[5791] in java-interest
Re: HorScrollBar Warning
daemon@ATHENA.MIT.EDU (Greg Ewing)
Mon Feb 26 20:02:35 1996
Date: Tue, 27 Feb 1996 09:31:56 +1100
From: grege@optimation.com.au (Greg Ewing)
To: java-interest@java.sun.com
Cc: sigristg@vptt.ch
> From NewsGroup_comp-lang-java Fri Feb 23 08:18 EST 1996
> From: NewsGroup_comp-lang-java
> >From: sigristg@vptt.ch (Sigrist G fe51)
> Subject: HorScrollBar Warning
> Date: 22 Feb 1996 10:01:00 GMT
> Nntp-Posting-Host: gdv019.vptt.ch
> X-Newsreader: TIN [version 1.2 PL2]
>
> I get this warning all the time :
> Warning:
> Name: HorScrollBar
> Class: XmScrollBar
> The specified scrollbar value is greater than the maximum
> scrollbar value minus the scrollbar slider size.
>
> I would like to know where it comes from and why ?
>
> My TextAreas do not seem to exceed any special length...
>
> Thanks,
> Gab
>
> --
> ************************************************************
> Gabriel Sigrist e-mail : sigristg@vptt.ch
> Swiss TELECOM PTT phone : +41 31 338 40 57
> Ostermundigen Str 93 fax : +41 31 338 39 62
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> ************************************************************
>
Gabriel,
This is an X message. I used to get the same warning when using
scrollbars in Eiffel Vision, and it had me confused for a while.
I solved it by trial and error - the various scrollbar variables
(value, minimum, maximum, slider-size etc) must be initialised
in a certain order otherwise the warning will appear.
Using Eiffel, the order had to be i. value, ii. slider_size,
iii. minimum/maximum, v. granularity.
Looking at the Java api I see that there is only one routine
`setValues()' which sets i. value ii. visible iii. maximum iv.
minimum. I assume `visible' is a composite of the Eiffel terms
`sliderSize' and `granularity'. This ordering looks reasonable so
I suggest you check that you have done a `setValues()' to initialise
everything.
Now, if you haven't implemented your own Scrollbar but are simply
using a TextArea, I'm not sure what could be causing the problem.
GREG
grege@optimation.com.au
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