Re: QT5 ListBox Problem

[Lee <t.lee.davidson@xxxxxxxxx>]

On 2/27/26 7:19 PM, Benoît Minisini wrote:
> Le 27/02/2026 à 21:25, Lee a écrit :
> > > Does the problem occur with the master branch?
> >
> > Yes, the issue persists on 3.21.99 409093b (master) with all three of those GUI toolkits.
> >
> > It occurs only if ListBox.ScrollBar is set to include Horizontal with either Scroll.Horizontal or Scroll.Both.
>
> I asked because I can't reproduce the problem. Can you send me a little project that shows the bug?

I've discovered that the issue occurs if ListBox.Scrollbar is set to include Scroll.Horizontal *prior* to ListBox.List being 
populated (which would include setting it via the IDE's property sheet). A project that shows the bug is very simple.

Merely add a ListBox to a form, set its Scrollbar property to None so it can be controlled programmatically, and then use just 
this code in FMain.class:

[code]
Public Sub Form_Open()

    ' ListBox1.ScrollBar = Scroll.Both ' Setting it here causes the issue
    ListBox1.List = ["One", "Two", "Three", "Four", "Five", "Six", "Seven", "Eight", "Nine", "Ten"]
    ' ListBox1.ScrollBar = Scroll.Both ' Setting it here does not cause the issue

End
[/code]


--
Lee

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