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From: kmy@mel.dit.csiro.au (Kid Mun Yap)
Newsgroups: comp.windows.x
Subject: Synchronizing with Xt (XtPopup).
Keywords: XtPopup Xt events Athena
Message-ID: <1991Jan25.033150.12714@mel.dit.csiro.au>
Date: 25 Jan 91 03:31:50 GMT
Sender: usenet@mel.dit.csiro.au (usenet mail contact)
Reply-To: kmy@mel.dit.csiro.au (Kid Mun Yap)
Organization: CSIRO DIT (Melb.)
Lines: 24


Hi everybody,

Does anyone know why flushing events using :

while (XtAppPending(app_context))
	XtAppProcessEvent(app_context, XtIMAll);

immediately after an XtPopup(widget, ...) does not flush all the events
associated with the widget and its descendants but does so if a delay
is introduced in between.

The popup widget has a label widget as a child, doing the above without the
delay in between causes the popup window to appear without the contents of
of the label widget. Only on returning to XtAppMainLoop does the contents
appear. This seem to suggest that the expose event which is to cause the
contents of the label widget to be drawn is not being sent immediately
the window is mapped. Is this right? If so, is there a way to force an
expose event into the queue.

The above mentioned widgets are all from the Athena widget set.

Thanks in advance for any help,
K M Yap