PivotEngine

PivotEngine 类是 wijmo.olap 的核心。 它的工作原理如下:

  1. 将其 itemsSource 属性设置为包含要汇总的数据的数组。
  2. 让它根据数据自动生成 fields,或明确定义您感兴趣的字段。
  3. 通过配置每个字段并将其复制到其中一个输出字段列表(rowFieldscolumnFieldsvalueFieldsfilterFields)来构建视图定义。
  4. 如果要允许用户使用拖放操作自定义视图定义,请将引擎绑定到** PivotPanel **控件。
  5. pivotView 属性获取摘要视图,或将引擎绑定到 PivotGridPivotChart 控件。

下面的表格显示了一些原始数据和使用 PivotEngine 创建的摘要视图:

import 'bootstrap.css'; import '@grapecity/wijmo.styles/wijmo.css'; import './styles.css'; import * as wjOlap from '@grapecity/wijmo.olap'; import * as wjGrid from '@grapecity/wijmo.grid'; import { getData } from './data'; // document.readyState === 'complete' ? init() : window.onload = init; // function init() { // // initialize pivot engine var ng = new wjOlap.PivotEngine({ itemsSource: getData(10000), showRowTotals: 'Subtotals', valueFields: ['Amount'], rowFields: ['Buyer', 'Type'] // by buyer and by type }); ng.fields.getField('Amount').format = 'c0'; // customize field // // show raw data var rawData = new wjGrid.FlexGrid('#rawData', { itemsSource: ng.collectionView }); // // show summary var pivotGrid = new wjOlap.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 Pivot Engine Overview</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-5"> <p>Raw data:</p> <div id="rawData"></div> </div> <div class="col-xs-7"> <p> Amount spent by each buyer on each expense type. </p> <div id="pivotGrid"></div> </div> </div> <p> The view is live. If you edit the raw data, the summary view is automatically updated. </p> <p> The pivot grid shows how much each person spent on each type of expense. If you double-click any cell, you will see a detail dialog showing the items that make up the total. </p> </div> </body> </html> import * as wjCore from '@grapecity/wijmo'; function randomItem(arr) { return arr[Math.floor(Math.random() * arr.length)]; } export function getData(cnt) { var today = new Date(), buyers = 'Mom,Dad,Kelly,Sheldon'.split(','), types = 'Food,Clothes,Fuel,Books,Sports,Music'.split(','), data = []; for (var i = 0; i < cnt; i++) { data.push({ date: wjCore.DateTime.addDays(today, -Math.random() * 365), buyer: randomItem(buyers), type: randomItem(types), amount: 20 + Math.random() * 1000 }); } return data; } .wj-flexgrid { height: 300px; } body { margin-bottom: 24pt; } import 'bootstrap.css'; import '@grapecity/wijmo.styles/wijmo.css'; import './styles.css'; import * as wjOlap from '@grapecity/wijmo.olap'; // import { Component, Inject, enableProdMode, NgModule } from '@angular/core'; import { platformBrowserDynamic } from '@angular/platform-browser-dynamic'; import { BrowserModule } from '@angular/platform-browser'; import { WjGridModule } from '@grapecity/wijmo.angular2.grid'; import { WjOlapModule } from '@grapecity/wijmo.angular2.olap'; import { DataService } from './app.data'; // @Component({ selector: 'app-component', templateUrl: 'src/app.component.html' }) export class AppComponent { ng: wjOlap.PivotEngine; // constructor(@Inject(DataService) private dataService: DataService) { this.ng = new wjOlap.PivotEngine({ itemsSource: dataService.getData(10000), // raw data showRowTotals: 'Subtotals', valueFields: ['Amount'], // summarize amounts rowFields: ['Buyer', 'Type'] // by buyer and by type) }); this.ng.fields.getField('Amount').format = 'c0'; // customize field } } // @NgModule({ imports: [WjGridModule, WjOlapModule, BrowserModule], declarations: [AppComponent], providers: [DataService], bootstrap: [AppComponent] }) export class AppModule { } // enableProdMode(); // Bootstrap application with hash style navigation and global services. platformBrowserDynamic().bootstrapModule(AppModule); <!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 Overview</title> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <!-- Polyfills --> <script src="node_modules/core-js/client/shim.min.js"></script> <script src="node_modules/zone.js/dist/zone.min.js"></script> <!-- SystemJS --> <script src="node_modules/systemjs/dist/system.js"></script> <script src="systemjs.config.js"></script> <script> // workaround to load 'rxjs/operators' from the rxjs bundle System.import('rxjs').then(function (m) { System.set(SystemJS.resolveSync('rxjs/operators'), System.newModule(m.operators)); System.import('./src/app.component'); }); </script> </head> <body> <app-component></app-component> </body> </html> <div class="container-fluid"> <div class="row"> <div class="col-xs-5"> <p>Raw data:</p> <wj-flex-grid [itemsSource]="ng.collectionView"></wj-flex-grid> </div> <div class="col-xs-7"> <p> Amount spent by each buyer on each expense type. </p> <wj-pivot-grid [itemsSource]="ng"></wj-pivot-grid> </div> </div> <p> The view is live. If you edit the raw data, the summary view is automatically updated. </p> <p> The pivot grid shows how much each person spent on each type of expense. If you double-click any cell, you will see a detail dialog showing the items that make up the total. </p> </div> import { Injectable } from '@angular/core'; import * as wjCore from '@grapecity/wijmo'; export interface DataItem { date: Date; buyer: string; type: string; amount: number; } function randomItem(arr: string[]): string { return arr[Math.floor(Math.random() * arr.length)]; } @Injectable() export class DataService { getData(cnt: number): DataItem[] { var today = new Date(), buyers = 'Mom,Dad,Kelly,Sheldon'.split(','), types = 'Food,Clothes,Fuel,Books,Sports,Music'.split(','), data = []; for (var i = 0; i < cnt; i++) { data.push({ date: wjCore.DateTime.addDays(today, -Math.random() * 365), buyer: randomItem(buyers), type: randomItem(types), amount: 20 + Math.random() * 1000 }); } return data; } } .wj-flexgrid { height: 300px; } body { margin-bottom: 24pt; } <template> <div class="container-fluid"> <div class="row"> <div class="col-xs-5"> <p>Raw data:</p> <wj-flex-grid :items-source="ng.collectionView"></wj-flex-grid> </div> <div class="col-xs-7"> <p> Amount spent by each buyer on each expense type. </p> <wj-pivot-grid :items-source="ng" :initialized="initializePivotGrid"></wj-pivot-grid> </div> </div> <p> The view is live. If you edit the raw data, the summary view is automatically updated. </p> <p> The pivot grid shows how much each person spent on each type of expense. If you double-click any cell, you will see a detail dialog showing the items that make up the total. </p> </div> </template> <script> import '@grapecity/wijmo.styles/wijmo.css'; import 'bootstrap.css'; import Vue from 'vue'; import '@grapecity/wijmo.vue2.olap'; import '@grapecity/wijmo.vue2.grid'; import * as wjcOlap from '@grapecity/wijmo.olap'; import { getData } from './data' let App = Vue.extend({ name: "app", data: function() { return { ng: new wjcOlap.PivotEngine({ itemsSource: getData(10000), // raw data showRowTotals: 'Subtotals', valueFields: ['Amount'], // summarize amounts rowFields: ['Buyer', 'Type'] // by buyer and by type) }) }; }, methods: { initializePivotGrid: (pivotGrid) => { pivotGrid.engine.fields.getField('Amount').format = 'c0'; } } }); new Vue({ render: h => h(App) }).$mount("#app"); </script> <style> .wj-flexgrid { height: 300px; } body { margin-bottom: 24pt; } </style> <!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 Overview</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.vue'); </script> </head> <body> <div id="app"> </div> </body> </html> import * as wjcCore from '@grapecity/wijmo'; export function getData(cnt) { var today = new Date(), buyers = 'Mom,Dad,Kelly,Sheldon'.split(','), types = 'Food,Clothes,Fuel,Books,Sports,Music'.split(','), data = []; for (var i = 0; i < cnt; i++) { data.push({ date: wjcCore.DateTime.addDays(today, -Math.random() * 365), buyer: randomItem(buyers), type: randomItem(types), amount: 20 + Math.random() * 1000 }); } return data; } function randomItem(arr) { return arr[Math.floor(Math.random() * arr.length)]; } import './app.css'; import 'bootstrap.css'; import '@grapecity/wijmo.styles/wijmo.css'; // import * as React from 'react'; import * as ReactDOM from 'react-dom'; // import * as Olap from '@grapecity/wijmo.react.olap'; import * as Grid from '@grapecity/wijmo.react.grid'; import * as wjcOlap from '@grapecity/wijmo.olap'; import { getData } from './data'; class App extends React.Component { constructor(props) { super(props); this.initializePivotGrid = (pivotGrid) => { pivotGrid.engine.fields.getField('Amount').format = 'c0'; }; this.state = { ng: new wjcOlap.PivotEngine({ itemsSource: getData(10000), showRowTotals: 'Subtotals', valueFields: ['Amount'], rowFields: ['Buyer', 'Type'] // by buyer and by type) }) }; } render() { return (<div className="container-fluid"> <div className="row"> <div className="col-xs-5"> <p>Raw data:</p> <Grid.FlexGrid itemsSource={this.state.ng.collectionView}></Grid.FlexGrid> </div> <div className="col-xs-7"> <p> Amount spent by each buyer on each expense type. </p> <Olap.PivotGrid itemsSource={this.state.ng} initialized={this.initializePivotGrid}></Olap.PivotGrid> </div> </div> <p> The view is live. If you edit the raw data, the summary view is automatically updated. </p> <p> The pivot grid shows how much each person spent on each type of expense. If you double-click any cell, you will see a detail dialog showing the items that make up the total. </p> </div>); } } ReactDOM.render(<App />, document.getElementById('app')); <!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>AutoComplete</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 { height: 300px; } body { margin-bottom: 24pt; } import * as wjcCore from '@grapecity/wijmo'; export function getData(cnt) { var today = new Date(), buyers = 'Mom,Dad,Kelly,Sheldon'.split(','), types = 'Food,Clothes,Fuel,Books,Sports,Music'.split(','), data = []; for (var i = 0; i < cnt; i++) { data.push({ date: wjcCore.DateTime.addDays(today, -Math.random() * 365), buyer: randomItem(buyers), type: randomItem(types), amount: 20 + Math.random() * 1000 }); } return data; } function randomItem(arr) { return arr[Math.floor(Math.random() * arr.length)]; }