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From: asente@adobe.com (Paul Asente)
Newsgroups: comp.windows.x
Subject: Re: How do I block X events?
Message-ID: <8379@adobe.UUCP>
Date: 19 Nov 90 21:26:48 GMT
References: <1990Nov15.190220.20413@csug.rdg.ac.uk>
Sender: news@adobe.COM
Organization: Adobe Systems Inc.
Lines: 34

In article <1990Nov15.190220.20413@csug.rdg.ac.uk> ac1@csug.cs.rdg.ac.uk (Andrew Cunningham) writes:
>I am writing an X application using the Motif toolkit (on HP-UX 7.0, if it
>makes a difference).  The program has to perform a computationally intensive
>task from time to time, and I'd like to be able to block the user interface
>while this is going on.  Ideally I want to 
>
>	a) Display an hourglass cursor over the whole application

Use Xlib for this.

>	b) Ignore any mouse/keyboard events until the operation is 
>	   complete.

Call

	XtSetSensitive(your_root_shell_widget, FALSE);

when you want to start ignoring events.  Call

	XtSetSensitive(your_root_shell_widget, TRUE);

to start processing them again.  This will ignore mouse and keyboard events
while still passing through expose events and the like.  Be sure to do

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

periodically during your task to process expose events.  Also do it before
resensitizing your user interface to make sure any queued-up mouse or
keyboard events are thrown away.

	-paul asente
		asente@adobe.com	...decwrl!adobe!asente