keycodes all off by one with GTK and $DISPLAY pointing to an R5 server

[Kean Johnston]

Hi everyone,

I am having a really difficult time understanding this problem.
Here's what I do:

On 6.8.2 server, I run both an R5 'xev' and the 6.8.2 'xev'.
If I press the TAB key, in both cases I get keycode 23,
keysym 0xff09, Tab. If I press the 'q' key I get keycode
24, keysym 0x71, q. Life is good.

Now I repeat the test running on a X terminal, or on an
old R5 server, and things fall apart. If I press the TAB
key, I get keycode 22, keysym 0xff09, Tab. If I press the
'q' key I get keycode 23, keysym 0x71, q. Notice that the
keycodes are all off-by-one, but teh keysyms are correct.

This causes considerable problems for GTK apps, which
seem to want to use the keycode, not the keysym. Thus,
for example, in Mozilla, pressing the 'q' key yields a
TAB for me. Not so useful that! Same with gvim.

So, I have two questions really: Why is everything off-by-one,
and why does GTK use the keycode, and not the keysym?

Any help at all would be greatly appreciated.

Kean