content: import React from 'react';
  import ReactDOM from 'react-dom';
  
  import JqxChart from '../../../jqwidgets-react/react_jqxchart.js';
  import JqxDropDownList from '../../../jqwidgets-react/react_jqxdropdownlist.js';
  
  class App extends React.Component {
      componentDidMount() {
          this.refs.myDropDownList.on('change', (event) => {
              let selectedIndex = this.refs.myDropDownList.selectedIndex();
              this.refs.myChart.colorScheme(this.colorSchemes()[selectedIndex].name);
          });
      }
      colorSchemes() {
          let schemes = [
              { name: 'scheme01', colors: ['#307DD7', '#AA4643', '#89A54E', '#71588F', '#4198AF'] },
              { name: 'scheme02', colors: ['#7FD13B', '#EA157A', '#FEB80A', '#00ADDC', '#738AC8'] },
              { name: 'scheme03', colors: ['#E8601A', '#FF9639', '#F5BD6A', '#599994', '#115D6E'] },
              { name: 'scheme04', colors: ['#D02841', '#FF7C41', '#FFC051', '#5B5F4D', '#364651'] },
              { name: 'scheme05', colors: ['#25A0DA', '#309B46', '#8EBC00', '#FF7515', '#FFAE00'] },
              { name: 'scheme06', colors: ['#0A3A4A', '#196674', '#33A6B2', '#9AC836', '#D0E64B'] },
              { name: 'scheme07', colors: ['#CC6B32', '#FFAB48', '#FFE7AD', '#A7C9AE', '#888A63'] },
              { name: 'scheme08', colors: ['#3F3943', '#01A2A6', '#29D9C2', '#BDF271', '#FFFFA6'] },
              { name: 'scheme09', colors: ['#1B2B32', '#37646F', '#A3ABAF', '#E1E7E8', '#B22E2F'] },
              { name: 'scheme10', colors: ['#5A4B53', '#9C3C58', '#DE2B5B', '#D86A41', '#D2A825'] },
              { name: 'scheme11', colors: ['#993144', '#FFA257', '#CCA56A', '#ADA072', '#949681'] },
              { name: 'scheme12', colors: ['#105B63', '#EEEAC5', '#FFD34E', '#DB9E36', '#BD4932'] },
              { name: 'scheme13', colors: ['#BBEBBC', '#F0EE94', '#F5C465', '#FA7642', '#FF1E54'] },
              { name: 'scheme14', colors: ['#60573E', '#F2EEAC', '#BFA575', '#A63841', '#BFB8A3'] },
              { name: 'scheme15', colors: ['#444546', '#FFBB6E', '#F28D00', '#D94F00', '#7F203B'] },
              { name: 'scheme16', colors: ['#583C39', '#674E49', '#948658', '#F0E99A', '#564E49'] },
              { name: 'scheme17', colors: ['#142D58', '#447F6E', '#E1B65B', '#C8782A', '#9E3E17'] },
              { name: 'scheme18', colors: ['#4D2B1F', '#635D61', '#7992A2', '#97BFD5', '#BFDCF5'] },
              { name: 'scheme19', colors: ['#844341', '#D5CC92', '#BBA146', '#897B26', '#55591C'] },
              { name: 'scheme20', colors: ['#56626B', '#6C9380', '#C0CA55', '#F07C6C', '#AD5472'] },
              { name: 'scheme21', colors: ['#96003A', '#FF7347', '#FFBC7B', '#FF4154', '#642223'] },
              { name: 'scheme22', colors: ['#5D7359', '#E0D697', '#D6AA5C', '#8C5430', '#661C0E'] },
              { name: 'scheme23', colors: ['#16193B', '#35478C', '#4E7AC7', '#7FB2F0', '#ADD5F7'] },
              { name: 'scheme24', colors: ['#7B1A25', '#BF5322', '#9DA860', '#CEA457', '#B67818'] },
              { name: 'scheme25', colors: ['#0081DA', '#3AAFFF', '#99C900', '#FFEB3D', '#309B46'] },
              { name: 'scheme26', colors: ['#0069A5', '#0098EE', '#7BD2F6', '#FFB800', '#FF6800'] },
              { name: 'scheme27', colors: ['#FF6800', '#A0A700', '#FF8D00', '#678900', '#0069A5'] }
          ];
  
          return schemes;
      }
      render() {
          let sampleData = [
              { Day: 'Monday', Keith: 30, Erica: 15, George: 25, Monica: 20, Maria: 15 },
              { Day: 'Tuesday', Keith: 25, Erica: 25, George: 30, Monica: 25, Maria: 20 },
              { Day: 'Wednesday', Keith: 30, Erica: 20, George: 25, Monica: 10, Maria: 20 },
              { Day: 'Thursday', Keith: 35, Erica: 25, George: 45, Monica: 30, Maria: 30 },
              { Day: 'Friday', Keith: 20, Erica: 20, George: 25, Monica: 45, Maria: 30 },
              { Day: 'Saturday', Keith: 30, Erica: 20, George: 30, Monica: 60, Maria: 40 },
              { Day: 'Sunday', Keith: 60, Erica: 45, George: 90, Monica: 70, Maria: 50 }
          ];
  
          let padding = { left: 5, top: 5, right: 5, bottom: 5 };
  
          let titlePadding = { left: 90, top: 0, right: 0, bottom: 10 };
  
          let xAxis =
              {
                  dataField: 'Day',
                  showGridLines: true
              };
  
          let seriesGroups =
              [
                  {
                      type: 'column',
                      columnsGapPercent: 50,
                      seriesGapPercent: 0,
                      valueAxis:
                      {
                          unitInterval: 10,
                          minValue: 0,
                          maxValue: 100,
                          displayValueAxis: true,
                          description: 'Time in minutes',
                          axisSize: 'auto',
                          tickMarksColor: '#888888'
                      },
                      series: [
                          { dataField: 'Keith', displayText: 'Keith' },
                          { dataField: 'Erica', displayText: 'Erica' },
                          { dataField: 'George', displayText: 'George' },
                          { dataField: 'Monica', displayText: 'Monica' },
                          { dataField: 'Maria', displayText: 'Maria' }
                      ]
                  }
              ];
  
          
          let itemTemplate = (index) => {
              if (index == -1) return '';
              let colors = this.colorSchemes()[index].colors;
              let html = '';
              for (let i = 0; i < colors.length; i++) {
                  html += '<div style="float: left; border-radius: 100%; width: 25px; height: 25px; border: none; background:' + colors[i] + '; margin-left: 4px;"></div>';
              }
              return html;
          };
          let selectionTemplate = (element, index) => {
              if (index < 0)
                  return;
              let colors = this.colorSchemes()[index].colors;
              let html = '';
              for (let i = 0; i < colors.length; i++) {
                  html += '<div style="margin-top: 2px; float: left; border-radius: 100%; width: 25px; height: 25px; border: none; background:' + colors[i] + '; margin-left: 4px;"></div>';
              }
              return html;
          };
          return (
              <div>
                  <JqxChart ref='myChart' style={{ width: 850, height: 500 }}
                      title={'Fitness & exercise weekly scorecard'} description={'Time spent in vigorous exercise'}
                      showLegend={true} enableAnimations={false} padding={padding}
                      titlePadding={titlePadding} source={sampleData} xAxis={xAxis}
                      colorScheme={'scheme01'} seriesGroups={seriesGroups}
                  />
                  <br />
                  Themes:
                  <JqxDropDownList ref='myDropDownList'
                      width={180} height={28} selectedIndex={0} itemHeight={35} selectionRenderer={selectionTemplate}
                      source={this.colorSchemes()} displayMember={'name'} renderer={itemTemplate}
                  /> 
              </div>
          )
      }
  }
  
  ReactDOM.render(<App />, document.getElementById('app'));
  