グリッド:階層データのフィルター

CollectionViewクラスは、コレクションの直接の子である項目のみフィルターをサポートしています。ほとんどの場合、階層データではうまく機能しません。階層的なデータのフィルターは、子要素が表示されているときにそのすべての祖先も表示する必要があるため、簡単な操作ではありません。下のグリッドでフィルターを入力すると、フィルターに一致する都市とその親の州、もしくは、フィルターに一致する州とその子の都市を表示します。たとえば、フィルターボックスに「ラン」と入力します。

import 'bootstrap.css'; import '@grapecity/wijmo.styles/wijmo.css'; import './styles.css'; import { FlexGrid } from '@grapecity/wijmo.grid'; import { getData } from './data'; // document.readyState === 'complete' ? init() : window.onload = init; // function init() { // // create tree-style grid var theGrid = new FlexGrid('#theGrid', { childItemsPath: 'cities', headersVisibility: 'Column', itemsSource: getData(), columns: [ { binding: 'name', header: '名前', width: 200 }, { binding: 'type', header: '種類' }, { binding: 'population', header: '人口' } ], sortedColumn: applyHierarchicalFilter }); // // update filter document.getElementById('filter').addEventListener('input', function (e) { applyHierarchicalFilter(); }); // // update row visibility function applyHierarchicalFilter() { let input = document.getElementById('filter'), filter = input.value.toLowerCase(), grid = theGrid, rows = grid.rows; for (let i = 0; i < rows.length; i++) { let row = rows[i], state = row.dataItem, rng = row.getCellRange(); // // handle states (level 0) if (row.level == 0) { // // check if the state name matches the filter var stateVisible = state.name.toLowerCase().indexOf(filter) >= 0; if (stateVisible) { // // it does, so show the state and all its cities for (var j = rng.topRow; j <= rng.bottomRow; j++) { rows[j].visible = true; } // } else { // // it does not, so check the cities for (var j = rng.topRow + 1; j <= rng.bottomRow; j++) { var city = rows[j].dataItem, cityVisible = city.name.toLowerCase().indexOf(filter) >= 0; rows[j].visible = cityVisible; stateVisible = stateVisible || cityVisible; } // // if at least one city is visible, the state is visible rows[i].visible = stateVisible; } // // move on to the next group i = rng.bottomRow; } } } }
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>GrapeCity Wijmo FlexGrid Filtering Hierarchical Data</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="input-group"> <div class="input-group-addon"><span class="glyphicon glyphicon-search"></span></div> <input id="filter" class="form-control" placeholder="名前のフィルター"> </div> <div id="theGrid"> </div> <p> 階層的なフィルターの詳細については、<a href="http://wijmo.com/blog/filter-hierarchical-data-flexgrid/" target="_blank" rel="noopener noreferrer">FlexGridとAngularで階層データをフィルターする方法(英語)</a>のブログを参照してください。</p> </div> </body> </html>
// some hierarchical data export function getData() { return [ { name: 'ワシントン', type: '州', population: 6971, cities: [ { name: 'シアトル', type: '都市', population: 652 }, { name: 'スポケーン', type: '都市', population: 210 } ] }, { name: 'オレゴン', type: '州', population: 3930, cities: [ { name: 'ポートランド', type: '都市', population: 609 }, { name: 'ユージーン', type: '都市', population: 159 } ] }, { name: 'カリフォルニア', type: '州', population: 38330, cities: [ { name: 'ロサンゼルス', type: '都市', population: 3884 }, { name: 'サンディエゴ', type: '都市', population: 1356 }, { name: 'サンフランシスコ', type: '都市', population: 837 } ] } ]; }
.wj-flexgrid { max-height: 250px; margin: 10px 0; } .wj-cell.wj-group { border: none; } .wj-cell.wj-group:not(.wj-state-selected):not(.wj-state-multi-selected) { background-color: white; } body { margin-bottom: 20px; }
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