QScintilla and QT_IM_MODULE

[Alexander Bruy]

Hi,

I'm trying to use QScintilla via Python on Windows 10. I have a
standard Qt environment variable QT_IM_MODULE=qtvirtualkeyboard
defined at the
system level.

In this environment whenever I try to instantiate QScintilla, it
crashes or hangs for a while and then crashes. If
QT_IM_MODULE=qtvirtualkeyboard is not set, everything works fine. Here
is the stacktrace I was able to get:

QsciScintillaBase::inputMethodQuery :
QsciScintillaBase::inputMethodQuery :
QsciScintillaBase::inputMethodQuery :
PyInit__gui :
QWidget::event :
QFrame::event :
QAbstractScrollArea::event :
PyInit__gui :
QApplicationPrivate::notify_helper :
QApplication::notify :
QgsApplication::notify :
QCoreApplication::notifyInternal2 :
QtVirtualKeyboard::PlatformInputContext::sendEvent :
QVirtualKeyboardInputContextPrivate::update :
QtVirtualKeyboard::PlatformInputContext::update :
QGuiApplicationPrivate::_q_updateFocusObject :
QObject::qt_static_metacall :
QWindow::focusObjectChanged :
QWidgetPrivate::updateFocusChild :
QWidget::setFocus :
PyInit_QtWidgets :
PyArg_ParseTuple_SizeT :
PyEval_EvalFrameDefault :
PyFunction_Vectorcall :
PyFloat_FromDouble :
PyVectorcall_Call :
PyObject_Call :
PyInit_QtCore :
PyInit_QtCore :
PyInit_QtCore :
PyInit_QtCore :
QObject::event :
QApplicationPrivate::notify_helper :
QApplication::notify :
QgsApplication::notify :
QCoreApplication::notifyInternal2 :
QCoreApplicationPrivate::sendPostedEvents :
qt_plugin_query_metadata :
QEventDispatcherWin32::processEvents :
qt_plugin_query_metadata :
QEventLoop::exec :
QCoreApplication::exec :
main :
BaseThreadInitThunk :

And here is my code

from PyQt5.QtWidgets import QApplication
from PyQt5.Qsci import QsciScintilla
app = QApplication([])
sci = QsciScintilla()
sci.show()
app.exec_()

I'm using Python 3.9.5, Qt 5.15.3, QScintilla 2.13.1

Any ideas what can be wrong? Are there any plans to have QScintilla
work with Qt virtualkeyboard?


-- 
Alexander Bruy