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From: bruner@uicsrd.csrd.uiuc.edu (John Bruner)
Newsgroups: comp.windows.x
Subject: XtGrabButton problem
Keywords: XtGrabButton
Message-ID: <1990Mar21.152058.8340@ux1.cso.uiuc.edu>
Date: 21 Mar 90 15:20:58 GMT
Sender: usenet@ux1.cso.uiuc.edu (News)
Reply-To: bruner@uicsrd.csrd.uiuc.edu (John Bruner)
Organization: CSRD, Univ. of Illinois
Lines: 20

I apologize in advance for asking something which has probably been asked
before.  (I'm not a regular reader of this newsgroup.)  If this has come
up before, please respond to me by mail.

The implementation of XtGrabButton in X11R4 (at least, in the one we have
here at CSRD-UIUC) does not agree with the description in the Intrinsics
manual.  Specifically, the calling sequence is given in the manual as

	void XtGrabButton(widget, button, modifiers, owner_events,
			  event_mask, pointer_mode, keyboard_mode,
			  confine_to, cursor)

However, the implementation in "mit/lib/Xt/PassivGrab.c" (no RCS version
number on our copy, sorry) expects "event_mask" to follow "keyboard_mode"
rather than preceeding "pointer_mode".  This looks like an error in
implementation to me, because the documented order is consistent with
XGrabButton.
--
John Bruner	Center for Supercomputing R&D, University of Illinois
	bruner@uicsrd.csrd.uiuc.edu	(217) 244-4476