Custom Cell Content (React)

The FlexGrid provides a powerful infrastructure for binding cells to data and formatting the cells using CSS. But in some cases that may not be enough. In those situations, use the formatItem event to customize the style or the content presented in each cell. The grid below uses formatItem to format cells with star ratings and sparklines.

This example uses React.

import 'bootstrap.css'; import '@grapecity/wijmo.styles/wijmo.css'; import './app.css'; // import * as React from 'react'; import * as ReactDOM from 'react-dom'; import * as wjGrid from '@grapecity/wijmo.react.grid'; class App extends React.Component { constructor(props) { super(props); this.state = { data: this. getData() }; } render() { return <div className="container-fluid"> <wjGrid.FlexGrid isReadOnly={true} allowResizing="None" alternatingRowStep={1} initialized={this.initializeGrid.bind(this)} itemsSource={this.state.data}> <wjGrid.FlexGridColumn binding="rank" header="#" width={50}></wjGrid.FlexGridColumn> <wjGrid.FlexGridColumn binding="title" header="Title" width="2*"></wjGrid.FlexGridColumn> <wjGrid.FlexGridColumn binding="rating" header="Rating" width="*" align="center" cssClass="cell-rating"></wjGrid.FlexGridColumn> <wjGrid.FlexGridColumn binding="attendance" header="Attendance" width="2*" cssClass="cell-attendance"></wjGrid.FlexGridColumn> <wjGrid.FlexGridColumn binding="revenue" header="Revenue" width="2*" cssClass="cell-revenue"></wjGrid.FlexGridColumn> </wjGrid.FlexGrid> </div>; } initializeGrid(flex) { flex.formatItem.addHandler((s, e) => { if (e.panel == s.cells) { var item = s.rows[e.row].dataItem; switch (s.columns[e.col].binding) { case "rating": this._formatRatingCell(e.cell, item.rating); break; case "attendance": this._formatAttendanceCell(e.cell, item.attendance); break; case "revenue": this._formatRevenueCell(e.cell, item.revenue); break; } } }); } _formatRatingCell(cell, rating) { let html = '<div aria-label="rating:' + rating + ' stars">'; for (let i = 0; i < rating; i++) { html += '<span class="glyphicon glyphicon-star"></span>'; } html += "</div>"; cell.innerHTML = html; } _formatAttendanceCell(cell, data) { cell.innerHTML = this._getSparklines(data); } _formatRevenueCell(cell, data) { cell.innerHTML = this._getSparkbars(data); } // generate sparklines as SVG _getSparklines(data) { let svg = "", min = Math.min.apply(Math, data), max = Math.max.apply(Math, data), x1 = 0, y1 = this._scaleY(data[0], min, max), x2, y2; for (let i = 1; i < data.length; i++) { x2 = Math.round((i / (data.length - 1)) * 100); y2 = this._scaleY(data[i], min, max); svg += "<line x1=" + x1 + "% y1=" + y1 + "% x2=" + x2 + "% y2=" + y2 + "% />"; x1 = x2; y1 = y2; } return this._wrapSvg(svg, "sparklines"); } _getSparkbars(data) { let svg = "", min = Math.min.apply(Math, data), max = Math.max.apply(Math, data), base = Math.min(max, Math.max(min, 0)), basey = this._scaleY(base, min, max), w = Math.round(100 / data.length) - 2, x, y; for (let i = 0; i < data.length; i++) { x = i * Math.round(100 / data.length) + 1; y = this._scaleY(data[i], min, max); svg += "<rect x=" + x + "% width=" + w + "% y=" + Math.min(y, basey) + "% height=" + Math.abs(y - basey) + "% />"; } svg += "<rect x=0% width=100% height=1 y=" + basey + "% opacity=.5 />"; return this._wrapSvg(svg, "sparkbars"); } _scaleY(value, min, max) { return 100 - Math.round(((value - min) / (max - min)) * 100); } _wrapSvg(svg, title) { return ('<div aria-label="' + title + '" ' + 'style="width:100%;height:100%;box-sizing:border-box;padding:4px">' + '<svg width="100%" height="100%" style="stroke:currentColor;"><g>' + svg + "</g></svg></div>"); } getData() { return [ { rank: 1, title: "The Wizard of Oz", rating: 4, attendance: this._getArr(40), revenue: this._getArr(20) }, { rank: 2, title: "Citizen Kane", rating: 5, attendance: this._getArr(40), revenue: this._getArr(20) }, { rank: 3, title: "The Godfather", rating: 5, attendance: this._getArr(40), revenue: this._getArr(20) }, { rank: 4, title: "Metropolis", rating: 4, attendance: this._getArr(40), revenue: this._getArr(20) }, { rank: 5, title: "Singing' in the Rain", rating: 2, attendance: this._getArr(40), revenue: this._getArr(20) }, { rank: 6, title: "Casablanca", rating: 3, attendance: this._getArr(40), revenue: this._getArr(20) }, { rank: 7, title: "Alien", rating: 5, attendance: this._getArr(40), revenue: this._getArr(20) }, { rank: 8, title: "Vertigo", rating: 2, attendance: this._getArr(40), revenue: this._getArr(20) }, { rank: 9, title: "Gone with the Wind", rating: 4, attendance: this._getArr(40), revenue: this._getArr(20) }, { rank: 10, title: "Chinatown", rating: 2, attendance: this._getArr(40), revenue: this._getArr(20) } ]; } _getArr(len) { let arr = []; for (let i = 0; i < len; i++) { arr.push(Math.round(Math.random() * 100)); } return arr; } } ReactDOM.render(<App />, document.getElementById('app'));
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>GrapeCity Wijmo FlexGrid Column Collections</title> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <!-- SystemJS --> <script src="node_modules/systemjs/dist/system.src.js"></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 0; } .cell-rating { color: gold; } .cell-attendance:not(.wj-state-selected):not(.wj-state-multi-selected), .cell-revenue:not(.wj-state-selected):not(.wj-state-multi-selected){ color: blue; } body { margin-bottom: 20px; }
(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', '@grapecity/wijmo': 'npm:@grapecity/wijmo/index.js', '@grapecity/wijmo.input': 'npm:@grapecity/wijmo.input/index.js', '@grapecity/wijmo.styles': 'npm:@grapecity/wijmo.styles', '@grapecity/wijmo.cultures': 'npm:@grapecity/wijmo.cultures', '@grapecity/wijmo.chart': 'npm:@grapecity/wijmo.chart/index.js', '@grapecity/wijmo.chart.analytics': 'npm:@grapecity/wijmo.chart.analytics/index.js', '@grapecity/wijmo.chart.animation': 'npm:@grapecity/wijmo.chart.animation/index.js', '@grapecity/wijmo.chart.annotation': 'npm:@grapecity/wijmo.chart.annotation/index.js', '@grapecity/wijmo.chart.finance': 'npm:@grapecity/wijmo.chart.finance/index.js', '@grapecity/wijmo.chart.finance.analytics': 'npm:@grapecity/wijmo.chart.finance.analytics/index.js', '@grapecity/wijmo.chart.hierarchical': 'npm:@grapecity/wijmo.chart.hierarchical/index.js', '@grapecity/wijmo.chart.interaction': 'npm:@grapecity/wijmo.chart.interaction/index.js', '@grapecity/wijmo.chart.radar': 'npm:@grapecity/wijmo.chart.radar/index.js', '@grapecity/wijmo.chart.render': 'npm:@grapecity/wijmo.chart.render/index.js', '@grapecity/wijmo.gauge': 'npm:@grapecity/wijmo.gauge/index.js', '@grapecity/wijmo.grid': 'npm:@grapecity/wijmo.grid/index.js', '@grapecity/wijmo.grid.detail': 'npm:@grapecity/wijmo.grid.detail/index.js', '@grapecity/wijmo.grid.filter': 'npm:@grapecity/wijmo.grid.filter/index.js', '@grapecity/wijmo.grid.search': 'npm:@grapecity/wijmo.grid.search/index.js', '@grapecity/wijmo.grid.grouppanel': 'npm:@grapecity/wijmo.grid.grouppanel/index.js', '@grapecity/wijmo.grid.multirow': 'npm:@grapecity/wijmo.grid.multirow/index.js', '@grapecity/wijmo.grid.transposed': 'npm:@grapecity/wijmo.grid.transposed/index.js', '@grapecity/wijmo.grid.pdf': 'npm:@grapecity/wijmo.grid.pdf/index.js', '@grapecity/wijmo.grid.sheet': 'npm:@grapecity/wijmo.grid.sheet/index.js', '@grapecity/wijmo.grid.xlsx': 'npm:@grapecity/wijmo.grid.xlsx/index.js', '@grapecity/wijmo.grid.selector': 'npm:@grapecity/wijmo.grid.selector/index.js', '@grapecity/wijmo.grid.cellmaker': 'npm:@grapecity/wijmo.grid.cellmaker/index.js', '@grapecity/wijmo.grid.immutable': 'npm:@grapecity/wijmo.grid.immutable/index.js', '@grapecity/wijmo.nav': 'npm:@grapecity/wijmo.nav/index.js', '@grapecity/wijmo.odata': 'npm:@grapecity/wijmo.odata/index.js', '@grapecity/wijmo.olap': 'npm:@grapecity/wijmo.olap/index.js', '@grapecity/wijmo.pdf': 'npm:@grapecity/wijmo.pdf/index.js', '@grapecity/wijmo.viewer': 'npm:@grapecity/wijmo.viewer/index.js', '@grapecity/wijmo.xlsx': 'npm:@grapecity/wijmo.xlsx/index.js', '@grapecity/wijmo.undo': 'npm:@grapecity/wijmo.undo/index.js', '@grapecity/wijmo.interop.grid': 'npm:@grapecity/wijmo.interop.grid/index.js', "@grapecity/wijmo.react.chart.analytics": "npm:@grapecity/wijmo.react.chart.analytics/index.js", "@grapecity/wijmo.react.chart.animation": "npm:@grapecity/wijmo.react.chart.animation/index.js", "@grapecity/wijmo.react.chart.annotation": "npm:@grapecity/wijmo.react.chart.annotation/index.js", "@grapecity/wijmo.react.chart.finance.analytics": "npm:@grapecity/wijmo.react.chart.finance.analytics/index.js", "@grapecity/wijmo.react.chart.finance": "npm:@grapecity/wijmo.react.chart.finance/index.js", "@grapecity/wijmo.react.chart.hierarchical": "npm:@grapecity/wijmo.react.chart.hierarchical/index.js", "@grapecity/wijmo.react.chart.interaction": "npm:@grapecity/wijmo.react.chart.interaction/index.js", "@grapecity/wijmo.react.chart.radar": "npm:@grapecity/wijmo.react.chart.radar/index.js", "@grapecity/wijmo.react.chart": "npm:@grapecity/wijmo.react.chart/index.js", "@grapecity/wijmo.react.core": "npm:@grapecity/wijmo.react.core/index.js", "@grapecity/wijmo.react.gauge": "npm:@grapecity/wijmo.react.gauge/index.js", "@grapecity/wijmo.react.grid.detail": "npm:@grapecity/wijmo.react.grid.detail/index.js", "@grapecity/wijmo.react.grid.filter": "npm:@grapecity/wijmo.react.grid.filter/index.js", "@grapecity/wijmo.react.grid.grouppanel": "npm:@grapecity/wijmo.react.grid.grouppanel/index.js", '@grapecity/wijmo.react.grid.search': 'npm:@grapecity/wijmo.react.grid.search/index.js', "@grapecity/wijmo.react.grid.multirow": "npm:@grapecity/wijmo.react.grid.multirow/index.js", "@grapecity/wijmo.react.grid.sheet": "npm:@grapecity/wijmo.react.grid.sheet/index.js", '@grapecity/wijmo.react.grid.transposed': 'npm:@grapecity/wijmo.react.grid.transposed/index.js', '@grapecity/wijmo.react.grid.immutable': 'npm:@grapecity/wijmo.react.grid.immutable/index.js', "@grapecity/wijmo.react.grid": "npm:@grapecity/wijmo.react.grid/index.js", "@grapecity/wijmo.react.input": "npm:@grapecity/wijmo.react.input/index.js", "@grapecity/wijmo.react.olap": "npm:@grapecity/wijmo.react.olap/index.js", "@grapecity/wijmo.react.viewer": "npm:@grapecity/wijmo.react.viewer/index.js", "@grapecity/wijmo.react.nav": "npm:@grapecity/wijmo.react.nav/index.js", "@grapecity/wijmo.react.base": "npm:@grapecity/wijmo.react.base/index.js", 'jszip': 'npm:jszip/dist/jszip.js', 'react': 'npm:react/umd/react.production.min.js', 'react-dom': 'npm:react-dom/umd/react-dom.production.min.js', 'redux': 'npm:redux/dist/redux.min.js', 'react-redux': 'npm:react-redux/dist/react-redux.min.js', 'bootstrap.css': 'npm:bootstrap/dist/css/bootstrap.min.css', 'css': 'npm:systemjs-plugin-css/css.js', 'plugin-babel': 'npm:systemjs-plugin-babel/plugin-babel.js', 'systemjs-babel-build':'npm:systemjs-plugin-babel/systemjs-babel-browser.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);