ttk.Entry.select_range（）可与Button一起使用，但不能在python / tkinter中使用ttk.Button吗？

Question

Can some one please explain why entry.select_range() works with a Button, but not a ttk.Button?

from tkinter import *
from tkinter import ttk

root = Tk()

entry = ttk.Entry(root)
entry.pack()

#This works
button = Button(root, text="Select your text", command=lambda:
                    entry.select_range(0, END))

#but this doesn't
##button = ttk.Button(root, text="Select your text", command=lambda:
##                    entry.select_range(0, END))

button.pack()

root.mainloop()

Answer 1

This answer from Google Group says,

However, on Windows (only) the selection will only become visible when the entry gets the focus.

and also this page about ttk button says,

By default, a ttk.Button will be included in focus traversal ... To remove the widget from focus traversal, use takefocus=False

So you need to add takefocus option to ttk.Button .

button = ttk.Button(root, takefocus=False, text=...)