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From: rick@pcrat.uucp (Rick Richardson)
Newsgroups: comp.windows.x
Subject: Running Event Processing from a callback
Message-ID: <1990Aug9.162333.6049@pcrat.uucp>
Date: 9 Aug 90 16:23:33 GMT
Organization: PC Research, Inc.
Lines: 36


This group is so full of useful information, I can't help
but ask another question:

Is it safe to run a pseudo-XtAppMainLoop() from a callback
that was itself triggered by a XtAppMainLoop()?  If safe,
are there any potentially ugly side-effects?

People may wonder why I want to do this.  In the context of
the entire application, there may be stylistic reasons to
want this.  I'm not 100% sure how I may end up proceeding,
and I just need to know my valid options.

E.G.:

main()
{
	- create command button with callback to button_pressed()
	- XtAppMainLoop(Context);
}

button_pressed()
{
	XtPopup(PopupShell);
	StayInPopup = 1;	/* When done, popup will set to 0 */
	while (StayInPopup)
	{
		XEvent	event;

		XtAppNextEvent(Context, &event);
		XtDispatchEvent(&event);
	}
	XtPopdown(PopupShell);
}
-- 
Rick Richardson - PC Research, Inc., uunet!pcrat!rick, (201) 389-8963