How to remove/ deactivate an event?

Question

Hi,
I have to disable a SelectionChanged event so it doesn't loop.
I enable it like so:

lvMouseKeys().SelectionChanged({ this, &MainWindow::lvMouseKeys_SelectionChanged });  

https://learn.microsoft.com/en-us/windows/uwp/cpp-and-winrt-apis/handle-events

Answer 1

I think that you can define a member like this: event_token et;

Then you can keep the result: et = lvMouseKeys().SelectionChanged({ this, &MainWindow::lvMouseKeys_SelectionChanged });

To disable the handler: lvMouseKeys().SelectionChanged( et ).

However, you can simply use a boolean flag at the beginning of the handler to skip the code.

Answer 2

Wow,
But that works great and that seems much simpler and clearer to me?!
I somehow can't find the parameters for SelectionChanged for AddHandler, so I can then apply the RemoveHandler as well. Maybe I'm talking nonsense again?! I read a bit about the event_token I think.

PS:

I also did that in WindowsForms with the handlers and then I recently saw/read that I could also do it with a flag. In addition, you can also use the Click event instead of the SelectionChanged, then of course it would be good if you could execute the click event via code, unfortunately I didn't find it, something like PerformClick (?!). It's not that easy...