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376 lines
12 KiB
JavaScript
376 lines
12 KiB
JavaScript
var d3 = window.d3 || require('d3');
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var px = require('../javascripts/modules/caravel.js');
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var wrapSvgText = require('../javascripts/modules/utils.js').wrapSvgText;
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require('./sunburst.css');
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// Modified from http://bl.ocks.org/kerryrodden/7090426
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function sunburstVis(slice) {
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var container = d3.select(slice.selector);
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var render = function () {
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// vars with shared scope within this function
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var margin = { top: 10, right: 5, bottom: 10, left: 5 };
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var containerWidth = slice.width();
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var containerHeight = slice.height();
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var breadcrumbHeight = containerHeight * 0.085;
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var visWidth = containerWidth - margin.left - margin.right;
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var visHeight = containerHeight - margin.top - margin.bottom - breadcrumbHeight;
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var radius = Math.min(visWidth, visHeight) / 2;
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var colorByCategory = true; // color by category if primary/secondary metrics match
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var maxBreadcrumbs, breadcrumbDims, // set based on data
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totalSize, // total size of all segments; set after loading the data.
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colorScale,
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breadcrumbs, vis, arcs, gMiddleText; // dom handles
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// Helper + path gen functions
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var partition = d3.layout.partition()
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.size([2 * Math.PI, radius * radius])
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.value(function (d) { return d.m1; });
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var arc = d3.svg.arc()
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.startAngle(function (d) {
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return d.x;
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})
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.endAngle(function (d) {
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return d.x + d.dx;
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})
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.innerRadius(function (d) {
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return Math.sqrt(d.y);
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})
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.outerRadius(function (d) {
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return Math.sqrt(d.y + d.dy);
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});
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var formatNum = d3.format(".3s");
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var formatPerc = d3.format(".3p");
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container.select("svg").remove();
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var svg = container.append("svg:svg")
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.attr("width", containerWidth)
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.attr("height", containerHeight);
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d3.json(slice.jsonEndpoint(), function (error, rawData) {
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if (error !== null) {
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slice.error(error.responseText);
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return '';
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}
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createBreadcrumbs(rawData);
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createVisualization(rawData);
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slice.done(rawData);
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});
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function createBreadcrumbs(rawData) {
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var firstRowData = rawData.data[0];
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maxBreadcrumbs = (firstRowData.length - 2) + 1; // -2 bc row contains 2x metrics, +extra for %label and buffer
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breadcrumbDims = {
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width: visWidth / maxBreadcrumbs,
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height: breadcrumbHeight *0.8, // more margin
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spacing: 3,
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tipTailWidth: 10
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};
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breadcrumbs = svg.append("svg:g")
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.attr("class", "breadcrumbs")
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.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
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breadcrumbs.append("svg:text")
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.attr("class", "end-label");
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}
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// Main function to draw and set up the visualization, once we have the data.
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function createVisualization(rawData) {
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var tree = buildHierarchy(rawData.data);
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vis = svg.append("svg:g")
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.attr("class", "sunburst-vis")
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.attr("transform", "translate(" + (margin.left + (visWidth / 2)) + "," + (margin.top + breadcrumbHeight + (visHeight / 2)) + ")")
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.on("mouseleave", mouseleave);
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arcs = vis.append("svg:g")
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.attr("id", "arcs");
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gMiddleText = vis.append("svg:g")
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.attr("class", "center-label");
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// Bounding circle underneath the sunburst, to make it easier to detect
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// when the mouse leaves the parent g.
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arcs.append("svg:circle")
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.attr("r", radius)
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.style("opacity", 0);
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// For efficiency, filter nodes to keep only those large enough to see.
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var nodes = partition.nodes(tree)
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.filter(function (d) {
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return (d.dx > 0.005); // 0.005 radians = 0.29 degrees
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});
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var ext;
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if (rawData.form_data.metric !== rawData.form_data.secondary_metric) {
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colorByCategory = false;
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ext = d3.extent(nodes, function (d) {
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return d.m2 / d.m1;
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});
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colorScale = d3.scale.linear()
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.domain([ext[0], ext[0] + ((ext[1] - ext[0]) / 2), ext[1]])
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.range(["#00D1C1", "white", "#FFB400"]);
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}
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var path = arcs.data([tree]).selectAll("path")
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.data(nodes)
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.enter().append("svg:path")
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.attr("display", function (d) {
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return d.depth ? null : "none";
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})
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.attr("d", arc)
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.attr("fill-rule", "evenodd")
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.style("fill", function (d) {
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return colorByCategory ? px.color.category21(d.name) : colorScale(d.m2 / d.m1);
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})
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.style("opacity", 1)
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.on("mouseenter", mouseenter);
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// Get total size of the tree = value of root node from partition.
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totalSize = path.node().__data__.value;
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}
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// Fade all but the current sequence, and show it in the breadcrumb trail.
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function mouseenter(d) {
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var sequenceArray = getAncestors(d);
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var parentOfD = sequenceArray[sequenceArray.length - 2] || null;
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var absolutePercentage = (d.m1 / totalSize).toPrecision(3);
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var conditionalPercentage = parentOfD ? (d.m1 / parentOfD.m1).toPrecision(3) : null;
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var absolutePercString = formatPerc(absolutePercentage);
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var conditionalPercString = parentOfD ? formatPerc(conditionalPercentage) : "";
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var yOffsets = ["-25", "7", "35", "60"]; // 3 levels of text if inner-most level, 4 otherwise
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var offsetIndex = 0;
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// If metrics match, assume we are coloring by category
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var metricsMatch = Math.abs(d.m1 - d.m2) < 0.00001;
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gMiddleText.selectAll("*").remove();
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gMiddleText.append("text")
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.attr("class", "path-abs-percent")
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.attr("y", yOffsets[offsetIndex++])
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.text(absolutePercString + " of total");
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if (conditionalPercString) {
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gMiddleText.append("text")
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.attr("class", "path-cond-percent")
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.attr("y", yOffsets[offsetIndex++])
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.text(conditionalPercString + " of parent");
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}
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gMiddleText.append("text")
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.attr("class", "path-metrics")
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.attr("y", yOffsets[offsetIndex++])
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.text("m1: " + formatNum(d.m1) + (metricsMatch ? "" : ", m2: " + formatNum(d.m2)));
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gMiddleText.append("text")
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.attr("class", "path-ratio")
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.attr("y", yOffsets[offsetIndex++])
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.text((metricsMatch ? "" : ("m2/m1: " + formatPerc(d.m2 / d.m1))) );
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// Reset and fade all the segments.
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arcs.selectAll("path")
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.style("stroke-width", null)
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.style("stroke", null)
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.style("opacity", 0.7);
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// Then highlight only those that are an ancestor of the current segment.
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arcs.selectAll("path")
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.filter(function (node) {
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return (sequenceArray.indexOf(node) >= 0);
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})
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.style("opacity", 1)
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.style("stroke-width", "2px")
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.style("stroke", "#000");
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updateBreadcrumbs(sequenceArray, absolutePercString);
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}
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// Restore everything to full opacity when moving off the visualization.
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function mouseleave(d) {
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// Hide the breadcrumb trail
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breadcrumbs.style("visibility", "hidden");
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gMiddleText.selectAll("*").remove();
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// Deactivate all segments during transition.
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arcs.selectAll("path").on("mouseenter", null);
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//gMiddleText.selectAll("*").remove();
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// Transition each segment to full opacity and then reactivate it.
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arcs.selectAll("path")
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.transition()
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.duration(200)
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.style("opacity", 1)
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.style("stroke", null)
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.style("stroke-width", null)
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.each("end", function () {
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d3.select(this).on("mouseenter", mouseenter);
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});
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}
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// Given a node in a partition layout, return an array of all of its ancestor
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// nodes, highest first, but excluding the root.
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function getAncestors(node) {
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var path = [];
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var current = node;
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while (current.parent) {
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path.unshift(current);
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current = current.parent;
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}
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return path;
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}
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// Generate a string that describes the points of a breadcrumb polygon.
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function breadcrumbPoints(d, i) {
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var points = [];
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points.push("0,0");
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points.push(breadcrumbDims.width + ",0");
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points.push(breadcrumbDims.width + breadcrumbDims.tipTailWidth + "," + (breadcrumbDims.height / 2));
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points.push(breadcrumbDims.width+ "," + breadcrumbDims.height);
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points.push("0," + breadcrumbDims.height);
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if (i > 0) { // Leftmost breadcrumb; don't include 6th vertex.
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points.push(breadcrumbDims.tipTailWidth + "," + (breadcrumbDims.height / 2));
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}
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return points.join(" ");
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}
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function updateBreadcrumbs(sequenceArray, percentageString) {
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var g = breadcrumbs.selectAll("g")
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.data(sequenceArray, function (d) {
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return d.name + d.depth;
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});
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// Add breadcrumb and label for entering nodes.
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var entering = g.enter().append("svg:g");
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entering.append("svg:polygon")
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.attr("points", breadcrumbPoints)
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.style("fill", function (d) {
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return colorByCategory ? px.color.category21(d.name) : colorScale(d.m2 / d.m1);
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});
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entering.append("svg:text")
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.attr("x", (breadcrumbDims.width + breadcrumbDims.tipTailWidth) / 2)
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.attr("y", breadcrumbDims.height / 4)
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.attr("dy", "0.35em")
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.attr("class", "step-label")
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.text(function (d) { return d.name; })
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.call(wrapSvgText, breadcrumbDims.width, breadcrumbDims.height / 2);
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// Set position for entering and updating nodes.
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g.attr("transform", function (d, i) {
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return "translate(" + i * (breadcrumbDims.width + breadcrumbDims.spacing) + ", 0)";
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});
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// Remove exiting nodes.
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g.exit().remove();
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// Now move and update the percentage at the end.
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breadcrumbs.select(".end-label")
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.attr("x", (sequenceArray.length + 0.5) * (breadcrumbDims.width + breadcrumbDims.spacing))
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.attr("y", breadcrumbDims.height / 2)
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.attr("dy", "0.35em")
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.text(percentageString);
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// Make the breadcrumb trail visible, if it's hidden.
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breadcrumbs.style("visibility", null);
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}
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function buildHierarchy(rows) {
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var root = {
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name: "root",
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children: []
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};
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for (var i = 0; i < rows.length; i++) {
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var row = rows[i];
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var m1 = Number(row[row.length - 2]);
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var m2 = Number(row[row.length - 1]);
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var levels = row.slice(0, row.length - 2);
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if (isNaN(m1)) { // e.g. if this is a header row
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continue;
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}
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var currentNode = root;
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for (var j = 0; j < levels.length; j++) {
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var children = currentNode.children || [];
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var nodeName = levels[j];
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// If the next node has the name "0", it will
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var isLeafNode = (j >= levels.length - 1) || levels[j+1] === 0;
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var childNode;
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if (!isLeafNode) {
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// Not yet at the end of the sequence; move down the tree.
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var foundChild = false;
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for (var k = 0; k < children.length; k++) {
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if (children[k].name === nodeName) {
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childNode = children[k];
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foundChild = true;
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break;
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}
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}
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// If we don't already have a child node for this branch, create it.
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if (!foundChild) {
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childNode = {
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name: nodeName,
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children: []
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};
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children.push(childNode);
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}
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currentNode = childNode;
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} else if (nodeName !== 0) {
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// Reached the end of the sequence; create a leaf node.
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childNode = {
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name: nodeName,
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m1: m1,
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m2: m2
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};
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children.push(childNode);
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}
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}
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}
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function recurse(node) {
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if (node.children) {
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var sums;
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var m1 = 0;
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var m2 = 0;
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for (var i = 0; i < node.children.length; i++) {
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sums = recurse(node.children[i]);
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m1 += sums[0];
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m2 += sums[1];
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}
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node.m1 = m1;
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node.m2 = m2;
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}
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return [node.m1, node.m2];
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}
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recurse(root);
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return root;
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}
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};
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return {
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render: render,
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resize: render
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};
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}
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module.exports = sunburstVis;
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