如何让tkinter mainloop等待matplotlib单击事件

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

root = tk.Tk()
fig = Figure()

canvas = FigureCanvasTkAgg(fig, master=root)
canvas.draw()
canvas.get_tk_widget().pack(side=tk.TOP, fill=tk.BOTH, expand=1)

def on_click(event):
    # 处理单击事件的逻辑
    pass

fig.canvas.mpl_connect('button_press_event', on_click)

root.mainloop()