scrollable_frame.py

# scrollable_frame.py
import tkinter as tk

# main window class to provide display area with scrollbars
class ScrollableFrame(tk.Frame):
    def __init__(self, parent, *args, **kwargs):
        super().__init__(parent, *args, **kwargs)
        
        # create canvas to host scrollbar
        self.canvas = tk.Canvas(self, bg="lightgray")
        self.scrollbar = tk.Scrollbar(self, orient="vertical", command=self.canvas.yview)
        self.scrollable_frame = tk.Frame(self.canvas, bg="lightgray")

        self.canvas.create_window((0, 0), window=self.scrollable_frame, anchor="nw")
        self.canvas.configure(yscrollcommand=self.scrollbar.set)

        # define layout
        self.scrollbar.pack(side="right", fill="y")
        self.canvas.pack(side="left", fill="both", expand=True)

        # Allow the scrollable_frame to expand properly in width
        self.scrollable_frame.bind("<Configure>", lambda e: self.canvas.configure(scrollregion=self.canvas.bbox("all")))
        self.canvas.bind("<Configure>", lambda e: self.canvas.itemconfig(self.canvas.create_window((0, 0), window=self.scrollable_frame, anchor="nw", width=e.width)))

    def get_scrollable_frame(self):
        return self.scrollable_frame