Selection (React)

By default, the FlexGrid control allows you to select a range of cells with the mouse or keyboard, just like Excel. The selectionMode property allows you to change that so that users are restricted to selecting rows, row ranges, non-contiguous rows (like in a list-box), single cells, or nothing at all.

Learn about FlexGrid | Selection Modes Documentation | FlexGrid API Reference

This example uses React.

import 'bootstrap.css'; import '@mescius/wijmo.styles/wijmo.css'; import ReactDOM from 'react-dom/client'; import React, { useRef, useState } from 'react'; import useEvent from 'react-use-event-hook'; import * as wjcCore from '@mescius/wijmo'; import * as wjcGrid from '@mescius/wijmo.react.grid'; import * as wjGrid from '@mescius/wijmo.grid'; import * as wjcInput from '@mescius/wijmo.react.input'; import './app.css'; import { data } from './data'; function App() { const [state, setState] = useState({ comboBoxData: ['None', 'Cell', 'CellRange', 'Row', 'RowRange', 'ListBox'], currentSelection: null, currentComboText: "CellRange" }); const comboRef = useRef(null); const flexGridRef = useRef(null); const initCombo = useEvent((combo) => { comboRef.current = combo; }); const initializeGrid = useEvent((flexGrid) => { flexGridRef.current = flexGrid; flexGrid.onSelectionChanged(null); }); const onTextChanged = useEvent(() => { flexGridRef.current.selectionMode = wjcCore.asEnum(comboRef.current.selectedIndex, wjGrid.SelectionMode); setState((prevState) => (Object.assign(Object.assign({}, prevState), { currentComboText: wjcCore.asEnum(comboRef.current.selectedIndex, wjGrid.SelectionMode) }))); }); const onSelectionChanged = useEvent(() => { setState((prevState) => (Object.assign(Object.assign({}, prevState), { currentSelection: wjcCore.format("({row},{col})-({row2},{col2})", flexGridRef.current.selection) }))); }); const onRefreshClick = () => { flexGridRef.current.collectionView.refresh(); }; const onSelectClick = () => { comboRef.current.text = "CellRange"; flexGridRef.current.selection = new wjGrid.CellRange(0, 0, 1, 1); }; const onListSelectClick = () => { comboRef.current.text = "ListBox"; flexGridRef.current.select(0, 0); [0, 2, 4].forEach((index) => { flexGridRef.current.rows[index].isSelected = true; }); }; return (<div className="container-fluid"> <label>selectionMode{' '}<span id="selectionMode"></span> <wjcInput.ComboBox initialized={initCombo} itemsSource={state.comboBoxData} text={state.currentComboText} textChanged={onTextChanged}/> </label> <wjcGrid.FlexGrid alternatingRowStep={0} itemsSource={data} initialized={initializeGrid} selectionChanged={onSelectionChanged}/> <p> Current selection: <span id="currSel">{state.currentSelection}</span>. </p> <div> <button className="btn btn-default" onClick={onSelectClick}>Select the first four cells</button> <button className="btn btn-default" onClick={onListSelectClick}>Select rows 0, 2, and 4</button> </div> </div>); } 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 Selection Overview</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: 250px; margin: 10px; } #currSel { font-weight: bold; }
function getData() { var countries = ['US', 'Germany', 'UK', 'Japan', 'Italy', 'Greece'], data = []; for (var i = 0; i < countries.length; i++) { data.push({ country: countries[i], downloads: Math.round(Math.random() * 20000), sales: Math.random() * 10000, expenses: Math.random() * 5000 }); } return data; } export const data = getData();
(function (global) { System.config({ transpiler: 'plugin-babel', babelOptions: { es2015: true, react: true }, meta: { '*.css': { loader: 'css' } }, paths: { // paths serve as alias 'npm:': 'node_modules/' }, // map tells the System loader where to look for things map: { 'jszip': 'npm:jszip/dist/jszip.js', '@mescius/wijmo': 'npm:@mescius/wijmo/index.js', '@mescius/wijmo.input': 'npm:@mescius/wijmo.input/index.js', '@mescius/wijmo.styles': 'npm:@mescius/wijmo.styles', '@mescius/wijmo.cultures': 'npm:@mescius/wijmo.cultures', '@mescius/wijmo.chart': 'npm:@mescius/wijmo.chart/index.js', '@mescius/wijmo.chart.analytics': 'npm:@mescius/wijmo.chart.analytics/index.js', '@mescius/wijmo.chart.animation': 'npm:@mescius/wijmo.chart.animation/index.js', '@mescius/wijmo.chart.annotation': 'npm:@mescius/wijmo.chart.annotation/index.js', '@mescius/wijmo.chart.finance': 'npm:@mescius/wijmo.chart.finance/index.js', '@mescius/wijmo.chart.finance.analytics': 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'npm:@mescius/wijmo.grid.multirow/index.js', '@mescius/wijmo.grid.transposed': 'npm:@mescius/wijmo.grid.transposed/index.js', '@mescius/wijmo.grid.transposedmultirow': 'npm:@mescius/wijmo.grid.transposedmultirow/index.js', '@mescius/wijmo.grid.pdf': 'npm:@mescius/wijmo.grid.pdf/index.js', '@mescius/wijmo.grid.sheet': 'npm:@mescius/wijmo.grid.sheet/index.js', '@mescius/wijmo.grid.xlsx': 'npm:@mescius/wijmo.grid.xlsx/index.js', '@mescius/wijmo.grid.selector': 'npm:@mescius/wijmo.grid.selector/index.js', '@mescius/wijmo.grid.cellmaker': 'npm:@mescius/wijmo.grid.cellmaker/index.js', '@mescius/wijmo.grid.immutable': 'npm:@mescius/wijmo.grid.immutable/index.js', '@mescius/wijmo.touch': 'npm:@mescius/wijmo.touch/index.js', '@mescius/wijmo.cloud': 'npm:@mescius/wijmo.cloud/index.js', '@mescius/wijmo.nav': 'npm:@mescius/wijmo.nav/index.js', '@mescius/wijmo.odata': 'npm:@mescius/wijmo.odata/index.js', '@mescius/wijmo.olap': 'npm:@mescius/wijmo.olap/index.js', '@mescius/wijmo.rest': 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"@mescius/wijmo.react.grid.grouppanel": "npm:@mescius/wijmo.react.grid.grouppanel/index.js", '@mescius/wijmo.react.grid.search': 'npm:@mescius/wijmo.react.grid.search/index.js', "@mescius/wijmo.react.grid.multirow": "npm:@mescius/wijmo.react.grid.multirow/index.js", "@mescius/wijmo.react.grid.sheet": "npm:@mescius/wijmo.react.grid.sheet/index.js", '@mescius/wijmo.react.grid.transposed': 'npm:@mescius/wijmo.react.grid.transposed/index.js', '@mescius/wijmo.react.grid.transposedmultirow': 'npm:@mescius/wijmo.react.grid.transposedmultirow/index.js', '@mescius/wijmo.react.grid.immutable': 'npm:@mescius/wijmo.react.grid.immutable/index.js', "@mescius/wijmo.react.grid": "npm:@mescius/wijmo.react.grid/index.js", "@mescius/wijmo.react.input": "npm:@mescius/wijmo.react.input/index.js", "@mescius/wijmo.react.olap": "npm:@mescius/wijmo.react.olap/index.js", "@mescius/wijmo.react.viewer": "npm:@mescius/wijmo.react.viewer/index.js", "@mescius/wijmo.react.nav": 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"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);