Simple d3 v4 Pie Chart with mouse interactions.
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March 10, 2017 20:07
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Pie Chart with Mouse Interactions
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| id | var | |
|---|---|---|
| A | 2704659 | |
| B | 4499890 | |
| C | 2159981 | |
| D | 3853788 | |
| E | 14106543 | |
| F | 8819342 | |
| G | 612463 |
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| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="utf-8"> | |
| <title>Pie Chart</title> | |
| <script type="text/javascript" src="http://d3js.org/d3.v4.min.js"></script> | |
| <link rel="stylesheet" type="text/css" href="style.css"> | |
| </head> | |
| <body> | |
| <script type="text/javascript" src="script.js"></script> | |
| </body> | |
| </html> |
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| // Width, Height, Margin and Padding | |
| var width = 960, | |
| height = 500; | |
| var outerRadius = height/2 - 50, | |
| innerRadius = outerRadius/2, | |
| radius = Math.min(width, height) / 2; | |
| var color = d3.scaleOrdinal(d3.schemeCategory10); | |
| var arc = d3.arc() | |
| .outerRadius(outerRadius) | |
| .innerRadius(innerRadius); | |
| var outerArc = d3.arc() | |
| .outerRadius(outerRadius*1.1) | |
| .innerRadius(outerRadius*1.1); | |
| var labelArc = d3.arc() | |
| .outerRadius(outerRadius - 40) | |
| .innerRadius(outerRadius - 40); | |
| var arcOpacity = 0.8; | |
| var pie = d3.pie().padAngle(.01); | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", width) | |
| .attr("height", height) | |
| .append("g") | |
| .attr("transform", "translate(" + width/2 + "," + height/2 + ")"); | |
| var div = d3.select("body").append("div").attr("class", "toolTip"); | |
| // Data | |
| d3.csv("data.csv", function(d){ | |
| d.var = +d.var; | |
| return d; | |
| }, function(error, data) { | |
| if (error) throw error; | |
| pie.value(function(d) { return d.var; }); | |
| // Compute angles | |
| function midAngle(d){ | |
| return d.startAngle + (d.endAngle - d.startAngle)/2; | |
| } | |
| // Create arcs | |
| var g = svg.selectAll("arc") | |
| .data(pie(data)).enter().append("g") | |
| .attr("class", "arc"); | |
| // Add forms | |
| g.append("path") | |
| .attr("d", arc) | |
| .style("fill", function(d) { return color(d.data.id); }) | |
| .style("opacity", arcOpacity) | |
| .attr("class", function(d) { return "path_" + d.data.id } ); | |
| // Add labels | |
| g.append("text") | |
| .attr("transform", function(d) { return "translate(" + labelArc.centroid(d) + ")"; }) | |
| .text(function(d) { return d.data.id;}) | |
| .style("fill", "#fff"); | |
| // Add pie lines | |
| var polyline = g.append("polyline") | |
| .attr("class", "lines") | |
| .data(pie(data), function(d){ return d.data.id }) | |
| .attr("fill", "none") | |
| .attr("stroke", "#000") | |
| .attr("opacity", .5); | |
| polyline.transition() | |
| .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 [labelArc.centroid(d2), outerArc.centroid(d2), pos]; | |
| } | |
| }); | |
| var polytext = g.append("text") | |
| .attr("class", "polytext") | |
| .text(function(d) { return d.data.id; }) | |
| .style("fill", "#000"); | |
| polytext.transition() | |
| .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(function(d) { | |
| return (d.data.id +": "+ d.data.var); | |
| }); | |
| // Mouse interactions | |
| svg.selectAll("path") | |
| .on("mousemove", function(d) { | |
| // Arcs color and radius | |
| d3.selectAll(".path_" + d.data.id) | |
| .transition().attr("d", arc.outerRadius(outerRadius*1.05)) | |
| .transition().style("opacity", 1); | |
| // Tooltip | |
| div.style("left", d3.event.pageX+10+"px"); | |
| div.style("top", d3.event.pageY-25+"px"); | |
| div.style("display", "inline-block"); | |
| div.html((d.data.id)+"<br>"+(d.data.var)); | |
| }) | |
| .on("mouseout", function(d) { | |
| // Arcs color and radius | |
| d3.selectAll(".path_" + d.data.id) | |
| .style("opacity", arcOpacity) | |
| .transition().attr("d", arc.outerRadius(outerRadius)); | |
| //.transition().style("fill", function(d) { return color(d.data.id); }) | |
| // Tooltip | |
| div.style("display", "none"); | |
| }); | |
| }); |
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| .toolTip { | |
| font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; | |
| position: absolute; | |
| display: none; | |
| width: auto; | |
| height: auto; | |
| background: none repeat scroll 0 0 white; | |
| border: 0 none; | |
| border-radius: 8px 8px 8px 8px; | |
| box-shadow: -3px 3px 15px #888888; | |
| color: black; | |
| font: 12px sans-serif; | |
| padding: 5px; | |
| text-align: center; | |
| } | |
| text { | |
| font: 12px sans-serif; | |
| } |
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