QT_IM_MODULE=xim not handling dead keys and composition

echo "Dummy input method \"none\" (do not use any fancy input method by default)"

# set XMODIFIERS="@im=local".
# "@im=local" means "use compose and dead-keys" and
# some programs will use compose and dead-keys only if XMODIFIERS
# is set to either "@im=local" or "@im=none".
        
export XMODIFIERS="@im=local"     # use "Compose"

# Input of German umlauts in acroread doesn't work if GTK_IM_MODULE is
# unset. Make sure that it is set here.
#
# Setting it to "xim" is a reasonable setting together with
# XMODIFIERS="@im=local" because Compose support then works exactly
# as defined in the X11 Compose file.
#
# But this still causes problems when saving files
# with non-ASCII characters in the file name from acroread 8.x because
# xim support in acroread 8.x is very buggy
# (see http://bugzilla.novell.com/show_bug.cgi?id=370330)
#
# Apart from problems in acroread, xim is generally
# known to be quite buggy. Therefore a better choice is probably
# GTK_IM_MODULE=cedilla. This changes 6 Compose key sequences to
# produce U+00C7 (LATIN CAPITAL LETTER C WITH CEDILLA) and
# LATIN_SMALL_LETTER_C_WITH_CEDILLA which produce 
# U+00E7 (LATIN SMALL LETTER C WITH CEDILLA) instead of
# U+0106 (LATIN CAPITAL LETTER C WITH ACUTE) and
# U+0107 (LATIN SMALL LETTER C WITH ACUTE).
# Most users won't notice that small change, and for those who do notice
# it is probably even useful.
# For details see  http://bugzilla.novell.com/show_bug.cgi?id=413879#c27

export GTK_IM_MODULE=cedilla

export QT_IM_MODULE=xim            # to make Compose work as expected in Qt
#export QT_IM_SWITCHER=imsw-none   # disable input method switching in Qt
export QT_IM_SWITCHER=imsw-multi   # enable input method switching in Qt

return 0