import { DraggableElement } from "./draggable-element";
export declare abstract class BaseTreeItem extends DraggableElement {
    private static collapsedIconClass;
    private static expandedIconClass;
    private _isExpanded;
    private _isSelected;
    private _rootElement;
    private _treeItemElement;
    private _expandCollapseElement;
    private _childContainerElement;
    private needsToBeScrolled;
    private setIsSelected;
    protected abstract getLabelText(): string;
    protected click(e: MouseEvent): void;
    protected getIconClass(): string;
    protected getAdditionalText(): string;
    protected getAdditionalTextClass(): string;
    protected getIndentationLevelIncrement(): number;
    protected getDragSourceElement(): HTMLElement;
    protected selectedChanged(scrollIntoView: boolean): void;
    protected itemInvoked(): void;
    private getExpandCollapseAriaText;
    private handleKeyboardLeftNav;
    private handleKeyboardRightNav;
    protected internalRender(): HTMLElement;
    protected _level: number;
    onSelectedChange: (sender: BaseTreeItem) => void;
    onItemInvoked: (sender: BaseTreeItem) => void;
    constructor(isExpanded?: boolean);
    abstract getChildCount(): number;
    abstract getChildAt(index: number): BaseTreeItem;
    updateLayout(): void;
    expand(): void;
    collpase(): void;
    isDraggable(): boolean;
    get level(): number;
    get isSelected(): boolean;
    set isSelected(value: boolean);
}