content: // 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 ShowcaseButton from '../showcase-components/showcase-button';
  
  import {
    XYPlot,
    XAxis,
    YAxis,
    VerticalGridLines,
    HorizontalGridLines,
    VerticalBarSeries,
    VerticalBarSeriesCanvas,
    DiscreteColorLegend
  } from 'react-vis';
  
  export default class Example extends React.Component {
    state = {
      useCanvas: false
    };
    render() {
      const {useCanvas} = this.state;
      const BarSeries = useCanvas ? VerticalBarSeriesCanvas : VerticalBarSeries;
      const content = useCanvas ? 'TOGGLE TO SVG' : 'TOGGLE TO CANVAS';
  
      return (
        <div>
          <ShowcaseButton
            onClick={() => this.setState({useCanvas: !useCanvas})}
            buttonContent={content}
          />
          <XYPlot
            className="clustered-stacked-bar-chart-example"
            xType="ordinal"
            stackBy="y"
            width={300}
            height={300}
          >
            <DiscreteColorLegend
              style={{position: 'absolute', left: '50px', top: '10px'}}
              orientation="horizontal"
              items={[
                {
                  title: 'Apples',
                  color: '#12939A'
                },
                {
                  title: 'Oranges',
                  color: '#79C7E3'
                }
              ]}
            />
            <VerticalGridLines />
            <HorizontalGridLines />
            <XAxis />
            <YAxis />
            <BarSeries
              cluster="2015"
              color="#12939A"
              data={[
                {x: 'Q1', y: 10},
                {x: 'Q2', y: 5},
                {x: 'Q3', y: 15},
                {x: 'Q4', y: 20}
              ]}
            />
            <BarSeries
              cluster="2015"
              color="#79C7E3"
              data={[
                {x: 'Q1', y: 3},
                {x: 'Q2', y: 7},
                {x: 'Q3', y: 2},
                {x: 'Q4', y: 1}
              ]}
            />
            <BarSeries
              cluster="2016"
              color="#12939A"
              data={[
                {x: 'Q1', y: 3},
                {x: 'Q2', y: 8},
                {x: 'Q3', y: 11},
                {x: 'Q4', y: 19}
              ]}
            />
            <BarSeries
              cluster="2016"
              color="#79C7E3"
              data={[
                {x: 'Q1', y: 22},
                {x: 'Q2', y: 2},
                {x: 'Q3', y: 22},
                {x: 'Q4', y: 18}
              ]}
            />
          </XYPlot>
        </div>
      );
    }
  }
  