Header Merging (Angular)

The FlexGrid supports content-driven cell merging in column header cells. This is accomplished by adding another row object to the columnHeaders panel of the grid and then merging the desired cells.

Learn about FlexGrid | FlexGrid API Reference

This example uses Angular.

import 'bootstrap.css'; import '@grapecity/wijmo.styles/wijmo.css'; import './styles.css'; // import * as wjCore from '@grapecity/wijmo'; import * as wjGrid from '@grapecity/wijmo.grid'; import { Component, Inject, enableProdMode, NgModule } from '@angular/core'; import { platformBrowserDynamic } from '@angular/platform-browser-dynamic'; import { BrowserModule } from '@angular/platform-browser'; import { WjGridModule } from '@grapecity/wijmo.angular2.grid'; import { DataService, DataItem } from './app.data'; // @Component({ selector: 'app-component', templateUrl: 'src/app.component.html' }) export class AppComponent { data: DataItem[]; // DataSvc will be passed by derived classes constructor(@Inject(DataService) private dataService: DataService) { this.data = dataService.getData(); } // onInitialized(grid: wjGrid.FlexGrid) { // create extra header row var extraRow = new wjGrid.Row(); extraRow.allowMerging = true; // // add extra header row to the grid var panel = grid.columnHeaders; panel.rows.splice(0, 0, extraRow); // // populate the extra header row for (let colIndex = 1; colIndex <= 2; colIndex++) { panel.setCellData(0, colIndex, 'Amounts'); } // // merge "Country" and "Active" headers vertically ['country', 'active'].forEach(function (binding) { let col = grid.getColumn(binding); col.allowMerging = true; panel.setCellData(0, col.index, col.header); }); // // center-align merged header cells grid.formatItem.addHandler(function (s: wjGrid.FlexGrid, e: wjGrid.FormatItemEventArgs) { if (e.panel == s.columnHeaders && e.range.rowSpan > 1) { var html = e.cell.innerHTML; e.cell.innerHTML = '<div class="v-center">' + html + '</div>'; } }); } } //\\ @NgModule({ imports: [WjGridModule, BrowserModule], declarations: [AppComponent], providers: [DataService], bootstrap: [AppComponent] }) export class AppModule { } // enableProdMode(); // Bootstrap application with hash style navigation and global services. platformBrowserDynamic().bootstrapModule(AppModule);
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>GrapeCity Wijmo FlexGrid Header Merging</title> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <!-- Polyfills --> <script src="node_modules/core-js/client/shim.min.js"></script> <script src="node_modules/zone.js/dist/zone.min.js"></script> <!-- SystemJS --> <script src="node_modules/systemjs/dist/system.js"></script> <script src="systemjs.config.js"></script> <script> // workaround to load 'rxjs/operators' from the rxjs bundle System.import('rxjs').then(function (m) { System.set(SystemJS.resolveSync('rxjs/operators'), System.newModule(m.operators)); System.import('./src/app.component'); }); </script> </head> <body> <app-component></app-component> </body> </html>
<div class="container-fluid"> <wj-flex-grid #grid [itemsSource]="data" [allowMerging]="'ColumnHeaders'" [alternatingRowStep]="0" [autoGenerateColumns]="false" (initialized)="onInitialized(grid)"> <wj-flex-grid-column [binding]="'country'" [header]="'Country'" [allowMerging]=true></wj-flex-grid-column> <wj-flex-grid-column [binding]="'sales'" [header]="'Sales'" [format]="'n2'"></wj-flex-grid-column> <wj-flex-grid-column [binding]="'expenses'" [header]="'Expenses'" [format]="'n2'"></wj-flex-grid-column> <wj-flex-grid-column [binding]="'active'" [header]="'Active'" [allowMerging]=true></wj-flex-grid-column> </wj-flex-grid> </div>
import { Injectable } from '@angular/core'; export interface DataItem { id: number; country: string; active: boolean; downloads: number; sales: number; expenses: number; } @Injectable() export class DataService { getData(): DataItem[] { var countries = 'US,Germany,UK,Japan'.split(','); var data = []; for (var i = 0; i < 20; i++) { data.push({ id: i, country: countries[i % countries.length], active: i % 5 != 0, downloads: Math.round(Math.random() * 200000), sales: Math.random() * 100000, expenses: Math.random() * 50000 }); } return data; } }
.wj-flexgrid { max-height: 200px; margin-bottom: 12px; } .wj-cell .v-center { position: relative; top: 50%; transform: translateY(-50%); white-space: pre-wrap; } body { margin-bottom: 24px; }
(function (global) { System.config({ transpiler: 'ts', typescriptOptions: { tsconfig: true }, meta: { 'typescript': { "exports": "ts" }, '*.css': { loader: 'css' } }, paths: { // paths serve as alias 'npm:': 'node_modules/' }, // map tells the System loader where to look for things map: { 'core-js': 'npm:core-js/client/shim.min.js', 'zone': 'npm:zone.js/dist/zone.min.js', //'reflect-metadata': 'npm:reflect-metadata/Reflect.js', 'rxjs': 'npm:rxjs/bundles/rxjs.umd.min.js', //'rxjs': 'npm:rxjs', //'rxjs/operators': 'npm:rxjs/operators', '@angular/core': 'npm:@angular/core/bundles/core.umd.min.js', '@angular/common': 'npm:@angular/common/bundles/common.umd.min.js', '@angular/compiler': 'npm:@angular/compiler/bundles/compiler.umd.min.js', '@angular/platform-browser': 'npm:@angular/platform-browser/bundles/platform-browser.umd.min.js', '@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic/bundles/platform-browser-dynamic.umd.min.js', '@angular/http': 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extension packages: { src: { defaultExtension: 'ts' }, rxjs: { defaultExtension: 'js' }, // 'rxjs': {main: 'index.js', defaultExtension: 'js' }, // 'rxjs/ajax': {main: 'index.js', defaultExtension: 'js' }, //'rxjs/operators': {main: 'index.js', defaultExtension: 'js' }, // 'rxjs/testing': {main: 'index.js', defaultExtension: 'js' }, // 'rxjs/webSocket': {main: 'index.js', defaultExtension: 'js' }, "node_modules": { defaultExtension: 'js' }, wijmo: { defaultExtension: 'js', } } }); })(this);