react-native-svg-charts/lib/module/area-chart.js

Customizable charts (Line, Bar, Area, Pie, Circle, Progress) for React Native

function ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); if (enumerableOnly) symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; }); keys.push.apply(keys, symbols); } return keys; }

function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? arguments[i] : {}; if (i % 2) { ownKeys(Object(source), true).forEach(function (key) { _defineProperty(target, key, source[key]); }); } else if (Object.getOwnPropertyDescriptors) { Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)); } else { ownKeys(Object(source)).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } } return target; }

function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }

import * as shape from 'd3-shape';
import PropTypes from 'prop-types';
import Chart from './chart/chart';

class AreaChart extends Chart {
  createPaths({
    data,
    x,
    y
  }) {
    const {
      curve,
      start
    } = this.props;
    const area = shape.area().x(d => x(d.x)).y0(y(start)).y1(d => y(d.y)).defined(item => typeof item.y === 'number').curve(curve)(data);
    const line = shape.line().x(d => x(d.x)).y(d => y(d.y)).defined(item => typeof item.y === 'number').curve(curve)(data);
    return {
      path: area,
      area,
      line
    };
  }

}

AreaChart.propTypes = _objectSpread({}, Chart.propTypes, {
  start: PropTypes.number
});
AreaChart.defaultProps = _objectSpread({}, Chart.defaultProps, {
  start: 0
});
export default AreaChart;
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