Force layout (with links).
From D3 in Depth book by Peter Cook.
Last active
March 14, 2019 13:54
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Force layout (with links)
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| license: gpl-3.0 | |
| height: 320 | |
| border: no |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <head> | |
| <title>Force layout (with links)</title> | |
| </head> | |
| <style> | |
| circle { | |
| fill: cadetblue; | |
| } | |
| line { | |
| stroke: #ccc; | |
| } | |
| text { | |
| text-anchor: middle; | |
| font-family: "Helvetica Neue", Helvetica, sans-serif; | |
| fill: #666; | |
| font-size: 16px; | |
| } | |
| </style> | |
| <body> | |
| <div id="content"> | |
| <svg width="400" height="300"> | |
| <g class="links"></g> | |
| <g class="nodes"></g> | |
| </svg> | |
| </div> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/4.2.2/d3.min.js"></script> | |
| <script> | |
| var width = 400, height = 300 | |
| var nodes = [ | |
| {name: 'A'}, | |
| {name: 'B'}, | |
| {name: 'C'}, | |
| {name: 'D'}, | |
| {name: 'E'}, | |
| {name: 'F'}, | |
| {name: 'G'}, | |
| {name: 'H'}, | |
| ] | |
| var links = [ | |
| {source: 0, target: 1}, | |
| {source: 0, target: 2}, | |
| {source: 0, target: 3}, | |
| {source: 1, target: 6}, | |
| {source: 3, target: 4}, | |
| {source: 3, target: 7}, | |
| {source: 4, target: 5}, | |
| {source: 4, target: 7} | |
| ] | |
| var simulation = d3.forceSimulation(nodes) | |
| .force('charge', d3.forceManyBody().strength(-100)) | |
| .force('center', d3.forceCenter(width / 2, height / 2)) | |
| .force('link', d3.forceLink().links(links)) | |
| .on('tick', ticked); | |
| function updateLinks() { | |
| var u = d3.select('.links') | |
| .selectAll('line') | |
| .data(links) | |
| u.enter() | |
| .append('line') | |
| .merge(u) | |
| .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 | |
| }) | |
| u.exit().remove() | |
| } | |
| function updateNodes() { | |
| u = d3.select('.nodes') | |
| .selectAll('text') | |
| .data(nodes) | |
| u.enter() | |
| .append('text') | |
| .text(function(d) { | |
| return d.name | |
| }) | |
| .merge(u) | |
| .attr('x', function(d) { | |
| return d.x | |
| }) | |
| .attr('y', function(d) { | |
| return d.y | |
| }) | |
| .attr('dy', function(d) { | |
| return 5 | |
| }) | |
| u.exit().remove() | |
| } | |
| function ticked() { | |
| updateLinks() | |
| updateNodes() | |
| } | |
| </script> | |
| </body> | |
| </html> |
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