Emulating a one-handed keyboard?

[wettstein509 at solnet.ch]

> The only thing currently not possible is to use space to both switch the
> layout and to produce a space character. That is related to canceling
> actions and something that certainly would appear in XKB2.

There are alternatives to get the double function.  One is to use input
methods, see, for example,

  https://bugs.freedesktop.org/show_bug.cgi?id=26705

Another one is to use the RECORD and XTEST.  In both cases, space would
normally switch the layout, but when pressed and immediately released
“compose” a space, or synthesise a key press event that creates a space,
respectively.

Andreas