Tkinter - 窗口丟失焦點事件

Question

使用.bind方法時，窗口是否丟失了焦點並且可以綁定到tkinter窗口，是否有某些事件？

Answer 1

您正在尋找的活動是<FocusOut>。

import tkinter as tk 

def on_focus_out(event): 
    if event.widget == root: 
     label.configure(text="I DON'T have focus") 

def on_focus_in(event): 
    if event.widget == root: 
     label.configure(text="I have focus") 

root = tk.Tk() 
label = tk.Label(width=30) 
label.pack(side="top", fill="both", expand=True) 

root.bind("<FocusIn>", on_focus_in) 
root.bind("<FocusOut>", on_focus_out) 

root.mainloop()