#209 Make frame instance a class attribute of the app

[Brendan Simon]

The name of the frame instance generated is loca to the OnInit() function, therefore I can't reference the frame from outside the class (or the function).

class MyApp(wx.App):
    def OnInit(self):
        my_frame = MyFrame(None, wx.ID_ANY, "")
        self.SetTopWindow(my_frame)
        my_frame.Show()
        return True

could/should be:

class MyApp(wx.App):
    def OnInit(self):
        self.my_frame = MyFrame(None, wx.ID_ANY, "")
        self.SetTopWindow(self.my_frame)
        self.my_frame.Show()
        return True

This would allow access to the frame from outside the class. e.g. from the wxApp (or a derived wxApp) to then access one of the inner widets.

As an example if there is a text widget buried in the frame, and I want to use it (get or set data) from an an external asyncio coroutine/task then I need to obtain it via the hierachy. e.g. my_app.my_frame.my_text_ctrl.SetValue("new text")

There may be a better solution where the asyncio coroutine/task is a frame function. I need to investigate this further, but as a general rule it would be good to be able to access the frame from outside the class.

[Dietmar Schwertberger]

Yes, I've stumbled over this problem this week myself when code like "MyFrame = MyFrame(...)" triggered a "used before assignment" error. I did consider adding a "global MyFrame" statement, but your suggestion certainly makes more sense. Thanks for this.
Modified with commit 2336.
(Please submit feature requests under the appropriate category.)

Regards,
Dietmar