x; }) | |
| .attr("y1", function(d) { return d.source.y; }) | |
| .attr("x2", function(d) { return d.target.x; }) | |
| .attr("y2", function(d) { return d.target.y; }); | |
| node | |
| .attr("transform", function(d) { return "translate(" + d.x + ", " + d.y + ")"; }); | |
| } | |
| function dragstarted(d) { | |
| if (!d3.event.active) simulation.alphaTarget(0.3).restart() | |
| } | |
| function dragged(d) { | |
| d.fx = d3.event.x; | |
| d.fy = d3.event.y; | |
| } | |
| function dragended(d) { | |
| if (!d3.event.active) simulation.alphaTarget(0); | |
| d.fx = undefined; | |
| d.fy = undefined; | |
| } | |
| </script> |
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