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- <!DOCTYPE html>
- <html>
- <head>
- <title>Force-Directed Layout (Multiple Foci)</title>
- <script type="text/javascript" src="../../d3.js"></script>
- <script type="text/javascript" src="../../d3.geom.js"></script>
- <script type="text/javascript" src="../../d3.layout.js"></script>
- <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3/jquery.min.js"></script>
- </head>
- <body>
- <div id="chart"></div>
- <input type="checkbox" name="chkBox" id="chkBox"></input>
- <script type="text/javascript">
- var w = 960,
- h = 500,
- fill = d3.scale.category10(),
- nodes = d3.range(100).map(Object);
- var vis = d3.select("#chart").append("svg:svg")
- .attr("width", w)
- .attr("height", h);
- var force = d3.layout.force()
- .nodes(nodes)
- .links([])
- .size([w, h])
- .start();
- var node = vis.selectAll("circle.node")
- .data(nodes)
- .enter().append("svg:circle")
- .attr("class", "node")
- .attr("cx", function(d) { return d.x; })
- .attr("cy", function(d) { return d.y; })
- .attr("r", 8)
- .style("fill", function(d, i) { return fill(i & 3); })
- .style("stroke", function(d, i) { return d3.rgb(fill(i & 3)).darker(2); })
- .style("stroke-width", 1.5)
- .call(force.drag);
- vis.style("opacity", 1e-6)
- .transition()
- .duration(1000)
- .style("opacity", 1);
- $("#chkBox").change(function(){
- if ($(this).is(':checked')) {
- force.on("tick", tick1);
- } else {
- force.on("tick", tick2);
- }
- });
- tick1 = function(e) {
- // Push different nodes in different directions for clustering.
- var k = 6 * e.alpha;
- nodes.forEach(function(o, i) {
- o.x += i & 2 ? k : -k;
- o.y += i & 1 ? k : -k;
- });
- node.attr("cx", function(d) { return d.x; })
- .attr("cy", function(d) { return d.y; });
- };
- tick2 = function(e) {
- node.attr("cx", function(d) { return d.x; })
- .attr("cy", function(d) { return d.y; });
- };
- d3.select("body").on("click", function() {
- nodes.forEach(function(o, i) {
- o.x += (Math.random() - .5) * 40;
- o.y += (Math.random() - .5) * 40;
- });
- force.resume();
- });
- </script>
- </body>
- </html>
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