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.
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March 15, 2024 04:40
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Pie charts labels
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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; | |
| } | |
| 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> |
I authored the code.
Let's make it MIT
Copyright David Buezas, 2023
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE
Do you mind sharing the project in which you'll use it? Im curious :)
Thank you for your message and for your willingness to license your code under the MIT License.
Unfortunately, I cannot share with you the project as it is the property of a client who has used a significant portion of the code written by you in one of their files.
Thank you for your understanding and please let me know if you have any further questions. :)
Best regards,
Andrei
Oh, I see, a client project. Well happy to hear it helped somebody :)
Hi @dbuezas,
Thank you very much for the code.
I made some small changes to make this code work in version 7:
var pie = d3.pie() //deleted layout.
var arc = d3.arc() //svg.
var outerArc = d3.arc() //.svg
var color = d3.scaleOrdinal()//.scale.ordinal()
Everything works fine except for one thing: when I first open the page (and the 'change' function is called for the first time), the graph doesn't display, and all the text collapses to the center. Do you have any thoughts on why this might be happening?
It looks like the arc radius starts as zero. I suggest you make your changes one by one and find which one is problematic
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Hello @dbuezas,
What is the license for the code above? Or if you copied it from somewhere, can you give me the source?
Thanks in advance! :)