How to let fcitx work with Qt6?

[followait]

Env

• Manjaro KDE
• Qt 6.2.0
• fcitx 4.2.9.8
• ~/.pam_environment

  GTK_IM_MODULE DEFAULT=fcitx
  QT_IM_MODULE  DEFAULT=fcitx
  XMODIFIERS    DEFAULT=\@im=fcitx
  

Reproduce

1. Create a new Qt project in Qt Creator
2. Edit CmakeLists.txt to use Qt5 or Qt6
3. Add a QLineEdit on the main windows
4. Build and run
5. Focus on the QLineEdit
6. Press Ctrl+Space

Problem

• Edit CmakeLists.txt to use Qt5, Ctrl+Space can be used to switch input mehtod and it works fine
• Edit CmakeLists.txt to use Qt6, Ctrl+Space does nothing

[Tomek]

Do you have installed fcitx5-qt6-git? That’s package is probably required to work with Qt6. AUR (en) - fcitx5-qt6-git

[followait]

@Tomek

Do you have installed fcitx5-qt6-git? That’s package is probably required to work with Qt6.

No, fcitx 4.2.9.8 is used

[SergeFan]

The latest version is Fcitx5 and Fcitx4 is under maintenance now. In other words, probably you won’t be able to get fcitx4 work with Qt 6.2.