How to change the values in tkinter's OptionMenu?

Question

The OptionMenu in tkinter takes any number of parameters for the options in the menu such as follows:

import tkinter as tk
newMenu = tk.OptionMenu(self, clicked, "A", "B", command=doSomething)

Is there a way to update the number of argumenets in OptionMenu so I can go from the above code to this new code:

newMenu = tk.OptionMenu(self, clicked, "A", "B", "C", "D", command=doSomething)

Does this answer your question? [updating-optionmenu-from-list](https://stackoverflow.com/questions/28412496) — stovfl, Jun 17 '20 at 09:05

jizhihaoSAMA · Accepted Answer · 2020-06-17T04:11:56.077

3

tk.OptionMenu has a Menu widget in it.

~~If you want to add some values,you could use add_command:~~

for i in ["C","D"]:
    newMenu['menu'].add_command(label=i)

If you want to remove some values, use delete:

newMenu['menu'].delete("0",tk.END) # this will remove all the values

@acw1668 pointed out a big problem in my code,if you want to also bind command and change the clicked variable.

Recommend this(acw1668 sugguests):

for i in ["C", "D"]:
    newMenu['menu'].add_command(label=i, command=tk._setit(clicked, i, doSomething))

this also could do but don't recommend:

for i in ["C", "D"]:
    newMenu['menu'].add_command(label=i, command=lambda i=i:clicked.set(i) or doSomething(i))

edited Jun 17 '20 at 04:11

answered Jun 17 '20 at 02:33

jizhihaoSAMA

1

Thank you! I played around with these commands and they make sense now. – ephemeralhappiness Jun 17 '20 at 02:54
1

But the newly added item will not call the `doSomething()` and set the `clicked` variable. – acw1668 Jun 17 '20 at 02:58
@acw1668 Right,I will try to figure it out.Thanks. – jizhihaoSAMA Jun 17 '20 at 03:05
@ephemeralhappiness You could refuse my answer so that I could delete it because I found a [duplicate question here](https://stackoverflow.com/questions/17580218/changing-the-options-of-a-optionmenu-when-clicking-a-button),this will be quite detailed. – jizhihaoSAMA Jun 17 '20 at 03:12
@jizhihaoSAMA I implemented your edited code with the additional arguments to the add_command(), but I can't seem to get each new option to have a corresponding command associated with it. Only the label updates upon selection. – ephemeralhappiness Jun 17 '20 at 03:50
1

Try `newMenu['menu'].add_command(label=i, command=tk._setit(clicked, i, doSomething))`. – acw1668 Jun 17 '20 at 04:01
@ephemeralhappiness acw1668 comment also could work. – jizhihaoSAMA Jun 17 '20 at 04:12
@acw1668 You could consider to post it as an answer,sir. – jizhihaoSAMA Jun 17 '20 at 04:12
@jizhihaoSAMA Thank you as well! Now I know how to use add_command functionalities in a tkinter method. – ephemeralhappiness Jun 17 '20 at 04:14

1 Answers1