MapView mapView = mapWidget.getMapModel().getMapView();
WorldViewTransformer transformer = mapView.getWorldViewTransformer();
Coordinate viewPosition = getScreenPosition(event);
Coordinate worldPosition = transformer.viewToWorld(viewPosition);
mapView.setCenterPosition(worldPosition);
mapView.scale(zoomFactor, MapView.ZoomOption.LEVEL_CHANGE);
}
/**
* Set zoom factor. Should be a positive number, >1 for zooming in, <1 for zooming out.
*