qtvirtualkeyboard | QtQuick virtual keyboard | Keyboard library

Why RPATH_CHECK in CMake deletes executable?

Because that's what it does. (?)

Is it correct behavior of CMake, or it is a bug?

Correct.

What RPATH_CHECK should do?

Check if the file has desired RPATH, and if it doesn't, the file should be removed.

If you have any other concerns about RPATH features in CMake, I posted the source code in the last answer - all is there. Search for RPATH_CHECK in CMake source tree, and you'll find the find the function - from function names you can "guess" meaning and the algorithm used.

You can use -s TOTAL_MEMORY=32MB compiler flag to preset a size at emcc link time. Related question: wasm-ld: error: initial memory too small, 18317952 bytes needed

There is a default limit setting, set to: 16777216 https://github.com/emscripten-core/emscripten/blob/master/src/settings.js#L171

You can hide the handle by setting the InputMethodHint flag in the TextField to Qt.ImhNoTextHandles. That should get rid of the handle. ref https://doc.qt.io/qt-5/qt.html

With the help of Qt Support, I got it working. The way I did it, calling the Qt Virtual Keyboard results in the application trying to make the keyboard a top level window on top of the application. This is how the Desktop case is treated as well, but there it works.

To avoid this behavior, one has to embed the keyboard into the QML window. For this to happen, an InputPanel can be added to the QML window like so:

Ok, so after another few days of all out war with the virtual keyboard, I have finally achieved the desired result.

After finding this gem of a guide, it turns out that because the widget containing my QTableView and QtVirtualKeyboard was a QDialog that was being displayed using the exec() method, it meant that the window properties wouldn't allow the keyboard to modify my data. And while the solution proposed in the guide didn't resolve my problem, making my widget inherit QWidget did set me off along the path to getting it all working properly.

I say this because once I changed my QDialog into a QWidget, I then had a console output error saying unknown:0 input method is not set every time I pressed a key.

The solution to this was to remove the Qt:Dialog flag from my setWindowFlags() method. And maybe most importantly, set the focus policy of my QQuickWidget to NoFocus like so:

First, be the binaries associated with Qt VirtualKeyboard, and to not install Qt I have used aqtinstall(In this example Qt 5.15 was installed but it is recommended to use the same version that was used to compile pyqt5: python -c "from PyQt5.QtCore import QT_VERSION_STR; print('Qt version', QT_VERSION_STR)"):