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From: rick@prodnet.la.locus.com (Richard Petkiewicz)
Newsgroups: comp.windows.x.motif
Subject: Freezing the Scrollbar
Message-ID: <25651@oolong.la.locus.com>
Date: 22 Jun 91 00:55:26 GMT
Sender: rick@locus.com
Lines: 24

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I need to find out if there is any way to temporarily turn off scrollbar
processing.  I have an application where it may sometimes take a while
to get the data I need to display when a scrollbar moves.  I would like
to display a "watch" cursor and halt scrollbar processing while the
application is waiting for data.

I don't want to "freeze" the whole application by waiting for the data
in the callback.

I tried to use XtSetSensitive to make the scrollbar insensitive to
input, however that does not prevent scrollbar changes due to auto-repeating.
In fact, if the mouse button was pressed in the increment or page-increment
area, turning off sensitivity will induce auto-repeating even if the
mouse button is released, because the release is never seen.

I've considered moving the scrollbar back to where I want it, but my
guess is that that approach would produce a "jittering" scrollbar
effect.

I am currently using Motif 1.0, but plan to move to Motif 1.1 in the
relatively near future.

I would appreciate any suggestions on how best to handle this situation.