wxPython Demo example for NotificationMessage doesn't work on 4.3.1?

wxPython Users
1

Testing on Linux Mint 22.3.

When I ran the NotificationMessage example from the wxPython Demo on 4.3.1, I noticed that no notification appeared when I pressed the button and no error messages appeared in the terminal. However, the same code on 4.2.5 does show a notification.

Here is a simplified standalone version of the example:

import wx
import wx.adv

class TestPanel(wx.Panel):
    def __init__(self, parent):
        wx.Panel.__init__(self, parent, -1)
        self.btn = wx.Button(self, -1, "Notify me of something...!", pos=(50,50))
        self.btn.Bind(wx.EVT_BUTTON, self.OnButton)

    def OnButton(self, event):
        notify = wx.adv.NotificationMessage(
            title="This is a Notification!",
            message="wxPython is awesome. Phoenix is awesomer! Python is awesomest!!\n\n"
                    "The quick brown fox jumped over the lazy dog.",
            parent=None, flags=wx.ICON_INFORMATION)

        notify.Show(timeout=5)

class TestFrame(wx.Frame):
    def __init__(self):
        wx.Frame.__init__(self, None)
        self.SetSize((300, 200))
        self.SetTitle("Test Notification Message")
        TestPanel(self)
        self.Layout()

if __name__ == '__main__':
    app = wx.App()
    frame = TestFrame()
    frame.Show()
    app.MainLoop()

I also downloaded the following raw test files from the master branch on GitHub:
https://github.com/wxWidgets/Phoenix/blob/7488693a120925af94f4c375e5e4b9c610b0d6f6/unittests/test_notifmsg.py
https://github.com/wxWidgets/Phoenix/blob/7488693a120925af94f4c375e5e4b9c610b0d6f6/unittests/wtc.py

I modified test_notifymsg.py to import the wtc module from the current directory and extended the duration the timeout to give:

import unittest
import wtc
import wx
import wx.adv

#---------------------------------------------------------------------------

class notifmsg_Tests(wtc.WidgetTestCase):

    def test_notifmsg1(self):
        nf = wx.adv.NotificationMessage("The Title", "This is the message")
        nf.Show()
        self.waitFor(3000)
        nf.Close()


#---------------------------------------------------------------------------

if __name__ == '__main__':
    unittest.main()

When I ran that test file on 4.3.1, it did show a notification.

Does anyone know why the unittest works on 4.3.1, but the demo example doesn’t?

2

It appears to be something to do with passing timeout=5 to the Show() method.

If I replace the line

        notify.Show(timeout=5)

with:

        notify.Show()
        wx.CallLater(5000, notify.Close)

Then it does work on 4.3.1.