グリッド:動的な列 (Vue)

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Vueを使用しています。

<template> <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 displayMemberPath="header" :itemsSource="columnsAvailable"></wj-list-box> </div> <div class="col-md-8"> <button type="button" class="btn btn-default btn-lg btn-block" :disabled="columnsAvailable.currentItem == null" @click="addColumn" title="Add Column"> <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" :disabled="columns.currentItem == null" @click="removeColumn" title="Remove Column"> <span class="wj-glyph-left"></span>(選択項目を列から削除します) </button> <button type="button" class="btn btn-default btn-lg btn-block" :disabled="columns.currentPosition <= 0" @click="moveColumn(-1)" title="Move Column Up"> <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" :disabled="columns.currentPosition >= columns.items.length - 1" @click="moveColumn(1)" title="Move Column Down"> <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 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 v-for="col in columns.items" :key="col">{{ col.header }}</li> </ul> <wj-flex-grid class="wide" :items-source="data" :draggedColumn="draggedColumn"> <wj-flex-grid-column v-for="(col, index) in columns.items" :key="getColKey(col.binding, index)" :binding="col.binding" :header="col.header"></wj-flex-grid-column> </wj-flex-grid> </div> </div> </div> </template> <script setup> import { CollectionView, ObservableArray } from "@mescius/wijmo"; import { getData, getHeaders } from "./data"; import { ref, onMounted } from "vue"; let _data = getData(50); const fields = getHeaders(); const data = ref(new CollectionView(_data)); const columnsAvailable = ref(new CollectionView(fields)); const columns = ref(new CollectionView([])); onMounted(function () { // デフォルトの列を追加する for (let i = 0; i < 3; i++) { columnsAvailable.value.moveCurrentToFirst(); addColumn(); } }); function getColKey(col, index) { return col + '-' + index; } function addColumn() { let item = columnsAvailable.value.currentItem, index = columns.value.currentPosition; if (item) { columnsAvailable.value.remove(item); columns.value.sourceCollection.splice(Math.max(0, index), 0, item); columns.value.refresh(); columns.value.moveCurrentTo(item); } } function removeColumn() { var item = columns.value.currentItem, index = columnsAvailable.value.currentPosition; if (item) { columns.value.remove(item); columnsAvailable.value.sourceCollection.splice(Math.max(0, index), 0, item); columnsAvailable.value.refresh(); columnsAvailable.value.moveCurrentTo(item); } } function moveColumn(offset) { var item = columns.value.currentItem; if (item) { var arr = columns.value.sourceCollection, index = arr.indexOf(item), newIndex = index + offset; if (index > -1 && newIndex > -1) { arr.splice(index, 1); arr.splice(newIndex, 0, item); columns.value.refresh(); columns.value.moveCurrentTo(item); } } } function draggedColumn(s) { 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, }); } columns.value.sourceCollection = _columns; } </script> <style> .wide { width: 100%; } .wj-flexgrid { width: 100%; height: 400px; } .wj-listbox { width: 100%; height: 225px; } .btn-block{ font-size: 12px; } </style>
<!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"> <!-- SystemJS --> <script src="compiler.js" type="module"></script> <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> System.import('./src/app.js'); </script> </head> <body> <div id="app"> </div> </body> </html>
export const getData = (count) => { let data = [], countries = ['アメリカ', 'ドイツ', 'イギリス', '日本', 'イタリア', 'ギリシャ', 'スペイン', 'カナダ', 'オーストラリア', '中国', 'オーストリア'], products = ['ウィジェット', 'ガジェット', 'ツール'], colors = ['黒', '白', '赤', '緑','青'], dt = new Date(); for (let i = 0; i < count; i++) { data.push({ id: i, date: new Date(dt.getFullYear(), i % 12, 25, i % 24, i % 60, i % 60), country: countries[Math.floor(Math.random() * countries.length)], product: products[Math.floor(Math.random() * products.length)], color: colors[Math.floor(Math.random() * colors.length)], amount: Math.random() * 10000 - 5000, discount: Math.random() / 4, active: i % 4 == 0, }); } return data; } export const getHeaders = () => { return [ { binding: "id", header: "ID" }, { binding: "date", header: "日付" }, { binding: "country", header: "国" }, { binding: "product", header: "商品" }, { binding: "color", header: "色" }, { binding: "amount", header: "量" }, { binding: "discount", header: "値引き" }, { binding: "active", header: "有効" }, ]; };
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