[Qt-interest] Finding the displayed width of rich text

[John Posner]

I've been using plain text to display a fraction as the text of a QLabel:

  "2/5"

But now, I'd like to use rich text to make a better-looking fraction, 
using the superscript-and- subscript technique:

  "<sup>2</sup>/<sub>5</sub>"

I need to know the size of the displayed fraction, in order to select 
the optimal point-size for the label. QFontMetrics.width() does the job 
for the plain-text label, but for the rich-text label, it returns the 
size of the 25-character string, not the size of the 3-character 
superscript-and-subscript string.

I found a workaround: find the size of the QLabel widget itself, which 
is just big enough to accommodate the rich-text label. But I'm looking 
for other solutions (because I want to fiddle with the label's size). 
Can anyone provide advice?

Tx,
John