[Octave-bug-tracker] [bug #60951] ListboxTop property has no effect

[anonymous]

URL:
  <https://savannah.gnu.org/bugs/?60951>

                 Summary: ListboxTop property has no effect
                 Project: GNU Octave
            Submitted by: None
            Submitted on: Wed 21 Jul 2021 03:05:07 PM UTC
                Category: GUI
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Incorrect Result
                  Status: None
             Assigned to: None
         Originator Name: Paul Mennen
        Originator Email: paul@mennen.org
             Open/Closed: Open
                 Release: 6.3.0
         Discussion Lock: Any
        Operating System: Microsoft Windows

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Details:

Consider the following script:


h = uicontrol('style','listbox','position',[20 20 120 300],...
     'backgroundcolor','black','foregroundcolor','yellow',...
     'string',reshape(sprintf(' This is Line %2d',1:60),16,60)');
set(h,'value',30,'listboxTop',20);


When I run this in Matlab I get the 1st attached figure. Note that the 30th
line is highlighted (because of the 'value' parameter) and that the 20th line
is shown at the top of the listbox (because of the 'listboxTop' parameter).

When I run this in Octave I get the 2nd attached figure. Again the 30th line
is highlighted as expected, although the highlighting is done in a strange way
that makes it difficult to see the text under the highlight. That's awkward,
but the more significant problem is that the 15th line is at the top, not the
20th line as expected. Further experiments show that the listboxTop parameter
is always ignored and that the figure does not change no matter what value I
set it to. This is a pretty useful parameter, and I hope Octave will support
it in a future version.

~Paul



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File Attachments:


-------------------------------------------------------
Date: Wed 21 Jul 2021 03:05:08 PM UTC  Name: listbox2.png  Size: 32KiB   By:
None

<http://savannah.gnu.org/bugs/download.php?file_id=51677>
-------------------------------------------------------
Date: Wed 21 Jul 2021 03:05:07 PM UTC  Name: listbox1.png  Size: 30KiB   By:
None

<http://savannah.gnu.org/bugs/download.php?file_id=51676>

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