Tkinter: How to get event listener when entry box is deselected?

Question

Just the title. I have an entry box that needs to be rounded to 10, but I want it to happen the moment another entry box is selected.

The only event listener I can find to do with tkinter entry boxes is attatching a StringVar and tracing it, but that doesn't seem to do what I want here as I don't want the changes to happen while typing.

Answer 1

You are looking for the <FocusOut> event.

def some_func(event):
    print("The entry has lost focus")
entry = tk.Entry(...)
entry.bind("<FocusOut>", some_func)