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Example from the talk given by Kent English:
Last active
March 6, 2016 20:38
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Pie Chart Example
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| <!DOCTYPE html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script> | |
| <link rel="stylesheet" type="text/css" href="styles.css"> | |
| </head> | |
| <body> | |
| <div id="chart"></div> | |
| <p>Click on the legend to filter</p> | |
| <script> | |
| var tooltip = d3.select('#chart') | |
| .append('div') | |
| .attr('class', 'tooltip'); | |
| tooltip.append('div') | |
| .attr('class', 'label'); | |
| tooltip.append('div') | |
| .attr('class', 'count'); | |
| tooltip.append('div') | |
| .attr('class', 'percent'); | |
| d3.csv('weekdays.csv', function(error, dataset) { | |
| dataset.forEach(function(d) { | |
| d.count = +d.count; | |
| d.enabled = true; | |
| }); | |
| var pie = d3.layout.pie() | |
| .value(function(d) { | |
| return d.count; | |
| }) | |
| .sort(null); | |
| var path = svg.selectAll('path') | |
| .data(pie(dataset)) | |
| .enter() | |
| .append('path') | |
| .attr('d', arc) | |
| .attr('fill', function(d, i) { | |
| return color(d.data.label); | |
| }) | |
| .each(function(d) { | |
| this._current = d; | |
| }); | |
| var legendRectSize = 18; | |
| var legendSpacing = 4; | |
| var legend = svg.selectAll('.legend') | |
| .data(color.domain()) | |
| .enter() | |
| .append('g') | |
| .attr('class', 'legend') | |
| .attr('transform', function(d, i) { | |
| var height = legendRectSize + legendSpacing; | |
| var offset = height * color.domain().length / 2; | |
| var horz = -2 * legendRectSize; | |
| var vert = i * height - offset; | |
| return 'translate(' + horz + ',' + vert + ')'; | |
| }); | |
| legend.append('rect') | |
| .attr('width', legendRectSize) | |
| .attr('height', legendRectSize) | |
| .style('fill', color) | |
| .style('stroke', color) | |
| .on('click', function(label) { | |
| var rect = d3.select(this); | |
| var enabled = true; | |
| var totalEnabled = d3.sum(dataset.map(function(d) { | |
| return (d.enabled) ? 1 : 0; | |
| })); | |
| if (rect.attr('class') === 'disabled') { | |
| rect.attr('class', ''); | |
| } else { | |
| if (totalEnabled < 2) return; | |
| rect.attr('class', 'disabled'); | |
| enabled = false; | |
| } | |
| pie.value(function(d) { | |
| if (d.label === label) d.enabled = enabled; | |
| return (d.enabled) ? d.count : 0; | |
| }); | |
| path = path.data(pie(dataset)); | |
| path.transition() | |
| .duration(750) | |
| .attrTween('d', function(d) { | |
| var interpolate = d3.interpolate(this._current, d); | |
| this._current = interpolate(0); | |
| return function(t) { | |
| return arc(interpolate(t)); | |
| }; | |
| }); | |
| }); | |
| legend.append('text') | |
| .attr('x', legendRectSize + legendSpacing) | |
| .attr('y', legendRectSize - legendSpacing) | |
| .text(function(d) { | |
| return d; | |
| }); | |
| path.on('mouseover', function(d) { | |
| var total = d3.sum(dataset.map(function(d) { | |
| return (d.enabled) ? d.count : 0; | |
| })); | |
| var percent = Math.round(1000 * d.data.count / total) / 10; | |
| tooltip.select('.label').html(d.data.label); | |
| tooltip.select('.count').html(d.data.count); | |
| tooltip.select('.percent').html(percent + '%'); | |
| tooltip.style('display', 'block'); | |
| }); | |
| path.on('mouseout', function() { | |
| tooltip.style('display', 'none'); | |
| }); | |
| path.on('mousemove', function(d) { | |
| tooltip.style('top', (d3.event.pageY + 10) + 'px') | |
| .style('left', (d3.event.pageX + 10) + 'px'); | |
| }); | |
| }); | |
| var width = 360; | |
| var height = 360; | |
| var radius = Math.min(width, height) / 2; | |
| var color = d3.scale.category20b(); | |
| var svg = d3.select('#chart') | |
| .append('svg') | |
| .attr('width', width) | |
| .attr('height', height) | |
| .append('g') | |
| .attr('transform', 'translate(' + | |
| (width / 2) + ',' + (height / 2) + ')'); | |
| var donutWidth = 75; | |
| var arc = d3.svg.arc() | |
| .innerRadius(radius - donutWidth) // NEW | |
| .outerRadius(radius); | |
| </script> | |
| </body> |
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| body { | |
| margin:0; | |
| position:fixed; | |
| top:0; | |
| right:0; | |
| bottom:0; | |
| left:0; | |
| } | |
| svg { | |
| width:100%; | |
| height: 100% | |
| } | |
| .legend { | |
| font-size: 12px; | |
| } | |
| rect { | |
| cursor: pointer; | |
| stroke-width: 2; | |
| } | |
| rect.disabled { | |
| fill: transparent !important; | |
| } | |
| #chart { | |
| height: 360px; | |
| position: relative; | |
| width: 360px; | |
| } | |
| .tooltip { | |
| background: #eee; | |
| box-shadow: 0 0 5px #999999; | |
| color: #333; | |
| display: none; | |
| font-size: 12px; | |
| left: 130px; | |
| padding: 10px; | |
| position: absolute; | |
| text-align: center; | |
| top: 95px; | |
| width: 80px; | |
| z-index: 10; | |
| } |
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| label | count | |
|---|---|---|
| Monday | 379130 | |
| Tuesday | 424923 | |
| Wednesday | 430728 | |
| Thursday | 432138 | |
| Friday | 428295 | |
| Saturday | 368239 | |
| Sunday | 282701 |
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