Translations:FAQ/80/en

In order to make input method some what usable with CURRENTLY available and widely adopted techniques, Fcitx 5 implements a mechanism called "Client Side Input Panel", which basically asks client application to render the input window. This is done through dbus and IM Module for Gtk/Qt. The implementation requires using a underlying wayland protocol xdg_popup to show the window. Unfortunately, only new version of xdg_popup protocol supports moving a visible popup window, and this part is NOT implemented in Gtk3 and Qt5. What makes it even worse is that Gtk3 and Qt5 both comes to their end of life, which means it is not possible to get this new protocol support in Gtk3/Qt5. The issue is that input method requires to display a window that resizes and moves extremely frequently. To mitigate this issue, Fcitx 5 IM Module implement a hack that when we need to move the window, it will hide the window first and then show the window. Unfortunately, this would cause certain-level of blinking. It might looks bad in certain hardware and compositor combination.