import type { FederatedWheelEvent } from '@visactor/vtable/es/vrender';
import type { Gantt } from '../Gantt';
import type { EventManager } from './event-manager';
import type { StateManager } from '../state/state-manager';
export declare function handleWhell(event: FederatedWheelEvent, state: StateManager, gantt: Gantt, isWheelEvent?: boolean): void;
export declare function isVerticalScrollable(deltaY: number, state: StateManager): boolean;
export declare function isHorizontalScrollable(deltaX: number, state: StateManager): boolean;
export declare class InertiaScroll {
    friction: number;
    lastTime: number;
    speedX: number;
    speedY: number;
    stateManager: StateManager;
    runingId: number;
    scrollHandle: (dx: number, dy: number) => void;
    constructor(stateManager: StateManager);
    setScrollHandle(scrollHandle: (dx: number, dy: number) => void): void;
    startInertia(speedX: number, speedY: number, friction: number): void;
    inertia(): void;
    endInertia(): void;
    isInertiaScrolling(): boolean;
}
export declare function bindScrollBarListener(eventManager: EventManager): void;