import { Point } from '@vertexvis/geometry';
import { InteractionApi } from './interactionApi';
import { InteractionHandler } from './interactionHandler';
export declare abstract class MultiTouchInteractionHandler implements InteractionHandler {
    protected element?: HTMLElement;
    protected interactionApi?: InteractionApi;
    private previousFirstPoints;
    private previousSecondPoints;
    initialize(element: HTMLElement, api: InteractionApi): void;
    dispose(): void;
    protected beginTwoPointTouch(point1: Point.Point, point2: Point.Point): void;
    protected handleTwoPointTouchMove(point1: Point.Point, point2: Point.Point): void;
    protected endTwoPointTouch(): void;
    private computeDelta;
    private computeZoom;
    private computeAngle;
}