Why is setPreeditText not directly available in QML?

[urgm_t]

Hi,

I have been trying to use the setPreeditText function in QML to set preedit text dynamically for my virtual keyboard implementation. However, when I call setPreeditText from QML (e.g., InputContext.setPreeditText()), I receive the following error:

Property 'setPreeditText' of object QVirtualKeyboardInputContext(xxxxxxx) is not a function

Could you please clarify:

• Is setPreeditText not exposed in QML?
• Is there any official documentation or Qt design guideline that explicitly mentions this limitation?
• If possible, could you share the recommended way to dynamically set preedit text in QML? I would greatly appreciate any suggestions.

Thank you for your time and help!

[urgm_t]

I found that the InputContext object in QML does not have a setPreeditText function. This method is only available in the C++ QInputMethodEvent class.
QML: https://doc.qt.io/qt-5/qml-qtquick-virtualkeyboard-inputcontext.html
C++: https://doc.qt.io/qt-5/qvirtualkeyboardinputcontext.html

Below are my remaining questions:

• Is there any official documentation or Qt design guideline that explicitly mentions this limitation?
• If possible, could you share the recommended way to preedit text in QML?

[jeremy_k]

According to the documentation, https://doc.qt.io/qt-5/qml-qtquick-virtualkeyboard-inputcontext.html#preeditText-prop:

preeditText : string

This property sets the pre-edit text.

The property isn't marked read-only, indicating that an application can assign to it.