@angular/material
Version:
Angular Material
37 lines • 3.78 kB
JavaScript
/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import { DataSource } from '@angular/cdk/collections';
import { BehaviorSubject, merge } from 'rxjs';
import { map } from 'rxjs/operators';
/**
* Data source for nested tree.
*
* The data source for nested tree doesn't have to consider node flattener, or the way to expand
* or collapse. The expansion/collapsion will be handled by TreeControl and each non-leaf node.
*/
export class MatTreeNestedDataSource extends DataSource {
constructor() {
super(...arguments);
this._data = new BehaviorSubject([]);
}
/**
* Data for the nested tree
*/
get data() { return this._data.value; }
set data(value) { this._data.next(value); }
connect(collectionViewer) {
return merge(...[collectionViewer.viewChange, this._data])
.pipe(map(() => {
return this.data;
}));
}
disconnect() {
// no op
}
}
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