| [76] | 1 | <!DOCTYPE html> |
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| 2 | <html> |
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| 3 | <head> |
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| 4 | <meta http-equiv="Content-Type" content="text/html;charset=utf-8"> |
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| 5 | <title>Node-Link Tree</title> |
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| 6 | <script type="text/javascript" src="../../d3.js"></script> |
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| 7 | <script type="text/javascript" src="../../d3.layout.js"></script> |
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| 8 | <style type="text/css"> |
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| 9 | |
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| 10 | .node { |
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| 11 | stroke: #fff; |
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| 12 | stroke-width: 2px; |
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| 13 | } |
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| 14 | |
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| 15 | .link { |
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| 16 | fill: none; |
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| 17 | stroke: #000; |
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| 18 | } |
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| 19 | |
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| 20 | </style> |
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| 21 | </head> |
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| 22 | <body> |
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| 23 | <script type="text/javascript"> |
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| 24 | |
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| 25 | var w = 960, |
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| 26 | h = 500, |
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| 27 | root = {}, |
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| 28 | data = [root], |
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| 29 | tree = d3.layout.tree().size([w - 20, h - 20]), |
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| 30 | diagonal = d3.svg.diagonal(), |
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| 31 | duration = 750, |
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| 32 | timer = setInterval(update, duration); |
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| 33 | |
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| 34 | var vis = d3.select("body").append("svg:svg") |
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| 35 | .attr("width", w) |
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| 36 | .attr("height", h) |
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| 37 | .append("svg:g") |
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| 38 | .attr("transform", "translate(10, 10)"); |
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| 39 | |
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| 40 | vis.selectAll("circle") |
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| 41 | .data(tree(root)) |
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| 42 | .enter().append("svg:circle") |
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| 43 | .attr("class", "node") |
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| 44 | .attr("r", 3.5) |
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| 45 | .attr("cx", x) |
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| 46 | .attr("cy", y); |
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| 47 | |
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| 48 | function update() { |
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| 49 | if (data.length >= 500) return clearInterval(timer); |
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| 50 | |
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| 51 | // Add a new datum to a random parent. |
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| 52 | var d = {id: data.length}, parent = data[~~(Math.random() * data.length)]; |
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| 53 | if (parent.children) parent.children.push(d); else parent.children = [d]; |
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| 54 | data.push(d); |
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| 55 | |
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| 56 | // Compute the new tree layout. We'll stash the old layout in the data. |
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| 57 | var nodes = tree.nodes(root); |
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| 58 | |
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| 59 | // Update the nodes⊠|
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| 60 | var node = vis.selectAll("circle.node") |
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| 61 | .data(nodes, function(d) { return d.id; }); |
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| 62 | |
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| 63 | // Enter any new nodes at the parent's previous position. |
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| 64 | node.enter().append("svg:circle") |
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| 65 | .attr("class", "node") |
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| 66 | .attr("r", 3.5) |
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| 67 | .attr("cx", function(d) { return d.parent.x0; }) |
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| 68 | .attr("cy", function(d) { return d.parent.y0; }) |
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| 69 | .transition() |
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| 70 | .duration(duration) |
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| 71 | .attr("cx", x) |
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| 72 | .attr("cy", y); |
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| 73 | |
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| 74 | // Transition nodes to their new position. |
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| 75 | node.transition() |
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| 76 | .duration(duration) |
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| 77 | .attr("cx", x) |
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| 78 | .attr("cy", y); |
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| 79 | |
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| 80 | // Update the links⊠|
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| 81 | var link = vis.selectAll("path.link") |
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| 82 | .data(tree.links(nodes), function(d) { return d.target.id; }); |
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| 83 | |
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| 84 | // Enter any new links at the parent's previous position. |
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| 85 | link.enter().insert("svg:path", "circle") |
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| 86 | .attr("class", "link") |
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| 87 | .attr("d", function(d) { |
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| 88 | var o = {x: d.source.x0, y: d.source.y0}; |
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| 89 | return diagonal({source: o, target: o}); |
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| 90 | }) |
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| 91 | .transition() |
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| 92 | .duration(duration) |
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| 93 | .attr("d", diagonal); |
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| 94 | |
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| 95 | // Transition links to their new position. |
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| 96 | link.transition() |
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| 97 | .duration(duration) |
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| 98 | .attr("d", diagonal); |
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| 99 | } |
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| 100 | |
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| 101 | function x(d) { |
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| 102 | return d.x0 = d.x; |
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| 103 | } |
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| 104 | |
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| 105 | function y(d) { |
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| 106 | return d.y0 = d.y; |
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| 107 | } |
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| 108 | |
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| 109 | </script> |
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| 110 | </body> |
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| 111 | </html> |
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