访问OptionMenu项目- Tkinter

Question

我有四个OptionMenu，每个OptionMenu都填充了一个条目列表(每个菜单都一样)。

from tkinter import *

def selected (event):
    print (clicked.get())

window = Tk()

entries = ["a", "b", "c", "d"]

for i in range (4):
    window.rowconfigure (i, minsize = 5)
    a_frame = Frame (master = window)
    a_frame.grid (row = i, column = 0, padx = 1, pady = 1)
    clicked = StringVar()
    clicked.set (entries[0])
    a_menu = OptionMenu (a_frame, clicked, *entries, command = selected)
    a_menu.pack()

window.mainloop()

我试图访问从每个OptionMenu中选择的值，但只打印底部OptionMenu中的值。当我从其他下拉菜单中选择一些值时，操作是“检测到的”，但只打印底部OptionMenu中的值。如果你尝试运行上面的代码，你会很容易理解我的意思。如何访问从每个OptionMenu中选择的每个值？首先要感谢大家！

Answer 1

OptionMenu构造函数：

OptionMenu(父级，变量，choice1，choice2，...)

from tkinter import Tk, StringVar, OptionMenu

def callback(arg):
    print(arg)

root = Tk()
option = StringVar()
op = OptionMenu(root, option, 'a', 'b', 'c', 'd', command=callback)
op.grid()
option.set('a')
root.mainloop()

这是你可以开始的基础。当调用回调函数时，它将您的选择作为参数传递，并且只将参数打印到控制台。

希望你现在已经有了一个基本的了解。

因此，在本例中，您需要打印参数，而不是"print (clicked.get())“

试试这个：

from tkinter import *

def selected (event):
    print (event)

window = Tk()

entries = ["a", "b", "c", "d"]

for i in range (4):
    window.rowconfigure (i, minsize = 5)
    a_frame = Frame (master = window)
    a_frame.grid (row = i, column = 0, padx = 1, pady = 1)
    clicked = StringVar()
    clicked.set (entries[0])
    a_menu = OptionMenu (a_frame, clicked, *entries, command = selected)
    a_menu.pack()

window.mainloop()