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forked from mbostock's block: Collapsible Force Layout (Sample diagram)
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June 28, 2017 15:39
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Collapsible Force Layout (Sample 4 diagram w/ json file)
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <title>Force-Directed Graph</title> | |
| <style> | |
| .node { | |
| cursor: pointer; | |
| stroke: #3182bd; | |
| stroke-width: 1.5px; | |
| } | |
| .link { | |
| fill: none; | |
| stroke: #9ecae1; | |
| stroke-width: 2.5px; | |
| } | |
| </style> | |
| <body> | |
| <p align="center"><b>Sample 4</b></p> | |
| <script src="//d3js.org/d3.v3.min.js"></script> | |
| <script> | |
| var width = 960, | |
| height = 600, | |
| root; | |
| var force = d3.layout.force() | |
| .size([width, height]) | |
| .on("tick", tick); | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", width) | |
| .attr("height", height); | |
| var link = svg.selectAll(".link"), | |
| node = svg.selectAll(".node"); | |
| d3.json("Sample4.json", function(error, json) { | |
| if (error) throw error; | |
| root = json; | |
| update(); | |
| }); | |
| function update() { | |
| var nodes = flatten(root), | |
| links = d3.layout.tree().links(nodes); | |
| // Restart the force layout. | |
| force | |
| .nodes(nodes) | |
| .links(links) | |
| .start(); | |
| // Update the links… | |
| link = link.data(links, function(d) { return d.target.id; }); | |
| // Exit any old links. | |
| link.exit().remove(); | |
| // Enter any new links. | |
| link.enter().insert("line", ".node") | |
| .attr("class", "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; }); | |
| // Update the nodes… | |
| node = node.data(nodes, function(d) { return d.id; }).style("fill", color); | |
| // Exit any old nodes. | |
| node.exit().remove(); | |
| // Enter any new nodes. | |
| node.enter().append("circle") | |
| .attr("class", "node") | |
| .attr("cx", function(d) { return d.x; }) | |
| .attr("cy", function(d) { return d.y; }) | |
| .attr("r", function(d) { return Math.sqrt(d.size)*2 || 4.5; }) | |
| .style("fill", color) | |
| .on("click", click) | |
| .call(force.drag); | |
| } | |
| function tick() { | |
| 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("cx", function(d) { return d.x; }) | |
| .attr("cy", function(d) { return d.y; }); | |
| } | |
| // Color leaf nodes orange, and packages white or blue. | |
| function color(d) { | |
| return d._children ? "#3182bd" : d.children ? "#c6dbef" : "#fd8d3c"; | |
| } | |
| // Toggle children on click. | |
| function click(d) { | |
| if (!d3.event.defaultPrevented) { | |
| if (d.children) { | |
| d._children = d.children; | |
| d.children = null; | |
| } else { | |
| d.children = d._children; | |
| d._children = null; | |
| } | |
| update(); | |
| } | |
| } | |
| // Returns a list of all nodes under the root. | |
| function flatten(root) { | |
| var nodes = [], i = 0; | |
| function recurse(node) { | |
| if (node.children) node.children.forEach(recurse); | |
| if (!node.id) node.id = ++i; | |
| nodes.push(node); | |
| } | |
| recurse(root); | |
| return nodes; | |
| } | |
| </script> |
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| { | |
| "name": "1", | |
| "children": [ | |
| { | |
| "name": "deer", | |
| "size": 30 | |
| }, | |
| { | |
| "name": "elk", | |
| "size": 30 | |
| }, | |
| { | |
| "name": "blackbuck", | |
| "size": 30 | |
| }, | |
| { | |
| "name": "2", | |
| "children": [ | |
| { | |
| "name": "pony", | |
| "size": 30 | |
| }, | |
| { | |
| "name": "mule", | |
| "size": 30 | |
| }, | |
| { | |
| "name": "male horse", | |
| "size": 30 | |
| },{ | |
| "name": "3", | |
| "children": [ | |
| { | |
| "name": "warehorse", | |
| "size": 30 | |
| }, | |
| { | |
| "name": "4", | |
| "children": [ | |
| { | |
| "name": "goat", | |
| "size": 30 | |
| }, | |
| { | |
| "name": "5", | |
| "children": [ | |
| { | |
| "name": "sheep", | |
| "size": 30 | |
| }, | |
| { | |
| "name": "6", | |
| "children": [ | |
| { | |
| "name": "bison", | |
| "size": 30 | |
| }, | |
| { | |
| "name": "7", | |
| "children": [ | |
| { | |
| "name": "zebra", | |
| "size": 30 | |
| } | |
| ]} | |
| ]} | |
| ]} | |
| ] | |
| } | |
| ] | |
| } | |
| ] | |
| } | |
| ] | |
| } |
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