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<!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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<script type="text/javascript" src="d3.v2.js"></script> |
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<script src="http://d3js.org/d3.v2.js"></script> |
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<style type="text/css"> |
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/*(_Acknowledgment: Much of the code used here was written originally by Mike Bostocks and can be seen here http://bl.ocks.org/mbostock_)*/ |
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.node rect { |
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cursor: pointer; |
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fill: #fff; |
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fill-opacity: .5; |
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stroke: #3182bd; |
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stroke-width: 1.5px; |
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} |
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.node text { |
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font: 10px sans-serif; |
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pointer-events: none; |
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} |
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path.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 = 800, |
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i = 0, |
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barHeight = 20, |
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barWidth = w * .8, |
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duration = 400, |
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root; |
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var tree = d3.layout.tree() |
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.size([h, 100]); |
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var diagonal = d3.svg.diagonal() |
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.projection(function(d) { return [d.y, d.x]; }); |
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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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.append("svg:g") |
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.attr("transform", "translate(20,30)"); |
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d3.json("CourseStructure.json", function(json) { |
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json.x0 = 0; |
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json.y0 = 0; |
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update(root = json); |
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}); |
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function update(source) { |
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// Compute the flattened node list. TODO use d3.layout.hierarchy. |
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var nodes = tree.nodes(root); |
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// Compute the "layout". |
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nodes.forEach(function(n, i) { |
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n.x = i * barHeight; |
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}); |
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// Update the nodes… |
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var node = vis.selectAll("g.node") |
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.data(nodes, function(d) { return d.id || (d.id = ++i); }); |
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var nodeEnter = node.enter().append("svg:g") |
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.attr("class", "node") |
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.attr("transform", function(d) { return "translate(" + source.y0 + "," + source.x0 + ")"; }) |
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.style("opacity", 1e-6); |
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// Enter any new nodes at the parent's previous position. |
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nodeEnter.append("svg:rect") |
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.attr("y", -barHeight / 2) |
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.attr("height", barHeight) |
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.attr("width", barWidth) |
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.style("fill", color) |
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.on("click", click); |
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nodeEnter.append("svg:text") |
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.attr("dy", 3.5) |
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.attr("dx", 5.5) |
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.text(function(d) { return d.name; }); |
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// Transition nodes to their new position. |
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nodeEnter.transition() |
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.duration(duration) |
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.attr("transform", function(d) { return "translate(" + d.y + "," + d.x + ")"; }) |
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.style("opacity", 1); |
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node.transition() |
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.duration(duration) |
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.attr("transform", function(d) { return "translate(" + d.y + "," + d.x + ")"; }) |
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.style("opacity", 1) |
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.select("rect") |
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.style("fill", color); |
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// Transition exiting nodes to the parent's new position. |
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node.exit().transition() |
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.duration(duration) |
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.attr("transform", function(d) { return "translate(" + source.y + "," + source.x + ")"; }) |
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.style("opacity", 1e-6) |
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.remove(); |
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// Update the links… |
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var link = vis.selectAll("path.link") |
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.data(tree.links(nodes), function(d) { return d.target.id; }); |
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// Enter any new links at the parent's previous position. |
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link.enter().insert("svg:path", "g") |
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.attr("class", "link") |
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.attr("d", function(d) { |
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var o = {x: source.x0, y: source.y0}; |
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return diagonal({source: o, target: o}); |
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}) |
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.transition() |
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.duration(duration) |
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.attr("d", diagonal); |
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// Transition links to their new position. |
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link.transition() |
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.duration(duration) |
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.attr("d", diagonal); |
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// Transition exiting nodes to the parent's new position. |
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link.exit().transition() |
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.duration(duration) |
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.attr("d", function(d) { |
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var o = {x: source.x, y: source.y}; |
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return diagonal({source: o, target: o}); |
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}) |
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.remove(); |
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// Stash the old positions for transition. |
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nodes.forEach(function(d) { |
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d.x0 = d.x; |
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d.y0 = d.y; |
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}); |
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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(d); |
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} |
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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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</script> |
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</body> |
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</html> |
