import type { IKeyboard, IKeyboardEventMap, IRenderer } from '../../abstraction';
import { Device } from './device';
export declare class Keyboard extends Device<IKeyboardEventMap> implements IKeyboard {
    static readonly KEY_SPACE: string;
    static readonly KEY_DELETE: string;
    static readonly KEY_BACKSPACE: string;
    static readonly KEY_LETTER_D: string;
    static readonly KEY_LETTER_d: string;
    private _keys;
    private _keyDownBound;
    private _keyUpBound;
    constructor();
    get isSpacePress(): boolean;
    get isDeletePress(): boolean;
    get isBackspacePress(): boolean;
    get isLetterPressD(): boolean;
    connect(renderer: IRenderer): void;
    disconnect(): void;
    protected onKeyDown(e: KeyboardEvent): void;
    protected onKeyUp(e: KeyboardEvent): void;
}