This is the case for keys such as Qt::Key_Delete ("\u007F"),
and Qt::ControlModifier + Qt::Key_C ("\u0003") on Windows and XCB,
as well as potentially any key event on macOS when IM is not enabled,
as of 705665957b.
We can not filter QKeyEvent text() based on QChar::isPrint() or
similar, as there might e.g. be valid printable text in the private
use area, depending on the script and available fonts.
See QInputControl::isAcceptableInput() for some of this complexity.
Task-number: QTBUG-106393
Change-Id: I84d7ed86f57c1b605ac512d0f7ab66f6a11ed7bb
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@qt.io>
419cf9245a