Edit and Persist Views (React)

Views in the PivotEngine are defined by the viewDefinition property.

You can use the engine's viewDefinition property to persist views as application settings.

This sample shows how you can select pre-defined views, edit the current view with the PivotPanel, and save views to be loaded later.

Learn about OLAP | PivotEngine 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 ng = new wjcOlap.PivotEngine({ autoGenerateFields: false, itemsSource: getData(10000), showRowTotals: 'Subtotals', fields: [ { binding: 'date', header: 'Quarter', format: '\"Q\"q yyyy' }, { binding: 'date', header: 'Month', format: 'MMMM' }, { binding: 'agent', header: 'Agent' }, { binding: 'region', header: 'Region' }, { binding: 'platform', header: 'Platform' }, { binding: 'product', header: 'Product' }, { binding: 'sales', header: 'Sales', format: 'c2' }, { binding: 'downloads', header: 'Downloads', format: 'n0' }, { binding: 'revenue', header: 'Revenue', format: 'c2' }, ], rowFields: ['Quarter'], columnFields: ['Platform'], valueFields: ['Sales', 'Downloads', 'Revenue'] }); function App() { const onSaveClick = () => { localStorage.viewDefinition = ng.viewDefinition; }; const onLoadClick = () => { if (localStorage.viewDefinition) { ng.viewDefinition = localStorage.viewDefinition; } }; const onButtonClick = (e) => { switch (e.target.id) { case 'basic': ng.rowFields.clear(); ng.columnFields.clear(); ng.valueFields.clear(); ng.rowFields.push('Quarter'); ng.columnFields.push('Platform'); ng.valueFields.push('Sales', 'Downloads', 'Revenue'); break; case 'region': ng.rowFields.clear(); ng.columnFields.clear(); ng.valueFields.clear(); ng.rowFields.push('Quarter', 'Region'); ng.valueFields.push('Sales', 'Downloads', 'Revenue'); break; case 'agent-product': ng.rowFields.clear(); ng.columnFields.clear(); ng.valueFields.clear(); ng.rowFields.push('Quarter', 'Agent'); ng.columnFields.push('Platform', 'Product'); ng.valueFields.push('Sales', 'Downloads', 'Revenue'); break; case 'quarter-month': ng.rowFields.clear(); ng.columnFields.clear(); ng.valueFields.clear(); ng.rowFields.push('Quarter', 'Month'); ng.valueFields.push('Sales', 'Downloads', 'Revenue'); break; } }; return (<div className="container-fluid"> <div id="buttons" className="buttons" onClick={onButtonClick}> <button id="basic" className="btn btn-success"> Quarterly/Platform View </button> <button id="region" className="btn btn-success"> Regional View </button> <button id="agent-product" className="btn btn-success"> Agent/Product View </button> <button id="quarter-month" className="btn btn-success"> Quarterly/Monthly View </button> </div> <p> Use these buttons to save and load views: </p> <div className="buttons"> <button id="save" className="btn btn-primary" onClick={onSaveClick}> Save View </button> <button id="load" className="btn btn-primary" onClick={onLoadClick}> Load View </button> </div> <div className="row"> <div className="col-sm-6"> <p> Use the <b>PivotPanel</b> control to edit the view: </p> <Olap.PivotPanel itemsSource={ng}/> </div> <div className="col-sm-6"> <p> Use the <b>PivotGrid</b> control to see the results: </p> <Olap.PivotGrid itemsSource={ng}/> </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>Grapecity Wijmo OLAP Pivot Engine Defining Views</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>
.buttons { display: flex; margin-bottom: 12px; } .buttons .btn { margin: 6px; white-space: normal; }
var products = [ { product: 'Wijmo', platform: 'Web' }, { product: 'ActiveReports', platform: 'Desktop' }, { product: 'ActiveReportsJS', platform: 'Web' }, { product: 'ComponentOne', platform: 'Desktop' }, { product: 'Spread', platform: 'Desktop' }, { product: 'SpreadJS', platform: 'Web' }, { product: 'GCDocs', platform: 'Desktop' } ]; var agents = [ { agent: 'Ashlyn Dunlop', region: 'East' }, { agent: 'Keith Vang', region: 'East' }, { agent: 'Bobbi Rodrigues', region: 'West' }, { agent: 'Charli Medina', region: 'West' }, { agent: 'Kaitlin Salt', region: 'West' }, ]; function randomInt(min, max) { return Math.floor(Math.random() * (max - min + 1) + min); } export function getData(cnt) { var year = new Date().getFullYear(), data = []; for (var i = 0; i < cnt; i++) { let productIndex = randomInt(0, 6); let agentIndex = randomInt(0, 4); data.push({ orderId: randomInt(1, 10000), platform: products[productIndex].platform, product: products[productIndex].product, agent: agents[agentIndex].agent, region: agents[agentIndex].region, date: new Date(year - randomInt(0, 2), randomInt(0, 11), randomInt(0, 27)), sales: randomInt(1500, 3500), downloads: randomInt(10, 200), revenue: randomInt(500, 1000) }); } return data; }
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