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299 lines
8.1 KiB
299 lines
8.1 KiB
3 years ago
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/* ------------------------------------------------------------------------------
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*
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* # D3.js - chord animations
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*
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* Demo chord diagram setup with ticks, labels and arcs animation
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*
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* Version: 1.0
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* Latest update: August 1, 2015
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*
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* ---------------------------------------------------------------------------- */
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$(function () {
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// Basic setup
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// ------------------------------
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// Data set
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var data = [
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[6,32,47,81,31,89,24,68,50,39],
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[37,83,57,80,87,7,85,7,68,17],
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[50,15,31,3,1,85,36,95,83,99],
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[77,2,87,41,93,52,6,42,11,76],
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[91,56,97,65,23,60,63,68,45,48],
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[97,50,79,52,85,31,85,21,79,44],
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[17,77,96,22,87,98,58,15,36,16],
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[44,54,60,69,36,44,76,58,50,16]
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];
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// Construct layout
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// ------------------------------
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d3.chart = d3.chart || {};
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d3.chart.chord = function(container) {
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// Main variables
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var self = {},
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svg;
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// Layout variables
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var w = 400,
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h = 400,
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r0 = Math.min(w, h) * .37,
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r1 = r0 * 1.1;
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// Colors
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var fill = d3.scale.category20();
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// Construct chart layout
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// ------------------------------
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// Chord layout
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var chord = d3.layout.chord()
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.padding(.05)
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.sortSubgroups(d3.descending);
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// Arc
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var arc_svg = d3.svg.arc()
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.innerRadius(r0)
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.outerRadius(r1);
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// Chord
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var chord_svg = d3.svg.chord().radius(r0);
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// Setup chart
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// ------------------------------
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// Update chart
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self.update = function(data) {
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if (!chord.matrix()) {
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chord.matrix(data);
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self.render();
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} else {
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var old = {
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groups: chord.groups(),
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chords: chord.chords()
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};
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chord.matrix(data);
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self.transition(old);
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}
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};
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// Clear chart
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self.clear = function() {
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d3.select(container).selectAll('svg').remove();
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};
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// Transitions
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self.transition = function(old) {
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// Animate ticks
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svg.selectAll(".d3-chord-ticks")
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.transition()
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.duration(200)
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.attr("opacity", 0);
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// Animate arc
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svg.selectAll(".d3-arc")
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.data(chord.groups)
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.transition()
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.duration(1500)
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.attrTween("d", arcTween(arc_svg, old));
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// Animate chord
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svg.selectAll(".d3-chord")
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.selectAll("path")
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.data(chord.chords)
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.transition()
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.duration(1500)
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.attrTween("d", chordTween(chord_svg, old));
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setTimeout(self.drawTicks, 1100);
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};
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// Render chart
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self.render = function() {
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self.clear();
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// Create chart
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svg = d3.select(container).append("svg")
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.attr("width", w)
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.attr("height", h)
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.append("g")
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.attr("transform", "translate(" + w / 2 + "," + h / 2 + ")");
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// Add arc
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svg.append("g")
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.selectAll(".d3-arc")
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.data(chord.groups)
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.enter()
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.append("path")
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.attr("class", "d3-arc")
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.attr("d", arc_svg)
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.style("fill", function(d) { return fill(d.index); })
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.style("stroke", function(d) { return fill(d.index); })
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.on("mouseover", fade(.1, svg))
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.on("mouseout", fade(1, svg));
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// Add chord
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svg.append("g")
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.attr("class", "d3-chord")
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.selectAll("path")
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.data(chord.chords)
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.enter()
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.append("path")
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.style("fill", function(d) { return fill(d.target.index); })
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.attr("d", chord_svg)
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.style("stroke", "#000")
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.style("stroke-width", 0.5)
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.style("fill-opacity", 0.7)
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// Draw ticks
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self.drawTicks();
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};
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// Draw ticks
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self.drawTicks = function() {
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// Remove on load
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svg.selectAll(".d3-chord-ticks").remove();
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// Append ticks
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var ticks = svg.append("g")
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.attr("class", "d3-chord-ticks")
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.attr("opacity", 0.1)
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.selectAll("g")
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.data(chord.groups)
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.enter()
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.append("g")
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.selectAll("g")
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.data(groupTicks)
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.enter()
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.append("g")
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.attr("transform", function(d) {
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return "rotate(" + (d.angle * 180 / Math.PI - 90) + ")"
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+ "translate(" + r1 + ",0)";
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});
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// Add line
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ticks.append("line")
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.attr("x1", 1)
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.attr("y1", 0)
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.attr("x2", 5)
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.attr("y2", 0)
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.style("stroke", "#000");
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// Add text labels
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ticks.append("text")
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.attr("x", 8)
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.attr("dy", ".35em")
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.attr("text-anchor", function(d) {
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return d.angle > Math.PI ? "end" : null;
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})
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.attr("transform", function(d) {
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return d.angle > Math.PI ? "rotate(180)translate(-16)" : null;
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})
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.style("font-size", 12)
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.text(function(d) { return d.label; });
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// Transitions
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svg.selectAll(".d3-chord-ticks").transition()
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.duration(340)
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.attr("opacity", 1);
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};
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return self;
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};
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// Utility functions
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// Returns an array of tick angles and labels, given a group
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function groupTicks(d) {
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var k = (d.endAngle - d.startAngle) / d.value;
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return d3.range(0, d.value, 50).map(function(v, i) {
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return {
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angle: v * k + d.startAngle,
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label: i % 2 ? null : v
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};
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});
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}
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// Returns an event handler for fading a given chord group
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function fade(opacity, svg) {
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return function(g, i) {
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svg.selectAll(".d3-chord path")
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.filter(function(d) {
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return d.source.index != i && d.target.index != i;
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})
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.transition()
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.style("opacity", opacity);
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};
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}
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// Interpolate the arcs
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function arcTween(arc_svg, old) {
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return function(d,i) {
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var i = d3.interpolate(old.groups[i], d);
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return function(t) {
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return arc_svg(i(t));
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}
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}
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}
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// Interpolate the chords
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function chordTween(chord_svg, old) {
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return function(d,i) {
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var i = d3.interpolate(old.chords[i], d);
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return function(t) {
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return chord_svg(i(t));
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}
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}
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}
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// Random data
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function random_matrix(size) {
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var matrix = [];
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for (var i=0; i<size; i++) {
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var row = [];
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for (var j=0; j<size; j++) {
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var num = Math.round(100*Math.pow(Math.random(),2)+1);
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row.push(num);
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}
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matrix.push(row);
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}
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return matrix;
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};
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// Initialize chart
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// ------------------------------
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initChord();
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function initChord() {
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var chord = d3.chart.chord("#d3-chord-tweens");
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chord.update(data);
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d3.select("#update-tween").on("click", function() {
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var data = random_matrix(8);
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chord.update(data);
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});
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d3.select("#clear-tween").on("click", function() {
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chord.clear();
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});
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d3.select("#render-tween").on("click", function() {
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chord.render();
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});
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}
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});
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