119 строки
2.6 KiB
HTML
119 строки
2.6 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<title>Force-Directed Layout (Dynamic)</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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rect {
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fill: #fff;
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}
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.node {
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fill: #000;
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}
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.cursor {
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fill: none;
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stroke: brown;
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pointer-events: none;
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}
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.link {
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stroke: #999;
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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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fill = d3.scale.category20(),
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nodes = [],
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links = [];
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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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vis.append("svg:rect")
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.attr("width", w)
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.attr("height", h);
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var force = d3.layout.force()
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.distance(30)
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.nodes(nodes)
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.links(links)
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.size([w, h]);
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var cursor = vis.append("svg:circle")
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.attr("r", 30)
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.attr("transform", "translate(-100,-100)")
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.attr("class", "cursor");
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force.on("tick", function() {
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vis.selectAll("line.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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vis.selectAll("circle.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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});
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vis.on("mousemove", function() {
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cursor.attr("transform", "translate(" + d3.svg.mouse(this) + ")");
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});
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vis.on("mousedown", function() {
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var point = d3.svg.mouse(this),
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node = {x: point[0], y: point[1]},
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n = nodes.push(node);
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// add links to any nearby nodes
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nodes.forEach(function(target) {
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var x = target.x - node.x,
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y = target.y - node.y;
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if (Math.sqrt(x * x + y * y) < 30) {
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links.push({source: node, target: target});
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}
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});
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restart();
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});
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restart();
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function restart() {
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force.start();
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vis.selectAll("line.link")
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.data(links)
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.enter().insert("svg:line", "circle.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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vis.selectAll("circle.node")
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.data(nodes)
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.enter().insert("svg:circle", "circle.cursor")
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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", 4.5)
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.call(force.drag);
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}
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</script>
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</body>
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</html>
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