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From: jkm@hp-ptp.HP.COM (Jocelyn_Montgomery)
Newsgroups: comp.windows.x
Subject: XUngrabPointer isn't
Message-ID: <2270001@hp-ptp.HP.COM>
Date: 24 Aug 89 22:31:46 GMT
Organization: HP Pacific Technology Park - Sunnyvale, Ca.
Lines: 44

I am writing an application in which I want to grab the pointer, do something,
then ungrab the pointer.  All goes well with the grab but when I try to 
ungrab the pointer, it won't.  I am getting a GrabInvalidTime value returned
from XUngrabPointer, but I am giving it CurrentTime for both the grab and
ungrab.  I am running on an HP 9000/360 with 6.5 
Any help is greatly appreciated!

Here is the code:

	char buf[20];
	int returnval;
	char *display_name = NULL;
	Cursor cursor;
	XEvent event;
	
	/* get display pointer */
	display = XOpenDisplay (display_name);
	
	/* create question mark cursor */
	cursor = XCreateFontCursor(display, 92);
	
	/* change cursor to question mark */
	if ((returnval = XGrabPointer(display, XtWindow(questionMarkPB), True, 
				      ButtonPressMask|ButtonReleaseMask| 
				      OwnerGrabButtonMask, GrabModeAsync, 
				      GrabModeAsync, None, cursor, CurrentTime)) != 0)
	   printf("grab error = %s\n", XGetErrorText(display, returnval, buf, sizeof (buf)));

	XMaskEvent(display,ButtonPressMask, &event);
	/* do something */
	returnval = XUngrabPointer(display,CurrentTime);
	printf("ungrab return = %d\n", returnval);	
	sleep(3); /* these are here so I don't hang my program when
		     it doesn't ungrab */
	exit(0);
}

The printf returns:  ungrab return = 2.

Thanks,

Jocelyn Montgomery
Hewlett Packard
jocelyn@hp-ptp.HP.COM