How can I abort a print job?

[fredrossperry]

I am printing using QPrinter, in a thread. The main UI thread has a progress dialog with a cancel button.
If the user cancels before the printing is complete, I want to abort the job. Is there hope? Thank you.

[sirop]

Try http://qt-project.org/doc/qt-5/qprinter.html#abort

[fredrossperry]

I am calling this, but it's not helping. My pseudo-code is like this:

get a QPrinter
make a QPainter, begin
for each page
{
if user canceled
call QPrinter abort
break
render page to printer
}

It does stop rendering new pages (break), but the
abor seems to have no effect.

[sirop]

Well, the docs say:
It is not always possible to abort a print job. For example, all the data has gone to the printer but the printer cannot or will not cancel the job when asked to.