[Suggestion] ReactiveCommand IsExecuting

[michaelstonis]

It would be helpful if there were a way to track when a ReactiveCommand is executing. This can be helpful in many UI scenarios. For example, when a button click is bound to a command, you may want the button to remain disabled while execution is performed. I believe that ReactiveCommand<T> and ReactiveCommand<TInput,TOutput> could be extended to provide this by wrapping the execution or convert/Async, respectively.

Is this functionality that would be considered for R3?

Below is just a simple pseudo implementation of the concept. I am sure that there is a far more elegant way to approach this, but just wanted to put this here to show the functionality.

bool or IObservable<bool> IsExecuting;

public ReactiveCommand(Action<T> execute)
{
    this.list = new FreeListCore<Subscription>(this);
    this.canExecute = true;
    this.subscription = this.Subscribe(ManageExecution(execute));
}

private void ManageExecution(Action<T> execute)
{
	IsExecuting = true;
	execute();
	IsExecuting = false;
}

[michaelstonis]

I created a simple proof of concept.

https://github.com/michaelstonis/R3/blob/feature/reactivecommand-isexecuting/src/R3/ReactiveCommand.cs

https://github.com/michaelstonis/R3/blob/feature/reactivecommand-isexecuting/sandbox/MauiApp1/MainPage.xaml.cs

[neuecc]

Thanks.
Since there don't seem to be any performance concerns, it looks like it would be worth implementing.

[michaelstonis]

I added the following PR: #280