import { ITargetContext } from '../iTargetContext';
import { Application } from './application';
import { Viewport } from './viewport';
/**
 * Group that acts as an interactive viewport by applying a transformation from user input.
 */
export declare class InteractiveViewport extends Viewport {
    private viewportHandle;
    /**
     * Get a vector from the touch position of an event relative to the drawing's context.
     * Will throw error when the event does not contain position information.
     * @param event - The event to use.
     * @param touchIndex - The index of the touch point.
     * @returns The resulting vector.
     */
    private extractFromTouchEventRelativeToContext;
    /**
     * Constructor.
     * @param context - The target context.
     * @param application - The corresponding application.
     */
    constructor(context: ITargetContext, application: Application);
    /**
     * Enable or disable the viewport actions like panning and zooming.
     * @param enabled - Whether to enable or disable the actions.
     */
    enableViewportActions(enabled: boolean): void;
}