wui-bigdata/dist-modules/Histogram.js

Big data visualization library for WUI framework.

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();

var _react = require('react');

var _react2 = _interopRequireDefault(_react);

var _d = require('d3');

var _d2 = _interopRequireDefault(_d);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }

function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }

var Histogram = function (_Component) {
  _inherits(Histogram, _Component);

  function Histogram() {
    _classCallCheck(this, Histogram);

    return _possibleConstructorReturn(this, Object.getPrototypeOf(Histogram).apply(this, arguments));
  }

  _createClass(Histogram, [{
    key: 'componentDidMount',
    value: function componentDidMount() {
      _d2.default.select(this.refs.xAxis).call(this.xAxis);
    }
  }, {
    key: 'render',
    value: function render() {
      var rand = _d2.default.random.normal(170, 10);
      var dataset = [];

      for (var i = 0; i < 100; i++) {
        dataset.push(rand());
      }

      var binNum = 20;
      var rangeMin = 130;
      var rangeMax = 210;
      var histogram = _d2.default.layout.histogram().range([rangeMin, rangeMax]).bins(binNum).frequency(true);
      var hisData = histogram(dataset);
      var width = 600;
      var height = 600;
      var xAxisWidth = 450;
      var xTicks = hisData.map(function (d) {
        return d.x;
      });
      var xScale = _d2.default.scale.ordinal().domain(xTicks).rangeRoundBands([0, xAxisWidth], 0.1);
      var padding = { top: 30, right: 30, bottom: 30, left: 30 };
      this.xAxis = _d2.default.svg.axis().scale(xScale).orient('bottom').tickFormat(_d2.default.format('.0f'));
      var yAxisWidth = 450;
      var yScale = _d2.default.scale.linear().domain([_d2.default.min(hisData, function (d) {
        return d.y;
      }), _d2.default.max(hisData, function (d) {
        return d.y;
      })]).range([5, yAxisWidth]);
      var lineGenerator = _d2.default.svg.line().x(function (d) {
        return xScale(d.x);
      }).y(function (d) {
        return height - yScale(d.y);
      }).interpolate('basis');

      return _react2.default.createElement(
        'svg',
        { width: width, height: height },
        _react2.default.createElement(
          'g',
          { transform: 'translate(' + padding.left + ', -' + padding.bottom + ')' },
          hisData.map(function (data, index) {
            return _react2.default.createElement('rect', { key: index,
              className: 'rect',
              fill: 'steelblue',
              x: xScale(data.x),
              y: height - yScale(data.y),
              width: xScale.rangeBand(),
              height: yScale(data.y) });
          })
        ),
        _react2.default.createElement('g', { className: 'axis',
          ref: 'xAxis',
          transform: 'translate(' + padding.left + ', ' + (height - padding.bottom) + ')' }),
        _react2.default.createElement(
          'g',
          { transform: 'translate(' + padding.left + ', ' + -padding.bottom + ')' },
          _react2.default.createElement('path', { className: 'linePath',
            fill: 'none',
            stroke: 'green',
            strokeWidth: 4,
            d: lineGenerator(hisData) })
        )
      );
    }
  }]);

  return Histogram;
}(_react.Component);

exports.default = Histogram;