README.md

## README.md

      
        

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              README.md
            
          
        
      
    
  
    Multi-series bar chart rendered using React and D3.

  

  

## index.html
<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>React + d3</title>
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <script src="http://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.5.2/underscore.js"></script>
    <script src="http://cdnjs.cloudflare.com/ajax/libs/react/0.8.0/react.js"></script>
    <script src="http://cdnjs.cloudflare.com/ajax/libs/react/0.8.0/JSXTransformer.js"></script>
    <script src="http://cdnjs.cloudflare.com/ajax/libs/d3/3.3.13/d3.js"></script>
  </head>
  <body>
    <div id="container"> </div>

    <script type="text/jsx">
      /** @jsx React.DOM */
      var Chart = React.createClass({
        render: function() {
          return (
            <svg width={this.props.width} height={this.props.height}>{this.props.children}</svg>
          );
        }
      });

      var Bar = React.createClass({
        getDefaultProps: function() {
          return {
            width: 0,
            height: 0,
            x: 0,
            y: 0
          }
        },

        render: function() {
          return (
            <rect fill={this.props.color}
              width={this.props.width} height={this.props.height}
              x={this.props.x} y={this.props.y} />
          );
        }
      });

      var DataSeries = React.createClass({
        getDefaultProps: function() {
          return {
            title: '',
            data: []
          }
        },

        render: function() {
          var self = this,
              props = this.props,
              refs = props.__owner__.refs
              size = props.size,
              width = size.width,
              height = size.height;

          var yScale = props.yScale;

          var xScale = d3.scale.ordinal()
            .domain(d3.range(props.data.length))
            .rangeRoundBands([0, width], 0.05);

          var otherSeries = _.chain(refs)
            .values()
            .reject(function(component) { return component === self; })
            .value();

          var bars = _.map(props.data, function(point, i) {
            var yOffset = _.reduce(otherSeries, function(memo, series) {
              return memo + series.props.data[i];
            }, 0);

            return (
              <Bar height={yScale(point)} width={xScale.rangeBand()} x={xScale(i)} y={size.height - yScale(yOffset) - yScale(point)} color={props.color} key={i} />
            )
          });

          return (
            <g>{bars}</g>
          );
        }
      });

      var StackedBarChart = React.createClass({
        getDefaultProps: function() {
          return {
            width: 600,
            height: 300
          }
        },

        render: function() {
          var data = this.props.data,
              size = { width: this.props.width, height: this.props.height };

          var zipped = _.zip(data.series1, data.series2, data.series3);

          var totals = _.map(zipped, function(values) {
            return _.reduce(values, function(memo, value) { return memo + value; }, 0);
          });

          var yScale = d3.scale.linear()
            .domain([0, d3.max(totals)])
            .range([0, this.props.height]);

          return (
            <Chart width={this.props.width} height={this.props.height}>
              <DataSeries data={data.series1} size={size} yScale={yScale} ref="series1" color="cornflowerblue" />
              <DataSeries data={data.series2} size={size} yScale={yScale} ref="series2" color="red" />
              <DataSeries data={data.series3} size={size} yScale={yScale} ref="series3" color="green" />
            </Chart>
          );
        }
      });

      var data = {
        series1: [ 30, 10, 5, 8, 15, 10 ],
        series2: [ 5, 20, 12, 4, 6, 2 ],
        series3: [ 5, 8, 2, 4, 6, 2 ]
      };

      React.renderComponent(
        <StackedBarChart data={data} />,
        document.getElementById('container')
      );
    </script>
  </body>
</html>