Re: [ros-dev] kbswitch update

[Colin Finck]

Hi,

Let me at least answer one of your questions before these get lost in
the discussion.

Am 03.12.2015 um 23:03 schrieb Hans-Peter Diettrich:
>   Q: Is kbswitch notified of focus changes, and if so:
> how? 
As you have already found out, kbswitch has been implemented as a
system-wide keyboard layout switcher and not a per-application one.
Therefore, it doesn't care about focus at all.

A proper per-application keyboard layout switcher as part of the
Language Bar should also be implemented as a shell extension instead of
a tray icon to be as flexible as the Windows original.
To get notified of focus changes, an application should probably hook
the EVENT_SYSTEM_FOREGROUND event using the SetWinEventHook API. The
rest can be done using calls to GetForegroundWindow,
GetWindowThreadProcessId and GetKeyboardLayout as you already suggested.

Unfortunately, I lack deeper experience with keyboard layout internals,
so this is all I can tell you for now.
You may find someone in #reactos or #reactos-dev on IRC with more
expertise on this.

Cheers,

Colin