import { ExtendedEvent, InputEventType } from "../types";
export declare const SUPPORT_TOUCH: boolean;
export declare const SUPPORT_POINTER: boolean;
export declare const SUPPORT_MSPOINTER: boolean;
export declare const SUPPORT_POINTER_EVENTS: boolean;
export declare const isValidKey: (event: InputEventType | WheelEvent, inputKey?: string[]) => boolean;
export declare abstract class EventInput {
    prevEvent: ExtendedEvent;
    private _latestInterval;
    abstract onEventStart(event: InputEventType, inputButton?: string[]): ExtendedEvent;
    abstract onEventMove(event: InputEventType, inputButton?: string[]): ExtendedEvent;
    abstract onEventEnd(event: InputEventType): void;
    abstract onRelease(event: InputEventType): void;
    abstract getTouches(event: InputEventType, inputKey?: string[], inputButton?: string[]): number;
    protected abstract _getScale(event: InputEventType): number;
    protected abstract _getCenter(event: InputEventType): {
        x: number;
        y: number;
    };
    protected abstract _getMovement(event: InputEventType): {
        x: number;
        y: number;
    };
    extendEvent(event: InputEventType): ExtendedEvent;
    protected _getDistance(start: Touch | PointerEvent, end: Touch | PointerEvent): number;
    protected _getButton(event: InputEventType): string;
    protected _isTouchEvent(event: InputEventType): event is TouchEvent;
    protected _isValidButton(button: string, inputButton: string[]): boolean;
    protected _isValidEvent(event: InputEventType, inputKey?: string[], inputButton?: string[]): boolean;
    protected _preventMouseButton(event: InputEventType, button: string): void;
    private _stopContextMenu;
}