import { SyntheticEvent, SyntheticEventListener } from '../events';
import { Point, Size } from '../math';
import { HitTestResult } from './hit-test';
import type { PaintingContext } from './painting-context';
import type { RenderObject, Visitor } from './render-object';
import { RenderPipeline } from './render-pipeline';
import { RenderSingleChild } from './render-single-child';
export declare enum ScrollAxis {
    None = 0,
    Horizontal = 1,
    Vertical = 2
}
export declare enum ScrollBounds {
    None = 0,
    Horizontal = 1,
    Vertical = 2,
    /**
     * 相当于设置 ScrollBounds.Horizontal | ScrollBounds.Vertical
     * @deprecated
     */
    Fit = 3
}
export declare class RenderScrollView extends RenderSingleChild<RenderObject> {
    static readonly DEFAULT_SCROLLBAR_AUTO_HIDE_DELAY = 2000;
    private hScrollbar;
    private vScrollbar;
    readonly scrollbarMargin = 4;
    constructor();
    private handlePointerDownGrip;
    private handlePointerUpGrip;
    private handleWheel;
    /**
     * 滚动方向，默认 ScrollAxis.Horizontal | ScrollAxis.Vertical
     */
    get scrollAxis(): number;
    set scrollAxis(value: number);
    private _scrollAxis;
    /**
     * 设置或获取是否按需展示滚动条
     *
     * 滚动条是不占位的，他会覆盖在滚动内容上方
     *
     * 默认情况下，当滚动范围大于滚动大小时，展示滚动条
     *
     * 你也可以单独设置滚动条是否展示
     *
     * 例如：
     *
     * ```typescript
     * // 仅按需展示水平滚动条
     * myScrollView.scrollbar = ScrollAxis.Horizontal
     * ```
     */
    get scrollbar(): number;
    set scrollbar(value: number);
    private _scrollbar;
    /**
     * 滚动条自动消失的延迟 ms
     */
    get scrollbarAutoHideDelay(): number;
    set scrollbarAutoHideDelay(value: number);
    private _scrollbarAutoHideDelay;
    private _scrollbarAutoHideDelayFrames;
    private _scrollOffsetUpdateFlag;
    private forcePaintScrollbar;
    /**
     * 滚动边界，修改该属性会导致 relayout，默认 ScrollBounds.Horizontal | ScrollBounds.Vertical
     */
    get scrollBounds(): number;
    set scrollBounds(value: number);
    private _scrollBounds;
    /**
     * 滚动位置，相当于 DOM 的 scrollLeft / scrollTop
     */
    get scrollOffset(): Point;
    set scrollOffset(value: Point);
    private _scrollOffset;
    _setScrollOffset(value: Point): boolean;
    enterFrame(): void;
    _paint(context: PaintingContext, offset: Point): void;
    private fitIntoScrollBounds;
    protected ensureScrollOffsetValid(): void;
    /**
     * 滚动大小，相当于 scrollWidth, scrollHeight
     *
     * 用户可以指定滚动大小，此时子节点的 size 将不起作用
     *
     * 默认使用子节点的 size
     */
    get scrollSize(): Size;
    set scrollSize(value: Size | undefined);
    private _scrollSize?;
    get scrollWidth(): number;
    get scrollHeight(): number;
    get scrollLeftMax(): number;
    get scrollTopMax(): number;
    get scrollLeft(): number;
    set scrollLeft(value: number);
    get scrollTop(): number;
    set scrollTop(value: number);
    adoptChild(child: RenderObject): void;
    private updateChildViewport;
    protected setSize(value: Size): boolean;
    performLayout(): void;
    visitChildren(visitor: Visitor<RenderObject>): void;
    attach(owner: RenderPipeline): void;
    detach(): void;
    get repaintBoundary(): boolean;
    _repaintBoundaryLocked: boolean;
    hitTestChildren(result: HitTestResult, position: Point): boolean;
    private hitTestScrollbar;
    private dispatchScrollEvent;
    get onScroll(): SyntheticEventListener<SyntheticEvent<RenderScrollView, Event>> | undefined;
    set onScroll(value: SyntheticEventListener<SyntheticEvent<RenderScrollView, Event>> | undefined);
    private _onScroll?;
}