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Volume 6A: Motif Programming Manual
book

Volume 6A: Motif Programming Manual

by David Brennan, Dan Heller, Paula Ferguson
September 1993
Intermediate to advanced content levelIntermediate to advanced
1014 pages
28h 26m
English
O'Reilly Media, Inc.
Content preview from Volume 6A: Motif Programming Manual
* becomes visible.
*/
void
ForceUpdate(w)
Widget w; /* This widget must be visible before the function returns */
{
Widget diashell, topshell;
Window diawindow, topwindow;
XtAppContext cxt = XtWidgetToApplicationContext (w);
Display *dpy;
XWindowAttributes xwa;
XEvent event;
/* Locate the shell we are interested in */
for (diashell = w; !XtIsShell (diashell); diashell = XtParent (diashell))
;
/* Locate its primary window's shell (which may be the same) */
for (topshell = diashell; !XtIsTopLevelShell (topshell);
topshell = XtParent (topshell))
;
/* If the dialog shell (or its primary shell window) is not realized,
* don't bother ... nothing can possibly happen.
*/
if (XtIsRealized (diashell) && XtIsRealized (topshell)) {
dpy = XtDisplay (topshell);
diawindow = XtWindow (diashell);
topwindow = XtWindow (topshell);
/* Wait for the dialog to be mapped. It's guaranteed to become so */
while (XGetWindowAttributes (dpy, diawindow, &xwa) &&
xwa.map_state != IsViewable) {
/* ...if the primary is (or becomes) unviewable or unmapped,
* it's probably iconic, and nothing will happen.
*/
if (XGetWindowAttributes (dpy, topwindow, &xwa) &&
xwa.map_state != IsViewable)
break;
/* we are guaranteed there will be an event of some kind. */
XtAppNextEvent (cxt, &event);
XtDispatchEvent (&event);
}
}
/* The next XSync() will get an expose event. */
XmUpdateDisplay (topshell);
}
This routine makes sure that a dialog is visible by waiting for the window of the dialog to be mapped to the screen.
22.2.5 ...
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Publisher Resources

ISBN: 9780596000431