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From: klee@wsl.dec.com (Ken Lee)
Newsgroups: comp.windows.x
Subject: Re: XGrabPointer bug in R4?
Message-ID: <2743@bacchus.dec.com>
Date: 13 Feb 90 20:48:51 GMT
References: <1990Feb13.031943.3974@world.std.com>
Sender: news@decwrl.dec.com
Reply-To: klee@decwrl.dec.com
Organization: DEC Western Software Laboratory
Lines: 19

In article <1990Feb13.031943.3974@world.std.com>, madd@world.std.com
(jim frost) writes:
> XGrabPointer, using owner == True, returns BadValue errors when an
> event_mask is given.  The function acts as expected (sending events
> given in the event_mask to the specified window) even though it
> returns this error.  This error was not returned in R3; behavior
> between the two versions (aside from the error return) is identical.

The Xlib manual says the event mask must be "the bitwise inclusive OR
of the valid pointer event mask bits".  Valid events are listed under
"POINTEREVENT" on p. 349 of Scheifler's DP book.  Your event mask
probably contains invalid events.  R3 sample servers incorrectly
ignored invalid events.  R4 sample servers correctly give you a bad
value error.

Ken Lee
DEC Western Software Laboratory, Palo Alto, Calif.
Internet: klee@wsl.dec.com
uucp: uunet!decwrl!klee