d3
Version:
A small, free JavaScript library for manipulating documents based on data.
140 lines (118 loc) • 3.5 kB
HTML
<html>
<head>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8">
<title>Node-Link Tree</title>
<script type="text/javascript" src="../../d3.js"></script>
<script type="text/javascript" src="../../d3.layout.js"></script>
<style type="text/css">
circle.node {
cursor: pointer;
fill: #fff;
stroke: steelblue;
stroke-width: 1.5px;
}
path.link {
fill: none;
stroke: #ccc;
stroke-width: 1.5px;
}
</style>
</head>
<body>
<div id="chart"></div>
<script type="text/javascript">
var w = 960,
h = 2000,
i = 0,
duration = 500,
root;
var tree = d3.layout.tree()
.size([h, w - 160]);
var diagonal = d3.svg.diagonal()
.projection(function(d) { return [d.y, d.x]; });
var vis = d3.select("#chart").append("svg:svg")
.attr("width", w)
.attr("height", h)
.append("svg:g")
.attr("transform", "translate(40,0)");
d3.json("../data/flare.json", function(json) {
json.x0 = 800;
json.y0 = 0;
update(root = json);
});
function update(source) {
// Compute the new tree layout.
var nodes = tree.nodes(root).reverse();
// Update the nodes…
var node = vis.selectAll("circle.node")
.data(nodes, function(d) { return d.id || (d.id = ++i); });
// Enter any new nodes at the parent's previous position.
node.enter().append("svg:circle")
.attr("class", "node")
.attr("cx", function(d) { return source.y0; })
.attr("cy", function(d) { return source.x0; })
.attr("r", 4.5)
.style("fill", function(d) { return d._children ? "lightsteelblue" : "#fff"; })
.on("click", click)
.transition()
.duration(duration)
.attr("cx", function(d) { return d.y; })
.attr("cy", function(d) { return d.x; });
// Transition nodes to their new position.
node.transition()
.duration(duration)
.attr("cx", function(d) { return d.y; })
.attr("cy", function(d) { return d.x; })
.style("fill", function(d) { return d._children ? "lightsteelblue" : "#fff"; });
// Transition exiting nodes to the parent's new position.
node.exit().transition()
.duration(duration)
.attr("cx", function(d) { return source.y; })
.attr("cy", function(d) { return source.x; })
.remove();
// Update the links…
var link = vis.selectAll("path.link")
.data(tree.links(nodes), function(d) { return d.target.id; });
// Enter any new links at the parent's previous position.
link.enter().insert("svg:path", "circle")
.attr("class", "link")
.attr("d", function(d) {
var o = {x: source.x0, y: source.y0};
return diagonal({source: o, target: o});
})
.transition()
.duration(duration)
.attr("d", diagonal);
// Transition links to their new position.
link.transition()
.duration(duration)
.attr("d", diagonal);
// Transition exiting nodes to the parent's new position.
link.exit().transition()
.duration(duration)
.attr("d", function(d) {
var o = {x: source.x, y: source.y};
return diagonal({source: o, target: o});
})
.remove();
// Stash the old positions for transition.
nodes.forEach(function(d) {
d.x0 = d.x;
d.y0 = d.y;
});
}
// Toggle children on click.
function click(d) {
if (d.children) {
d._children = d.children;
d.children = null;
} else {
d.children = d._children;
d._children = null;
}
update(d);
}
</script>
</body>
</html>