bar-series.js

// Copyright (c) 2016 - 2017 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

import React from 'react';
import PropTypes from 'prop-types';

import Animation from 'animation';
import {ANIMATED_SERIES_PROPS, getStackParams} from 'utils/series-utils';
import {getCombinedClassName} from 'utils/styling-utils';

import AbstractSeries from './abstract-series';

const predefinedClassName = 'rv-xy-plot__series rv-xy-plot__series--bar';

class BarSeries extends AbstractSeries {
  static get propTypes() {
    return {
      ...AbstractSeries.propTypes,
      linePosAttr: PropTypes.string,
      valuePosAttr: PropTypes.string,
      lineSizeAttr: PropTypes.string,
      valueSizeAttr: PropTypes.string,
      cluster: PropTypes.string,
      barWidth: PropTypes.number
    };
  }

  static get defaultProps() {
    return {
      barWidth: 0.85
    };
  }

  render() {
    const {
      animation,
      className,
      data,
      linePosAttr,
      lineSizeAttr,
      marginLeft,
      marginTop,
      style,
      valuePosAttr,
      valueSizeAttr,
      barWidth
    } = this.props;

    if (!data) {
      return null;
    }

    if (animation) {
      return (
        <Animation {...this.props} animatedProps={ANIMATED_SERIES_PROPS}>
          <BarSeries {...this.props} animation={null} />
        </Animation>
      );
    }

    const {sameTypeTotal, sameTypeIndex} = getStackParams(this.props);

    const distance = this._getScaleDistance(linePosAttr);
    const lineFunctor = this._getAttributeFunctor(linePosAttr);
    const valueFunctor = this._getAttributeFunctor(valuePosAttr);
    const value0Functor = this._getAttr0Functor(valuePosAttr);
    const fillFunctor =
      this._getAttributeFunctor('fill') || this._getAttributeFunctor('color');
    const strokeFunctor =
      this._getAttributeFunctor('stroke') || this._getAttributeFunctor('color');
    const opacityFunctor = this._getAttributeFunctor('opacity');

    const halfSpace = (distance / 2) * barWidth;

    return (
      <g
        className={getCombinedClassName(predefinedClassName, className)}
        transform={`translate(${marginLeft},${marginTop})`}
      >
        {data.map((d, i) => {
          // totalSpaceAvailable is the space we have available to draw all the
          // bars of a same 'linePosAttr' value (a.k.a. sameTypeTotal)
          const totalSpaceAvailable = halfSpace * 2;
          const totalSpaceCenter = lineFunctor(d);
          // totalSpaceStartingPoint is the first pixel were we can start drawing
          const totalSpaceStartingPoint = totalSpaceCenter - halfSpace;
          // spaceTakenByInterBarsPixels has the overhead space consumed by each bar of sameTypeTotal
          const spaceTakenByInterBarsPixels = (sameTypeTotal - 1) / sameTypeTotal;
          // spacePerBar is the space we have available to draw sameTypeIndex bar
          const spacePerBar = (totalSpaceAvailable / sameTypeTotal) - spaceTakenByInterBarsPixels;
          // barStartingPoint is the first pixel were we can start drawing sameTypeIndex bar
          const barStartingPoint = totalSpaceStartingPoint + spacePerBar * sameTypeIndex +
            sameTypeIndex;

          const attrs = {
            style: {
              opacity: opacityFunctor && opacityFunctor(d),
              stroke: strokeFunctor && strokeFunctor(d),
              fill: fillFunctor && fillFunctor(d),
              ...style
            },
            [linePosAttr]: barStartingPoint,
            [lineSizeAttr]: spacePerBar,
            [valuePosAttr]: Math.min(value0Functor(d), valueFunctor(d)),
            [valueSizeAttr]: Math.abs(-value0Functor(d) + valueFunctor(d)),
            onClick: e => this._valueClickHandler(d, e),
            onContextMenu: e => this._valueRightClickHandler(d, e),
            onMouseOver: e => this._valueMouseOverHandler(d, e),
            onMouseOut: e => this._valueMouseOutHandler(d, e),
            key: i
          };
          return <rect {...attrs} />;
        })}
      </g>
    );
  }
}

BarSeries.displayName = 'BarSeries';

export default BarSeries;