TrayIcon.Menu: NativeMenu. Opening event is never invoked

Describe the bug I’m trying to create a tray icon menu with dynamic menu items. In order to refresh all items right before right-clicking the tray, I’m subscribing to the NeedsUpdate event of the NativeMenu that is assigned to the tray icon. However, that event is never invoked. Same issue with the Opening event; that isn’t raised either.

To Reproduce Steps to reproduce the behavior:

In my App.xaml I’ve declared a TrayIcon:

<TrayIcon.Icons>
    <TrayIcons>
        <TrayIcon 
                  Icon="/Resources/icon_white.ico" 
                  ToolTipText="App" 
                  Clicked="TrayIcon_OnClicked">
            <TrayIcon.Menu>
                <NativeMenu Items="{Binding MenuItems}"
                            NeedsUpdate="NativeMenu_OnNeedsUpdate"/>
            </TrayIcon.Menu>
        </TrayIcon>
    </TrayIcons>
</TrayIcon.Icons>

In App.xaml.cs:

private void NativeMenu_OnNeedsUpdate(object? sender, EventArgs e)
{
    Log.Debug("This line gets never called");
}

Expected behavior Invoke events properly when opening a tray icon menu

Desktop:

• OS: Arch Linux 5.15.36-1-lts (KDE)
• Version 0.10.13

[timunie]

Indeed, looks like Opening-event is never called. However, I found a way to make dynamic menus work. Here is a draft that for sure needs some more love (null-checks, initial population etc.)

public ObservableCollection<string> MenuItems { get; } = new();

public App() : base()
{
    MenuItems.CollectionChanged += (sender, e) =>
    {
        // Add new Items
        foreach (var newItem in e.NewItems ?? Array.Empty<string>())
        {
            TrayIcon.GetIcons(this).First().Menu.Items.Add(new NativeMenuItem((string)newItem));
        }

        // Remove old items
        foreach (var oldItem in e.OldItems ?? Array.Empty<string>())
        {
            var itemToRemove = TrayIcon.GetIcons(this).First().Menu.Items
                .FirstOrDefault(x => ((NativeMenuItem)x).Header == (string)oldItem);

            TrayIcon.GetIcons(this).First().Menu.Items.Remove(itemToRemove);
        }
    };
}

My App.axaml looks like this:

<TrayIcon.Icons>
  <TrayIcons>
    <TrayIcon 
      x:DataType="sandbox:App"
      Icon="test_icon.ico" 
      ToolTipText="App" >
      <TrayIcon.Menu>
        <NativeMenu />
      </TrayIcon.Menu>
    </TrayIcon>
  </TrayIcons>
</TrayIcon.Icons>

And inside a Button-click I do this:

(Application.Current as App)?.MenuItems.Add($"Added Item {i++}");

[ThePBone]

It’s a xml doc: https://github.com/AvaloniaUI/Avalonia/blob/2c7ae3a50fdbf7878f8dadc72fc5ddf5b24cd546/src/Avalonia.Controls/NativeMenu.cs#L23