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comp / comp.lang.python / Re: TkInter Scrolled Listbox class?

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o Re: TkInter Scrolled Listbox class?Cameron Simpson

1
Subject: Re: TkInter Scrolled Listbox class?
From: Cameron Simpson
Newsgroups: comp.lang.python
Date: Mon, 4 Nov 2024 21:21 UTC
References: 1 2
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From: cs@cskk.id.au (Cameron Simpson)
Newsgroups: comp.lang.python
Subject: Re: TkInter Scrolled Listbox class?
Date: Tue, 5 Nov 2024 08:21:28 +1100
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On 04Nov2024 16:32, Ulrich Goebel <ml@fam-goebel.de> wrote:
>I would like to build a class ScrolledListbox, which can be packed
>somewhere in ttk.Frames. What I did is to build not really a scrolled
>Listbox but a Frame containing a Listbox and a Scrollbar:

That's what I would build too.

>class FrameScrolledListbox(ttk.Frame):
> def __init__(self, *args, **kwargs):
> super().__init__(*args, **kwargs)
> # build Listbox and Scrollbar
> self.Listbox = tk.Listbox(self)
> self.Scrollbar = ttk.Scrollbar(self)
[...]
>But it would be a bit nicer to get a class like
>
>class ScrolledListbox(tk.Listbox):
> ...
>
>So it would be used that way:
>
>scrolledListbox = ScrolledListbox(main)
>scrolledListbox.config(...)

Probably you want to proxy various methods to the enclosed widgets.
Possibly you want to do that with parameters in `__init__` also.

Example:

class FrameScrolledListbox(ttk.Frame):
def __init__(self, *frame_args, *, height=None, jump=None, **frame_kw):
super().__init__(*frame_args, **frame_kw)
self.Listbox = tk.Listbox(self, height=height)
self.Scrollbar = ttk.Scrollbar(self, jump=jump)
........

def config(self, *a, **kw):
return self.Listbox.config(*a, **kw)

and so forth for the various listbox methods you want to proxy to the
listbox itself. You could pass scroll specific methods to the scrollbar
as well.

Cheers,
Cameron Simpson <cs@cskk.id.au>

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