D3 Examples - Donut scale

xxxxxxxxxx
 
<style type="text/css">
  #donut-chart {                                                          /* NEW */
        height: 500px;
    margin: 0 auto;                                               /* NEW */
        position: relative;                                             /* NEW */
        width: 500px;
            }
</style>
<script src="https://d3js.org/d3.v4.min.js"></script>
<body>
<div id="dount-chart"></div>
</body> 
​
<script>
var someData = [{"year":2017,"count":42,"country":"Absurdistan"},{"year":2016,"count":244,"country":"Absurdistan"},{"year":2015,"count":209,"country":"Absurdistan"},{"year":2014,"count":210,"country":"Absurdistan"},{"year":2013,"count":221,"country":"Absurdistan"},{"year":2012,"count":202,"country":"Absurdistan"},{"year":2011,"count":165,"country":"Absurdistan"},{"year":2010,"count":107,"country":"Absurdistan"},{"year":2009,"count":92,"country":"Absurdistan"},{"year":2008,"count":46,"country":"Absurdistan"},{"year":2007,"count":39,"country":"Absurdistan"},{"year":2006,"count":20,"country":"Absurdistan"},{"year":2005,"count":20,"country":"Absurdistan"},{"year":2004,"count":11,"country":"Absurdistan"}]   
drawChart(someData);
    
function drawChart(data) {
  console.log(data);
        data.forEach(function(d) {
          d.count = +d.count;
          d.year = +d.year
          d.enabled = true;
        });
        var year = d3.set(data.map(function(d) { return d.year; }))
        var size = Object.keys(year).length;
        var width = 430;
        var height = 430;
        var radius = Math.min(width, height) / 2;
        var donutWidth = 75;
        var legendSpacing = 4;
        var legendHeight = radius * 2 - donutWidth * 2
        var legendScale = d3.scaleBand()
        .domain(year.values())
        .rangeRound([legendHeight,0])
        var legendRectSize = legendScale.bandwidth();
        console.log(legendRectSize);
        var colorScale = d3.scaleOrdinal(d3.schemeCategory20b);
        var svg = d3.select('#dount-chart')
          .append('svg')
          .attr('width', width)
          .attr('height', height)
          .append('g')
          .attr('transform', 'translate(' + (width / 2) +
            ',' + (height / 2) + ')');
        var arc = d3.arc()
          .innerRadius(radius - donutWidth)
          .outerRadius(radius);
        var pie = d3.pie()
          .value(function(d) { return d.count; })
          .sort(null);
        var tooltip = d3.select('#dount-chart')
          .append('div')
          .attr('class', 'tooltip');
        tooltip.append('div')
          .attr('class', 'year');
        tooltip.append('div')
          .attr('class', 'count');
        tooltip.append('div')
          .attr('class', 'percent');
        var path = svg.selectAll('path')
          .data(pie(data))
          .enter()
          .append('path')
          .attr('d', arc)
          .attr('fill', function(d, i) {
            return colorScale(d.data.year);
          })
          .each(function(d) { this._current = d; });
        path.on('mouseover', function(d) {
            var total = d3.sum(data.map(function(d) {
              return (d.enabled) ? d.count : 0;
            }));
            var percent = Math.round(1000 * d.data.count / total) / 10;
            tooltip.select('.year').html(d.data.year);
            tooltip.select('.count').html(d.data.count);
            tooltip.select('.percent').html(percent + '%');
            tooltip.style('display', 'block');
          });
          path.on('mouseout', function() {
            tooltip.style('display', 'none');
          });
​
          var legend = d3.select("svg").append("g")
          .attr("transform","translate(" +width/2+","   + (radius/2.3 - legendScale.bandwidth()) + ")" )
          .selectAll('.legend')
            .data(colorScale.domain())
            .enter()
            .append('g')
            .attr('class', 'legend')
            .attr('transform', function(d, i) {
              var horz = 0;
              console.log(i);
              var vert = legendScale(d);
              console.log(vert);
              return 'translate(' + horz + ',' + vert + ')';
            });
​
        legend.append('rect')
          .attr('width', legendRectSize)
          .attr('height', legendRectSize)
          .style('fill', colorScale)
          .style('stroke', colorScale)
          .on('click', function(year) {
          var rect = d3.select(this);
          var enabled = true;
          var totalEnabled = d3.sum(data.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.year === year) d.enabled = enabled;
            return (d.enabled) ? d.count : 0;
          });
          path = path.data(pie(data));
          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; });
      }
​
​
</script>
​
    