사용자 정의 집계 (React)

FlexGrid 열의 aggregate 속성을 사용하면 전체 그리드나 각 그룹에 대해 데이터 요약을 표시할 수 있습니다. 만약 내장된 집계가 부족하다면 사용자 정의한 코드로 집계를 계산할 수도 있습니다. 아래 그리드는 "Sales"와 "Expenses"의 차액을 보여주는 "Profit" 열을 포함하고 있습니다.

'Profit' 열은 formatItem 이벤트에서 계산됩니다. 일반 데이터 항목의 수익은 실제 데이터 항목을 기반으로 합니다. 그룹의 수익은 그룹의 getAggregate 메서드를 사용하여 계산됩니다.

'Profit'열은 동적으로 계산되어지기 때문에 정렬이 되지 않으며 데이터 항목에 속하지도 않습니다.

이 데모는 React를 기반으로합니다.

import 'bootstrap.css'; import '@grapecity/wijmo.styles/wijmo.css'; import './app.css'; // import * as React from 'react'; import * as ReactDOM from 'react-dom/client'; import { FlexGrid, FlexGridColumn } from '@grapecity/wijmo.react.grid'; import { GroupRow } from '@grapecity/wijmo.grid'; import { CollectionView, PropertyGroupDescription, Globalize, toggleClass } from '@grapecity/wijmo'; import { getData } from './data'; class App extends React.Component { constructor(props) { super(props); this.state = { data: new CollectionView(getData(), { groupDescriptions: [ new PropertyGroupDescription('Grand Total', () => ''), 'country' ] }) }; } render() { return <div className="container-fluid"> <FlexGrid initialized={this.initializedGrid.bind(this)} itemsSource={this.state.data}> <FlexGridColumn binding="id" header="ID" width={60} isReadOnly={true}/> <FlexGridColumn binding="country" header="Country"/> <FlexGridColumn binding="product" header="Product"/> <FlexGridColumn binding="sales" header="Sales" aggregate="Sum"/> <FlexGridColumn binding="expenses" header="Expenses" aggregate="Sum"/> <FlexGridColumn binding="profit" header="Profit" dataType={2} isReadOnly={true} allowSorting={false}/> </FlexGrid> </div>; } initializedGrid(flex) { // start collapsed flex.collapseGroupsToLevel(1); // custom cell calculation flex.formatItem.addHandler((s, e) => { // cells and column footer panels only if (e.panel == s.cells) { // get row, column, and data item (or group description) let r = s.rows[e.row], c = s.columns[e.col], item = s.rows[e.row].dataItem, group = r instanceof GroupRow ? item : null, negative = false; // assume value is not negative // calculate profit if (c.binding == 'profit') { let profit = group ? group.getAggregate('Sum', 'sales') - group.getAggregate('Sum', 'expenses') : item.sales - item.expenses; e.cell.textContent = Globalize.format(profit, c.format); negative = profit < 0; } // update 'negative' class on cell toggleClass(e.cell, 'negative', negative); } }); } } setTimeout(() => { const container = document.getElementById('app'); if (container) { const root = ReactDOM.createRoot(container); root.render(<App />); } }, 100);
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>MESCIUS Wijmo FlexGrid Custom Aggregation</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 id="app"></div> </body> </html>
.wj-flexgrid { max-height: 250px; margin: 10px 0; } .wj-cell.wj-frozen-row { border-bottom: none; } .negative { color: red; } body { margin-bottom: 20px; }
export function getData() { // create some random data let countries = 'US,Germany,UK,Japan,Italy,Greece'.split(','), products = 'Phones,Computers,Cameras,Stereos'.split(','), data = []; for (let i = 0; i < 200; i++) { data.push({ id: i, country: countries[i % countries.length], product: products[i % products.length], sales: Math.random() * 10000, expenses: Math.random() * 5000 }); } return data; }
(function (global) { System.config({ transpiler: 'plugin-babel', babelOptions: { es2015: true, react: true }, meta: { '*.css': { loader: 'css' } }, paths: { // paths serve as alias 'npm:': 'node_modules/' }, // map tells the System loader where to look for things map: { 'jszip': 'npm:jszip/dist/jszip.js', '@grapecity/wijmo': 'npm:@grapecity/wijmo/index.js', '@grapecity/wijmo.input': 'npm:@grapecity/wijmo.input/index.js', '@grapecity/wijmo.styles': 'npm:@grapecity/wijmo.styles', '@grapecity/wijmo.cultures': 'npm:@grapecity/wijmo.cultures', '@grapecity/wijmo.chart': 'npm:@grapecity/wijmo.chart/index.js', '@grapecity/wijmo.chart.analytics': 'npm:@grapecity/wijmo.chart.analytics/index.js', '@grapecity/wijmo.chart.animation': 'npm:@grapecity/wijmo.chart.animation/index.js', '@grapecity/wijmo.chart.annotation': 'npm:@grapecity/wijmo.chart.annotation/index.js', '@grapecity/wijmo.chart.finance': 'npm:@grapecity/wijmo.chart.finance/index.js', '@grapecity/wijmo.chart.finance.analytics': 'npm:@grapecity/wijmo.chart.finance.analytics/index.js', '@grapecity/wijmo.chart.hierarchical': 'npm:@grapecity/wijmo.chart.hierarchical/index.js', '@grapecity/wijmo.chart.interaction': 'npm:@grapecity/wijmo.chart.interaction/index.js', '@grapecity/wijmo.chart.radar': 'npm:@grapecity/wijmo.chart.radar/index.js', '@grapecity/wijmo.chart.render': 'npm:@grapecity/wijmo.chart.render/index.js', '@grapecity/wijmo.chart.webgl': 'npm:@grapecity/wijmo.chart.webgl/index.js', '@grapecity/wijmo.chart.map': 'npm:@grapecity/wijmo.chart.map/index.js', '@grapecity/wijmo.gauge': 'npm:@grapecity/wijmo.gauge/index.js', '@grapecity/wijmo.grid': 'npm:@grapecity/wijmo.grid/index.js', '@grapecity/wijmo.grid.detail': 'npm:@grapecity/wijmo.grid.detail/index.js', '@grapecity/wijmo.grid.filter': 'npm:@grapecity/wijmo.grid.filter/index.js', '@grapecity/wijmo.grid.search': 'npm:@grapecity/wijmo.grid.search/index.js', '@grapecity/wijmo.grid.grouppanel': 'npm:@grapecity/wijmo.grid.grouppanel/index.js', 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'npm:bootstrap/dist/css/bootstrap.min.css', 'css': 'npm:systemjs-plugin-css/css.js', 'plugin-babel': 'npm:systemjs-plugin-babel/plugin-babel.js', 'systemjs-babel-build':'npm:systemjs-plugin-babel/systemjs-babel-browser.js' }, // packages tells the System loader how to load when no filename and/or no extension packages: { src: { defaultExtension: 'jsx' }, "node_modules": { defaultExtension: 'js' }, } }); })(this);