如何在Tkinter中获取matplotlib子图上的按钮？

import tkinter as tk
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg
from matplotlib.figure import Figure

root = tk.Tk()
fig = Figure(figsize=(5, 4), dpi=100)

canvas = FigureCanvasTkAgg(fig, master=root)
canvas.draw()
ax = fig.add_subplot(111)
button = tk.Button(root, text="按钮")

def on_button_click():
    print("按钮被点击了！")

button.config(command=on_button_click)
ax_button = fig.add_axes([0.7, 0.8, 0.1, 0.1])
ax_button_button = canvas.mpl_connect('button_press_event', on_button_click)
ax_button_button.set_visible(False)
ax_button_button.set_picker(True)
ax_button_button.set_cursor(cursors.Hand)

canvas.get_tk_widget().pack()
button.pack()