136 lines
4 KiB
JavaScript
136 lines
4 KiB
JavaScript
var m = [20, 120, 20, 120],
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w = 1280 - m[1] - m[3],
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h = 800 - m[0] - m[2],
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i = 0,
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root;
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var tree = d3.layout.tree()
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.size([h, w]);
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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("#body").append("svg:svg")
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.attr("width", w + m[1] + m[3])
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.attr("height", h + m[0] + m[2])
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.append("svg:g")
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.attr("transform", "translate(" + m[3] + "," + m[0] + ")");
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d3.json("madrid-destino.json", function(json) {
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root = json;
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root.x0 = h / 2;
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root.y0 = 0;
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function toggleAll(d) {
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if (d.children) {
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d.children.forEach(toggleAll);
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toggle(d);
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}
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}
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// Initialize the display to show a few nodes.
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root.children.forEach(toggleAll);
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update(root);
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});
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function update(source) {
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var duration = d3.event && d3.event.altKey ? 5000 : 500;
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// Compute the new tree layout.
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var nodes = tree.nodes(root).reverse();
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// Normalize for fixed-depth.
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nodes.forEach(function(d) { d.y = d.depth * 180; });
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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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// Enter any new nodes at the parent's previous position.
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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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.on("click", function(d) { toggle(d); update(d); });
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nodeEnter.append("svg:circle")
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.attr("r", 1e-6)
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.style("fill", function(d) { return d._children ? "lightsteelblue" : "#fff"; });
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nodeEnter.append("svg:text")
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.attr("x", function(d) { return d.children || d._children ? -10 : 10; })
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.attr("dy", ".35em")
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.attr("text-anchor", function(d) { return d.children || d._children ? "end" : "start"; })
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.text(function(d) { return d.name; })
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.style("fill-opacity", 1e-6);
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// Transition nodes to their new position.
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var nodeUpdate = 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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nodeUpdate.select("circle")
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.attr("r", 4.5)
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.style("fill", function(d) { return d._children ? "lightsteelblue" : "#fff"; });
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nodeUpdate.select("text")
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.style("fill-opacity", 1);
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// Transition exiting nodes to the parent's new position.
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var nodeExit = 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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.remove();
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nodeExit.select("circle")
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.attr("r", 1e-6);
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nodeExit.select("text")
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.style("fill-opacity", 1e-6);
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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.
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function toggle(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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}
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