在 Tkinter 中，框架无法通过鼠标垂直调整大小

Question

我的代码功能正确；但是，使用鼠标时，黄色框架 (rightFrame1) 不会从底部垂直调整大小。我将不胜感激任何有关如何启用黄框垂直调整大小的建议。

from tkinter import * 
from tkinter import ttk 

import tkinter as tk

root = tk.Tk()

#pw1 = PanedWindow(orient ='horizontal') 
splitter1 = tk.PanedWindow(root, handlesize=2, orient=tk.VERTICAL)


splitter1.pack(fill='both', expand=True)

leftFrame1 = tk.Frame(splitter1, bg='green')
rightFrame1 = tk.Frame(splitter1, bg='yellow')

splitter1.add(leftFrame1, width=100, height=50)
splitter1.add(rightFrame1, width=100, height=50)
splitter1.configure(sashrelief = RAISED) 

splitter = tk.PanedWindow(root, handlesize=2, orient=tk.HORIZONTAL)
splitter.pack(fill='both', expand=True)
leftFrame = tk.Frame(splitter, bg='red')
rightFrame = tk.Frame(splitter, bg='blue')
splitter.add(leftFrame, width=50, height=250)
splitter.add(rightFrame, width=50, height=250)
splitter.configure(sashrelief = RAISED) 

root.mainloop()

Answer 1

rightFrame1 = tk.Frame(splitter1, bg='黄色')