[6a3a178] | 1 | /**
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| 2 | * @license
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| 3 | * Copyright Google LLC All Rights Reserved.
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| 4 | *
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| 5 | * Use of this source code is governed by an MIT-style license that can be
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| 6 | * found in the LICENSE file at https://angular.io/license
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| 7 | */
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| 8 | import { Observable } from 'rxjs';
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| 9 | import { BaseTreeControl } from './base-tree-control';
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| 10 | /** Optional set of configuration that can be provided to the NestedTreeControl. */
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| 11 | export interface NestedTreeControlOptions<T, K> {
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| 12 | trackBy?: (dataNode: T) => K;
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| 13 | }
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| 14 | /** Nested tree control. Able to expand/collapse a subtree recursively for NestedNode type. */
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| 15 | export declare class NestedTreeControl<T, K = T> extends BaseTreeControl<T, K> {
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| 16 | getChildren: (dataNode: T) => (Observable<T[]> | T[] | undefined | null);
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| 17 | options?: NestedTreeControlOptions<T, K> | undefined;
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| 18 | /** Construct with nested tree function getChildren. */
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| 19 | constructor(getChildren: (dataNode: T) => (Observable<T[]> | T[] | undefined | null), options?: NestedTreeControlOptions<T, K> | undefined);
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| 20 | /**
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| 21 | * Expands all dataNodes in the tree.
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| 22 | *
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| 23 | * To make this working, the `dataNodes` variable of the TreeControl must be set to all root level
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| 24 | * data nodes of the tree.
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| 25 | */
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| 26 | expandAll(): void;
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| 27 | /** Gets a list of descendant dataNodes of a subtree rooted at given data node recursively. */
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| 28 | getDescendants(dataNode: T): T[];
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| 29 | /** A helper function to get descendants recursively. */
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| 30 | protected _getDescendants(descendants: T[], dataNode: T): void;
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| 31 | }
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