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From: Ulrich Goebel <ml@fam-goebel.de>
Newsgroups: comp.lang.python
Subject: TkInter Scrolled Listbox class?
Date: Mon, 4 Nov 2024 16:32:48 +0100
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Hi,

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:

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)
        #
        # configure these two
        self.Listbox.config(yscrollcommand=self.Scrollbar.set)
        self.Scrollbar.config(command=self.Listbox.yview)
        #
        # pack them in Frame
        self.Listbox.pack(side=tk.LEFT, fill=tk.BOTH)
        self.Scrollbar.pack(side=tk.RIGHT, fill=tk.BOTH)

That works, so instances of FrameScrolledListbox can be packed and the tk.Listbox itself is accessible via an attribute:

frmScrolledListbox = FrameScrolledListbox(main)
frmScrolledListbox.Listbox.config(...)

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(...)

Is that possible? The problem which I can't handle is to handle the Frame which seems to be needed to place the Scrollbar somewhere.

Best regards
Ulrich


-- 
Ulrich Goebel <ml@fam-goebel.de>