VirtualKeyboard | a X11 virtual keyboard written by qt5 | Keyboard library

As per the documentation, the HasExited property throws an InvalidOperationException when there is no OS process associated with the Process instance.

Your property is initialized to a new instance of the Process class, which has not been started. Therefore, there is no OS process associated with that instance, and the HasExited property will throw an exception.

Remove the field initializer, and test for null in your method.

The variable CMAKE_INSTALL_PREFIX should not be expanded in the CMakeLists.txt, as you are doing. Its actual value at invocation time is available inside the install(CODE) fragments.

Consider the following snippet:

You have 2 errors:

• The host is wrong.
• The coordinate is not to Zambia but to Poland

If you want to use the keyboard then you must set the environment variable "QT_IM_MODULE" to be "mockup", and you can do that by placing the following line of code in the main.cpp:

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:

In my previous solution I used the Qt binaries officially provided but not compatible with the RPI architecture so you have to compile it:

I found a solution thanks to folibis.

Qt virtual keyboard can be controlled using arrow keys but it has to be compiled again using CONFIG+=arrow-key-navigation as described in this topic :
How to use arrows to navigate through a QtVirtualKeyboard

and in this Qt documentation :
https://stackoverflow.com/questions/54719106/how-to-use-arrows-to-navigate-through-a-qtvirtualkeyboard

Then, as folibis said in his previous comment, arrow key events can be simulated using QKeyEvent objects : QKeyEvent *event = new QKeyEvent ( QEvent::KeyPress, Qt::Key_Enter, Qt::NoModifier); QCoreApplication::postEvent (engine->rootObjects().first(), event);