CODEWITHSUNDEEP
functiontkintercommand
Mixstah
Mixstah

Reputation: 411

Tkinter calling functions within a class

Hi I am having trouble calling functions in tkinter

Here is the code

class Demo(tk.Frame):
    def ShowOption(self):
        print(self.v1.get())

    def __init__(self,controller):
        tk.Frame.__init__(self,width=800, height=600)
        f = Frame(self)

        optionList = ('A', 'B','C')
        self.v1 = tk.StringVar()
        self.v1.set(optionList[0])
        
        Opt1 = tk.OptionMenu(f, self.v1, *optionList,command = self.ShowOption)
        Opt1.grid(row=2,column=2,sticky='w')

        f.place(relx = 0.5,rely=0.5,anchor='c')

The problem I have is if I use this method it states the function takes 1 postional argument and none were given but if I use

        Opt1 = tk.OptionMenu(f, self.v1, *optionList,command = self.ShowOption() )

The function runs straight away when the class is created.

Any help greatly appreciated.

Upvotes: 0

Views: 45

Answers (2)

acw1668
acw1668

Reputation: 47193

Callback for the command option of OptionMenu expects an argument which is the selected item.

So either you use lambda to skip the argument:

command=lambda v: self.ShowOption()

Or redefine ShowOption() to accept an argument:

def ShowOption(self, value):
    ...

Upvotes: 1

gaetan1903
gaetan1903

Reputation: 34

do this

command = lambda : self.ShowOption()

Upvotes: 0

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