SPSVGView works with incorrect scale factor

I am using SPSVGView to implement something. But, it does not work. After some inspection, I found if I load a document with SPSVGSPViewWidget and change width and height of the document later, the scale facto, _hscale and _vscale, of SPSVGView will be set to given width and height. I think it should change _width and _height of SPSVGView instead of _hscale and _vscale. After some digging, I think SPSVGView::onDocumentResized() should be change to stop calling setScale(), and call setRescale() instead. Am I right?