if(w == _boundingRect.width()) return _boundingRect.height();
int h = heightForWidth(w);
_boundingRect.setWidth(w);
_boundingRect.setHeight(h);
if(w == _boundingRect.width()) return _boundingRect.height();
int h = heightForWidth(w);
_boundingRect.setWidth(w);
_boundingRect.setHeight(h);