Sorting in the PivotGrid (React)

The PivotEngine automatically sorts Dimension fields when it generates data summaries. It does not sort Measure fields by default. Users may switch the sort direction by clicking the headers on any PivotGrid control attached to the engine, when the grid's allowSorting property is set to true. The PivotGrid control does not show dimension field sort setting by default, but you can set the showRowFieldSort property to true if you want that feature.

Learn about OLAP | PivotGrid Sorting Documentation | PivotGrid API Reference

This example uses React.

import 'bootstrap.css'; import '@mescius/wijmo.styles/wijmo.css'; import ReactDOM from 'react-dom/client'; import React, { useRef } from 'react'; import useEvent from 'react-use-event-hook'; import '@mescius/wijmo.touch'; // support drag/drop on touch devices import * as Olap from '@mescius/wijmo.react.olap'; import * as wjInput from '@mescius/wijmo.react.input'; import * as wjcCore from '@mescius/wijmo'; import * as wjcOlap from '@mescius/wijmo.olap'; import './app.css'; import { getData } from './data'; const ng = new wjcOlap.PivotEngine({ itemsSource: getData(100), rowFields: ['Country', 'Product'], valueFields: ['Sales', 'Expenses'] }); const sortOptions = ['Ascending', 'Descending']; const sortOptions2 = ['None', 'Ascending', 'Descending']; function App() { const pivotGridRef = useRef(null); const sortSalesRef = useRef(null); const sortExpensesRef = useRef(null); const initializePivotGrid = useEvent((pivotGrid) => { pivotGridRef.current = pivotGrid; }); const initializeSortSales = useEvent((combo) => { sortSalesRef.current = combo; }); const initializeSortExpenses = useEvent((combo) => { sortExpensesRef.current = combo; }); const onCountrySelectedIndexChanged = useEvent((combo) => { ng.fields.getField('Country').descending = combo.selectedIndex == 1; }); const onProductSelectedIndexChanged = useEvent((combo) => { ng.fields.getField('Product').descending = combo.selectedIndex == 1; }); const onSubtotalsClick = (e) => { ng.showRowTotals = e.target.checked ? wjcOlap.ShowTotals.Subtotals : wjcOlap.ShowTotals.GrandTotals; }; const updateMeasureSort = () => { let sd = ng.pivotView.sortDescriptions; sd.clear(); addMeasureSort('Sales', sortSalesRef.current.text); addMeasureSort('Expenses', sortExpensesRef.current.text); }; const addMeasureSort = (fieldName, sortDirection) => { if (sortDirection != 'None') { let sd = ng.pivotView.sortDescriptions, cols = pivotGridRef.current.columns; for (let c = 0; c < cols.length; c++) { let binding = cols[c].binding; if (binding.indexOf(fieldName) == 0) { sd.push(new wjcCore.SortDescription(binding, sortDirection == 'Ascending')); } } } }; return (<div className="container-fluid"> <div className="row"> <div className="col-sm-4 panel"> <h4> Sort Dimension fields </h4> <label> Country: <wjInput.ComboBox itemsSource={sortOptions} selectedIndexChanged={onCountrySelectedIndexChanged}/> </label> <label> Product: <wjInput.ComboBox itemsSource={sortOptions} selectedIndexChanged={onProductSelectedIndexChanged}/> </label> <h4> Sort Measure fields </h4> <label> Sales: <wjInput.ComboBox itemsSource={sortOptions2} initialized={initializeSortSales} selectedIndexChanged={updateMeasureSort}/> </label> <label> Expenses: <wjInput.ComboBox itemsSource={sortOptions2} initialized={initializeSortExpenses} selectedIndexChanged={updateMeasureSort}/> </label> <label> Subtotals: <input id="subtotals" type="checkbox" onClick={onSubtotalsClick}/> </label> </div> <div className="col-sm-8"> <Olap.PivotGrid itemsSource={ng} initialized={initializePivotGrid}/> </div> </div> </div>); } const container = document.getElementById('app'); if (container) { const root = ReactDOM.createRoot(container); root.render(<App />); }
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>MESCIUS Wijmo Wijmo OLAP Pivot Grid Sort</title> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <!-- SystemJS --> <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.40/system.src.js" integrity="sha512-G6mEj6h18+m3MvzdviSDfPle/TfH0//cXcB33AKlNR/Rha0yQsKefDZKRTkIZos97HEGq2JMV1RT5ybMoQ3WsQ==" crossorigin="anonymous"></script> <script src="systemjs.config.js"></script> <script> System.import('./src/app'); </script> </head> <body> <div id="app"></div> </body> </html>
.wj-pivotgrid { box-shadow: 0 10px 20px rgba(0, 0, 0, 0.19), 0 6px 6px rgba(0, 0, 0, 0.23); } .panel label { display: block; } .panel label .wj-combobox { font-weight: normal; } h4 { margin-top: 20pt; }
export function getData(cnt) { var countries = 'US,Germany,UK,Japan,Italy'.split(','), products = 'Widgets,Gadgets,Doohickeys'.split(','), data = []; for (var i = 0; i < cnt; i++) { data.push({ country: countries[i % countries.length], product: products[i % products.length], downloads: Math.round(Math.random() * 20000), sales: Math.random() * 10000, expenses: Math.random() * 5000 }); } return data; }
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