Custom Merging (React)

By default, FlexGrid applies merging to cells based on their content.

In some cases, you may want to use different strategies for merging. You can achieve this by defining a class that extends the wijmo.grid.MergeManager class and assigning an object of that type to the grid's mergeManager property.

Learn about FlexGrid | Custom Merging Documentation | FlexGrid API Reference

This example uses React.

import "@grapecity/wijmo.styles/wijmo.css"; import "bootstrap.css"; import "./app.css"; // import * as React from 'react'; import * as ReactDOM from 'react-dom'; // import * as wjCore from "@grapecity/wijmo"; import * as wjcGrid from "@grapecity/wijmo.react.grid"; import * as wjGrid from '@grapecity/wijmo.grid'; class App extends React.Component { constructor(props) { super(props); } render() { return <div className="container-fluid"> <wjcGrid.FlexGrid initialized={this.onInitialized.bind(this)}> </wjcGrid.FlexGrid> </div>; } onInitialized(flexGrid) { while (flexGrid.columns.length < 7) { flexGrid.columns.push(new wjGrid.Column()); } while (flexGrid.rows.length < 5) { flexGrid.rows.push(new wjGrid.Row()); } // configure the grid flexGrid.mergeManager = new CustomMergeManager(); flexGrid.formatItem.addHandler(this.centerCell); flexGrid.rowHeaders.columns[0].width = 80; flexGrid.rows.defaultSize = 40; flexGrid.alternatingRowStep = 0; flexGrid.isReadOnly = true; // populate the grid this.setData(flexGrid.columnHeaders, 0, ",Monday,Tuesday,Wednesday,Thursday,Friday,Saturday,Sunday".split(",")); this.setData(flexGrid.cells, 0, "12:00,Walker,Morning Show,Morning Show,Sport,Weather,N/A,N/A".split(",")); this.setData(flexGrid.cells, 1, "13:00,Today Show,Today Show,Sesame Street,Football,Market Watch,N/A,N/A".split(",")); this.setData(flexGrid.cells, 2, "14:00,Today Show,Today Show,Kid Zone,Football,Soap Opera,N/A,N/A".split(",")); this.setData(flexGrid.cells, 3, "15:00,News,News,News,News,News,N/A,N/A".split(",")); this.setData(flexGrid.cells, 4, "16:00,News,News,News,News,News,N/A,N/A".split(",")); } setData(p, r, cells) { if (p.cellType == wjGrid.CellType.Cell) { p.grid.rowHeaders.setCellData(r, 0, cells[0]); } for (var i = 1; i < cells.length; i++) { p.setCellData(r, i - 1, cells[i]); } } centerCell(s, e) { if (e.cell.children.length == 0) { e.cell.innerHTML = "<div>" + e.cell.innerHTML + "</div>"; wjCore.setCss(e.cell, { display: "table", tableLayout: "fixed" }); wjCore.setCss(e.cell.children[0], { display: "table-cell", textAlign: "center", verticalAlign: "middle" }); } } } class CustomMergeManager extends wjGrid.MergeManager { getMergedRange(panel, r, c, clip = true) { // // create basic cell range var rng = new wjGrid.CellRange(r, c); // // expand left/right for (var i = rng.col; i < panel.columns.length - 1; i++) { if (panel.getCellData(rng.row, i, true) != panel.getCellData(rng.row, i + 1, true)) break; rng.col2 = i + 1; } for (var i = rng.col; i > 0; i--) { if (panel.getCellData(rng.row, i, true) != panel.getCellData(rng.row, i - 1, true)) break; rng.col = i - 1; } // // expand up/down for (var i = rng.row; i < panel.rows.length - 1; i++) { if (panel.getCellData(i, rng.col, true) != panel.getCellData(i + 1, rng.col, true)) break; rng.row2 = i + 1; } for (var i = rng.row; i > 0; i--) { if (panel.getCellData(i, rng.col, true) != panel.getCellData(i - 1, rng.col, true)) break; rng.row = i - 1; } // // done return rng; } } 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 Custom 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 id="app"></div> </body> </html>
.wj-flexgrid { margin-bottom: 12px; } body { margin-bottom: 24px; }
(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': 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'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);