Implement the confirmation dialog for CommandResult.Confirm

[zadjii-msft]

as spec'd in #395

we need a dialog to prompt for confirmation of certain destructive commands.

[moooyo]

I've investigated some possible implement, and I think we need to discuss some API design for this usage.

Just a example, please consider we need to do a dangerous operator, such as shut down the computer.
So, we need to show a dialog to user and let them decide Yes/No. Then base on the choice, do the right thing.

So, if our design is, return a CommandResult.Confirm, what's the next step? Where should we get the result and continue to process?

I make a simple demo to show my implement. I set up the dialog configuration and the callback function, then pass it to the host. Host will create a new window and show the dialog on this new window (not cmdpal), receive user's selection and use it to call the callback function.

@zadjii-msft any suggestion?

content-dialog.mp4

[zadjii-msft]

@moooyo is there any reason we can't just open that ContentDialog within the main CmdPal window itself? the way I tried to spec out the IConfirmationArgs of CommandResult.Confirm was basically just things we'd need to put into a content dialog, so I figure that'd work, right?

[moooyo]

@moooyo is there any reason we can't just open that ContentDialog within the main CmdPal window itself? the way I tried to spec out the IConfirmationArgs of CommandResult.Confirm was basically just things we'd need to put into a content dialog, so I figure that'd work, right?

Oh...My bad, we can do. I was trapped in the contentDialog API itself before. We can do it sure. I will try to implement it on the main page. @zadjii-msft

[moooyo]

How about this one? @zadjii-msft

Video.Project.7.mp4

Code here: #536

[zadjii-msft]

That's like exactly what I pictured!