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From: RWS@ZERMATT.LCS.MIT.EDU (Robert Scheifler)
Newsgroups: comp.windows.x
Subject: Xv11: ButtonPress and ButtonRelease
Message-ID: <870831185246.0.RWS@KILLINGTON.LCS.MIT.EDU>
Date: Mon, 31-Aug-87 18:52:00 EDT
Article-I.D.: KILLINGT.870831185246.0.RWS
Posted: Mon Aug 31 18:52:00 1987
Date-Received: Fri, 4-Sep-87 07:24:20 EDT
References: <2766421440-4064329@Sierra>
Sender: daemon@ucbvax.BERKELEY.EDU
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    Date: Mon, 31 Aug 87  13:24:00 CDT
    From: Kerry Kimbrough <Kimbrough%dsg%ti-csl.csnet@RELAY.CS.NET>

    If a client selects both ButtonPress and ButtonRelease events for window W, and
    receives a ButtonPress event with W as the "source", is he guaranteed also to
    receive a ButtonRelease event with W as the "source" (regardless of the position
    of the pointer at the time of the button's release)?

Yes (provided he doesn't release the grab in the mean time).

							  Would this occur even if
    the client had *not* selected ButtonRelease events for window W?

Yes.

								      In the case
    that the pointer is in window Y at the time of the button's release, is a
    ButtonRelease event with Y as the "source" also sent to interested clients? 

No, because the button press caused a grab.