GTK-2 has reached EOL, most applications should be now using GTK-3+.
Fcitx, IBus, SCIM and UIM, in relation to GTK(+) and Qt, provide primarily not applications using GTK(+) and Qt, but plugins internally loaded by GTK(+) and Qt which provide input methods support in all applications using GTK(+) and Qt.
Support for plugins for GTK+ 2 in Fcitx, IBus, SCIM and UIM should be package.use.masked at the same time as package.masking GTK+ 2 itself, not earlier.
However possibly existing GUI applications (usually for configuration, like fcitx(5)-config-*, fcitx(5)-configtool, ibus-setup, scim-setup) can unconditionally use newest/best version of GTK(+) / Qt.
The bug has been referenced in the following commit(s):
Author: Matt Turner <email@example.com>
AuthorDate: 2022-04-14 18:30:15 +0000
Commit: Matt Turner <firstname.lastname@example.org>
CommitDate: 2022-04-15 19:24:58 +0000
app-i18n/ibus: Don't enable IUSE=X or IUSE=gtk2 by default
X users will have USE=X set globally. gtk+2 is on the way out.
Signed-off-by: Matt Turner <email@example.com>
app-i18n/ibus/ibus-1.5.26.ebuild | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)