import { OnInit } from '@angular/core';
import * as i0 from "@angular/core";
export interface TreeNode {
    id: string;
    label: string;
    icon?: string;
    children?: TreeNode[];
    hasChildren?: boolean;
    disabled?: boolean;
    data?: unknown;
}
export interface TreeNodeEvent {
    node: TreeNode;
}
export declare class TreeViewComponent implements OnInit {
    nodes: import("@angular/core").InputSignal<TreeNode[]>;
    selectable: import("@angular/core").InputSignal<boolean>;
    checkable: import("@angular/core").InputSignal<boolean>;
    selectedId: import("@angular/core").InputSignal<string | null>;
    expandedIds: import("@angular/core").InputSignal<string[]>;
    showSearch: import("@angular/core").InputSignal<boolean>;
    searchPlaceholder: import("@angular/core").InputSignal<string>;
    showActions: import("@angular/core").InputSignal<boolean>;
    theme: import("@angular/core").InputSignal<"light" | "dark">;
    nodeSelect: import("@angular/core").OutputEmitterRef<TreeNodeEvent>;
    nodeExpand: import("@angular/core").OutputEmitterRef<TreeNodeEvent>;
    nodeCollapse: import("@angular/core").OutputEmitterRef<TreeNodeEvent>;
    checkChange: import("@angular/core").OutputEmitterRef<{
        node: TreeNode;
        checked: boolean;
    }>;
    actionClick: import("@angular/core").OutputEmitterRef<{
        node: TreeNode;
        action: "add" | "edit" | "delete";
    }>;
    private expandedSet;
    private checkedSet;
    private indeterminateSet;
    focusedId: import("@angular/core").WritableSignal<string | null>;
    searchQuery: import("@angular/core").WritableSignal<string>;
    ngOnInit(): void;
    isExpanded(id: string): boolean;
    isChecked(id: string): boolean;
    isIndeterminate(id: string): boolean;
    hasNodeChildren(node: TreeNode): boolean;
    filteredNodes: import("@angular/core").Signal<TreeNode[]>;
    onSearchInput(event: Event): void;
    clearSearch(): void;
    onNodeClick(node: TreeNode, e: MouseEvent): void;
    toggleExpand(node: TreeNode, e: MouseEvent): void;
    onCheck(node: TreeNode): void;
    updateAncestorCheckStates(): void;
    onAction(node: TreeNode, action: 'add' | 'edit' | 'delete'): void;
    onKeyDown(e: KeyboardEvent): void;
    private flatVisibleIds;
    private findNode;
    /** Expand all nodes that have children. */
    expandAll(): void;
    /** Collapse all nodes. */
    collapseAll(): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<TreeViewComponent, never>;
    static ɵcmp: i0.ɵɵComponentDeclaration<TreeViewComponent, "ngx-tree-view", never, { "nodes": { "alias": "nodes"; "required": false; "isSignal": true; }; "selectable": { "alias": "selectable"; "required": false; "isSignal": true; }; "checkable": { "alias": "checkable"; "required": false; "isSignal": true; }; "selectedId": { "alias": "selectedId"; "required": false; "isSignal": true; }; "expandedIds": { "alias": "expandedIds"; "required": false; "isSignal": true; }; "showSearch": { "alias": "showSearch"; "required": false; "isSignal": true; }; "searchPlaceholder": { "alias": "searchPlaceholder"; "required": false; "isSignal": true; }; "showActions": { "alias": "showActions"; "required": false; "isSignal": true; }; "theme": { "alias": "theme"; "required": false; "isSignal": true; }; }, { "nodeSelect": "nodeSelect"; "nodeExpand": "nodeExpand"; "nodeCollapse": "nodeCollapse"; "checkChange": "checkChange"; "actionClick": "actionClick"; }, never, never, true, never>;
}