This variation of a donut chart demonstrates how to add labels with lines. Clicking on the button changes the displayed data. Check Pie Chart with Labels and Missing Data to see how to handle transitions with missing/new data.
Last active
March 15, 2024 04:40
-
-
Save dbuezas/9306799 to your computer and use it in GitHub Desktop.
Pie charts labels
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| body { | |
| font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; | |
| width: 960px; | |
| height: 500px; | |
| position: relative; | |
| } | |
| svg { | |
| width: 100%; | |
| height: 100%; | |
| } | |
| path.slice{ | |
| stroke-width:2px; | |
| } | |
| polyline{ | |
| opacity: .3; | |
| stroke: black; | |
| stroke-width: 2px; | |
| fill: none; | |
| } | |
| </style> | |
| <body> | |
| <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.ordinal() | |
| .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() } | |
| }); | |
| } | |
| change(randomData()); | |
| d3.select(".randomize") | |
| .on("click", function(){ | |
| change(randomData()); | |
| }); | |
| function change(data) { | |
| /* ------- PIE SLICES -------*/ | |
| var slice = svg.select(".slices").selectAll("path.slice") | |
| .data(pie(data), key); | |
| slice.enter() | |
| .insert("path") | |
| .style("fill", function(d) { return color(d.data.label); }) | |
| .attr("class", "slice"); | |
| slice | |
| .transition().duration(1000) | |
| .attrTween("d", function(d) { | |
| this._current = this._current || d; | |
| var interpolate = d3.interpolate(this._current, d); | |
| this._current = interpolate(0); | |
| return function(t) { | |
| return arc(interpolate(t)); | |
| }; | |
| }) | |
| slice.exit() | |
| .remove(); | |
| /* ------- TEXT LABELS -------*/ | |
| var text = svg.select(".labels").selectAll("text") | |
| .data(pie(data), key); | |
| text.enter() | |
| .append("text") | |
| .attr("dy", ".35em") | |
| .text(function(d) { | |
| return d.data.label; | |
| }); | |
| function midAngle(d){ | |
| return d.startAngle + (d.endAngle - d.startAngle)/2; | |
| } | |
| text.transition().duration(1000) | |
| .attrTween("transform", function(d) { | |
| this._current = this._current || d; | |
| var interpolate = d3.interpolate(this._current, d); | |
| this._current = interpolate(0); | |
| return function(t) { | |
| var d2 = interpolate(t); | |
| var pos = outerArc.centroid(d2); | |
| pos[0] = radius * (midAngle(d2) < Math.PI ? 1 : -1); | |
| return "translate("+ pos +")"; | |
| }; | |
| }) | |
| .styleTween("text-anchor", function(d){ | |
| this._current = this._current || d; | |
| var interpolate = d3.interpolate(this._current, d); | |
| this._current = interpolate(0); | |
| return function(t) { | |
| var d2 = interpolate(t); | |
| return midAngle(d2) < Math.PI ? "start":"end"; | |
| }; | |
| }); | |
| text.exit() | |
| .remove(); | |
| /* ------- SLICE TO TEXT POLYLINES -------*/ | |
| var polyline = svg.select(".lines").selectAll("polyline") | |
| .data(pie(data), key); | |
| polyline.enter() | |
| .append("polyline"); | |
| polyline.transition().duration(1000) | |
| .attrTween("points", function(d){ | |
| this._current = this._current || d; | |
| var interpolate = d3.interpolate(this._current, d); | |
| this._current = interpolate(0); | |
| return function(t) { | |
| var d2 = interpolate(t); | |
| 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.exit() | |
| .remove(); | |
| }; | |
| </script> | |
| </body> |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
It looks like the arc radius starts as zero. I suggest you make your changes one by one and find which one is problematic