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/* $TOG: ValTime.c /main/6 1997/06/18 17:46:26 samborn $ */
/*
* Motif
*
* Copyright (c) 1987-2012, The Open Group. All rights reserved.
*
* These libraries and programs are free software; you can
* redistribute them and/or modify them under the terms of the GNU
* Lesser General Public License as published by the Free Software
* Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* These libraries and programs are distributed in the hope that
* they will be useful, but WITHOUT ANY WARRANTY; without even the
* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
* PURPOSE. See the GNU Lesser General Public License for more
* details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with these librararies and programs; if not, write
* to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
* Floor, Boston, MA 02110-1301 USA
*
*/
/*
* HISTORY
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "XmI.h"
/**********************************************************************
*
* _XmValidTimestamp
* Returns a valid timestamp by generating an event. The time
* that is returned is not 0 or CurrentTime.
* Arguments: w - any widget on the display.
*
**********************************************************************/
Time
_XmValidTimestamp(
Widget w )
{
Window win;
Display *dsp = XtDisplay(w);
XEvent event;
EventMask shellMask;
Atom timeProp = XInternAtom(dsp, XmI_MOTIF_CURRENT_TIME, False);
while (!XtIsShell(w)) w = XtParent(w);
win = XtWindow(w);
if (! ((shellMask = XtBuildEventMask(w)) & PropertyChangeMask) )
XSelectInput(dsp, win, shellMask | PropertyChangeMask);
XChangeProperty(dsp, win, timeProp, timeProp,
8, PropModeAppend, NULL, 0);
XWindowEvent(dsp, win, PropertyChangeMask, &event);
if (!(shellMask & PropertyChangeMask))
XSelectInput(dsp, win, shellMask);
return (event.xproperty.time);
}
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