[Tkinter] Treeview expand button size

[shamnadinn]

I have tried by referring the example https://stackoverflow.com/questions/1652...pect-ratio
but still the expandbutton has no change in size.

---

This is my code

import tkinter as tk
from ttkwidgets import CheckboxTreeview
#from Tkconstants import *
r=tk.Tk()

def set_aspect(content_frame, pad_frame, aspect_ratio):
    # a function which places a frame within a containing frame, and
    # then forces the inner frame to keep a specific aspect ratio

    def enforce_aspect_ratio(event):
        # when the pad window resizes, fit the content into it,
        # either by fixing the width or the height and then
        # adjusting the height or width based on the aspect ratio.

        # start by using the width as the controlling dimension
        desired_width = event.width
        desired_height = int(event.width / aspect_ratio)

        # if the window is too tall to fit, use the height as
        # the controlling dimension
        if desired_height > event.height:
            desired_height = event.height
            desired_width = int(event.height * aspect_ratio)

        # place the window, giving it an explicit size
        content_frame.place(in_=pad_frame, x=0, y=0, 
            width=desired_width, height=desired_height)

    pad_frame.bind("<Configure>", enforce_aspect_ratio)

pad_frame = tk.Frame(borderwidth=0, background="bisque", width=200, height=200)
pad_frame.grid(row=0, column=0, sticky="nsew", padx=10, pady=20)
content_frame=tk.Frame(r,borderwidth=5,relief="groove", background="blue")
tk.Label(content_frame,text='content').pack()
set_aspect(content_frame, pad_frame, aspect_ratio=2.0/1.0) 
tree = CheckboxTreeview(content_frame, selectmode = "extended", show="tree", padding=25)
tree.pack(fill='both')
r.rowconfigure(0, weight=1)
r.columnconfigure(0, weight=1)

tree.insert("", "end", "1", text="1")
tree.insert("1", "end", "11", text="11")
tree.insert("1", "end", "12",  text="12")
tree.insert("11", "end", "111", text="111")
tree.insert("", "end", "2", text="2")

r.mainloop()