Restricted Merging

By default, the FlexGrid control will merge cells that have the same content, regardless of the content of neighboring cells.

In this example, we use a custom merge manager that merges cells vertically only if the cells in the previous column contain the same value.

Learn about FlexGrid | FlexGrid API Reference

import 'bootstrap.css'; import '@grapecity/wijmo.styles/wijmo.css'; import './styles.css'; import * as wjGrid from '@grapecity/wijmo.grid'; import * as wjCore from '@grapecity/wijmo'; export class RestrictedMergeManager extends wjGrid.MergeManager { getMergedRange(p, r, c, clip = true) { // // create basic cell range var rng = null; // // start with single cell rng = new wjGrid.CellRange(r, c); var pcol = c > 0 ? c - 1 : c; // // get reference values to use for merging var val = p.getCellData(r, c, false); var pval = p.getCellData(r, pcol, false); // // expand up while (rng.row > 0 && p.getCellData(rng.row - 1, c, false) == val && p.getCellData(rng.row - 1, pcol, false) == pval) { rng.row--; } // // expand down while (rng.row2 < p.rows.length - 1 && p.getCellData(rng.row2 + 1, c, false) == val && p.getCellData(rng.row2 + 1, pcol, false) == pval) { rng.row2++; } // // don't bother with single-cell ranges if (rng.isSingleCell) { rng = null; } // // done return rng; } } // document.readyState === 'complete' ? init() : window.onload = init; // function init() { // // create some random data var countries = 'US,Germany,UK,Japan,Italy,Greece'.split(','), customers = 'Paul Smith,Susan Johnson'.split(','); let data = []; for (var i = 0; i < 12; i++) { data.push({ customer: customers[i % customers.length], country: countries[i % countries.length], downloads: Math.round(Math.random() * 20000), sales: Math.random() * 5000, expenses: Math.random() * 5000 }); } // // show the data in a grid var theGrid = new wjGrid.FlexGrid('#theGrid', { allowMerging: 'Cells', autoGenerateColumns: false, alternatingRowStep: 0, columns: [ { binding: 'country', header: 'Country', allowMerging: true }, { binding: 'customer', header: 'Customer', allowMerging: true }, { binding: 'downloads', header: 'Downloads' }, { binding: 'sales', header: 'Sales' }, { binding: 'expenses', header: 'Expenses' } ], itemsSource: new wjCore.CollectionView(data, { sortDescriptions: ['customer', 'country'] }) }); // apply the custom merge manager theGrid.mergeManager = new RestrictedMergeManager(); }
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>MESCIUS WijmoFlexGrid Restricted Merging</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: 300px; } body { margin-bottom: 24px; }
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