Tkinter (13) 选项菜单部件 OptionMenu

选项菜单部件的创建及其选项

该部件为Menubutton与Menu两部件在特定参数选项下所订立的部件

import tkinter as tk
parent = tk.Tk()
message = tk.OptionMenu(parent, variable, choice1, choice2, ...)

范例视窗及代码

import tkinter as tk

def func(select):
    print(f'You select {select.get()}')

root = tk.Tk()
root.wm_title("Message Demo")

items = ('Train', 'Plane', 'Boat')
select = tk.StringVar()
select.set('Selection')
font = ('Courier New', 20, 'bold')

option_menu = tk.OptionMenu(root, select, *items)
option_menu.config(font=font, width=10)
option_menu.pack()

select.trace_add("write", lambda *_, select=select:func(select))

root.mainloop()

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