/* ------------------------------------------------------------------------------ * * # D3.js - chord animations * * Demo chord diagram setup with ticks, labels and arcs animation * * Version: 1.0 * Latest update: August 1, 2015 * * ---------------------------------------------------------------------------- */ $(function () { // Basic setup // ------------------------------ // Data set var data = [ [6,32,47,81,31,89,24,68,50,39], [37,83,57,80,87,7,85,7,68,17], [50,15,31,3,1,85,36,95,83,99], [77,2,87,41,93,52,6,42,11,76], [91,56,97,65,23,60,63,68,45,48], [97,50,79,52,85,31,85,21,79,44], [17,77,96,22,87,98,58,15,36,16], [44,54,60,69,36,44,76,58,50,16] ]; // Construct layout // ------------------------------ d3.chart = d3.chart || {}; d3.chart.chord = function(container) { // Main variables var self = {}, svg; // Layout variables var w = 400, h = 400, r0 = Math.min(w, h) * .37, r1 = r0 * 1.1; // Colors var fill = d3.scale.category20(); // Construct chart layout // ------------------------------ // Chord layout var chord = d3.layout.chord() .padding(.05) .sortSubgroups(d3.descending); // Arc var arc_svg = d3.svg.arc() .innerRadius(r0) .outerRadius(r1); // Chord var chord_svg = d3.svg.chord().radius(r0); // Setup chart // ------------------------------ // Update chart self.update = function(data) { if (!chord.matrix()) { chord.matrix(data); self.render(); } else { var old = { groups: chord.groups(), chords: chord.chords() }; chord.matrix(data); self.transition(old); } }; // Clear chart self.clear = function() { d3.select(container).selectAll('svg').remove(); }; // Transitions self.transition = function(old) { // Animate ticks svg.selectAll(".d3-chord-ticks") .transition() .duration(200) .attr("opacity", 0); // Animate arc svg.selectAll(".d3-arc") .data(chord.groups) .transition() .duration(1500) .attrTween("d", arcTween(arc_svg, old)); // Animate chord svg.selectAll(".d3-chord") .selectAll("path") .data(chord.chords) .transition() .duration(1500) .attrTween("d", chordTween(chord_svg, old)); setTimeout(self.drawTicks, 1100); }; // Render chart self.render = function() { self.clear(); // Create chart svg = d3.select(container).append("svg") .attr("width", w) .attr("height", h) .append("g") .attr("transform", "translate(" + w / 2 + "," + h / 2 + ")"); // Add arc svg.append("g") .selectAll(".d3-arc") .data(chord.groups) .enter() .append("path") .attr("class", "d3-arc") .attr("d", arc_svg) .style("fill", function(d) { return fill(d.index); }) .style("stroke", function(d) { return fill(d.index); }) .on("mouseover", fade(.1, svg)) .on("mouseout", fade(1, svg)); // Add chord svg.append("g") .attr("class", "d3-chord") .selectAll("path") .data(chord.chords) .enter() .append("path") .style("fill", function(d) { return fill(d.target.index); }) .attr("d", chord_svg) .style("stroke", "#000") .style("stroke-width", 0.5) .style("fill-opacity", 0.7) // Draw ticks self.drawTicks(); }; // Draw ticks self.drawTicks = function() { // Remove on load svg.selectAll(".d3-chord-ticks").remove(); // Append ticks var ticks = svg.append("g") .attr("class", "d3-chord-ticks") .attr("opacity", 0.1) .selectAll("g") .data(chord.groups) .enter() .append("g") .selectAll("g") .data(groupTicks) .enter() .append("g") .attr("transform", function(d) { return "rotate(" + (d.angle * 180 / Math.PI - 90) + ")" + "translate(" + r1 + ",0)"; }); // Add line ticks.append("line") .attr("x1", 1) .attr("y1", 0) .attr("x2", 5) .attr("y2", 0) .style("stroke", "#000"); // Add text labels ticks.append("text") .attr("x", 8) .attr("dy", ".35em") .attr("text-anchor", function(d) { return d.angle > Math.PI ? "end" : null; }) .attr("transform", function(d) { return d.angle > Math.PI ? "rotate(180)translate(-16)" : null; }) .style("font-size", 12) .text(function(d) { return d.label; }); // Transitions svg.selectAll(".d3-chord-ticks").transition() .duration(340) .attr("opacity", 1); }; return self; }; // Utility functions // Returns an array of tick angles and labels, given a group function groupTicks(d) { var k = (d.endAngle - d.startAngle) / d.value; return d3.range(0, d.value, 50).map(function(v, i) { return { angle: v * k + d.startAngle, label: i % 2 ? null : v }; }); } // Returns an event handler for fading a given chord group function fade(opacity, svg) { return function(g, i) { svg.selectAll(".d3-chord path") .filter(function(d) { return d.source.index != i && d.target.index != i; }) .transition() .style("opacity", opacity); }; } // Interpolate the arcs function arcTween(arc_svg, old) { return function(d,i) { var i = d3.interpolate(old.groups[i], d); return function(t) { return arc_svg(i(t)); } } } // Interpolate the chords function chordTween(chord_svg, old) { return function(d,i) { var i = d3.interpolate(old.chords[i], d); return function(t) { return chord_svg(i(t)); } } } // Random data function random_matrix(size) { var matrix = []; for (var i=0; i