How do I detect if a wx.Menu has been destroyed

Question

I’m porting an application from:

Python 2.5.4
2.8.10.1 (msw-unicode)

to:

Python 3.7.9
4.1.1 msw (phoenix) wxWidgets 3.1.5.

The following snippet gives different results. In particular it seems that previously you were able to detect if a wx.Menu had been deleted by just doing "if widget".

If that doesn’t work anymore, how can I check whether a wx.Menu has been deleted?

import wx

app = wx.App(redirect=False)
menu = wx.Menu()
menu.Destroy()
print(bool(menu))

2.8.10.1 = False
4.1.1 = True

Asked By: Anton Lahti

||

Source

Answer 1

I can’t check how it used to work as I have no access to a legacy system.

However you can write a simple function to check whether or not the item is deleted by looking at its Window property. Just pass the reference to the menu into the function check_menu

def __init__(self, *args, **kwargs):
    super().__init__(None, *args, **kwargs)
    menu = wx.Menu()
    self.check_menu(menu)
    menu.Destroy()
    self.check_menu(menu)


@staticmethod
def check_menu(menu):
    try:
        menu.Window
        print('active')
    except RuntimeError:
        print('deleted')

Gives the results

active

deleted

Answered By: Psionman

How do I detect if a wx.Menu has been destroyed

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