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September 15, 2015 18:10
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<!DOCTYPE html> | |
<html lang="en"> | |
<head> | |
<meta charset="utf-8"> | |
<title>Collapsible Tree Example</title> | |
<style> | |
.node circle { | |
fill: #fff; | |
stroke: steelblue; | |
stroke-width: 3px; | |
} | |
.node text { font: 12px sans-serif; } | |
.link { | |
fill: none; | |
stroke: #ccc; | |
stroke-width: 2px; | |
} | |
</style> | |
</head> | |
<body> | |
<!-- load the d3.js library --> | |
<script src="http://d3js.org/d3.v3.min.js"></script> | |
<script> | |
// ************** Generate the tree diagram ***************** | |
var margin = {top: 20, right: 120, bottom: 20, left: 120}, | |
width = 960 - margin.right - margin.left, | |
height = 500 - margin.top - margin.bottom; | |
var i = 0; | |
var tree = d3.layout.tree() | |
.size([height, width]); | |
var diagonal = d3.svg.diagonal() | |
.projection(function(d) { return [d.y, d.x]; }); | |
var svg = d3.select("body").append("svg") | |
.attr("width", width + margin.right + margin.left) | |
.attr("height", height + margin.top + margin.bottom) | |
.append("g") | |
.attr("transform", "translate(" + margin.left + "," + margin.top + ")"); | |
// load the external data | |
d3.json("treeData.json", function(error, treeData) { | |
root = treeData[0]; | |
update(root); | |
}); | |
function update(source) { | |
// Compute the new tree layout. | |
var nodes = tree.nodes(root).reverse(), | |
links = tree.links(nodes); | |
// Normalize for fixed-depth. | |
nodes.forEach(function(d) { d.y = d.depth * 180; }); | |
// Declare the nodes… | |
var node = svg.selectAll("g.node") | |
.data(nodes, function(d) { return d.id || (d.id = ++i); }); | |
// Enter the nodes. | |
var nodeEnter = node.enter().append("g") | |
.attr("class", "node") | |
.attr("transform", function(d) { | |
return "translate(" + d.y + "," + d.x + ")"; }); | |
nodeEnter.append("circle") | |
.attr("r", 10) | |
.style("fill", "#fff"); | |
nodeEnter.append("text") | |
.attr("x", function(d) { | |
return d.children || d._children ? -13 : 13; }) | |
.attr("dy", ".35em") | |
.attr("text-anchor", function(d) { | |
return d.children || d._children ? "end" : "start"; }) | |
.text(function(d) { return d.name; }) | |
.style("fill-opacity", 1); | |
// Declare the links… | |
var link = svg.selectAll("path.link") | |
.data(links, function(d) { return d.target.id; }); | |
// Enter the links. | |
link.enter().insert("path", "g") | |
.attr("class", "link") | |
.attr("d", diagonal); | |
} | |
</script> | |
</body> | |
</html> |
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