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April 3, 2020 01:18
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d3 - Migration from v3 to v5 - forceSimulation - Adding New [data+element]s - Minimal Example
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| license: gpl-3.0 | |
| height: 800 | |
| scrolling: no | |
| border: yes |
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| <!DOCTYPE html> | |
| <h1><code>d3.js</code>, Version 3, Force Layout primer - how should this be converted to Version 5?</h1> | |
| <h2>For study purposes only</h2> | |
| <ul> | |
| <li>Cleaned up an example from : http://bl.ocks.org/tgk/6068367</li> | |
| <li>Cleaned up example uses d3 version 3.</li> | |
| <li>Original example license : none</li> | |
| <li>Original example uses d3 version 3.</li> | |
| </ul> | |
| <script src="https://d3js.org/d3.v3.min.js"></script> | |
| <script src="../../../third-party/live.js"></script> | |
| <script> | |
| 'use strict' | |
| let p = thing => JSON.stringify ( thing, null, 2 ) | |
| let width = 500, | |
| height = 500 | |
| let dataArray = [ {} ] | |
| let simulation = d3.layout.force () | |
| .size ([width, height]) | |
| .nodes ( dataArray ) // initialize with a single node | |
| .charge (-500) | |
| .on ( 'tick', tickHandler) | |
| /* Necessary, but insufficient replacement: | |
| let simulation = d3.forceSimulation ( dataArray ) | |
| .force ( 'charge', d3.forceManyBody ().strength ( -1000 ) ) | |
| .force ( 'x', d3.forceX () ) | |
| .force ( 'y', d3.forceY () ) | |
| .alphaTarget ( 1 ) | |
| .on ( 'tick', tickHandler ) | |
| */ | |
| let svg = d3.select ( 'body' ).append ( 'svg' ) | |
| .attr ( 'width', width ) | |
| .attr ( 'height', height ) | |
| .attr ( 'style', 'background-color:#eee' ) | |
| .on ( 'mousedown', mousedownCanvas) | |
| let circles = svg.selectAll ( 'circle' ) | |
| function tickHandler () { | |
| circles .attr ( 'cx', function (d) { return d.x } ) | |
| .attr ( 'cy', function (d) { return d.y } ) | |
| } | |
| function restart () { | |
| circles = circles.data ( dataArray ) | |
| circles.enter ().insert ( 'circle').attr ( 'r', 5 ) | |
| circles.exit ().remove () | |
| simulation.start () | |
| } | |
| restart () | |
| //* | |
| function mousedownCanvas () { | |
| let point = d3.mouse (this), | |
| node = { x: point[0], y: point[1] } | |
| dataArray.push (node) | |
| restart () | |
| } | |
| function addNode () { | |
| dataArray.push ( { | |
| x: width / 2 + Math.random() * 150, | |
| y: height / 2 + Math.random() * 150 | |
| } ) | |
| restart() | |
| } | |
| setTimeout ( addNode, 1000 ) | |
| setTimeout ( addNode, 2000 ) | |
| setTimeout ( addNode, 3000 ) | |
| setTimeout ( addNode, 4000 ) | |
| //*/ | |
| </script> |
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