Chart events

<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/@toclocoinc/lattice-grid@1.27.0/lattice-grid.min.css">

<div id="app"></div>

<script type="module">
  import React from 'https://esm.sh/react@18';
  import { createRoot } from 'https://esm.sh/react-dom@18/client';
  import { createGrid } from 'https://cdn.jsdelivr.net/npm/@toclocoinc/lattice-grid@1.27.0/lattice-grid.esm.min.js';
  import createLatticeGrid from 'https://cdn.jsdelivr.net/npm/@toclocoinc/lattice-grid@1.27.0/modules/react.esm.min.js';
  import { createChart } from 'https://cdn.jsdelivr.net/npm/@toclocoinc/lattice-grid@1.27.0/modules/charts.esm.min.js';

  const LatticeGrid = createLatticeGrid({ React, createGrid });

  const columns = [
    { field: 'circuit', title: 'Circuit', layout: { width: 180 } },
    { field: 'region', title: 'Region', filter: { type: 'set' } },
    { field: 'status', title: 'Status', filter: { type: 'set' } },
    { field: 'bandwidth', title: 'Bandwidth', type: 'number' },
    { field: 'charge', title: 'Monthly charge', type: 'number',
      format: { style: 'currency', currency: 'GBP' }, total: 'sum' },
  ];

  const rows = [/* circuit records */];

  function App() {
    const gridRef = React.useRef(null);

    React.useEffect(() => {
      const grid = gridRef.current.grid;
      const chart = createChart({ grid, container: '#chart', type: 'pie', x: 'status', y: 'charge',
        title: 'Charge by status' });

      // Every chart event hands you one flat payload. Read the parts you want off
      // it: category and value on a click, category on a hover, label and hidden
      // on a legend toggle.
      chart.on('click',  (e) => console.log('click',  e.category, e.value));
      chart.on('hover',  (e) => console.log('hover',  e.category));
      chart.on('legend', (e) => console.log('legend', e.label, e.hidden));
    }, []);

    return (
      <>
        <div id="chart" style={{ height: '260px' }} />
        <LatticeGrid
          ref={gridRef}
          rowKey="id"
          columns={columns}
          rows={rows}
          style={{ height: '340px', marginTop: '14px' }}
        />
      </>
    );
  }

  createRoot(document.getElementById('app')).render(<App />);
</script>