Value Fields (Measures) (React)

The PivotEngine has several field collections exposed as properties. valueFields contain fields used as "measures", typically numeric values that are summarized by the engine. Use the PivotPanel to drag multiple copies of fields into the valueFields collection. When you do that, the panel creates clones that have their own properties. This allows you to summarize fields using different aggregates and calculations.

Learn about OLAP | PivotPanel Documentation | PivotPanel API Reference

This example uses React.

import 'bootstrap.css'; import '@mescius/wijmo.styles/wijmo.css'; import ReactDOM from 'react-dom/client'; import React from 'react'; import '@mescius/wijmo.touch'; // support drag/drop on touch devices import * as Olap from '@mescius/wijmo.react.olap'; import * as wjcOlap from '@mescius/wijmo.olap'; import './app.css'; import { getData } from './data'; const ngPanel = new wjcOlap.PivotEngine({ itemsSource: getData(), valueFields: ['Amount'], rowFields: ['Buyer', 'Type'] // summarize amounts }); ngPanel.fields.getField('Amount').format = 'c0'; function App() { return (<div className="container-fluid"> <div className="row"> <div className="col-sm-5"> <p> Drag and drop fields to build views: </p> <Olap.PivotPanel id="sample-panel" itemsSource={ngPanel}/> </div> <div className="col-sm-7"> <p> Summary for the current view definition: </p> <Olap.PivotGrid itemsSource={ngPanel}/> </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 Panel Value Fields</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>
#sample-panel { background: #eee; box-shadow: 0 10px 20px rgba(0, 0, 0, 0.19), 0 6px 6px rgba(0, 0, 0, 0.23); } #sample-panel .wj-flexgrid { background: inherit; } #sample-panel [wj-part=d-vals] { background: gold; }
export function getData() { var yr = new Date().getFullYear(); return [{ date: new Date(yr, 0, 1), buyer: 'Mom', type: 'Fuel', amount: 74 }, { date: new Date(yr, 0, 15), buyer: 'Mom', type: 'Food', amount: 235 }, { date: new Date(yr, 0, 17), buyer: 'Dad', type: 'Sports', amount: 20 }, { date: new Date(yr, 0, 21), buyer: 'Kelly', type: 'Books', amount: 125 }, { date: new Date(yr, 1, 2), buyer: 'Mom', type: 'Food', amount: 235 }, { date: new Date(yr, 1, 20), buyer: 'Kelly', type: 'Music', amount: 20 }, { date: new Date(yr, 1, 25), buyer: 'Kelly', type: 'Tickets', amount: 125 }, ]; }
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