グリッド:動的な列 (Angular)

このサンプルでは、​​コレクションに基づいてFlexGrid列を動的に作成し、FlexGridがデータモデルと同期された状態を維持する方法を示します。

主な機能:

  • 動的な列の作成: エディターを使用すると、ユーザーは表示する列を選択し、その順序を定義できます。

  • 同期: 列の定義に使用されるコレクションは、FlexGridを動的に更新して変更を反映します。

  • 双方向のインタラクション: ドラッグ操作による列の並び替えなど、FlexGridに加えられた変更は、基になるコレクションに反映されます。

このアプローチにより、列レイアウトをプログラムで柔軟に管理できるようになり、FlexGridの状態とアプリケーションのデータモデル間の一貫性が確保されます。

このサンプルはAngularを使用しています。

import 'bootstrap.css'; import '@mescius/wijmo.styles/wijmo.css'; import './styles.css'; // import '@angular/compiler'; import { Component, ViewChild, enableProdMode, ɵresolveComponentResources } from '@angular/core'; import { BrowserModule, bootstrapApplication } from '@angular/platform-browser'; import {ObservableArray,CollectionView, getType} from '@mescius/wijmo' import { FlexGrid } from '@mescius/wijmo.grid'; import { WjGridModule } from '@mescius/wijmo.angular2.grid'; import { WjInputModule } from '@mescius/wijmo.angular2.input'; import { getData, getHeaders } from './data'; // @Component({ standalone: true, imports: [WjGridModule, WjInputModule, BrowserModule], selector: 'app-component', templateUrl: 'src/app.component.html' }) export class AppComponent { data: CollectionView; columnsAvailable: CollectionView; columns: CollectionView; @ViewChild('flex') flex: FlexGrid; constructor( ) { var data = getData(50); this.data = new CollectionView(data); // 利用可能な列のリストを作成する var fields = new ObservableArray(getHeaders().map(item => item)); this.columnsAvailable = new CollectionView(fields); this.columns = new CollectionView(); for (var i = 0; i < 3; i++) { this.columnsAvailable.moveCurrentToFirst(); this.addColumn(); } } // 列の順序はアイテム/インデックスによって定義される必要がある shouldTrackByIndex = true; // 列の順序をカスタム追跡するための関数 trackByIndex = (index: number, item: any): any => { let colIndex = this.columns.sourceCollection.slice().indexOf(item); // ドラッグ&ドロップ操作で列を正しく並べ替える return this.shouldTrackByIndex ? colIndex : item; } // アイテムをcolumnsAvailableからcolumnsに移動する addColumn() { var item = this.columnsAvailable.currentItem, index = this.columns.currentPosition; if (item) { this.columnsAvailable.remove(item); this.columns.sourceCollection.splice(Math.max(0, index), 0, item); this.columns.moveCurrentTo(item); } } // アイテムをcolumnsからcolumnsAvailableに移動する removeColumn() { var item = this.columns.currentItem, index = this.columnsAvailable.currentPosition; if (item) { this.columns.remove(item); this.columnsAvailable.sourceCollection.splice(Math.max(0, index), 0, item); this.columnsAvailable.moveCurrentTo(item); } } // 列コレクション内で列を移動する moveColumn(offset:number) { this.shouldTrackByIndex = true; // 列のドラッグ操作が完了していない場合 var item = this.columns.currentItem; if (item) { var arr = this.columns.sourceCollection, index = arr.indexOf(item), newIndex = index + offset; if (index > -1 && newIndex > -1) { arr.splice(index, 1); arr.splice(newIndex, 0, item); this.columns.moveCurrentTo(item); } } } // ユーザーが列を移動した場合、列配列を更新する // (ng-forディレクティブではこれができない) draggedColumn(s: FlexGrid) { this.shouldTrackByIndex = true; var columns = new ObservableArray(); for (var i = 0; i < s.columns.length; i++) { columns.push({ binding: s.columns[i].binding, header: s.columns[i].header }); } this.columns.sourceCollection = columns; } getColumnDataType(key:string){ let _dataItem = this.data.sourceCollection[0]; return getType(_dataItem[key]); } } // // enableProdMode(); // リソース (templateUrl、styleUrlsなど) を解決する。解決後、すべてのURLは`template`文字列に変換される。 ɵresolveComponentResources(fetch).then(() => { // Bootstrapアプリケーション bootstrapApplication(AppComponent).catch(err => console.error(err)); });
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>MESCIUS Wijmo FlexGrid Dynamic Columns</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/fesm2015/zone.min.js"></script> <!-- SystemJS --> <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.21.5/system.src.js" integrity="sha512-skZbMyvYdNoZfLmiGn5ii6KmklM82rYX2uWctBhzaXPxJgiv4XBwJnFGr5k8s+6tE1pcR1nuTKghozJHyzMcoA==" crossorigin="anonymous"></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-sm-5 col-md-5"> <h3> 列コレクションを編集する </h3> <div class="row"> <div class="col-md-2"> <wj-list-box class="wide" [displayMemberPath]="'header'" [itemsSource]="columnsAvailable"></wj-list-box> </div> <div class="col-md-8"> <button type="button" class="btn btn-default btn-lg btn-block" title="Add Column" [disabled]="columnsAvailable.currentItem == null" (click)="addColumn(columnsAvailable.currentItem)"> <span class="wj-glyph-right"></span>(選択項目を列に追加します) </button> <button type="button" class="btn btn-default btn-lg btn-block" title="Remove Column" [disabled]="columns.currentItem == null" (click)="removeColumn()">(選択項目を列から削除します) <span class="wj-glyph-left"></span> </button> <button type="button" class="btn btn-default btn-lg btn-block" title="Move Column Up" [disabled]="columns.currentPosition <= 0" (click)="moveColumn(-1)"> <span class="wj-glyph-up"></span>(選択項目の列を左に移動します) </button> <button type="button" class="btn btn-default btn-lg btn-block" title="Move Column Down" [disabled]="columns.currentPosition >= columns.itemCount - 1" (click)="moveColumn(+1)"> <span class="wj-glyph-down"></span>(選択項目の列を右に移動します) </button> </div> <div class="col-md-2"> <wj-list-box class="wide" [displayMemberPath]="'header'" [itemsSource]="columns"></wj-list-box> </div> </div> </div> <div class="col-sm-7 col-md-7"> <h3> 結果はこちら </h3> <ul> <li *ngFor="let col of columns.items">{{col.header}}</li> </ul> <wj-flex-grid #flex class="wide" [itemsSource]="data" (draggingColumn)="shouldTrackByIndex=false;" (draggedColumn)="draggedColumn(flex)"> <wj-flex-grid-column *ngFor="let col of columns.items; trackBy: trackByIndex;" [binding]="col.binding" [header]="col.header" [dataType]="getColumnDataType(col.binding)"> </wj-flex-grid-column> </wj-flex-grid> </div> </div> </div>
.wj-flexgrid { width: 100%; height: 400px; } .wj-listbox { width: 100%; height: 225px; } .btn-block{ font-size: 12px; }
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