Hierarchical Fields

Pivot fields often have a hierarchical structure. For example, an address may be represented by street, city, and country fields. Or you may want to break up a date into year, quarter, and month.

You can represent hierarchical structures by grouping the subordinate fields under a subFields array of a master field. In this example, we use this feature to group measure and dimension fields under different master fields, and also to break up a date field into year, quarter, and month sub-fields (the date fields share the same binding but have different formats).

import 'bootstrap.css'; import '@grapecity/wijmo.styles/wijmo.css'; import './styles.css'; import '@grapecity/wijmo.touch'; // support drag/drop on touch devices import { PivotEngine, PivotPanel, PivotGrid } from '@grapecity/wijmo.olap'; import { getData } from './data'; document.readyState === 'complete' ? init() : window.onload = init; function init() { // initialize pivot engine var ng = new PivotEngine({ autoGenerateFields: false, fields: [ { header: 'Dimensions', subFields: [ { header: 'Buyer', binding: 'buyer' }, { header: 'Type', binding: 'type' }, { header: 'Date', subFields: [ { header: 'Year', binding: 'date', format: 'yyyy' }, { header: 'Quarter', binding: 'date', format: '"Q"Q' }, { header: 'Month', binding: 'date', format: 'MMM' }, ] } ] }, { header: 'Measures', subFields: [ { header: 'Amount', binding: 'amount', format: 'c0' } ] } ], valueFields: ['Amount'], rowFields: ['Year', 'Quarter'], columnFields: ['Buyer'], showRowTotals: 'Subtotals', itemsSource: getData(), }); // show pivot panel new PivotPanel('#pivotPanel', { itemsSource: ng }); // show pivot grid new PivotGrid('#pivotGrid', { itemsSource: ng }); }
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>Grapecity Wijmo OLAP Hierarchical Fields</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 class="row"> <div class="col-xs-4"> <div id="pivotPanel"></div> </div> <div class="col-xs-8"> <div id="pivotGrid"></div> </div> </div> </body> </html>
export function getData() { let data = [], buyers = 'Mom,Dad,Kelly,Bob'.split(','), types = 'Fuel,Food,Sports,Books,Music,Tickets'.split(','), yr = new Date().getFullYear(); for (let i = 0; i < 1000; i++) { data.push({ date: new Date(yr, -Math.random() * 36), buyer: pickOne(buyers), type: pickOne(types), amount: Math.round(Math.random() * 500 + 10) }); } return data; } function pickOne(arr) { return arr[Math.floor(Math.random() * arr.length)]; }
.wj-pivotpanel { background: #eee; box-shadow: 0 10px 20px rgba(0, 0, 0, 0.19), 0 6px 6px rgba(0, 0, 0, 0.23); } .wj-pivotpanel .wj-flexgrid { background: inherit; max-height: 300px; }
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