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我正在编写一个小程序，其目的是在窗口大小更改时运行调整大小方法。为此，我使用了toplevel.bind("<Configure>", self.resize). 虽然这确实适用于调整大小，但该方法会被调用数百次：滚动时、使用某些按钮时，即使窗口大小不会因任何这些操作而改变。如何绑定事件，以便仅在更改窗口大小时调用它？

import tkinter as tk

def resize(event):
    print("widget", event.widget)
    print("height", event.height, "width", event.width)

parent = tk.Toplevel()
canvas = tk.Canvas(parent)
scroll_y = tk.Scrollbar(parent, orient="vertical", command=canvas.yview)
scroll_x = tk.Scrollbar(parent, orient="horizontal", command=canvas.xview)
frame = tk.Frame(canvas)

# put the frame in the canvas
canvas.create_window(0, 0, anchor='nw', window=frame)
# make sure everything is displayed before configuring the scrollregion
canvas.update_idletasks()

canvas.configure(scrollregion=canvas.bbox('all'), 
                yscrollcommand=scroll_y.set,
                xscrollcommand=scroll_x.set)

scroll_y.pack(fill='y', side='right')
scroll_x.pack(fill='x', side='bottom')
canvas.pack(fill='both', expand=True, side='left')

parent.bind("<Configure>", resize)

parent.mainloop()

输出：

widget .!toplevel
height 200 width 200
widget .!toplevel.!scrollbar …