#155 Reset focus to embedded windows (bug fix)

[Matthias Kraft]

This patch provides a fix for handling bogus FocusOut
events as can be observed by using an embedded
application on certain X11 Window managers.

This may be connected to the bugs #740565 and/or #480158.

This patch is against Tk8.4.1 and confirmed to work on
the following Unix systems:
SLES 7 + 8 (ia32);
RHEL 2.1 + 3.0 (ia32);
SLES 8 (s390);
SUN Solaris 5.7, 5.8, 5.9 (Sparc);
AIX 4.3, 5.1, 5.2;
HPUX 11+ (PA-Risc);
Tru64 5.1;

Not tested on other operating systems. This patch was
originally developed by krischan (SF id).

[Matthias Kraft]

reset focus to the embedded window

[Jeffrey Hobbs]

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Can I get more bg on this patch? It doesn't appear to
resolve the named related bugs, but I would like to have
some understanding of what this does solve in case they
could be closely tied.

[Matthias Kraft]

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We had focus problems when embedding another Tk application
into a container. Under some circumstances some
Windowmanagers send FocusOut events to the embedding
application, and it was not possible to get the focus to the
embedded application.

I'll send Krischan an email to have a look at this - maybe
he can explain better, what happend.