import { Destroyable, ObservableArray, Event, Listener } from 'vtxf-renderer/dist-node/xr-base-utils';
import { FTreeType } from './FTree';
export declare type FTreeItemInsertFlag = 'Inner' | 'Before' | 'After';
export interface FTreeItemType<T extends FTreeItemType<T>> {
    readonly tree: FTreeType<T>;
    parent?: T;
    parentChanged: Listener<[T | undefined, T | undefined]>;
    setParent(treeItem: T | undefined): void;
    level: number;
    levelChanged: Listener<[number, number]>;
    updateLevelFromParent(): void;
    readonly hasChildren: boolean;
    childrenChanged: Event<[T]>;
    children: ObservableArray<T>;
    itemLocked: boolean;
    getDescendants(traverseFunc?: (treeItem: T) => boolean, filterFunc?: (treeItem: T) => boolean): Generator<T, void, unknown>;
    getAncestors(traverseFunc?: (treeItem: T) => boolean, filterFunc?: (treeItem: T) => boolean): Generator<T, void, unknown>;
    isDescendantOf(treeItem: T): boolean;
    isAncestorOf(treeItem: T): boolean;
    detachFromParent(): void;
    insertNewTreeItem(flag: FTreeItemInsertFlag, newTreeItem?: T): boolean;
    destroy(): void;
    memId: number;
}
export declare class FTreeItem<T extends FTreeItemType<T>> extends Destroyable {
    private _tree;
    private _currentTreeItem;
    get tree(): FTreeType<T>;
    private _parent;
    get parent(): T | undefined;
    get parentChanged(): Listener<[T | undefined, T | undefined]>;
    setParent(treeItem: T | undefined): void;
    private _level;
    get level(): number;
    get levelChanged(): Listener<[number, number]>;
    updateLevelFromParent(): void;
    private _children?;
    get hasChildren(): boolean;
    private _childrenChanged;
    get childrenChanged(): Event<[T]>;
    clearChildren(filterFunc?: (item: T) => boolean): void;
    get children(): ObservableArray<T>;
    private _itemLocked;
    get itemLocked(): boolean;
    set itemLocked(value: boolean);
    get itemLockedChanged(): Listener<[boolean, boolean]>;
    private _extras;
    get extras(): any;
    set extras(value: any);
    get extrasChanged(): Listener<[any, any]>;
    constructor(_tree: FTreeType<T>, _currentTreeItem: T);
    getDescendants(traverseFunc?: (treeItem: T) => boolean, filterFunc?: (treeItem: T) => boolean): Generator<T, void, unknown>;
    getAncestors(traverseFunc?: (treeItem: T) => boolean, filterFunc?: (treeItem: T) => boolean): Generator<T, void, unknown>;
    isDescendantOf(treeItem: T): boolean;
    isAncestorOf(treeItem: T): boolean;
    detachFromParent(): void;
    /**
     * 在当前节点上右键新建节点，如果当前节点是组节点(有children)，则加入子节点数组中；否则插入当前节点之前（作为兄弟节点）
     * 新节点成功挂接，返回true，否则false
     * @param flag 'Inner' | 'Before' | 'After'
     * @param newTreeItem 需要新加入的节点，如果为undefined，表示测试是否能在当前节点加入新节点
     * @returns
     */
    insertNewTreeItem(flag: FTreeItemInsertFlag, newTreeItem?: T): boolean;
}