137 строки
3.2 KiB
HTML
137 строки
3.2 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html;charset=utf-8">
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<title>Force-Directed Graph</title>
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<script type="text/javascript" src="../../d3.js"></script>
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<script type="text/javascript" src="../../d3.geom.js"></script>
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<script type="text/javascript" src="../../d3.layout.js"></script>
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<style type="text/css">
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circle.node {
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cursor: pointer;
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stroke: #3182bd;
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stroke-width: 1.5px;
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}
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line.link {
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fill: none;
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stroke: #9ecae1;
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stroke-width: 1.5px;
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}
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</style>
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</head>
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<body>
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<div id="chart"></div>
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<script type="text/javascript">
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var w = 960,
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h = 500,
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root;
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var force = d3.layout.force()
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.size([w, h]);
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var vis = d3.select("#chart").append("svg:svg")
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.attr("width", w)
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.attr("height", h);
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d3.json("../data/flare.json", function(json) {
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root = json;
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update();
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});
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function update() {
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var nodes = flatten(root),
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links = d3.layout.tree().links(nodes);
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// Restart the force layout.
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force
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.nodes(nodes)
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.links(links)
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.start();
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// Update the links…
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var link = vis.selectAll("line.link")
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.data(links, function(d) { return d.target.id; });
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// Enter any new links.
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link.enter().insert("svg:line", ".node")
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.attr("class", "link")
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.attr("x1", function(d) { return d.source.x; })
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.attr("y1", function(d) { return d.source.y; })
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.attr("x2", function(d) { return d.target.x; })
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.attr("y2", function(d) { return d.target.y; });
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// Exit any old links.
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link.exit().remove();
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// Update the nodes…
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var node = vis.selectAll("circle.node")
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.data(nodes, function(d) { return d.id; })
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.style("fill", color);
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// Enter any new nodes.
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node.enter().append("svg:circle")
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.attr("class", "node")
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.attr("cx", function(d) { return d.x; })
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.attr("cy", function(d) { return d.y; })
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.attr("r", function(d) { return Math.sqrt(d.size) / 10 || 4.5; })
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.style("fill", color)
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.on("click", click)
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.call(force.drag);
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// Exit any old nodes.
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node.exit().remove();
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// Re-select for update.
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link = vis.selectAll("line.link");
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node = vis.selectAll("circle.node");
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force.on("tick", function() {
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link.attr("x1", function(d) { return d.source.x; })
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.attr("y1", function(d) { return d.source.y; })
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.attr("x2", function(d) { return d.target.x; })
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.attr("y2", function(d) { return d.target.y; });
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node.attr("cx", function(d) { return d.x; })
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.attr("cy", function(d) { return d.y; });
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});
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}
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// Color leaf nodes orange, and packages white or blue.
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function color(d) {
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return d._children ? "#3182bd" : d.children ? "#c6dbef" : "#fd8d3c";
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}
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// Toggle children on click.
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function click(d) {
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if (d.children) {
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d._children = d.children;
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d.children = null;
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} else {
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d.children = d._children;
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d._children = null;
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}
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update();
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}
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// Returns a list of all nodes under the root.
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function flatten(root) {
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var nodes = [], i = 0;
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function recurse(node) {
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if (node.children) node.children.forEach(recurse);
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if (!node.id) node.id = ++i;
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nodes.push(node);
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}
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recurse(root);
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return nodes;
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}
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</script>
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</body>
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</html>
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