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298 lines
8.1 KiB
298 lines
8.1 KiB
/* ------------------------------------------------------------------------------ |
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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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