Multi-Range Selection (Vue)

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 Vue.

<template> <div class="container-fluid"> <wj-flex-grid :alternatingRowStep="0" :showMarquee="true" :anchorCursor="true" :selectionMode="'MultiRange'" :showSelectedHeaders="'All'" :itemsSource="data" :selectionChanged="selectionChanged" :initialized="initialized"> </wj-flex-grid> <pre id="mr-aggregates">Ready</pre> <button class="btn btn-primary" @click="exportGridToCsv(false)"> Export Whole Grid </button> <button id="btn-csv-sel" class="btn btn-primary" @click="exportGridToCsv(true)"> Export Selection </button> </div> </template> <script> import "@grapecity/wijmo.styles/wijmo.css"; import 'bootstrap.css'; import Vue from 'vue'; import '@grapecity/wijmo.vue2.grid'; import { glbz, format, isNumber, saveFile } from '@grapecity/wijmo'; import { CellRange } from '@grapecity/wijmo.grid'; let App = Vue.extend({ name: 'app', data: function(){ return { data: this.getData(), grid: null } }, methods: { // create some random data getData: function() { 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; }, initialized: function(s) { this.grid = s; }, // update aggregates when selection changes selectionChanged: function() { // calculate aggregates let tally = { 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: function(tally, grid, ranges, index) { 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: function(selection) { let rng = selection ? null // selection plus extended selection : 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'); } } }) new Vue({ render: h => h(App) }).$mount('#app'); </script> <style> .wj-flexgrid { height: 300px; } </style>
<!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"> <!-- SystemJS --> <script src="node_modules/systemjs/dist/system.src.js"></script> <script src="systemjs.config.js"></script> <script> System.import('./src/app.vue'); </script> </head> <body> <div id="app"> </div> </body> </html>
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