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From: jerryl@is.Morgan.COM (Jerry Liebelson)
Newsgroups: comp.windows.x.motif
Subject: Re: Freezing the Scrollbar
Message-ID: <9106242251.AA24541@24541>
Date: 24 Jun 91 22:47:05 GMT
References: <910624112739.244@sony>
Sender: daemon@ucbvax.BERKELEY.EDU
Distribution: inet
Organization: The Internet
Lines: 61

> 
> > -------
> > 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
>
> This sounds like a good candidate for sending an enhancement request
> to OSF.  In the meantime I suspect your best bet is to unmap the scrollbar
> and hope that it doesn't get to annoying.  (This appears to be what the
> FileSelection Dialog does in 1.1).
> 

Actually, we had to do something similar because we wanted to store
hidden data in each row of a XmList but not have the users be able to
scroll and see it.  The key to doing this is simple, though VERY KLUDGY:
Just get the particular scrollbar from the widget, make it insensitive
and invisible: (On monochrome SLC's this code is still missing something,
because a faint, partial outline of the scrollbar remains; but on color
displays, the scrollbar is completely invisible.)

    /* ... */

	register int i;
	Arg argList[10];
	Widget list;  /* an XmList */
	Widget listContainerWidget; /* a widget containing the XmList */
	Widget hScrollBar; 
	Pixel bg;

	/* Get the horizontal scrollbar of the XmList */
	i=0;
	XtSetArg (argList[i], XmNhorizontalScrollBar, &hScrollBar); i++;
	XtGetValues (list, argList, i);

	/* Get the background color of the widget containing the XmList */
	i=0;
	XtSetArg (argList[i], XmNbackground, &bg); i++;
	XtGetValues (listContainerWidget, argList, i);

	/* Make the scrollbar invisible */
	i=0;
	XtSetArg (argList[i], XmNsensitive, False); i++;
	XtSetArg (argList[i], XmNbackground, bg); i++;
	XtSetArg (argList[i], XmNforeground, bg); i++;
	XtSetArg (argList[i], XmNtroughColor, bg); i++;
	XtSetArg (argList[i], XmNshadowThickness, 0); i++;
	XtSetArg (argList[i], XmNhighlightThickness, 0); i++;
	XtSetArg (argList[i], XmNbottomShadowColor, bg); i++;
	XtSetArg (argList[i], XmNtopShadowColor, bg); i++;
	XtSetValues (hScrollBar, argList, i);
    /* ... */


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|        Jerry Liebelson         |      EMAIL: jerryl@is.morgan.com          |
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