Maybe something related to an input method? Input methods are used for things 
like composing Japanese characters.

-John Weeks

> On Jan 3, 2022, at 2:31 PM, Joshua Grauman <jnf...@grauman.com> wrote:
> 
> Hi all,
> 
> I am working on using QTextLayout and I was wondering if someone could give 
> me a quick explanation for what preedit text / preedit area was in this 
> context? There's not much detail in the docs, reading the Qt code and 
> googling hasn't helped me much.
> 
> When/why would you use setPreeditArea(int pos, QString text) vs 
> setText(QString). What's a preedit area?
> 
> Thanks in advance,
> 
> Josh
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