Qt5 application with root access cannot work

[allencch]

In some condition, I have to run qt5 application with sudo/root. I have added

export GTK_IM_MODULE=xim
export QT_IM_MODULE=xim
export XMODIFIERS=@im=fcitx

to the environment variable. And checked can work with GTK application and QT4 application but not working in QT5.

Steps to reproduce

1. Use the environment variables above, either normal user or root, run a Qt5 application such as QtDesigner 5.

Installed software

I have installed:
fcitx-qt5 1.1.1
fcitx-qt4 4.2.9.4
fcitx-gtk3 4.2.9.4
fcitx-gtk2 4.2.9.4
fcitx 4.2.9.4

[wengxt]

Qt 5 doesn't support xim.