[Development] Question about keyboard mapping

[Randall OReilly]

Is this not incorporated into the main Qt codebase?  If not, why not?  I encountered a similar problem with the Mac Xserver in an earlier version of Qt (I think the first “fallback” fixed that but seems like this is a much more robust solution?).  Cheers,

- Randy

> On Oct 6, 2016, at 8:50 AM, Frank Richter <frank.richter at gmail.com> wrote:
> 
> Hi,
> I think what happened is that at some point keyboard handling on X11 was changed to use xkb exclusively.
> This works fine if the server provides the xkb layout identity; this usually is the case for non-ancient(?) X.org servers, but not necessarily for other server vendors.
> Now, if that identity can not be determined, a fallback is used; still an xkb keyboard layout from the local machine.
> Unfortunately, the "other" servers mentioned above may not use key codes that match those from the local fallback layout, and you end up with weird behaviour.
> (In my case it happened with Exceed, and keys were sort of "one off": you pressed a key, but what appeared on screen was an adjacent letter...)
> 
> Anyway, the "solution" was to evaluate the keyboard mapping available through the core protocol, and synthesize an xkb layout from that. This allows keyboard input to work even if the server doesn't support xkb. You can find patches here: https://github.com/res2k/QtLegacyXKeyboard
> 
> Hope I could help,
> -f.r.
> 
> On Mon, 3 Oct 2016 at 21:16 Scott Aron Bloom <scott at towel42.com> wrote:
> I have had a bunch of customers report that using our tool over Xceed, ASTEX-X, and now XManager, are having problems with the keyboard mapping.
> 
> Was there something fixed post Qt 5.5.1 for this type of issue?  I am stuck on 5.5.1 for the near future, and will have to back patch it.
> 
>  
> 
> Scott
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