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From: RWS@ZERMATT.LCS.MIT.EDU (Robert Scheifler)
Newsgroups: comp.windows.x
Subject: Relative Warp
Message-ID: <871002155711.5.RWS@KILLINGTON.LCS.MIT.EDU>
Date: Fri, 2-Oct-87 15:57:00 EDT
Article-I.D.: KILLINGT.871002155711.5.RWS
Posted: Fri Oct  2 15:57:00 1987
Date-Received: Tue, 6-Oct-87 06:16:41 EDT
References: <8710021815.AA01289@audi.siemens.com>
Sender: daemon@ucbvax.BERKELEY.EDU
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Lines: 73


    Date: Fri, 2 Oct 87 14:15:14 EDT
    From: ellis%cadillac.siemens.com@PRINCETON.EDU (Ellis Cohen)
    Subject: Relative Warp Not Implemented

    VERSION:
	    X11 release 1 - from hesiod - Xsun server
	    on Sun-3/140, monochrome, 12mb, SunOS 3.2

    SYNOPSIS:
	    Relative warp has not been implemented

    DESCRIPTION:

	    Calling
                
		XWarpPointer(dpy, None, None,
			     0, 0, 0, 0,
			     x, y);
		XFlush(dpy);

	    has no effect on the pointer at all, regardless of the value of
	    x and y.

    REPEAT-BY:

	    Try the call with non-zero x and y.

Actually, it has been implemented, but the person who installed the code
for that protocol addition failed to remove some of the old code.  You
should have been getting BadWindow errors back from your test (I
certainly was via CLX).  The following will remedy the situation, but I
will point out that testing it revealed another problem, namely that the
server requires the pointer to be in a visible region of the source
window, *excluding* visible regions of its inferiors.  That is not what
I intended in the protocol spec, but I admit the wording of the spec
easily leads one to that conclusion.  Further discussion on this point
will have to take place before a fix is provided.

*** /tmp/,RCSt1020347	Fri Oct  2 15:39:08 1987
--- events.c	Fri Oct  2 15:32:56 1987
***************
*** 23,29 ****
  ********************************************************/
  
  
! /* $Header: events.c,v 1.108 87/09/09 10:18:23 toddb Exp $ */
  
  #include "X.h"
  #include "misc.h"
--- 23,29 ----
  ********************************************************/
  
  
! /* $Header: events.c,v 1.109 87/10/02 15:31:47 rws Exp $ */
  
  #include "X.h"
  #include "misc.h"
***************
*** 1071,1082 ****
      REQUEST(xWarpPointerReq);
  
      REQUEST_SIZE_MATCH(xWarpPointerReq);
-     dest = LookupWindow(stuff->dstWid, client);
-     if (!dest)
-     {
- 	client->errorValue = stuff->dstWid;
- 	return BadWindow;
-     }
      if (stuff->dstWid != None)
      {
  	dest = LookupWindow(stuff->dstWid, client);
--- 1071,1076 ----