Multi-Range Selection (Angular)

Set the FlexGrid's selectionMode property to MultiRange to enable Excel-style multi-range selection. Users will be able to select multiple ranges by ctrl-clicking and dragging on the grid.

The sample shows how you can provide Excel-style dynamic data summaries for the current selection (regular or multi-range) and how to export selected ranges to CSV files.

Note that clipboard and export commands only work for multi-range selections if all selected ranges refer to the same column range or to the same row range. (Excel also behaves this way.)

This example uses Angular.

import 'bootstrap.css'; import '@grapecity/wijmo.styles/wijmo.css'; import './styles.css'; import { Component, enableProdMode, NgModule, ViewChild } from '@angular/core'; import { platformBrowserDynamic } from '@angular/platform-browser-dynamic'; import { BrowserModule } from '@angular/platform-browser'; import { WjGridModule } from '@grapecity/wijmo.angular2.grid'; import { glbz, format, isNumber, saveFile } from '@grapecity/wijmo'; import { FlexGrid, CellRange } from '@grapecity/wijmo.grid'; // object used to compute range statistics interface ITally { cnt: number, cntAll: number, sum: number, avg: number }; @Component({ selector: 'app-component', templateUrl: 'src/app.component.html' }) export class AppComponent { data: any[]; // DataSvc will be passed by derived classes constructor() { this.data = this._getData(); } // reference to grid component @ViewChild('grid') grid: FlexGrid; // update aggregates when selection changes selectionChanged() { // calculate aggregates let tally: ITally = { cnt: 0, cntAll: 0, sum: 0, avg: 0 }, ranges = this.grid.selectedRanges; for (let i = 0; i < ranges.length; i++) { this.aggregateRange(tally, this.grid, ranges, i); } // update the display using template literals let msg = (tally.cnt > 1) ? glbz`Count: <b>${tally.cntAll}:n0</b>\tAverage: <b>${tally.avg}:g4\tSum: <b>${tally.sum}:g4</b>` : (tally.cntAll > 1) ? glbz`Count: <b>${tally.cntAll}:n0</b>` : 'Ready' // update the display using wijmo.format //let msg = (tally.cnt > 1) // ? format('Count: <b>{cntAll:n0}</b>\tAverage: <b>{avg:g4}</b>\tSum: <b>{sum:g4}</b>', tally) // : (tally.cntAll > 1) // ? format('Count: <b>{cntAll:n0}</b>', tally) // : 'Ready'; // show the result document.getElementById('mr-aggregates').innerHTML = msg; } // update aggregates for a range, accounting for overlapping ranges aggregateRange(tally: ITally, grid: FlexGrid, ranges: CellRange[], index: number) { let rng = ranges[index]; for (let r = rng.topRow; r <= rng.bottomRow; r++) { for (let c = rng.leftCol; c <= rng.rightCol; c++) { // account for overlapping ranges let overlapped = false; for (let i = 0; i < index && !overlapped; i++) { let rng = ranges[i]; if (rng.contains(r, c)) { overlapped = true; } } // tally non-overlapped cells if (!overlapped) { let data = grid.getCellData(r, c, false); if (isNumber(data)) { // handle numbers tally.cnt++; tally.sum += data; } if (data !== '' && data !== null) { // handle non-empty cells tally.cntAll++; } } } } tally.avg = tally.cnt > 0 ? tally.sum / tally.cnt : 0; } // export grid or selection to CSV exportGridToCsv(selection: boolean) { let rng = selection ? null // selection plus extended ranges : new CellRange(0, 0, this.grid.rows.length - 1, this.grid.columns.length - 1); let csv = this.grid.getClipString(rng, true, true); saveFile(csv, selection ? 'FlexGridSelection.csv' : 'FlexGrid.csv', 'text/csv'); } // create some random data private _getData() { let data = []; let countries = 'Austria,Belgium,Chile,Denmark,Finland,Japan,UK'.split(','); for (let i = 0; i < 300; i++) { data.push({ id: i, from: countries[i % countries.length], to: countries[(i + 1) % countries.length], sales: Math.random() * 10000, expenses: Math.random() * 5000, amount: Math.random() * 10000, extra: Math.random() * 10000, }); } return data; } } @NgModule({ imports: [WjGridModule, BrowserModule], declarations: [AppComponent], 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 Multiple Selection</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 [alternatingRowStep]="0" [showMarquee]="true" [anchorCursor]="true" [selectionMode]="'MultiRange'" [showSelectedHeaders]="'All'" [itemsSource]="data" (selectionChanged)="selectionChanged()"> </wj-flex-grid> <pre id="mr-aggregates">Ready</pre> <button class="btn btn-primary" (click)="exportGridToCsv(false)"> Export Whole Grid </button> &nbsp; <button id="btn-csv-sel" class="btn btn-primary" (click)="exportGridToCsv(true)"> Export Selection </button> </div>
.wj-flexgrid { max-height: 300px; } .extended-selection.wj-cell:not(.wj-header):not(.wj-group):not(.wj-state-selected):not(.wj-state-multi-selected) { color: white; background: #a47aff; } body { margin-bottom: 20px; }
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