export declare enum Event {
    NONE = 0,
    PRESS = 1,
    RELEASE = 2,
    HOLD = 3
}
export declare enum States {
    ALT = 0,
    CTRL = 1,
    META = 2,
    SHIFT = 3
}
/**
 * The current Button or Key state for a particular Query
 */
export declare abstract class InputState {
    private _event;
    private _states;
    private _frame;
    constructor();
    get event(): Event;
    get states(): number;
    get altKey(): boolean;
    get ctrlKey(): boolean;
    get metaKey(): boolean;
    get shiftKey(): boolean;
    get frame(): number;
    get isPressed(): boolean;
    get isReleased(): boolean;
    get isHeld(): boolean;
    _set(event: Event, states: number, frame: number): InputState;
    _reset(): InputState;
    _framepp(): InputState;
    static compileStates(altKey: boolean, ctrlKey: boolean, metaKey: boolean, shiftKey: boolean): number;
}
export declare abstract class InputDevice {
    constructor();
    abstract setup(element: HTMLElement | null): void;
    abstract pause(): void;
    abstract resume(): void;
    /**
     * Updates the internal state of the keyboard
     */
    abstract update(): void;
}