QSvgRenderer boundsOnElement()总是返回文本元素的大小为0,0。

I've been having a little trouble with QSvgRenderer and text elements; every time I call boundsOnElement(), I get back a QRect that correctly corresponds to the top left corner of the text element (after applying matrixForElement(), of course), but its width and height are always zero.I've been having a little trouble with QSvgRend