How to use AsyncCommand canExecuteChangedFactory?

[RedX2501]

I'm trying to use pre3 and it seems that I cannot pass a simple function any more as the the second parameter for the AsyncCommand as you have suggested here: https://github.com/StephenCleary/Mvvm.Async/issues/11#issuecomment-259687116

What is the expected way of using the factory in pre3 release?

[StephenCleary]

The factory is a specific implementation of the CanExecuteChanged event (not it's logic).

The current AsyncCommand class always ties CanExecute to IsExecuting. If you need different logic, you'd need to derive a custom type from AsyncCommandBase.

Hope this helps, -Steve

[RedX2501]

Thanks for the hint. I didn't understand that from the comments.

So this means that if a command shall only execute on a certain pre-condition you would expect a new property to be introduced and that bound to the IsEnabled property in the XAML?

bool CanExecuteCommandX => !AsynCommandGenerateX.IsExecuting && otherCondition

That seems overly cumbersome and against most examples and books about WPF and the Command parameter.

[SittenSpynne]

It's overly cumbersome and sort of against the idea of even taking delegate arguments if I have to derive a new type to support CanExecuteChanged.

Extant conversations and StackOverflow discussions seem to indicate the OnCanExecuteChanged() method used to be public. Why did it change to protected?