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D3实现TREE树状图

2015-12-26 23:09 429 查看
<html>
<head>
<meta charset="utf-8">
<title>树状图</title>
<style>

.node circle {
fill: #fff;
stroke: steelblue;
stroke-width: 1.5px;
}

.node {
font: 12px sans-serif;
}

.link {
fill: none;
stroke: #ccc;
stroke-width: 1.5px;
}

</style>
</head>
<body>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script>

var width = 500,
height = 500;

var tree = d3.layout.tree()
.size([width, height-200])
.separation(function(a, b) { return (a.parent == b.parent ? 1 : 2); });

var diagonal = d3.svg.diagonal()
.projection(function(d) { return [d.y, d.x]; });

var svg = d3.select("body").append("svg")
.attr("width", width)
.attr("height", height)
.append("g")
.attr("transform", "translate(40,0)");

d3.json("city_tree.json", function(error, root) {

var nodes = tree.nodes(root);
var links = tree.links(nodes);

console.log(nodes);
console.log(links);

var link = svg.selectAll(".link")
.data(links)
.enter()
.append("path")
.attr("class", "link")
.attr("d", diagonal);

var node = svg.selectAll(".node")
.data(nodes)
.enter()
.append("g")
.attr("class", "node")
.attr("transform", function(d) { return "translate(" + d.y + "," + d.x + ")"; })

node.append("circle")
.attr("r", 4.5);

node.append("text")
.attr("dx", function(d) { return d.children ? -8 : 8; })
.attr("dy", 3)
.style("text-anchor", function(d) { return d.children ? "end" : "start"; })
.text(function(d) { return d.name; });
});

</script>

</body>
</html>


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