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From: denault@hale.ifa.hawaii.edu (Tony Denault)
Newsgroups: comp.windows.x
Subject: Need help with XView Scrollbars
Keywords: XView, scrollbar
Message-ID: <8754@uhccux.uhcc.Hawaii.Edu>
Date: 28 Jul 90 03:09:42 GMT
Sender: news@uhccux.uhcc.Hawaii.Edu
Organization: Institute For Astronomy, Hawaii
Lines: 22


I need help with dealing with scrollbars in XView. I have a canvas
with scrollbars. I defined the paint window to be the same size as
the canvas subwindow. My redraw procedure determines which portion
of the data needs to be displayed based on some internal parameters. 
My redraw procedure changes the OBJECT_LENGTH, VIEW_LENGTH, ect..,
to match the scrollbars to the drawing.

What I need to know is:

How can I be notified when the user interacts with the scrollbar?
I need to read it's new postion. Update my internal variable and
call my canvas redraw procedure. I don't want XView to scroll my
canvas display. 

Thanks in advance, 
Tony D.
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| Tony Denault, Institute for Astronomy,  |  denault@hale.ifa.hawaii.edu |
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