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31 lines
1.4 KiB
31 lines
1.4 KiB
/**
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* @license
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* Copyright Google LLC All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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import { Observable } from 'rxjs';
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import { BaseTreeControl } from './base-tree-control';
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/** Optional set of configuration that can be provided to the NestedTreeControl. */
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export interface NestedTreeControlOptions<T, K> {
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trackBy?: (dataNode: T) => K;
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}
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/** Nested tree control. Able to expand/collapse a subtree recursively for NestedNode type. */
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export declare class NestedTreeControl<T, K = T> extends BaseTreeControl<T, K> {
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getChildren: (dataNode: T) => (Observable<T[]> | T[] | undefined | null);
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options?: NestedTreeControlOptions<T, K> | undefined;
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/** Construct with nested tree function getChildren. */
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constructor(getChildren: (dataNode: T) => (Observable<T[]> | T[] | undefined | null), options?: NestedTreeControlOptions<T, K> | undefined);
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/**
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* Expands all dataNodes in the tree.
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*
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* To make this working, the `dataNodes` variable of the TreeControl must be set to all root level
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* data nodes of the tree.
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*/
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expandAll(): void;
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/** Gets a list of descendant dataNodes of a subtree rooted at given data node recursively. */
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getDescendants(dataNode: T): T[];
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/** A helper function to get descendants recursively. */
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protected _getDescendants(descendants: T[], dataNode: T): void;
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}
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