Conditional Styling

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 calculate and format cells that show the difference between values in the current and previous items:

import 'bootstrap.css'; import '@grapecity/wijmo.styles/wijmo.css'; import './styles.css'; import { Globalize } from '@grapecity/wijmo'; import { FlexGrid, Row, AllowMerging } from '@grapecity/wijmo.grid'; document.readyState === 'complete' ? init() : window.onload = init; function init() { // generate some random data var countries = 'US,Germany,UK,Japan,Italy,Greece'.split(','), data = []; for (var i = 0; i < 200; i++) { data.push({ id: i, country: countries[i % countries.length], sales: Math.random() * 10000, expenses: Math.random() * 5000, }); } // show data in a grid var theGrid = new FlexGrid('#theGrid', { isReadOnly: true, allowResizing: 'None', allowDragging: 'None', allowSorting: false, selectionMode: 'RowRange', alternatingRowStep: 0, autoGenerateColumns: false, columns: [ { binding: 'id', header: 'ID', width: 50 }, { binding: 'country', header: 'Country' }, { binding: 'sales', header: 'Sales', width: 80, format: 'n0' }, { binding: 'salesDiff', header: 'Diff', dataType: 'Number', width: 80, format: 'p0' }, { binding: 'expenses', header: 'Expenses', width: 80, format: 'n0' }, { binding: 'expensesDiff', header: 'Diff', dataType: 'Number', width: 80, format: 'p0' } ], itemsSource: data, }); // insert extra column header row var ch = theGrid.columnHeaders, hr = new Row(); ch.rows.insert(0, hr); // fill out headings in extra header row for (var i = 0; i < theGrid.columns.length; i++) { var hdr = ch.getCellData(1, i, false); if (hdr == 'Diff') hdr = ch.getCellData(1, i - 1, false); ch.setCellData(0, i, hdr); } // allow merging across and down extra header row theGrid.allowMerging = AllowMerging.ColumnHeaders; hr.allowMerging = true; theGrid.columns[0].allowMerging = true; theGrid.columns[1].allowMerging = true; // custom rendering for headers and "Diff" columns theGrid.formatItem.addHandler(function (s, e) { // center-align column headers if (e.panel == s.columnHeaders) { e.cell.innerHTML = '<div class="v-center">' + e.cell.innerHTML + '</div>'; } // custom rendering for "Diff" columns if (e.panel == s.cells) { var col = s.columns[e.col]; if (e.row > 0 && (col.binding == 'salesDiff' || col.binding == 'expensesDiff')) { var vnow = s.getCellData(e.row, e.col - 1), vprev = s.getCellData(e.row - 1, e.col - 1), diff = (vnow / vprev) - 1; // format the cell var html = '<div class="diff-{cls}">' + '<span style="font-size:75%">{val}</span> ' + '<span style="font-size:120%" class="wj-glyph-{glyph}"></span>'; html = html.replace('{val}', Globalize.format(diff, col.format)); if (diff < 0.01) { html = html.replace('{cls}', 'down').replace('{glyph}', 'down'); } else if (diff > 0.01) { html = html.replace('{cls}', 'up').replace('{glyph}', 'up'); } else { html = html.replace('{cls}', 'none').replace('{glyph}', 'circle'); } e.cell.innerHTML = html; } } }); }
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>GrapeCity Wijmo FlexGrid Conditional Styling</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 class="container-fluid"> <div id="theGrid"> </div> </div> </body> </html>
.wj-flexgrid { max-height: 250px; margin: 10px 0; } .wj-cell .v-center { position: relative; top: 50%; transform: translateY(-50%); white-space: pre-wrap; } .wj-cell:not(.wj-state-selected):not(.wj-state-multi-selected) .diff-none { color: #d8b400; } .wj-cell:not(.wj-state-selected):not(.wj-state-multi-selected) .diff-up { color: #4c8f00; } .wj-cell:not(.wj-state-selected):not(.wj-state-multi-selected) .diff-down { color: #9f0000; } body { margin-bottom: 20px; }
(function (global) { System.config({ transpiler: 'plugin-babel', babelOptions: { es2015: 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.chart.webgl': 'npm:@grapecity/wijmo.chart.webgl/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.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.touch': 'npm:@grapecity/wijmo.touch/index.js', '@grapecity/wijmo.cloud': 'npm:@grapecity/wijmo.cloud/index.js', 'jszip': 'npm:jszip/dist/jszip.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: 'js' }, "node_modules": { defaultExtension: 'js' }, } }); })(this);