CODEWITHSUNDEEP
pythontkinter
user3745488
user3745488

Reputation: 11

Tkinter menubutton error

I'm very confused about this widget, can someone fix it ?

from Tkinter import *

master = Tk()
mytext = StringVar()
mytext.set("DEFAULT")
def test_function(evt):
  mb.menu.delete(0, END)
  for i in range(20):
    mb.menu.add("command", label='%s'%i, command= lambda : mytext.set("%s"%i))


mb=  Menubutton (master, text="Test", relief=RAISED )
mb.menu  =  Menu ( mb, tearoff = 0 )
mb["menu"]  =  mb.menu
mb.bind('<Button-1>', test_function)
mb.grid(row = 0, column=1)
Label(master, textvariable=mytext).grid(row = 0, column=0)

master.mainloop()

mytext always show the end of the list when selected the button how to solve it?

Upvotes: 0

Views: 157

Answers (1)

Kevin
Kevin

Reputation: 76194

mb.menu.add("command", label='%s'%i, command= lambda : mytext.set("%s"%i))

The i in the command lambda here binds to the last value that i had, rather than the value it had when you called add.

You can trick it into binding early by making it a default argument:

mb.menu.add("command", label='%s'%i, command= lambda i=i: mytext.set("%s"%i))

Upvotes: 1

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