Question

我试图通过将变量传递给函数来使Optionmenu-Widget工作当用户单击菜单中的选项时，我需要传递两个变量。

    self.frameX = Frame(self.frameTwo, background="red", width= 370, height=35)
    self.frameX.pack_propagate(0)
    self.frameX.pack(side=TOP)

    self.names = [1,2,3,4,5]

    #Just for demonstration, some random number i 
    #should be saved and passed onchange optionmenu.
    i = random.randint(0, 10)

    self.var = StringVar()
    self.var.set("Numbers")

    #When the user selects an option, this function should 
    #pass i and the variable, which is what the user selected to the callback function.
    self.var.trace("w", lambda i=i:  self.callback(i, self.var.get()))

    self.options = OptionMenu(self.frameX, self.var, *self.names)
    self.options.place(x=180, y=5)
    self.options.pack()

    self.frameX.pack()

def callback(self, n, g):
    print(n)
    print(g)

如果有人能帮助我解决这个问题，那将会很棒并且很受欢迎。

Answer 1

如果我理解正确你想要做这样的事情：

import random
from Tkinter import *

def callback(sv, i):
    print sv.get() + str(i);

master = Tk()

i = random.randint(0, 10)

variable = StringVar(master)
variable.set("one")  # default value
variable.trace("w", lambda name, index, mode, sv=variable: callback(sv, i))
w = OptionMenu(master, variable, "one", "two", "three")
w.pack()

mainloop()

正如您所看到的，我传递了stringVar本身，因此我可以在回调中调用get()和其他函数

更改OptionsMenu-Value打印，例如

>>two6
>>one6
>>three6

将变量和optionmenu选择传递给方法

1 个答案: