text: // 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, {Component} from 'react';
  
  import {XYPlot, XAxis, YAxis, HeatmapSeries, Hint} from 'index';
  
  export default class HeatmapChart extends Component {
    state = {
      value: false
    };
  
    render() {
      const {value} = this.state;
      return (
        <XYPlot width={300} height={300}>
          <XAxis />
          <YAxis />
          <HeatmapSeries
            className="heatmap-series-example"
            onValueMouseOver={v => this.setState({value: v})}
            onSeriesMouseOut={v => this.setState({value: false})}
            data={[
              {x: 1, y: 0, color: 10},
              {x: 1, y: 5, color: 10},
              {x: 1, y: 10, color: 6},
              {x: 1, y: 15, color: 7},
              {x: 2, y: 0, color: 12},
              {x: 2, y: 5, color: 2},
              {x: 2, y: 10, color: 1},
              {x: 2, y: 15, color: 12},
              {x: 3, y: 0, color: 9},
              {x: 3, y: 5, color: 2},
              {x: 3, y: 10, color: 6},
              {x: 3, y: 15, color: 12}
            ]}
          />
          {value !== false && <Hint value={value} />}
        </XYPlot>
      );
    }
  }
  