import { Destroyable, Event, Listener, ObservableArray, ObservableArrayChangeInfo } from "xbsj-renderer/dist-node/xr-base-utils";
import { TreeItem } from "./TreeItem";
import { UiTree } from "./UiTree";
import { canMoveToTreeItem, canMoveToTreeItems, moveToTreeItem, moveToTreeItems } from "./move";
export declare class Tree<T extends TreeItem> extends Destroyable {
    static defaultItemDivHeight: number;
    private _root;
    private _itemChildrenChanged;
    private _itemChildrenToChange;
    private _itemsAdded;
    private _itemsDeleted;
    private _itemsChanged;
    private _transactionStack;
    private _addedItems;
    private _deletedItems;
    private _selectedItems;
    get selectedItems(): ObservableArray<T>;
    get lastSelectedItem(): T | undefined;
    private _itemDivHeight;
    get itemDivHeight(): number;
    set itemDivHeight(value: number);
    get itemDivHeightChanged(): Listener<[number, number]>;
    private _forceRedrawEvent;
    forceRedraw(): void;
    private _uiTree;
    get uiTree(): UiTree<T, Tree<T>>;
    constructor(itemDivHeight?: number);
    get root(): TreeItem;
    get children(): ObservableArray<T>;
    getDescendants(traverseFunc?: (treeItem: T) => boolean): Generator<TreeItem, void, unknown>;
    getTreeItemFromId(id: string): TreeItem | undefined;
    _startTransaction(): void;
    _stopTransaction(): void;
    _execTransaction(): void;
    get itemChildrenChanged(): Event<[T]>;
    get itemChildrenToChange(): Event<[item: T, changeInfos: ObservableArrayChangeInfo<T>[], toDels: Set<TreeItem>, toAdds: Set<TreeItem>]>;
    get itemsChanged(): Event<[T[]]>;
    get itemsAdded(): Listener<[T[]]>;
    get itemsDeleted(): Listener<[T[]]>;
    static canMoveToTreeItem: typeof canMoveToTreeItem;
    static moveToTreeItem: typeof moveToTreeItem;
    static canMoveToTreeItems: typeof canMoveToTreeItems;
    static moveToTreeItems: typeof moveToTreeItems;
}