D3 Examples - d3.unconf 2016, v10

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<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="https://d3js.org/d3.v4.min.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.15.0/lodash.min.js"></script>
  <script src="https://npmcdn.com/babel-core@5.8.34/browser.min.js"></script>
  <script type="text/javascript" src="https://gka.github.io/chroma.js/vendor/chroma-js/chroma.min.js"></script>
  <style> 
    body {
/*       background-color: #000; */
      font-family: courier;
      text-align: center;
    }
    h1 {
      font-size: 36px;
      width: 1000px;
      padding-top: 40px;
      
    }
    #header {
      width: 1000px;
/*       padding: 40px 0; */
      position: relative;
      margin: auto;
    }
    #legend {
      width: 580px;
      height: 600px;
      margin: auto;
    }
    #annotation {
      width: 1000px;
      position: absolute;
      top: 0;
      font-size: 20px;
    }
    #content {
      position: relative;
      width: 1000px;
      padding-bottom: 100px;
      margin: auto;
    }
    #flowers {
      width: 800px;
      height: 1000px;
      margin: auto;
    }
    #hover {
      position: absolute;
      width: 250px;
      border: 1px solid #666;
      border-radius: 5px;
      box-shadow: 0 0 5px #666;
      text-align: center;
      background-color: #fff;
      padding: 10px;
    }
  </style>
</head>
​
<body>
  <div id='header'>
    <h1>d3.unconf 2016</h1>
    <p>(Hover for attendee info ✨)</p>
    <svg id='legend'></svg>
    <div id='annotation'></svg>
  </div>
  <div id='content'>
    <svg id='flowers'></svg>
    <div id='hover'></div>
  </div>
  
  <script>
    var midpoint = -2/3;
    var halfSide = Math.sqrt(1 / 3);
    var triangle = [
      (-halfSide) + ',-1',
      (halfSide) + ',-1',
      '0,0'
    ];
​
    var favoritesScale = d3.scaleLinear()
      .range([midpoint - .05, -.85]);
    var versionsScale = d3.scaleOrdinal()
      .range(_.rangeRight(3, 7));
    var firstsScale = d3.scaleOrdinal();
    var hexScale = 40;
    var hexSize = hexScale * 2 / Math.sqrt(3);
    
    d3.csv('data.csv', data => {
      /**************************************
      ** process data and add them to scales as domain
      **************************************/
      var attendees = _.map(data, d => {
        return {
          name: d['First Name'],
          first: d.first.split(', ')[0],
          favorite: d.favorite.split(', ')[0],
          version: parseInt(d.version.replace('v', '')),
        };
      });
      var firsts = _.chain(attendees)
        .map('first').flatten()
        .countBy().toPairs()
        .sortBy(d => -d[1])
        .map(0).value();
​
      var favorites = _.chain(attendees)
        .map('favorite').flatten()
        .countBy().value();
​
      var versions = _.chain(attendees)
        .map('version').flatten()
        .countBy().toPairs()
        .sortBy(d => -d[1])
        .filter(d => d[1] > 1)
        .map(0).value();
      
      // update colors with number of classes
      
      var colors = chroma.cubehelix()
        .start(280)
//         .rotations(-1 / firsts.length)
        .gamma(0.5)
        .lightness([0.3, 0.4])
        .scale() // convert to chroma.scale
//         .correctLightness()
        .colors(firsts.length);
      firstsScale.domain(firsts).range(colors);
      versionsScale.domain(_.range(1, 5));
      var maxFavorites = _.max(_.values(favorites));
      favoritesScale.domain([1, maxFavorites]);
​
      /**************************************
      ** legend
      **************************************/
      var baseLegendData = {
        version: 1,
        first: 'Bar chart',
        favorite: 'd3.scale',
      };
      var legend = d3.select('#legend');
      var annotation = d3.select('#annotation');
      
      // first, the versions
//       annotation.append('div')
//          .style('position', 'absolute')
//          .style('width', '1000px')
//          .style('top', hexScale)
//          .html('Which version of d3 did you start with?');
      var versionsData = _.times(4, i => {
        return Object.assign(_.clone(baseLegendData), {
          version: i + 1,
          legendText: 'd3 v' + (i + 1),
        });
      });
      legend.append('g')
        .attr('transform', 'translate(' + [0, 0] + ')')
        .call(drawHexagons, versionsData, 4);
      
      // first
//       annotation.append('div')
//          .style('position', 'absolute')
//          .style('width', '1000px')
//          .style('top', 5.5 * hexScale)
//          .html('Your first d3 project:<br />what type of visualization was it?');
      var firstData1 = _.times(4, i => {
        var index = !i ? i : i * 4 - 1;
        return Object.assign(_.clone(baseLegendData), {
          first: firsts[index],
          legendText: firsts[index],
        });
      });
      var firstData2 = _.times(3, i => {
        var index = (!i ? i : i * 4 - 1) + 14;
        return Object.assign(_.clone(baseLegendData), {
          first: firsts[index],
          legendText: firsts[index],
        });
      });
      legend.append('g')
        .attr('transform', 'translate(' + [0, 4 * hexScale] + ')')
        .call(drawHexagons, firstData1, 4);
      legend.append('g')
        .attr('transform', 'translate(' + [1.9 * hexScale, 6.75 * hexScale] + ')')
        .call(drawHexagons, firstData2, 3);
      
      // favorites
//       annotation.append('div')
//          .style('position', 'absolute')
//          .style('width', '1000px')
//          .style('top', 13.5 * hexScale)
//          .html('What is your favorite d3 api function?');
      var favoriteNames = ['d3.scale', 'd3.transition', 'd3.forceSimulation', 'd3.hierarchy'];
      var favoriteData = _.times(4, i => {
        return Object.assign(_.clone(baseLegendData), {
          favorite: favoriteNames[i],
          legendText: favoriteNames[i],
        });
      });
      legend.append('g')
        .attr('transform', 'translate(' + [0, 10.75 * hexScale] + ')')
        .call(drawHexagons, favoriteData, 4);
      
      /**************************************
      ** draw the hexagons
      **************************************/
      var perRow = 5;
      var svg = d3.select('#flowers').append('g')
        .call(drawHexagons, attendees, perRow);
       
      function drawHexagons(selection, data, perRow) {
        var hex = selection.selectAll('.hex')
          .data(data).enter().append('g')
          .classed('hex', true)
          .attr('transform', (d, i) => {
            var row = Math.floor(i / perRow);
            var x = (i % perRow * 3.2 + 1.5) * hexSize;
            if (row % 2) {
              x += 1.6 * hexSize;
            }
            var y = (row * 1.05 + 2) * hexScale;
            d.x = x;
            d.y = y;
            return 'translate(' + [x, y] + ')scale(' + hexScale + ')';
          }).on('mouseenter', mouseenter)
          .on('mouseleave', mouseleave);
​
        var triangles = hex.selectAll('triangle')
          .data((d, j) => {
            return _.times(versionsScale(d.version), i => {
              return {
                angle: i * 60,
                midpoint: favoritesScale(favorites[d.favorite]),
                color: firstsScale(d.first),
  //               color: colors[j],
              };
            });
          }).enter().append('g')
          .classed('triangle', true)
          .attr('transform', d => 'rotate(' + d.angle + ')');
​
        triangles.append('polygon')
          .attr('points', triangle.join(' '))
          .attr('fill', d => chroma(d.color).darken(2.5));
  //        .attr('fill', '#fff');
        triangles.selectAll('.subtri')
          .data(d => _.times(3, i => {
            return Object.assign({
              subangle: i * 120,
              subcolor: chroma(d.color).saturate(1.5).brighten(i),
            }, d);
          })).enter().append('polygon')
          .classed('subtri', true)
          .attr('transform', d => 'rotate(' + d.subangle + ' 0 ' + midpoint + ')')
          .attr('points', d => {
            return [
              (-halfSide) + ',-1',
              '0,' + d.midpoint,
              halfSide + ',-1'
            ].join(' ');
          }).attr('fill',  d => d.subcolor); 
        
        // add in text if it's for legend
        var fontSize = 14;
        hex.filter(d => d.legendText)
          .append('text')
          .attr('y', 1.25)
            .attr('font-size', fontSize / hexScale)
          .attr('text-anchor', 'middle')
          .attr('dy', '.35em')
          .text(d => d.legendText);
      }
      
    });
    
    /**************************************
    ** hover interaction
    **************************************/
    var hover = d3.select('#hover')
        .style('display', 'none');
    function mouseenter(d) {
      if (!d.name) return;
      var html = '<h2>' + d.name + '</h2>';
      html += '<p>started with d3.js v' + d.version;
      if (d.first) {
        html += ' and made a ' + d.first;
      }
      if (d.favorite) {
        html += '.  Their favorite d3 function is ' + d.favorite;
      }
      html += '.';
      
      var x = d.x + hexSize / 2;
      var y = d.y + hexSize / 2;
      hover.style('display', 'block')
        .style('top', y + 'px')
        .style('left', x + 'px')
        .html(html);
    }
    
    function mouseleave() {
      hover.style('display', 'none');
    }
    
  </script>
</body>
​
    