react-d3-tooltip/lib/utils/voronoi.js

react-d3 tooltip implementation

"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);

var _d3Voronoi = require('d3-voronoi');

var _d3Voronoi2 = _interopRequireDefault(_d3Voronoi);

var _d3Selection = require('d3-selection');

var _d3Selection2 = _interopRequireDefault(_d3Selection);

var _d3Collection = require('d3-collection');

var _d3Collection2 = _interopRequireDefault(_d3Collection);

var _d3Array = require('d3-array');

var _d3Array2 = _interopRequireDefault(_d3Array);

var _reactFauxDom = require('react-faux-dom');

var _reactFauxDom2 = _interopRequireDefault(_reactFauxDom);

var _reactD3Shape = require('react-d3-shape');

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 Voronoi = function (_Component) {
  _inherits(Voronoi, _Component);

  function Voronoi(props) {
    _classCallCheck(this, Voronoi);

    return _possibleConstructorReturn(this, Object.getPrototypeOf(Voronoi).call(this, props));
  }

  _createClass(Voronoi, [{
    key: 'triggerOut',
    value: function triggerOut(d, e) {
      this.props.onMouseOut(e, d);
    }
  }, {
    key: 'triggerOver',
    value: function triggerOver(d, e) {
      var _props = this.props;
      var xScaleSet = _props.xScaleSet;
      var yScaleSet = _props.yScaleSet;
      var stack = _props.stack;


      this.props.onMouseOver(e, d, xScaleSet, yScaleSet, stack);
    }
  }, {
    key: '_mkVoronoi',
    value: function _mkVoronoi() {
      var _this2 = this;

      var _props2 = this.props;
      var x = _props2.x;
      var y = _props2.y;
      var stack = _props2.stack;
      var height = _props2.height;

      // because d3.geom.voronoi does not handle coincident points (and this data from the government comes pre-rounded to a tenth of a degree), d3.nest is used to collapse coincident points before constructing the Voronoi.
      // see example: http://bl.ocks.org/mbostock/8033015

      var mkSeries = (0, _reactD3Shape.series)(this.props);

      if (stack) {
        var _setStack = this._setStack();
        var dataset = _setStack(mkSeries);
      } else {
        var dataset = mkSeries;
      }

      var nestData = _d2.default.nest().key(function (d) {
        return d.x + "," + d.y + "," + d.y0;
      }).rollup(function (v) {
        return v[0];
      }).entries(_d2.default.merge(dataset.map(function (d) {
        return d.data;
      }))).map(function (d) {
        return d.values;
      });

      var voronoiPolygon = this._setGeomVoronoi().call(this, nestData);

      return _react2.default.createElement(
        'g',
        null,
        voronoiPolygon.map(function (area) {
          return _react2.default.createElement('path', {
            d: "M" + area.join("L") + "Z",
            onMouseOut: _this2.triggerOut.bind(_this2, area.point),
            onMouseOver: _this2.triggerOver.bind(_this2, area.point),
            style: { fill: 'none', pointerEvents: 'all' }
          });
        })
      );
    }
  }, {
    key: '_setStack',
    value: function _setStack() {
      var chartSeries = this.props.chartSeries;


      var buildOut = function buildOut(len) {
        // baseline for positive and negative bars respectively.
        var currentXOffsets = [];
        var currentXIndex = 0;

        return function (d, y0, y) {

          if (currentXIndex++ % len === 0) {
            currentXOffsets = [0, 0];
          }

          if (y >= 0) {
            d.y0 = currentXOffsets[1];
            d.y = y;
            currentXOffsets[1] += y;
          } else {
            d.y0 = currentXOffsets[0] + y;
            d.y = -y;
            currentXOffsets[0] += y;
          }
        };
      };

      return _d2.default.layout.stack().values(function (d) {
        return d.data;
      }).out(buildOut(chartSeries.length));
    }
  }, {
    key: '_setGeomVoronoi',
    value: function _setGeomVoronoi() {
      var _props3 = this.props;
      var width = _props3.width;
      var height = _props3.height;
      var margins = _props3.margins;
      var x = _props3.x;
      var xScaleSet = _props3.xScaleSet;
      var y = _props3.y;
      var yScaleSet = _props3.yScaleSet;
      var stack = _props3.stack;


      var voronoi = _d2.default.geom.voronoi().x(function (d) {
        return xScaleSet(d.x);
      }).y(function (d) {
        return stack ? yScaleSet(d.y + d.y0) : yScaleSet(d.y);
      }).clipExtent([[-margins.left, -margins.top], [width + margins.right, height + margins.bottom]]);

      return voronoi;
    }
  }, {
    key: 'render',
    value: function render() {
      var voronoi = this._mkVoronoi();

      return _react2.default.createElement(
        'g',
        { className: 'react-d3-basics__voronoi_utils' },
        voronoi
      );
    }
  }]);

  return Voronoi;
}(_react.Component);

Voronoi.defaultProps = {
  onMouseOver: function onMouseOver(d) {},
  onMouseOut: function onMouseOut(d) {}
};
exports.default = Voronoi;
module.exports = exports['default'];