Created
March 13, 2017 18:08
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Network with Click and Drag
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| { | |
| "nodes":[ | |
| {"name":"node1","group":1}, | |
| {"name":"node2","group":2}, | |
| {"name":"node3","group":2}, | |
| {"name":"node4","group":3} | |
| ], | |
| "links":[ | |
| {"source":2,"target":1,"weight":1}, | |
| {"source":0,"target":2,"weight":3} | |
| ] | |
| } |
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| <!doctype html> | |
| <meta charset="utf-8"> | |
| <html> | |
| <head> | |
| <title>Basic Network</title> | |
| <style> | |
| body { | |
| font-family: "Trebuchet MS", Helvetica, sans-serif; | |
| } | |
| form { float: left; margin: 10px; } | |
| .field { margin: 15px 0; } | |
| #chart { | |
| border: 1px solid #ccc; | |
| } | |
| select { | |
| padding: 3px; | |
| } | |
| .links line { | |
| stroke: #999; | |
| stroke-opacity: 0.6; | |
| } | |
| .node circle { | |
| stroke: #fff; | |
| stroke-width: 1.5px; | |
| } | |
| .node text { | |
| font-size: 12px; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <svg id="chart" width="500" height="500"></svg> | |
| <script src="https://d3js.org/d3.v4.min.js"></script> | |
| <!-- Chart related script --> | |
| <script> | |
| var svg = d3.select("svg"), | |
| width = +svg.attr("width"), | |
| height = +svg.attr("height"); | |
| var link = svg.append("g") | |
| .attr("class", "links") | |
| .selectAll("line"); | |
| var node = svg.append("g") | |
| .attr("class", "nodes") | |
| .selectAll("g.node"); | |
| var info = svg.append("text") | |
| .attr("class","info") | |
| .attr("transform","translate(10,20)"); | |
| var radius = "6", | |
| maxradius = "8"; | |
| var color = d3.scaleOrdinal() | |
| .range(["#111f33", "#5e88a2", "#d7e3ea"]); | |
| var simulation = d3.forceSimulation() | |
| .force("link", d3.forceLink().id(function(d) { | |
| return d.index; })) | |
| .force("charge", d3.forceManyBody().distanceMax(height/2)) | |
| .force("center", d3.forceCenter(width / 2, height / 2)); | |
| var url = "data.json"; | |
| getData(url); | |
| //get chart data | |
| function getData(url){ | |
| d3.json(url, function (error, data) { | |
| if (error) throw error; | |
| console.log(data); | |
| buildNetwork(data); | |
| }); | |
| } | |
| function buildNetwork(data){ | |
| link = link.data(data.links); | |
| link.exit().remove(); | |
| link = link.enter().append("line") | |
| .attr("stroke-width", function(d) { return 2; }) | |
| .merge(link); | |
| node = node.data(data.nodes); | |
| node.exit().remove(); | |
| node = node.enter().append("g") | |
| .attr("class", "node") | |
| .merge(node) | |
| .on("click", loadInfo) | |
| .call(d3.drag() | |
| .on("start", dragstarted) | |
| .on("drag", dragged) | |
| .on("end", dragended)) | |
| .on("mouseover", function() { | |
| d3.select(this).select("circle").attr("r", maxradius); | |
| }) | |
| .on("mouseout", function() { | |
| d3.select(this).select("circle").attr("r", radius); | |
| }); | |
| node.append("circle") | |
| .attr("r", radius) | |
| .attr("fill", function(d) { return color(d.group); }); | |
| node.append("text") | |
| .attr("text-anchor", "middle") | |
| .text(function(d) { return d.id; }); | |
| simulation | |
| .nodes(data.nodes) | |
| .on("tick", ticked); | |
| simulation.force("link") | |
| .links(data.links) | |
| .distance(function(d) { | |
| return 30; | |
| }); | |
| simulation.alpha(1).restart(); | |
| 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) { | |
| var boundx = Math.max(maxradius, Math.min(width - maxradius, d.x)); | |
| var boundy = Math.max(maxradius, Math.min(height - maxradius, d.y)); | |
| return "translate(" + boundx + "," + boundy + ")"; | |
| }); | |
| } | |
| } | |
| function loadInfo(d,i){ | |
| console.log('hello'); | |
| if (d3.event.defaultPrevented) return; // dragged | |
| console.log(d3.event); | |
| console.log('loadInfo'); | |
| var information = "Name: "+ d.name + ", Group: " + d.group; | |
| info.text(information); | |
| } | |
| function dragstarted(d) { | |
| if (!d3.event.active) simulation.alphaTarget(0.6).restart(); | |
| d.fx = d.x; | |
| d.fy = d.y; | |
| } | |
| function dragged(d) { | |
| d.fx = Math.max(maxradius, Math.min(width - maxradius, d3.event.x)); | |
| d.fy = Math.max(maxradius, Math.min(height - maxradius, d3.event.y)); | |
| } | |
| function dragended(d) { | |
| if (!d3.event.active) simulation.alphaTarget(0); | |
| d.fx = null; | |
| d.fy = null; | |
| } | |
| </script> | |
| </body> | |
| </html> |
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