import { TransformControls } from "three/examples/jsm/controls/TransformControls.js";
import { Behaviour } from "./Component.js";
/**
 * TransformGizmo displays manipulation controls for translating, rotating, and scaling objects in the scene.
 * It wraps three.js {@link TransformControls} and provides keyboard shortcuts for changing modes and settings.
 * @category Helpers
 * @group Components
 */
export declare class TransformGizmo extends Behaviour {
    /**
     * When true, this is considered a helper gizmo and will only be shown if showGizmos is enabled in engine parameters.
     */
    isGizmo: boolean;
    /**
     * Specifies the translation grid snap value in world units.
     * Applied when holding Shift while translating an object.
     */
    translationSnap: number;
    /**
     * Specifies the rotation snap angle in degrees.
     * Applied when holding Shift while rotating an object.
     */
    rotationSnapAngle: number;
    /**
     * Specifies the scale snapping value.
     * Applied when holding Shift while scaling an object.
     */
    scaleSnap: number;
    /**
     * Gets the underlying three.js {@link TransformControls} instance.
     * @returns The TransformControls instance or undefined if not initialized.
     */
    get control(): TransformControls | undefined;
    private _control?;
    private orbit?;
    /** @internal */
    onEnable(): void;
    /** @internal */
    onDisable(): void;
    /**
     * Enables grid snapping for transform operations according to set snap values.
     * This applies the translationSnap, rotationSnapAngle, and scaleSnap properties to the controls.
     */
    enableSnapping(): void;
    /**
     * Disables grid snapping for transform operations.
     * Removes all snapping constraints from the transform controls.
     */
    disableSnapping(): void;
    /**
     * Event handler for when dragging state changes.
     * Disables orbit controls during dragging and requests ownership of the transform if it's synchronized.
     * @param event The drag change event
     */
    private onControlChangedEvent;
    /**
     * Handles keyboard shortcuts for transform operations:
     * - Q: Toggle local/world space
     * - W: Translation mode
     * - E: Rotation mode
     * - R: Scale mode
     * - Shift: Enable snapping (while held)
     * - +/-: Adjust gizmo size
     * - X/Y/Z: Toggle visibility of respective axis
     * - Spacebar: Toggle controls enabled state
     * @param event The keyboard event
     */
    private windowKeyDownListener;
    /**
     * Handles keyboard key release events.
     * Currently only handles releasing Shift key to disable snapping.
     * @param event The keyboard event
     */
    private windowKeyUpListener;
}