import { Destroyable, Event } from "vtxf-xe2/dist-node/xe2-base-utils";
import { FTreeItemType } from "./FTreeItem";
import { FTreeType } from "./FTree";
export declare type FTreeRedrawInfo<T extends FTreeItemType<T>> = {
    topFreeSpaceHeight: number;
    topUnvisibleItemNum: number;
    middleTreeItems: T[];
    bottomFreeSpaceHeight: number;
    bottomUnvisibleItemNum: number;
    totalHeight: number;
    hasScrollY: boolean;
};
export declare class UiFTree<T extends FTreeItemType<T>> extends Destroyable {
    private _tree;
    get tree(): FTreeType<T>;
    private _itemDivHeight;
    get itemDivHeight(): number;
    set itemDivHeight(value: number);
    get itemDivHeightChanged(): import("vtxf-xe2/dist-node/xe2-base-utils").Listener<[number, number]>;
    private _divHeight;
    get divHeight(): number;
    set divHeight(value: number);
    get divHeightChanged(): import("vtxf-xe2/dist-node/xe2-base-utils").Listener<[number, number]>;
    private _scrollTop;
    get scrollTop(): number;
    set scrollTop(value: number);
    get scrollTopChanged(): import("vtxf-xe2/dist-node/xe2-base-utils").Listener<[number, number]>;
    private _hasScrollX;
    get hasScrollX(): boolean;
    set hasScrollX(value: boolean);
    get hasScrollXChanged(): import("vtxf-xe2/dist-node/xe2-base-utils").Listener<[boolean, boolean]>;
    private _scrollXHeight;
    get scrollXHeight(): number;
    set scrollXHeight(value: number);
    get scrollXHeightChanged(): import("vtxf-xe2/dist-node/xe2-base-utils").Listener<[number, number]>;
    private _childrenTraverseFunc;
    get childrenTraverseFunc(): ((item: T) => boolean) | undefined;
    set childrenTraverseFunc(value: ((item: T) => boolean) | undefined);
    get childrenTraverseFuncChanged(): import("vtxf-xe2/dist-node/xe2-base-utils").Listener<[((item: T) => boolean) | undefined, ((item: T) => boolean) | undefined]>;
    private _itemVisibleFunc;
    get itemVisibleFunc(): ((item: T) => boolean) | undefined;
    set itemVisibleFunc(value: ((item: T) => boolean) | undefined);
    get itemVisibleFuncChanged(): import("vtxf-xe2/dist-node/xe2-base-utils").Listener<[((item: T) => boolean) | undefined, ((item: T) => boolean) | undefined]>;
    private _redrewEvent;
    get redrewEvent(): Event<[FTreeRedrawInfo<T>]>;
    private _toRedrawEvent;
    get toRedrawEvent(): import("vtxf-xe2/dist-node/xe2-base-utils").NextAnimateFrameEvent;
    toRedraw(): void;
    private _toRedarwInit;
    forceRedraw(): void;
    private _redrawInfo;
    get redrawInfo(): FTreeRedrawInfo<T>;
    constructor(_tree: FTreeType<T>);
}