This variation of a donut chart demonstrates how to add labels with lines and also works with missing/new data. Clicking on the button changes the displayed data.
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| body { | |
| font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; | |
| width: 960px; | |
| height: 500px; | |
| position: relative; | |
| } | |
| path.slice{ | |
| stroke-width:2px; | |
| } | |
| polyline{ | |
| opacity: .3; | |
| stroke: black; | |
| stroke-width: 2px; | |
| fill: none; | |
| } | |
| </style> | |
| <body> | |
| Duration: 0<input type="range" id="duration" min="0" max="5000">5000 | |
| <br> | |
| <button class="randomize">randomize</button> | |
| <script src="http://d3js.org/d3.v3.min.js"></script> | |
| <script> | |
| var svg = d3.select("body") | |
| .append("svg") | |
| .append("g") | |
| svg.append("g") | |
| .attr("class", "slices"); | |
| svg.append("g") | |
| .attr("class", "labels"); | |
| svg.append("g") | |
| .attr("class", "lines"); | |
| var width = 960, | |
| height = 450, | |
| radius = Math.min(width, height) / 2; | |
| var pie = d3.layout.pie() | |
| .sort(null) | |
| .value(function(d) { | |
| return d.value; | |
| }); | |
| var arc = d3.svg.arc() | |
| .outerRadius(radius * 0.8) | |
| .innerRadius(radius * 0.4); | |
| var outerArc = d3.svg.arc() | |
| .innerRadius(radius * 0.9) | |
| .outerRadius(radius * 0.9); | |
| svg.attr("transform", "translate(" + width / 2 + "," + height / 2 + ")"); | |
| var key = function(d){ return d.data.label; }; | |
| var color = d3.scale.category20() | |
| .domain(["Lorem ipsum", "dolor sit", "amet", "consectetur", "adipisicing", "elit", "sed", "do", "eiusmod", "tempor", "incididunt"]) | |
| //.range(["#98abc5", "#8a89a6", "#7b6888", "#6b486b", "#a05d56", "#d0743c", "#ff8c00"]); | |
| function randomData (){ | |
| var labels = color.domain(); | |
| return labels.map(function(label){ | |
| return { label: label, value: Math.random() } | |
| }).filter(function() { | |
| return Math.random() > .5; | |
| }).sort(function(a,b) { | |
| return d3.ascending(a.label, b.label); | |
| }); | |
| } | |
| change(randomData()); | |
| d3.select(".randomize") | |
| .on("click", function(){ | |
| change(randomData()); | |
| }); | |
| function mergeWithFirstEqualZero(first, second){ | |
| var secondSet = d3.set(); second.forEach(function(d) { secondSet.add(d.label); }); | |
| var onlyFirst = first | |
| .filter(function(d){ return !secondSet.has(d.label) }) | |
| .map(function(d) { return {label: d.label, value: 0}; }); | |
| return d3.merge([ second, onlyFirst ]) | |
| .sort(function(a,b) { | |
| return d3.ascending(a.label, b.label); | |
| }); | |
| } | |
| function change(data) { | |
| var duration = +document.getElementById("duration").value; | |
| var data0 = svg.select(".slices").selectAll("path.slice") | |
| .data().map(function(d) { return d.data }); | |
| if (data0.length == 0) data0 = data; | |
| var was = mergeWithFirstEqualZero(data, data0); | |
| var is = mergeWithFirstEqualZero(data0, data); | |
| /* ------- SLICE ARCS -------*/ | |
| var slice = svg.select(".slices").selectAll("path.slice") | |
| .data(pie(was), key); | |
| slice.enter() | |
| .insert("path") | |
| .attr("class", "slice") | |
| .style("fill", function(d) { return color(d.data.label); }) | |
| .each(function(d) { | |
| this._current = d; | |
| }); | |
| slice = svg.select(".slices").selectAll("path.slice") | |
| .data(pie(is), key); | |
| slice | |
| .transition().duration(duration) | |
| .attrTween("d", function(d) { | |
| var interpolate = d3.interpolate(this._current, d); | |
| var _this = this; | |
| return function(t) { | |
| _this._current = interpolate(t); | |
| return arc(_this._current); | |
| }; | |
| }); | |
| slice = svg.select(".slices").selectAll("path.slice") | |
| .data(pie(data), key); | |
| slice | |
| .exit().transition().delay(duration).duration(0) | |
| .remove(); | |
| /* ------- TEXT LABELS -------*/ | |
| var text = svg.select(".labels").selectAll("text") | |
| .data(pie(was), key); | |
| text.enter() | |
| .append("text") | |
| .attr("dy", ".35em") | |
| .style("opacity", 0) | |
| .text(function(d) { | |
| return d.data.label; | |
| }) | |
| .each(function(d) { | |
| this._current = d; | |
| }); | |
| function midAngle(d){ | |
| return d.startAngle + (d.endAngle - d.startAngle)/2; | |
| } | |
| text = svg.select(".labels").selectAll("text") | |
| .data(pie(is), key); | |
| text.transition().duration(duration) | |
| .style("opacity", function(d) { | |
| return d.data.value == 0 ? 0 : 1; | |
| }) | |
| .attrTween("transform", function(d) { | |
| var interpolate = d3.interpolate(this._current, d); | |
| var _this = this; | |
| return function(t) { | |
| var d2 = interpolate(t); | |
| _this._current = d2; | |
| var pos = outerArc.centroid(d2); | |
| pos[0] = radius * (midAngle(d2) < Math.PI ? 1 : -1); | |
| return "translate("+ pos +")"; | |
| }; | |
| }) | |
| .styleTween("text-anchor", function(d){ | |
| var interpolate = d3.interpolate(this._current, d); | |
| return function(t) { | |
| var d2 = interpolate(t); | |
| return midAngle(d2) < Math.PI ? "start":"end"; | |
| }; | |
| }); | |
| text = svg.select(".labels").selectAll("text") | |
| .data(pie(data), key); | |
| text | |
| .exit().transition().delay(duration) | |
| .remove(); | |
| /* ------- SLICE TO TEXT POLYLINES -------*/ | |
| var polyline = svg.select(".lines").selectAll("polyline") | |
| .data(pie(was), key); | |
| polyline.enter() | |
| .append("polyline") | |
| .style("opacity", 0) | |
| .each(function(d) { | |
| this._current = d; | |
| }); | |
| polyline = svg.select(".lines").selectAll("polyline") | |
| .data(pie(is), key); | |
| polyline.transition().duration(duration) | |
| .style("opacity", function(d) { | |
| return d.data.value == 0 ? 0 : .5; | |
| }) | |
| .attrTween("points", function(d){ | |
| this._current = this._current; | |
| var interpolate = d3.interpolate(this._current, d); | |
| var _this = this; | |
| return function(t) { | |
| var d2 = interpolate(t); | |
| _this._current = d2; | |
| var pos = outerArc.centroid(d2); | |
| pos[0] = radius * 0.95 * (midAngle(d2) < Math.PI ? 1 : -1); | |
| return [arc.centroid(d2), outerArc.centroid(d2), pos]; | |
| }; | |
| }); | |
| polyline = svg.select(".lines").selectAll("polyline") | |
| .data(pie(data), key); | |
| polyline | |
| .exit().transition().delay(duration) | |
| .remove(); | |
| }; | |
| </script> | |
| </body> |
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