将tkinter的Optionmenu标题设置为字符串和StringVar

问题描述 投票:0回答:1

所以我有一个Optionmenu标题“选项”和一些选项。每次我选择变量1时,标题都会改变。如何在更改后将其设置为字符串“options”和变量的值?例如:“选项 - 音乐关闭”我试过这个,但它不起作用:

variable1 = StringVar() 
variable1.set("something",variable1)

谢谢。

编辑:这是我的代码的完整版本:

            options = Menubutton(frame,textvariable = options3,indicatoron=True,borderwidth=1, relief="raised", width=20)
            options.grid(row=3,column=2)#options2 [0] options3
            main_menu = Menu(options,tearoff=False)
            options.configure(menu=main_menu)
            get_options3= options3.get()
            neededstring = string+str(options3)
            print("needed str", neededstring)
            options3.set('options - ' +options3.get())
            for item in (("Answer with text", "plain text", "only numbers", "only letters"),
             ("Answer with Checkbuttons", "red", "green", "blue"), ("Answer with Radiobuttons", "one option can be chosed")
                         ):
                menu = Menu(main_menu, tearoff=False)
                main_menu.add_cascade(label=item[0], menu=menu)
                for value in item[1:]:
                    menu.add_radiobutton(value=value, label=value, variable=options3)
python python-3.x tkinter
1个回答
0
投票

如果跟踪您提供给OptionMenu的StringVar,则只要更改选项,就可以将字符串添加到前面。这将创建一个带有OptionMenu的窗口,该窗口执行此操作:

import tkinter as tk

root = tk.Tk()

# function to add 'options - ' to the front of the selected option
def change_selected(var1):
    var1.set('options - %s' % var1.get())

# variable
var1 = tk.StringVar(root)
var1.set('1')

# create menu
options = tk.OptionMenu(root, var1, '1', '2', '3')
options.pack()

# trace variable for changes
var1.trace('w', lambda *args: change_selected(var1))

root.mainloop()
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