Custom compose key sequences in GTK applications

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1

Hello, I have a problem with the compose key in GTK apps in Plasma (Wayland).

I have a bunch of custom compose key sequences in my $XCOMPOSEFILE that I frequently use. These work perfectly fine in KDE programs, but in GTK applications, only the standard sequences work.

Is there a trick to make them work in GTK applications as well?

2

Maybe you have to set up IBUS for it to work. GTK dropped some functionality recently

3

Yes, setting up an input method seems to do the trick.

I ultimately went with Fcitx5 instead, as IBus behaves strangely when the compose key is caps lock, but it appears to be working now.