When qreal is float, it cannot represent all values an int can take,
so we may lose precision in the expression
qreal(d->value) - d->minimum
as opposed to the exact result
qint64(d->value) - d->minimum'
For lack of trying, I do not know of a value where this would change
the resulting 'progress' value, but better be safe than sorry, and use
the 64-bit integer expression instead.
Found while reviewing integer arithmetic in QProgressBar as part of
the fix for QTBUG-57857.
While touching the line, make the (intended) double → int truncation
explicit, by using a static_cast.
Change-Id: I03dbfce24c709310c3bbad9487a2bf0d1d78137a
Reviewed-by: David Faure <david.faure@kdab.com>
a3d0983f59