Mouse Events (React)

To handle mouse events, add a listener to the FlexGrid contrl's hostElement and use the hitTest method to determine which grid panel and cell were clicked. The grid below has a handler attached to the 'mousemove' event, and shows information about the element under the mouse.

Learn about FlexGrid | FlexGrid API Reference

This example uses React.

import 'bootstrap.css'; import '@mescius/wijmo.styles/wijmo.css'; import ReactDOM from 'react-dom/client'; import React from 'react'; import useEvent from 'react-use-event-hook'; import * as wijmo from '@mescius/wijmo'; import * as grid from '@mescius/wijmo.grid'; import * as wjGrid from '@mescius/wijmo.react.grid'; import './app.css'; import { data } from './data'; const view = new wijmo.CollectionView(data, { groupDescriptions: ['country'] // group data by country }); function App() { const flexInitialized = useEvent((sender) => { sender.addEventListener(sender.hostElement, 'mousemove', (e) => { let ht = sender.hitTest(e), logText = `panel <b>${grid.CellType[ht.cellType]}</b> row <b>${ht.row}</b> col <b>${ht.col}</b>`; if (e.target.classList.contains('my-button')) { logText += ' (fake button!)'; } else if (e.target.tagName == 'INPUT' && e.target.type == 'checkbox') { logText += ' (checkbox!)'; } else if (ht.panel == sender.cells) { if (sender.rows[ht.row] instanceof grid.GroupRow) { logText += ' (group row)'; } else { logText += ' (value: <b>' + sender.cells.getCellData(ht.row, ht.col, true) + '</b>)'; } } const node = document.querySelector('#log'); if (node) { node.innerHTML = logText; } }); }); const formatFlexGrid = useEvent((sender, e) => { // add 'button' to country cells if (e.panel == sender.cells) { if (sender.columns[e.col].binding == 'country' && !(sender.rows[e.row] instanceof grid.GroupRow)) { if (sender.editRange != null && sender.editRange.contains(e.row, e.col)) { let spanEle = document.createElement('span'); spanEle.className = 'my-button'; spanEle.innerHTML = '&#x2b24;'; sender.activeEditor.style.width = '75%'; e.cell.insertBefore(spanEle, sender.activeEditor); } else { let html = '<span class="my-button">&#x2b24;</span>' + e.cell.innerHTML; e.cell.innerHTML = html; } } } }); return (<main className="container-fluid"> <div id="log">please move the mouse over the grid</div> <wjGrid.FlexGrid initialized={flexInitialized} formatItem={formatFlexGrid} itemsSource={view}/> </main>); } const container = document.getElementById('app'); if (container) { const root = ReactDOM.createRoot(container); root.render(<App />); }
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>MESCIUS Wijmo Wijmo FlexGrid Keyboard Events</title> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <!-- SystemJS --> <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.40/system.src.js" integrity="sha512-G6mEj6h18+m3MvzdviSDfPle/TfH0//cXcB33AKlNR/Rha0yQsKefDZKRTkIZos97HEGq2JMV1RT5ybMoQ3WsQ==" crossorigin="anonymous"></script> <script src="systemjs.config.js"></script> <script> System.import('./src/app'); </script> </head> <body> <div id="app"></div> </body> </html>
.wj-flexgrid { max-height: 220px; } #log { font-style: italic; text-align: center; margin-bottom: 10px; color: #000; } .my-button { opacity: 0.5; margin: 0 6px; } .my-button:hover { color: orange; }
function getData() { let countries = ['US', 'Germany', 'UK', 'Japan'], data = []; for (let i = 0; i < 20; i++) { data.push({ id: i, country: countries[i % countries.length], sales: Math.random() * 10000, expenses: Math.random() * 5000, overdue: i % 4 == 0 }); } return data; } export const data = getData();
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'systemjs-babel-build':'npm:systemjs-plugin-babel/systemjs-babel-browser.js', "react-use-event-hook": "npm:react-use-event-hook/dist/esm/useEvent.js", }, // packages tells the System loader how to load when no filename and/or no extension packages: { src: { defaultExtension: 'jsx' }, "node_modules": { defaultExtension: 'js' }, } }); })(this);